blob: 95f1a458371df36c62f0ff7f1e44545dbda97866 [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 {
Al Viro9f855292006-09-27 18:44:30 -070041 __be32 *saddr;
42 __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
68static inline void inet_diag_unlock_handler(
69 const struct inet_diag_handler *handler)
70{
71 mutex_unlock(&inet_diag_table_mutex);
72}
73
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +000074int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
Pavel Emelyanovc8991362012-01-10 22:36:35 +000075 struct sk_buff *skb, struct inet_diag_req_v2 *req,
Eric W. Biedermand06ca952012-05-24 17:58:08 -060076 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +000077 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -080078 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070080 const struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030081 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct nlmsghdr *nlh;
Thomas Graf6e277ed2012-06-26 23:36:12 +000083 struct nlattr *attr;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030084 void *info = NULL;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030085 const struct inet_diag_handler *handler;
Pavel Emelyanova029fe22011-12-06 07:59:32 +000086 int ext = req->idiag_ext;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030087
Pavel Emelyanova029fe22011-12-06 07:59:32 +000088 handler = inet_diag_table[req->sdiag_protocol];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030089 BUG_ON(handler == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Eric W. Biederman15e47302012-09-07 20:12:54 +000091 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +000092 nlmsg_flags);
93 if (!nlh)
David S. Millerd1063522012-06-26 21:28:54 -070094 return -EMSGSIZE;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030095
David S. Millerd1063522012-06-26 21:28:54 -070096 r = nlmsg_data(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080097 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -080098
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030099 r->idiag_family = sk->sk_family;
100 r->idiag_state = sk->sk_state;
101 r->idiag_timer = 0;
102 r->idiag_retrans = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300104 r->id.idiag_if = sk->sk_bound_dev_if;
Pavel Emelyanovf65c1b52011-12-15 02:43:44 +0000105 sock_diag_save_cookie(sk, r->id.idiag_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000107 r->id.idiag_sport = inet->inet_sport;
108 r->id.idiag_dport = inet->inet_dport;
109 r->id.idiag_src[0] = inet->inet_rcv_saddr;
110 r->id.idiag_dst[0] = inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500112 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
113 * hence this needs to be included regardless of socket family.
114 */
115 if (ext & (1 << (INET_DIAG_TOS - 1)))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000116 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
117 goto errout;
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500118
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000119#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300120 if (r->idiag_family == AF_INET6) {
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000121 const struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000123 *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr;
124 *(struct in6_addr *)r->id.idiag_dst = np->daddr;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000125
Maciej Żenczykowski06236ac2011-11-07 14:23:11 +0000126 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000127 if (nla_put_u8(skb, INET_DIAG_TCLASS, np->tclass) < 0)
128 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 }
130#endif
131
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600132 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000133 r->idiag_inode = sock_i_ino(sk);
134
Thomas Graf6e277ed2012-06-26 23:36:12 +0000135 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
136 struct inet_diag_meminfo minfo = {
137 .idiag_rmem = sk_rmem_alloc_get(sk),
138 .idiag_wmem = sk->sk_wmem_queued,
139 .idiag_fmem = sk->sk_forward_alloc,
140 .idiag_tmem = sk_wmem_alloc_get(sk),
141 };
142
143 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
144 goto errout;
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000145 }
146
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000147 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
148 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000149 goto errout;
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000150
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000151 if (icsk == NULL) {
Shan Wei62ad6fc2012-04-24 18:15:41 +0000152 handler->idiag_get_info(sk, r, NULL);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000153 goto out;
154 }
155
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700156#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700158 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300159 r->idiag_timer = 1;
160 r->idiag_retrans = icsk->icsk_retransmits;
161 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700162 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300163 r->idiag_timer = 4;
164 r->idiag_retrans = icsk->icsk_probes_out;
165 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300167 r->idiag_timer = 2;
168 r->idiag_retrans = icsk->icsk_probes_out;
169 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300171 r->idiag_timer = 0;
172 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 }
174#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300175
Thomas Graf6e277ed2012-06-26 23:36:12 +0000176 if (ext & (1 << (INET_DIAG_INFO - 1))) {
177 attr = nla_reserve(skb, INET_DIAG_INFO,
178 sizeof(struct tcp_info));
179 if (!attr)
180 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Thomas Graf6e277ed2012-06-26 23:36:12 +0000182 info = nla_data(attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 }
184
Thomas Graf6e277ed2012-06-26 23:36:12 +0000185 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops)
186 if (nla_put_string(skb, INET_DIAG_CONG,
