blob: e4d16fc5bbb3fec077f8e3bb3ff8811a66046edc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03002 * inet_diag.c Module for monitoring INET transport protocols sockets.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
Ilpo Järvinen172589c2007-08-28 15:50:33 -070012#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/module.h>
14#include <linux/types.h>
15#include <linux/fcntl.h>
16#include <linux/random.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/cache.h>
19#include <linux/init.h>
20#include <linux/time.h>
21
22#include <net/icmp.h>
23#include <net/tcp.h>
24#include <net/ipv6.h>
25#include <net/inet_common.h>
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -030026#include <net/inet_connection_sock.h>
27#include <net/inet_hashtables.h>
28#include <net/inet_timewait_sock.h>
29#include <net/inet6_hashtables.h>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070030#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32#include <linux/inet.h>
33#include <linux/stddef.h>
34
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -030035#include <linux/inet_diag.h>
Pavel Emelyanovd3664772011-12-06 07:58:03 +000036#include <linux/sock_diag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030038static const struct inet_diag_handler **inet_diag_table;
39
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030040struct inet_diag_entry {
Eric Dumazete31c5e02015-03-10 07:15:53 -070041 const __be32 *saddr;
42 const __be32 *daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 u16 sport;
44 u16 dport;
45 u16 family;
46 u16 userlocks;
David Ahern637c8412016-06-23 18:42:51 -070047 u32 ifindex;
Lorenzo Colittia52e95a2016-08-24 15:46:26 +090048 u32 mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049};
50
Herbert Xud523a322007-12-03 15:51:25 +110051static DEFINE_MUTEX(inet_diag_table_mutex);
52
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000053static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
Herbert Xud523a322007-12-03 15:51:25 +110054{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000055 if (!inet_diag_table[proto])
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +000056 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
57 NETLINK_SOCK_DIAG, AF_INET, proto);
Herbert Xud523a322007-12-03 15:51:25 +110058
59 mutex_lock(&inet_diag_table_mutex);
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000060 if (!inet_diag_table[proto])
Herbert Xud523a322007-12-03 15:51:25 +110061 return ERR_PTR(-ENOENT);
62
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000063 return inet_diag_table[proto];
Herbert Xud523a322007-12-03 15:51:25 +110064}
65
Eric Dumazete31c5e02015-03-10 07:15:53 -070066static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
Herbert Xud523a322007-12-03 15:51:25 +110067{
68 mutex_unlock(&inet_diag_table_mutex);
69}
70
Xin Longcb2050a2016-04-14 15:35:32 +080071void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk)
Eric Dumazeta4458342015-03-13 15:51:12 -070072{
73 r->idiag_family = sk->sk_family;
74
75 r->id.idiag_sport = htons(sk->sk_num);
76 r->id.idiag_dport = sk->sk_dport;
77 r->id.idiag_if = sk->sk_bound_dev_if;
78 sock_diag_save_cookie(sk, r->id.idiag_cookie);
79
80#if IS_ENABLED(CONFIG_IPV6)
81 if (sk->sk_family == AF_INET6) {
82 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
83 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
84 } else
85#endif
86 {
87 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
88 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
89
90 r->id.idiag_src[0] = sk->sk_rcv_saddr;
91 r->id.idiag_dst[0] = sk->sk_daddr;
92 }
93}
Xin Longcb2050a2016-04-14 15:35:32 +080094EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill);
Eric Dumazeta4458342015-03-13 15:51:12 -070095
Eric Dumazetc8e2c802015-03-13 09:49:59 -070096static size_t inet_sk_attr_size(void)
97{
98 return nla_total_size(sizeof(struct tcp_info))
99 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
100 + nla_total_size(1) /* INET_DIAG_TOS */
101 + nla_total_size(1) /* INET_DIAG_TCLASS */
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900102 + nla_total_size(4) /* INET_DIAG_MARK */
Eric Dumazetc8e2c802015-03-13 09:49:59 -0700103 + nla_total_size(sizeof(struct inet_diag_meminfo))
104 + nla_total_size(sizeof(struct inet_diag_msg))
105 + nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
106 + nla_total_size(TCP_CA_NAME_MAX)
107 + nla_total_size(sizeof(struct tcpvegas_info))
108 + 64;
109}
110
Xin Longcb2050a2016-04-14 15:35:32 +0800111int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
112 struct inet_diag_msg *r, int ext,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900113 struct user_namespace *user_ns,
114 bool net_admin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700116 const struct inet_sock *inet = inet_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Pavel Emelyanove4e541a2012-10-23 22:29:56 +0400118 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
119 goto errout;
120
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500121 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
122 * hence this needs to be included regardless of socket family.