187 icsk->icsk_ca_ops->name) < 0)
188 goto errout;
189
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300190 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Arnaldo Carvalho de Melo6687e982005-08-10 04:03:31 -0300192 if (sk->sk_state < TCP_TIME_WAIT &&
193 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
194 icsk->icsk_ca_ops->get_info(sk, ext, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000196out:
Thomas Graf6e277ed2012-06-26 23:36:12 +0000197 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Thomas Graf6e277ed2012-06-26 23:36:12 +0000199errout:
200 nlmsg_cancel(skb, nlh);
Patrick McHardy26932562007-01-31 23:16:40 -0800201 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202}
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000203EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
204
205static int inet_csk_diag_fill(struct sock *sk,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000206 struct sk_buff *skb, struct inet_diag_req_v2 *req,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600207 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000208 u32 portid, u32 seq, u16 nlmsg_flags,
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000209 const struct nlmsghdr *unlh)
210{
211 return inet_sk_diag_fill(sk, inet_csk(sk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000212 skb, req, user_ns, portid, seq, nlmsg_flags, unlh);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000213}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800215static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000216 struct sk_buff *skb, struct inet_diag_req_v2 *req,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000217 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800218 const struct nlmsghdr *unlh)
219{
220 long tmo;
221 struct inet_diag_msg *r;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000222 struct nlmsghdr *nlh;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800223
Eric W. Biederman15e47302012-09-07 20:12:54 +0000224 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +0000225 nlmsg_flags);
226 if (!nlh)
David S. Millerd1063522012-06-26 21:28:54 -0700227 return -EMSGSIZE;
David S. Millerd1063522012-06-26 21:28:54 -0700228
229 r = nlmsg_data(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800230 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
231
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800232 tmo = tw->tw_ttd - jiffies;
233 if (tmo < 0)
234 tmo = 0;
235
236 r->idiag_family = tw->tw_family;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800237 r->idiag_retrans = 0;
238 r->id.idiag_if = tw->tw_bound_dev_if;
Pavel Emelyanovf65c1b52011-12-15 02:43:44 +0000239 sock_diag_save_cookie(tw, r->id.idiag_cookie);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800240 r->id.idiag_sport = tw->tw_sport;
241 r->id.idiag_dport = tw->tw_dport;
242 r->id.idiag_src[0] = tw->tw_rcv_saddr;
243 r->id.idiag_dst[0] = tw->tw_daddr;
244 r->idiag_state = tw->tw_substate;
245 r->idiag_timer = 3;
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700246 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800247 r->idiag_rqueue = 0;
248 r->idiag_wqueue = 0;
249 r->idiag_uid = 0;
250 r->idiag_inode = 0;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000251#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800252 if (tw->tw_family == AF_INET6) {
253 const struct inet6_timewait_sock *tw6 =
254 inet6_twsk((struct sock *)tw);
255
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000256 *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr;
257 *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800258 }
259#endif
Thomas Graf6e277ed2012-06-26 23:36:12 +0000260
261 return nlmsg_end(skb, nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800262}
263
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800264static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600265 struct inet_diag_req_v2 *r,
266 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000267 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800268 const struct nlmsghdr *unlh)
269{
270 if (sk->sk_state == TCP_TIME_WAIT)
271 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000272 skb, r, portid, seq, nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800273 unlh);
Eric W. Biederman15e47302012-09-07 20:12:54 +0000274 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, nlmsg_flags, unlh);
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800275}
276
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000277int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000278 const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279{
280 int err;
281 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 struct sk_buff *rep;
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000283 struct net *net = sock_net(in_skb->sk);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300284
Herbert Xud523a322007-12-03 15:51:25 +1100285 err = -EINVAL;
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000286 if (req->sdiag_family == AF_INET) {
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000287 sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0],
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300288 req->id.idiag_dport, req->id.idiag_src[0],
289 req->id.idiag_sport, req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 }
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000291#if IS_ENABLED(CONFIG_IPV6)
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000292 else if (req->sdiag_family == AF_INET6) {
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000293 sk = inet6_lookup(net, hashinfo,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300294 (struct in6_addr *)req->id.idiag_dst,
295 req->id.idiag_dport,
296 (struct in6_addr *)req->id.idiag_src,
297 req->id.idiag_sport,
298 req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 }
300#endif
301 else {
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000302 goto out_nosk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 }
304
Herbert Xud523a322007-12-03 15:51:25 +1100305 err = -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 if (sk == NULL)
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000307 goto out_nosk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Pavel Emelyanovf65c1b52011-12-15 02:43:44 +0000309 err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
Pavel Emelyanovb005ab42011-12-09 06:21:53 +0000310 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 goto out;
312
Thomas Graf6e277ed2012-06-26 23:36:12 +0000313 rep = nlmsg_new(sizeof(struct inet_diag_msg) +
314 sizeof(struct inet_diag_meminfo) +
315 sizeof(struct tcp_info) + 64, GFP_KERNEL);
316 if (!rep) {
317 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 goto out;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000319 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000321 err = sk_diag_fill(sk, rep, req,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600322 sk_user_ns(NETLINK_CB(in_skb).ssk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000323 NETLINK_CB(in_skb).portid,
Patrick McHardy26932562007-01-31 23:16:40 -0800324 nlh->nlmsg_seq, 0, nlh);
325 if (err < 0) {
326 WARN_ON(err == -EMSGSIZE);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000327 nlmsg_free(rep);
Patrick McHardy26932562007-01-31 23:16:40 -0800328 goto out;
329 }
Eric W. Biederman15e47302012-09-07 20:12:54 +0000330 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300331 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 if (err > 0)
333 err = 0;
334
335out:
336 if (sk) {
337 if (sk->sk_state == TCP_TIME_WAIT)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700338 inet_twsk_put((struct inet_timewait_sock *)sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 else
340 sock_put(sk);
341 }
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000342out_nosk:
343 return err;
344}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000345EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000346
347static int inet_diag_get_exact(struct sk_buff *in_skb,
348 const struct nlmsghdr *nlh,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000349 struct inet_diag_req_v2 *req)
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000350{
351 const struct inet_diag_handler *handler;
352 int err;
353
354 handler = inet_diag_lock_handler(req->sdiag_protocol);
355 if (IS_ERR(handler))
356 err = PTR_ERR(handler);
357 else
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000358 err = handler->dump_one(in_skb, nlh, req);
Herbert Xud523a322007-12-03 15:51:25 +1100359 inet_diag_unlock_handler(handler);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 return err;
362}
363
Al Viro9f855292006-09-27 18:44:30 -0700364static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365{
366 int words = bits >> 5;
367
368 bits &= 0x1f;
369
370 if (words) {
371 if (memcmp(a1, a2, words << 2))
372 return 0;
373 }
374 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700375 __be32 w1, w2;
376 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 w1 = a1[words];
379 w2 = a2[words];
380
381 mask = htonl((0xffffffff) << (32 - bits));
382
383 if ((w1 ^ w2) & mask)
384 return 0;
385 }
386
387 return 1;
388}
389
390
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000391static int inet_diag_bc_run(const struct nlattr *_bc,
392 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000394 const void *bc = nla_data(_bc);
395 int len = nla_len(_bc);
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 while (len > 0) {
398 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300399 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300402 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300404 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 yes = 0;
406 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300407 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 yes = entry->sport >= op[1].no;
409 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300410 case INET_DIAG_BC_S_LE:
Roel Kluinb4ced2b2010-01-19 14:12:20 -0800411 yes = entry->sport <= op[1].no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300413 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 yes = entry->dport >= op[1].no;
415 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300416 case INET_DIAG_BC_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 yes = entry->dport <= op[1].no;
418 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300419 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
421 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300422 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300423 case INET_DIAG_BC_D_COND: {
424 struct inet_diag_hostcond *cond;
Al Viro9f855292006-09-27 18:44:30 -0700425 __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300427 cond = (struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300429 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 entry->sport : entry->dport)) {
431 yes = 0;
432 break;
433 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800434
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300435 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 addr = entry->saddr;
437 else
438 addr = entry->daddr;
439
Neal Cardwellf67caec2012-12-08 19:43:23 +0000440 if (cond->family != AF_UNSPEC &&
441 cond->family != entry->family) {
442 if (entry->family == AF_INET6 &&
443 cond->family == AF_INET) {
444 if (addr[0] == 0 && addr[1] == 0 &&
445 addr[2] == htonl(0xffff) &&
446 bitstring_match(addr + 3,
447 cond->addr,
448 cond->prefix_len))
449 break;
450 }
451 yes = 0;
452 break;
453 }
454
455 if (cond->prefix_len == 0)
456 break;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800457 if (bitstring_match(addr, cond->addr,
458 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 yes = 0;
461 break;
462 }
463 }
464
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800465 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 len -= op->yes;
467 bc += op->yes;
468 } else {
469 len -= op->no;
470 bc += op->no;
471 }
472 }
Eric Dumazeta02cec22010-09-22 20:43:57 +0000473 return len == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474}