123 */
124 if (ext & (1 << (INET_DIAG_TOS - 1)))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000125 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
126 goto errout;
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500127
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000128#if IS_ENABLED(CONFIG_IPV6)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300129 if (r->idiag_family == AF_INET6) {
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;
Phil Sutter20462152015-06-24 11:02:51 +0200134
Phil Sutter8220ea22015-07-10 11:39:57 +0200135 if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
136 nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
Phil Sutter20462152015-06-24 11:02:51 +0200137 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 }
139#endif
140
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900141 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark))
142 goto errout;
143
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600144 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000145 r->idiag_inode = sock_i_ino(sk);
146
Xin Longcb2050a2016-04-14 15:35:32 +0800147 return 0;
148errout:
149 return 1;
150}
151EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill);
152
153int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
154 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
155 struct user_namespace *user_ns,
156 u32 portid, u32 seq, u16 nlmsg_flags,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900157 const struct nlmsghdr *unlh,
158 bool net_admin)
Xin Longcb2050a2016-04-14 15:35:32 +0800159{
160 const struct tcp_congestion_ops *ca_ops;
161 const struct inet_diag_handler *handler;
162 int ext = req->idiag_ext;
163 struct inet_diag_msg *r;
164 struct nlmsghdr *nlh;
165 struct nlattr *attr;
166 void *info = NULL;
167
168 handler = inet_diag_table[req->sdiag_protocol];
169 BUG_ON(!handler);
170
171 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
172 nlmsg_flags);
173 if (!nlh)
174 return -EMSGSIZE;
175
176 r = nlmsg_data(nlh);
177 BUG_ON(!sk_fullsock(sk));
178
179 inet_diag_msg_common_fill(r, sk);
180 r->idiag_state = sk->sk_state;
181 r->idiag_timer = 0;
182 r->idiag_retrans = 0;
183
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900184 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin))
Xin Longcb2050a2016-04-14 15:35:32 +0800185 goto errout;
186
Thomas Graf6e277ed2012-06-26 23:36:12 +0000187 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
188 struct inet_diag_meminfo minfo = {
189 .idiag_rmem = sk_rmem_alloc_get(sk),
190 .idiag_wmem = sk->sk_wmem_queued,
191 .idiag_fmem = sk->sk_forward_alloc,
192 .idiag_tmem = sk_wmem_alloc_get(sk),
193 };
194
195 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
196 goto errout;
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000197 }
198
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000199 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
200 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
Thomas Graf6e277ed2012-06-26 23:36:12 +0000201 goto errout;
Pavel Emelyanovc0636fa2011-12-30 00:53:32 +0000202
Eric Dumazete31c5e02015-03-10 07:15:53 -0700203 if (!icsk) {
Shan Wei62ad6fc2012-04-24 18:15:41 +0000204 handler->idiag_get_info(sk, r, NULL);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000205 goto out;
206 }
207
Nandita Dukkipati6ba8a3b2013-03-11 10:00:43 +0000208 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
209 icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
210 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300211 r->idiag_timer = 1;
212 r->idiag_retrans = icsk->icsk_retransmits;
Xin Longb7de5292016-04-19 15:10:01 +0800213 r->idiag_expires =
214 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700215 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300216 r->idiag_timer = 4;
217 r->idiag_retrans = icsk->icsk_probes_out;
Xin Longb7de5292016-04-19 15:10:01 +0800218 r->idiag_expires =
219 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300221 r->idiag_timer = 2;
222 r->idiag_retrans = icsk->icsk_probes_out;
Xin Longb7de5292016-04-19 15:10:01 +0800223 r->idiag_expires =
224 jiffies_to_msecs(sk->sk_timer.expires - jiffies);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300226 r->idiag_timer = 0;
227 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 }