475
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000476int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
477{
478 struct inet_diag_entry entry;
479 struct inet_sock *inet = inet_sk(sk);
480
481 if (bc == NULL)
482 return 1;
483
484 entry.family = sk->sk_family;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000485#if IS_ENABLED(CONFIG_IPV6)
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000486 if (entry.family == AF_INET6) {
487 struct ipv6_pinfo *np = inet6_sk(sk);
488
489 entry.saddr = np->rcv_saddr.s6_addr32;
490 entry.daddr = np->daddr.s6_addr32;
491 } else
492#endif
493 {
494 entry.saddr = &inet->inet_rcv_saddr;
495 entry.daddr = &inet->inet_daddr;
496 }
497 entry.sport = inet->inet_num;
498 entry.dport = ntohs(inet->inet_dport);
499 entry.userlocks = sk->sk_userlocks;
500
501 return inet_diag_bc_run(bc, &entry);
502}
503EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505static int valid_cc(const void *bc, int len, int cc)
506{
507 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300508 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510 if (cc > len)
511 return 0;
512 if (cc == len)
513 return 1;
Eric Dumazeteeb14972011-06-17 16:25:39 -0400514 if (op->yes < 4 || op->yes & 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 return 0;
516 len -= op->yes;
517 bc += op->yes;
518 }
519 return 0;
520}
521
Neal Cardwell405c0052012-12-08 19:43:22 +0000522/* Validate an inet_diag_hostcond. */
523static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
524 int *min_len)
525{
526 int addr_len;
527 struct inet_diag_hostcond *cond;
528
529 /* Check hostcond space. */
530 *min_len += sizeof(struct inet_diag_hostcond);
531 if (len < *min_len)
532 return false;
533 cond = (struct inet_diag_hostcond *)(op + 1);
534
535 /* Check address family and address length. */
536 switch (cond->family) {
537 case AF_UNSPEC:
538 addr_len = 0;
539 break;
540 case AF_INET:
541 addr_len = sizeof(struct in_addr);
542 break;
543 case AF_INET6:
544 addr_len = sizeof(struct in6_addr);
545 break;
546 default:
547 return false;
548 }
549 *min_len += addr_len;
550 if (len < *min_len)
551 return false;
552
553 /* Check prefix length (in bits) vs address length (in bytes). */
554 if (cond->prefix_len > 8 * addr_len)
555 return false;
556
557 return true;
558}
559
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300560static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561{
Eric Dumazeteeb14972011-06-17 16:25:39 -0400562 const void *bc = bytecode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 int len = bytecode_len;
564
565 while (len > 0) {
Eric Dumazeteeb14972011-06-17 16:25:39 -0400566 const struct inet_diag_bc_op *op = bc;
Neal Cardwell405c0052012-12-08 19:43:22 +0000567 int min_len = sizeof(struct inet_diag_bc_op);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
569//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
570 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300571 case INET_DIAG_BC_S_COND:
572 case INET_DIAG_BC_D_COND:
Neal Cardwell405c0052012-12-08 19:43:22 +0000573 if (!valid_hostcond(bc, len, &min_len))
574 return -EINVAL;
575 /* fall through */
576 case INET_DIAG_BC_AUTO:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300577 case INET_DIAG_BC_S_GE:
578 case INET_DIAG_BC_S_LE:
579 case INET_DIAG_BC_D_GE:
580 case INET_DIAG_BC_D_LE:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300581 case INET_DIAG_BC_JMP:
Neal Cardwell405c0052012-12-08 19:43:22 +0000582 if (op->no < min_len || op->no > len + 4 || op->no & 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 return -EINVAL;
584 if (op->no < len &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300585 !valid_cc(bytecode, bytecode_len, len - op->no))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 return -EINVAL;
587 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300588 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 break;
590 default:
591 return -EINVAL;
592 }
Neal Cardwell405c0052012-12-08 19:43:22 +0000593 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
Eric Dumazeteeb14972011-06-17 16:25:39 -0400594 return -EINVAL;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800595 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 len -= op->yes;
597 }
598 return len == 0 ? 0 : -EINVAL;
599}
600
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800601static int inet_csk_diag_dump(struct sock *sk,
602 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000603 struct netlink_callback *cb,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000604 struct inet_diag_req_v2 *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000605 const struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606{
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000607 if (!inet_diag_bc_sk(bc, sk))
608 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000610 return inet_csk_diag_fill(sk, skb, r,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600611 sk_user_ns(NETLINK_CB(cb->skb).ssk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000612 NETLINK_CB(cb->skb).portid,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800613 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614}
615
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800616static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
617 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000618 struct netlink_callback *cb,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000619 struct inet_diag_req_v2 *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000620 const struct nlattr *bc)
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800621{
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000622 if (bc != NULL) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800623 struct inet_diag_entry entry;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800624
625 entry.family = tw->tw_family;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000626#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800627 if (tw->tw_family == AF_INET6) {