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300229
Craig Gallek3fd22af2015-06-15 11:26:19 -0400230 if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
Nicolas Dichtel6ed46d12016-04-26 10:06:14 +0200231 attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
232 handler->idiag_info_size,
233 INET_DIAG_PAD);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000234 if (!attr)
235 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Thomas Graf6e277ed2012-06-26 23:36:12 +0000237 info = nla_data(attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
239
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700240 if (ext & (1 << (INET_DIAG_CONG - 1))) {
241 int err = 0;
242
243 rcu_read_lock();
244 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
245 if (ca_ops)
246 err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name);
247 rcu_read_unlock();
248 if (err < 0)
Thomas Graf6e277ed2012-06-26 23:36:12 +0000249 goto errout;
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700250 }
Thomas Graf6e277ed2012-06-26 23:36:12 +0000251
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300252 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700254 if (sk->sk_state < TCP_TIME_WAIT) {
Eric Dumazet64f40ff2015-04-28 16:23:48 -0700255 union tcp_cc_info info;
256 size_t sz = 0;
257 int attr;
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700258
259 rcu_read_lock();
260 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
261 if (ca_ops && ca_ops->get_info)
Eric Dumazet64f40ff2015-04-28 16:23:48 -0700262 sz = ca_ops->get_info(sk, ext, &attr, &info);
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700263 rcu_read_unlock();
Eric Dumazet64f40ff2015-04-28 16:23:48 -0700264 if (sz && nla_put(skb, attr, sz, &info) < 0)
Eric Dumazet521f1cf2015-04-16 18:10:35 -0700265 goto errout;
266 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000268out:
Johannes Berg053c0952015-01-16 22:09:00 +0100269 nlmsg_end(skb, nlh);
270 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Thomas Graf6e277ed2012-06-26 23:36:12 +0000272errout:
273 nlmsg_cancel(skb, nlh);
Patrick McHardy26932562007-01-31 23:16:40 -0800274 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275}
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000276EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
277
278static int inet_csk_diag_fill(struct sock *sk,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700279 struct sk_buff *skb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700280 const struct inet_diag_req_v2 *req,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600281 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000282 u32 portid, u32 seq, u16 nlmsg_flags,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900283 const struct nlmsghdr *unlh,
284 bool net_admin)
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000285{
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900286 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, user_ns,
287 portid, seq, nlmsg_flags, unlh, net_admin);
Pavel Emelyanov3c4d05c2011-12-09 06:23:00 +0000288}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700290static int inet_twsk_diag_fill(struct sock *sk,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700291 struct sk_buff *skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000292 u32 portid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800293 const struct nlmsghdr *unlh)
294{
Eric Dumazet33cf7c92015-03-11 18:53:14 -0700295 struct inet_timewait_sock *tw = inet_twsk(sk);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800296 struct inet_diag_msg *r;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000297 struct nlmsghdr *nlh;
Eric Dumazet789f5582015-04-12 18:51:09 -0700298 long tmo;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800299
Eric W. Biederman15e47302012-09-07 20:12:54 +0000300 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
Thomas Graf6e277ed2012-06-26 23:36:12 +0000301 nlmsg_flags);
302 if (!nlh)
David S. Millerd1063522012-06-26 21:28:54 -0700303 return -EMSGSIZE;
David S. Millerd1063522012-06-26 21:28:54 -0700304
305 r = nlmsg_data(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800306 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
307
Eric Dumazet789f5582015-04-12 18:51:09 -0700308 tmo = tw->tw_timer.expires - jiffies;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800309 if (tmo < 0)