628 struct inet6_timewait_sock *tw6 =
629 inet6_twsk((struct sock *)tw);
630 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
631 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
632 } else
633#endif
634 {
635 entry.saddr = &tw->tw_rcv_saddr;
636 entry.daddr = &tw->tw_daddr;
637 }
638 entry.sport = tw->tw_num;
639 entry.dport = ntohs(tw->tw_dport);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900640 entry.userlocks = 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800641
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000642 if (!inet_diag_bc_run(bc, &entry))
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800643 return 0;
644 }
645
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000646 return inet_twsk_diag_fill(tw, skb, r,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000647 NETLINK_CB(cb->skb).portid,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800648 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
649}
650
Neal Cardwell1c95df82012-12-08 19:43:21 +0000651/* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses
652 * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6.
653 */
654static inline void inet_diag_req_addrs(const struct sock *sk,
655 const struct request_sock *req,
656 struct inet_diag_entry *entry)
657{
658 struct inet_request_sock *ireq = inet_rsk(req);
659
660#if IS_ENABLED(CONFIG_IPV6)
661 if (sk->sk_family == AF_INET6) {
662 if (req->rsk_ops->family == AF_INET6) {
663 entry->saddr = inet6_rsk(req)->loc_addr.s6_addr32;
664 entry->daddr = inet6_rsk(req)->rmt_addr.s6_addr32;
665 } else if (req->rsk_ops->family == AF_INET) {
666 ipv6_addr_set_v4mapped(ireq->loc_addr,
667 &entry->saddr_storage);
668 ipv6_addr_set_v4mapped(ireq->rmt_addr,
669 &entry->daddr_storage);
670 entry->saddr = entry->saddr_storage.s6_addr32;
671 entry->daddr = entry->daddr_storage.s6_addr32;
672 }
673 } else
674#endif
675 {
676 entry->saddr = &ireq->loc_addr;
677 entry->daddr = &ireq->rmt_addr;
678 }
679}
680
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300681static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600682 struct request_sock *req,
683 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000684 u32 portid, u32 seq,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800685 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686{
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700687 const struct inet_request_sock *ireq = inet_rsk(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300689 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 struct nlmsghdr *nlh;
691 long tmo;
692
Eric W. Biederman15e47302012-09-07 20:12:54 +0000693 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +0000694 NLM_F_MULTI);
695 if (!nlh)
696 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Thomas Graf6e277ed2012-06-26 23:36:12 +0000698 r = nlmsg_data(nlh);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300699 r->idiag_family = sk->sk_family;
700 r->idiag_state = TCP_SYN_RECV;
701 r->idiag_timer = 1;
702 r->idiag_retrans = req->retrans;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300704 r->id.idiag_if = sk->sk_bound_dev_if;
Pavel Emelyanovf65c1b52011-12-15 02:43:44 +0000705 sock_diag_save_cookie(req, r->id.idiag_cookie);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707 tmo = req->expires - jiffies;
708 if (tmo < 0)
709 tmo = 0;
710
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000711 r->id.idiag_sport = inet->inet_sport;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300712 r->id.idiag_dport = ireq->rmt_port;
713 r->id.idiag_src[0] = ireq->loc_addr;
714 r->id.idiag_dst[0] = ireq->rmt_addr;
715 r->idiag_expires = jiffies_to_msecs(tmo);
716 r->idiag_rqueue = 0;
717 r->idiag_wqueue = 0;
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600718 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300719 r->idiag_inode = 0;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000720#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300721 if (r->idiag_family == AF_INET6) {
Neal Cardwell1c95df82012-12-08 19:43:21 +0000722 struct inet_diag_entry entry;
723 inet_diag_req_addrs(sk, req, &entry);
724 memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr));
725 memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 }
727#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728
Thomas Graf6e277ed2012-06-26 23:36:12 +0000729 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730}
731
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300732static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000733 struct netlink_callback *cb,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000734 struct inet_diag_req_v2 *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000735 const struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300737 struct inet_diag_entry entry;
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700738 struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo2ad69c52005-06-18 22:48:55 -0700739 struct listen_sock *lopt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 struct inet_sock *inet = inet_sk(sk);
741 int j, s_j;
742 int reqnum, s_reqnum;
743 int err = 0;
744
745 s_j = cb->args[3];
746 s_reqnum = cb->args[4];
747
748 if (s_j > 0)
749 s_j--;
750
751 entry.family = sk->sk_family;
752
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700753 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700755 lopt = icsk->icsk_accept_queue.listen_opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 if (!lopt || !lopt->qlen)
757 goto out;
758
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000759 if (bc != NULL) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000760 entry.sport = inet->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 entry.userlocks = sk->sk_userlocks;
762 }
763
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300764 for (j = s_j; j < lopt->nr_table_entries; j++) {
Arnaldo Carvalho de Melo60236fd2005-06-18 22:47:21 -0700765 struct request_sock *req, *head = lopt->syn_table[j];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
767 reqnum = 0;