310 tmo = 0;
311
Eric Dumazeta4458342015-03-13 15:51:12 -0700312 inet_diag_msg_common_fill(r, sk);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800313 r->idiag_retrans = 0;
Daniel Borkmannb1aac812013-12-17 00:38:39 +0100314
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800315 r->idiag_state = tw->tw_substate;
316 r->idiag_timer = 3;
Eric Dumazet96f817f2013-10-03 14:27:25 -0700317 r->idiag_expires = jiffies_to_msecs(tmo);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800318 r->idiag_rqueue = 0;
319 r->idiag_wqueue = 0;
320 r->idiag_uid = 0;
321 r->idiag_inode = 0;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000322
Johannes Berg053c0952015-01-16 22:09:00 +0100323 nlmsg_end(skb, nlh);
324 return 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800325}
326
Eric Dumazeta58917f2015-03-15 21:12:14 -0700327static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb,
328 u32 portid, u32 seq, u16 nlmsg_flags,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900329 const struct nlmsghdr *unlh, bool net_admin)
Eric Dumazeta58917f2015-03-15 21:12:14 -0700330{
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900331 struct request_sock *reqsk = inet_reqsk(sk);
Eric Dumazeta58917f2015-03-15 21:12:14 -0700332 struct inet_diag_msg *r;
333 struct nlmsghdr *nlh;
334 long tmo;
335
336 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
337 nlmsg_flags);
338 if (!nlh)
339 return -EMSGSIZE;
340
341 r = nlmsg_data(nlh);
342 inet_diag_msg_common_fill(r, sk);
343 r->idiag_state = TCP_SYN_RECV;
344 r->idiag_timer = 1;
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900345 r->idiag_retrans = reqsk->num_retrans;
Eric Dumazeta58917f2015-03-15 21:12:14 -0700346
347 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
348 offsetof(struct sock, sk_cookie));
349
Eric Dumazetfa76ce732015-03-19 19:04:20 -0700350 tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies;
Eric Dumazeta58917f2015-03-15 21:12:14 -0700351 r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0;
352 r->idiag_rqueue = 0;
353 r->idiag_wqueue = 0;
354 r->idiag_uid = 0;
355 r->idiag_inode = 0;
356
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900357 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK,
358 inet_rsk(reqsk)->ir_mark))
359 return -EMSGSIZE;
360
Eric Dumazeta58917f2015-03-15 21:12:14 -0700361 nlmsg_end(skb, nlh);
362 return 0;
363}
364
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800365static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700366 const struct inet_diag_req_v2 *r,
Eric W. Biedermand06ca952012-05-24 17:58:08 -0600367 struct user_namespace *user_ns,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000368 u32 portid, u32 seq, u16 nlmsg_flags,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900369 const struct nlmsghdr *unlh, bool net_admin)
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800370{
371 if (sk->sk_state == TCP_TIME_WAIT)
Eric Dumazeta58917f2015-03-15 21:12:14 -0700372 return inet_twsk_diag_fill(sk, skb, portid, seq,
Eric Dumazetefe42082013-10-03 15:42:29 -0700373 nlmsg_flags, unlh);
374
Eric Dumazeta58917f2015-03-15 21:12:14 -0700375 if (sk->sk_state == TCP_NEW_SYN_RECV)
376 return inet_req_diag_fill(sk, skb, portid, seq,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900377 nlmsg_flags, unlh, net_admin);
Eric Dumazeta58917f2015-03-15 21:12:14 -0700378
Eric Dumazetefe42082013-10-03 15:42:29 -0700379 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900380 nlmsg_flags, unlh, net_admin);
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800381}
382
Lorenzo Colittib613f562015-12-16 12:30:02 +0900383struct sock *inet_diag_find_one_icsk(struct net *net,
384 struct inet_hashinfo *hashinfo,
385 const struct inet_diag_req_v2 *req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386{
Eric Dumazete31c5e02015-03-10 07:15:53 -0700387 struct sock *sk;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300388
Eric Dumazet2d331912016-04-01 08:52:15 -0700389 rcu_read_lock();
Eric Dumazete31c5e02015-03-10 07:15:53 -0700390 if (req->sdiag_family == AF_INET)
Craig Galleka5836362016-02-10 11:50:38 -0500391 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0],
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300392 req->id.idiag_dport, req->id.idiag_src[0],
393 req->id.idiag_sport, req->id.idiag_if);
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000394#if IS_ENABLED(CONFIG_IPV6)
Eric Dumazet7c130672016-01-20 16:25:01 -0800395 else if (req->sdiag_family == AF_INET6) {
396 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
397 ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
Craig Galleka5836362016-02-10 11:50:38 -0500398 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3],
Eric Dumazet7c130672016-01-20 16:25:01 -0800399 req->id.idiag_dport, req->id.idiag_src[3],
400 req->id.idiag_sport, req->id.idiag_if);
401 else
Craig Galleka5836362016-02-10 11:50:38 -0500402 sk = inet6_lookup(net, hashinfo, NULL, 0,
Eric Dumazet7c130672016-01-20 16:25:01 -0800403 (struct in6_addr *)req->id.idiag_dst,
404 req->id.idiag_dport,
405 (struct in6_addr *)req->id.idiag_src,
406 req->id.idiag_sport,
407 req->id.idiag_if);
408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409#endif
Eric Dumazet2d331912016-04-01 08:52:15 -0700410 else {
411 rcu_read_unlock();
Lorenzo Colittib613f562015-12-16 12:30:02 +0900412 return ERR_PTR(-EINVAL);
Eric Dumazet2d331912016-04-01 08:52:15 -0700413 }
414 rcu_read_unlock();
Eric Dumazete31c5e02015-03-10 07:15:53 -0700415 if (!sk)
Lorenzo Colittib613f562015-12-16 12:30:02 +0900416 return ERR_PTR(-ENOENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Lorenzo Colittib613f562015-12-16 12:30:02 +0900418 if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
419 sock_gen_put(sk);
420 return ERR_PTR(-ENOENT);
421 }
422
423 return sk;
424}
425EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
426
427int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
428 struct sk_buff *in_skb,
429 const struct nlmsghdr *nlh,
430 const struct inet_diag_req_v2 *req)
431{
432 struct net *net = sock_net(in_skb->sk);
433 struct sk_buff *rep;
434 struct sock *sk;
435 int err;
436
437 sk = inet_diag_find_one_icsk(net, hashinfo, req);
438 if (IS_ERR(sk))
439 return PTR_ERR(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Eric Dumazetc8e2c802015-03-13 09:49:59 -0700441 rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000442 if (!rep) {
443 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 goto out;
Thomas Graf6e277ed2012-06-26 23:36:12 +0000445 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000447 err = sk_diag_fill(sk, rep, req,
Patrick McHardye32123e2013-04-17 06:46:57 +0000448 sk_user_ns(NETLINK_CB(in_skb).sk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000449 NETLINK_CB(in_skb).portid,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900450 nlh->nlmsg_seq, 0, nlh,
451 netlink_net_capable(in_skb, CAP_NET_ADMIN));
Patrick McHardy26932562007-01-31 23:16:40 -0800452 if (err < 0) {
453 WARN_ON(err == -EMSGSIZE);
Thomas Graf6e277ed2012-06-26 23:36:12 +0000454 nlmsg_free(rep);
Patrick McHardy26932562007-01-31 23:16:40 -0800455 goto out;
456 }
Eric W. Biederman15e47302012-09-07 20:12:54 +0000457 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300458 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 if (err > 0)
460 err = 0;
461
462out:
Eric Dumazetc1d607c2013-10-11 08:54:49 -0700463 if (sk)
464 sock_gen_put(sk);
465
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000466 return err;
467}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000468EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000469
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900470static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000471 const struct nlmsghdr *nlh,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700472 const struct inet_diag_req_v2 *req)
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000473{
474 const struct inet_diag_handler *handler;
475 int err;
476
477 handler = inet_diag_lock_handler(req->sdiag_protocol);
478 if (IS_ERR(handler))
479 err = PTR_ERR(handler);
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900480 else if (cmd == SOCK_DIAG_BY_FAMILY)
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000481 err = handler->dump_one(in_skb, nlh, req);
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +0900482 else if (cmd == SOCK_DESTROY && handler->destroy)
483 err = handler->destroy(in_skb, req);
484 else
485 err = -EOPNOTSUPP;
Herbert Xud523a322007-12-03 15:51:25 +1100486 inet_diag_unlock_handler(handler);
Pavel Emelyanov476f7db2011-12-09 06:22:10 +0000487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 return err;