768 for (req = head; req; reqnum++, req = req->dl_next) {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700769 struct inet_request_sock *ireq = inet_rsk(req);
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 if (reqnum < s_reqnum)
772 continue;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300773 if (r->id.idiag_dport != ireq->rmt_port &&
774 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 continue;
776
777 if (bc) {
Neal Cardwell1c95df82012-12-08 19:43:21 +0000778 inet_diag_req_addrs(sk, req, &entry);
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700779 entry.dport = ntohs(ireq->rmt_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000781 if (!inet_diag_bc_run(bc, &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 continue;
783 }
784
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300785 err = inet_diag_fill_req(skb, sk, req,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600786 sk_user_ns(NETLINK_CB(cb->skb).ssk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000787 NETLINK_CB(cb->skb).portid,
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300788 cb->nlh->nlmsg_seq, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 if (err < 0) {
790 cb->args[3] = j + 1;
791 cb->args[4] = reqnum;
792 goto out;
793 }
794 }
795
796 s_reqnum = 0;
797 }
798
799out:
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700800 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801
802 return err;
803}
804
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000805void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000806 struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807{
808 int i, num;
809 int s_i, s_num;
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000810 struct net *net = sock_net(skb->sk);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 s_i = cb->args[1];
813 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300814
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 if (cb->args[0] == 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300816 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300818
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700819 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 struct sock *sk;
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800821 struct hlist_nulls_node *node;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800822 struct inet_listen_hashbucket *ilb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
824 num = 0;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800825 ilb = &hashinfo->listening_hash[i];
826 spin_lock_bh(&ilb->lock);
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800827 sk_nulls_for_each(sk, node, &ilb->head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 struct inet_sock *inet = inet_sk(sk);
829
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000830 if (!net_eq(sock_net(sk), net))
831 continue;
832
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 if (num < s_num) {
834 num++;
835 continue;
836 }
837
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000838 if (r->sdiag_family != AF_UNSPEC &&
839 sk->sk_family != r->sdiag_family)
840 goto next_listen;
841
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000842 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300843 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 goto next_listen;
845
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300846 if (!(r->idiag_states & TCPF_LISTEN) ||
847 r->id.idiag_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 cb->args[3] > 0)
849 goto syn_recv;
850
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000851 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800852 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 goto done;
854 }
855
856syn_recv:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300857 if (!(r->idiag_states & TCPF_SYN_RECV))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 goto next_listen;
859
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000860 if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800861 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 goto done;
863 }
864
865next_listen:
866 cb->args[3] = 0;
867 cb->args[4] = 0;
868 ++num;
869 }
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800870 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872 s_num = 0;
873 cb->args[3] = 0;
874 cb->args[4] = 0;
875 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876skip_listen_ht:
877 cb->args[0] = 1;
878 s_i = num = s_num = 0;
879 }
880
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300881 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000882 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883
Eric Dumazetf373b532009-10-09 00:16:19 +0000884 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300885 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
David S. Miller7e3aab42008-11-21 16:39:19 -0800886 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 struct sock *sk;
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800888 struct hlist_nulls_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
Andi Kleen6be547a2008-08-28 01:09:54 -0700890 num = 0;
891
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800892 if (hlist_nulls_empty(&head->chain) &&
893 hlist_nulls_empty(&head->twchain))
Andi Kleen6be547a2008-08-28 01:09:54 -0700894 continue;
895
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 if (i > s_i)
897 s_num = 0;
898
David S. Miller7e3aab42008-11-21 16:39:19 -0800899 spin_lock_bh(lock);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800900 sk_nulls_for_each(sk, node, &head->chain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 struct inet_sock *inet = inet_sk(sk);
902
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000903 if (!net_eq(sock_net(sk), net))
904 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 if (num < s_num)
906 goto next_normal;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300907 if (!(r->idiag_states & (1 << sk->sk_state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 goto next_normal;