489}
490
Al Viro9f855292006-09-27 18:44:30 -0700491static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
493 int words = bits >> 5;
494
495 bits &= 0x1f;
496
497 if (words) {
498 if (memcmp(a1, a2, words << 2))
499 return 0;
500 }
501 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700502 __be32 w1, w2;
503 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
505 w1 = a1[words];
506 w2 = a2[words];
507
508 mask = htonl((0xffffffff) << (32 - bits));
509
510 if ((w1 ^ w2) & mask)
511 return 0;
512 }
513
514 return 1;
515}
516
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000517static int inet_diag_bc_run(const struct nlattr *_bc,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700518 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Pavel Emelyanov87c22ea2011-12-09 06:21:34 +0000520 const void *bc = nla_data(_bc);
521 int len = nla_len(_bc);
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 while (len > 0) {
524 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300525 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
527 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300528 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300530 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 yes = 0;
532 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300533 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 yes = entry->sport >= op[1].no;
535 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300536 case INET_DIAG_BC_S_LE:
Roel Kluinb4ced2b2010-01-19 14:12:20 -0800537 yes = entry->sport <= op[1].no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300539 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 yes = entry->dport >= op[1].no;
541 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300542 case INET_DIAG_BC_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 yes = entry->dport <= op[1].no;
544 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300545 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
547 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300548 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300549 case INET_DIAG_BC_D_COND: {
Eric Dumazete31c5e02015-03-10 07:15:53 -0700550 const struct inet_diag_hostcond *cond;
551 const __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Eric Dumazete31c5e02015-03-10 07:15:53 -0700553 cond = (const struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300555 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 entry->sport : entry->dport)) {
557 yes = 0;
558 break;
559 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800560
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300561 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 addr = entry->saddr;
563 else
564 addr = entry->daddr;
565
Neal Cardwellf67caec2012-12-08 19:43:23 +0000566 if (cond->family != AF_UNSPEC &&
567 cond->family != entry->family) {
568 if (entry->family == AF_INET6 &&
569 cond->family == AF_INET) {
570 if (addr[0] == 0 && addr[1] == 0 &&
571 addr[2] == htonl(0xffff) &&
572 bitstring_match(addr + 3,
573 cond->addr,
574 cond->prefix_len))
575 break;
576 }
577 yes = 0;
578 break;
579 }
580
581 if (cond->prefix_len == 0)
582 break;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800583 if (bitstring_match(addr, cond->addr,
584 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 yes = 0;
587 break;
588 }
David Ahern637c8412016-06-23 18:42:51 -0700589 case INET_DIAG_BC_DEV_COND: {
590 u32 ifindex;
591
592 ifindex = *((const u32 *)(op + 1));
593 if (ifindex != entry->ifindex)
594 yes = 0;
595 break;
596 }
Lorenzo Colittia52e95a2016-08-24 15:46:26 +0900597 case INET_DIAG_BC_MARK_COND: {
598 struct inet_diag_markcond *cond;
599
600 cond = (struct inet_diag_markcond *)(op + 1);
601 if ((entry->mark & cond->mask) != cond->mark)
602 yes = 0;
603 break;
604 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 }
606
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800607 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 len -= op->yes;
609 bc += op->yes;
610 } else {
611 len -= op->no;
612 bc += op->no;
613 }
614 }
Eric Dumazeta02cec22010-09-22 20:43:57 +0000615 return len == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616}
617
Eric Dumazeta4458342015-03-13 15:51:12 -0700618/* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