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000909 if (r->sdiag_family != AF_UNSPEC &&
910 sk->sk_family != r->sdiag_family)
911 goto next_normal;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000912 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300913 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 goto next_normal;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000915 if (r->id.idiag_dport != inet->inet_dport &&
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800916 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 goto next_normal;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000918 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800919 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 goto done;
921 }
922next_normal:
923 ++num;
924 }
925
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300926 if (r->idiag_states & TCPF_TIME_WAIT) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800927 struct inet_timewait_sock *tw;
928
929 inet_twsk_for_each(tw, node,
Eric Dumazetdbca9b2752007-02-08 14:16:46 -0800930 &head->twchain) {
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000931 if (!net_eq(twsk_net(tw), net))
932 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
934 if (num < s_num)
935 goto next_dying;
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000936 if (r->sdiag_family != AF_UNSPEC &&
937 tw->tw_family != r->sdiag_family)
938 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800939 if (r->id.idiag_sport != tw->tw_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300940 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800942 if (r->id.idiag_dport != tw->tw_dport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300943 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 goto next_dying;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000945 if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800946 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 goto done;
948 }
949next_dying:
950 ++num;
951 }
952 }
David S. Miller7e3aab42008-11-21 16:39:19 -0800953 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 }
955
956done:
957 cb->args[1] = i;
958 cb->args[2] = num;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000959out:
960 ;
961}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000962EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000963
964static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000965 struct inet_diag_req_v2 *r, struct nlattr *bc)
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000966{
967 const struct inet_diag_handler *handler;
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000968 int err = 0;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000969
970 handler = inet_diag_lock_handler(r->sdiag_protocol);
971 if (!IS_ERR(handler))
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000972 handler->dump(skb, cb, r, bc);
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000973 else
974 err = PTR_ERR(handler);
Herbert Xud523a322007-12-03 15:51:25 +1100975 inet_diag_unlock_handler(handler);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000976
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000977 return err ? : skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978}
979
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000980static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
981{
982 struct nlattr *bc = NULL;
Pavel Emelyanovc8991362012-01-10 22:36:35 +0000983 int hdrlen = sizeof(struct inet_diag_req_v2);
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000984
985 if (nlmsg_attrlen(cb->nlh, hdrlen))
986 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
987
David S. Millerd1063522012-06-26 21:28:54 -0700988 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000989}
990
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000991static inline int inet_diag_type2proto(int type)
992{
993 switch (type) {
994 case TCPDIAG_GETSOCK:
995 return IPPROTO_TCP;
996 case DCCPDIAG_GETSOCK:
997 return IPPROTO_DCCP;
998 default:
999 return 0;
1000 }
1001}
1002
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001003static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb)
1004{
David S. Millerd1063522012-06-26 21:28:54 -07001005 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001006 struct inet_diag_req_v2 req;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001007 struct nlattr *bc = NULL;
Pavel Emelyanov3b09c842012-01-10 22:37:26 +00001008 int hdrlen = sizeof(struct inet_diag_req);
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001009
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +00001010 req.sdiag_family = AF_UNSPEC; /* compatibility */
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001011 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1012 req.idiag_ext = rc->idiag_ext;
1013 req.idiag_states = rc->idiag_states;
1014 req.id = rc->id;
1015
1016 if (nlmsg_attrlen(cb->nlh, hdrlen))
1017 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1018
1019 return __inet_diag_dump(skb, cb, &req, bc);
1020}
1021
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001022static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
1023 const struct nlmsghdr *nlh)
1024{
David S. Millerd1063522012-06-26 21:28:54 -07001025 struct inet_diag_req *rc = nlmsg_data(nlh);
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001026 struct inet_diag_req_v2 req;
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001027
1028 req.sdiag_family = rc->idiag_family;
1029 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1030 req.idiag_ext = rc->idiag_ext;
1031 req.idiag_states = rc->idiag_states;
1032 req.id = rc->id;
1033
1034 return inet_diag_get_exact(in_skb, nlh, &req);
1035}
1036
Pavel Emelyanov8d341722011-12-06 07:57:06 +00001037static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038{
Pavel Emelyanov3b09c842012-01-10 22:37:26 +00001039 int hdrlen = sizeof(struct inet_diag_req);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001040 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Thomas Grafead592b2007-03-22 23:30:35 -07001042 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1043 nlmsg_len(nlh) < hdrlen)
1044 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045
David S. Millerb8f3ab42011-01-18 12:40:38 -08001046 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -07001047 if (nlmsg_attrlen(nlh, hdrlen)) {
1048 struct nlattr *attr;
1049
1050 attr = nlmsg_find_attr(nlh, hdrlen,
1051 INET_DIAG_REQ_BYTECODE);
1052 if (attr == NULL ||
1053 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1054 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1055 return -EINVAL;
1056 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001057 {
1058 struct netlink_dump_control c = {
1059 .dump = inet_diag_dump_compat,
1060 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001061 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001062 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 }
Thomas Grafead592b2007-03-22 23:30:35 -07001064
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001065 return inet_diag_get_exact_compat(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066}
1067
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001068static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
1069{
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001070 int hdrlen = sizeof(struct inet_diag_req_v2);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001071 struct net *net = sock_net(skb->sk);
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001072
1073 if (nlmsg_len(h) < hdrlen)
1074 return -EINVAL;
1075
1076 if (h->nlmsg_flags & NLM_F_DUMP) {
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001077 if (nlmsg_attrlen(h, hdrlen)) {
1078 struct nlattr *attr;
1079 attr = nlmsg_find_attr(h, hdrlen,
1080 INET_DIAG_REQ_BYTECODE);
1081 if (attr == NULL ||
1082 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1083 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1084 return -EINVAL;
1085 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001086 {
1087 struct netlink_dump_control c = {
1088 .dump = inet_diag_dump,
1089 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001090 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001091 }
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001092 }
1093
David S. Millerd1063522012-06-26 21:28:54 -07001094 return inet_diag_get_exact(skb, h, nlmsg_data(h));
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001095}
1096
Shan Wei8dcf01f2012-04-24 18:21:07 +00001097static const struct sock_diag_handler inet_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001098 .family = AF_INET,
1099 .dump = inet_diag_handler_dump,
1100};
1101
Shan Wei8dcf01f2012-04-24 18:21:07 +00001102static const struct sock_diag_handler inet6_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001103 .family = AF_INET6,
1104 .dump = inet_diag_handler_dump,
1105};
1106
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001107int inet_diag_register(const struct inet_diag_handler *h)
1108{
1109 const __u16 type = h->idiag_type;
1110 int err = -EINVAL;
1111
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001112 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001113 goto out;
1114
Herbert Xud523a322007-12-03 15:51:25 +11001115 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001116 err = -EEXIST;
1117 if (inet_diag_table[type] == NULL) {
1118 inet_diag_table[type] = h;
1119 err = 0;
1120 }
Herbert Xud523a322007-12-03 15:51:25 +11001121 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001122out:
1123 return err;
1124}
1125EXPORT_SYMBOL_GPL(inet_diag_register);
1126
1127void inet_diag_unregister(const struct inet_diag_handler *h)
1128{
1129 const __u16 type = h->idiag_type;
1130
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001131 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001132 return;
1133
Herbert Xud523a322007-12-03 15:51:25 +11001134 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001135 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +11001136 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001137}
1138EXPORT_SYMBOL_GPL(inet_diag_unregister);
1139
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001140static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001142 const int inet_diag_table_size = (IPPROTO_MAX *
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001143 sizeof(struct inet_diag_handler *));
1144 int err = -ENOMEM;
1145
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001146 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001147 if (!inet_diag_table)
1148 goto out;
1149
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001150 err = sock_diag_register(&inet_diag_handler);
1151 if (err)
1152 goto out_free_nl;
1153
1154 err = sock_diag_register(&inet6_diag_handler);
1155 if (err)
1156 goto out_free_inet;
1157
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001158 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001159out:
1160 return err;
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001161
1162out_free_inet:
1163 sock_diag_unregister(&inet_diag_handler);
1164out_free_nl:
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001165 kfree(inet_diag_table);
1166 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167}
1168
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001169static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170{
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001171 sock_diag_unregister(&inet6_diag_handler);
1172 sock_diag_unregister(&inet_diag_handler);
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001173 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001174 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175}
1176
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001177module_init(inet_diag_init);
1178module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179MODULE_LICENSE("GPL");
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +00001180MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1181MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);