619 */
620static void entry_fill_addrs(struct inet_diag_entry *entry,
621 const struct sock *sk)
622{
623#if IS_ENABLED(CONFIG_IPV6)
624 if (sk->sk_family == AF_INET6) {
625 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32;
626 entry->daddr = sk->sk_v6_daddr.s6_addr32;
627 } else
628#endif
629 {
630 entry->saddr = &sk->sk_rcv_saddr;
631 entry->daddr = &sk->sk_daddr;
632 }
633}
634
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000635int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
636{
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000637 struct inet_sock *inet = inet_sk(sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700638 struct inet_diag_entry entry;
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000639
Eric Dumazete31c5e02015-03-10 07:15:53 -0700640 if (!bc)
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000641 return 1;
642
643 entry.family = sk->sk_family;
Eric Dumazeta4458342015-03-13 15:51:12 -0700644 entry_fill_addrs(&entry, sk);
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000645 entry.sport = inet->inet_num;
646 entry.dport = ntohs(inet->inet_dport);
David Ahern637c8412016-06-23 18:42:51 -0700647 entry.ifindex = sk->sk_bound_dev_if;
Eric Dumazeta58917f2015-03-15 21:12:14 -0700648 entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0;
Lorenzo Colittia52e95a2016-08-24 15:46:26 +0900649 if (sk_fullsock(sk))
650 entry.mark = sk->sk_mark;
651 else if (sk->sk_state == TCP_NEW_SYN_RECV)
652 entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark;
653 else
654 entry.mark = 0;
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000655
656 return inet_diag_bc_run(bc, &entry);
657}
658EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
659
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660static int valid_cc(const void *bc, int len, int cc)
661{
662 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300663 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
665 if (cc > len)
666 return 0;
667 if (cc == len)
668 return 1;
Eric Dumazeteeb14972011-06-17 16:25:39 -0400669 if (op->yes < 4 || op->yes & 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 return 0;
671 len -= op->yes;
672 bc += op->yes;
673 }
674 return 0;
675}
676
David Ahern637c8412016-06-23 18:42:51 -0700677/* data is u32 ifindex */
678static bool valid_devcond(const struct inet_diag_bc_op *op, int len,
679 int *min_len)
680{
681 /* Check ifindex space. */
682 *min_len += sizeof(u32);
683 if (len < *min_len)
684 return false;
685
686 return true;
687}
Neal Cardwell405c0052012-12-08 19:43:22 +0000688/* Validate an inet_diag_hostcond. */
689static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
690 int *min_len)
691{
Neal Cardwell405c0052012-12-08 19:43:22 +0000692 struct inet_diag_hostcond *cond;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700693 int addr_len;
Neal Cardwell405c0052012-12-08 19:43:22 +0000694
695 /* Check hostcond space. */
696 *min_len += sizeof(struct inet_diag_hostcond);
697 if (len < *min_len)
698 return false;
699 cond = (struct inet_diag_hostcond *)(op + 1);
700
701 /* Check address family and address length. */
702 switch (cond->family) {
703 case AF_UNSPEC:
704 addr_len = 0;
705 break;
706 case AF_INET:
707 addr_len = sizeof(struct in_addr);
708 break;
709 case AF_INET6:
710 addr_len = sizeof(struct in6_addr);
711 break;
712 default:
713 return false;
714 }
715 *min_len += addr_len;
716 if (len < *min_len)
717 return false;
718
719 /* Check prefix length (in bits) vs address length (in bytes). */
720 if (cond->prefix_len > 8 * addr_len)
721 return false;
722
723 return true;
724}
725
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000726/* Validate a port comparison operator. */
Eric Dumazete31c5e02015-03-10 07:15:53 -0700727static bool valid_port_comparison(const struct inet_diag_bc_op *op,
728 int len, int *min_len)
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000729{
730 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
731 *min_len += sizeof(struct inet_diag_bc_op);
732 if (len < *min_len)
733 return false;
734 return true;
735}
736
Lorenzo Colittia52e95a2016-08-24 15:46:26 +0900737static bool valid_markcond(const struct inet_diag_bc_op *op, int len,
738 int *min_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739{
Lorenzo Colittia52e95a2016-08-24 15:46:26 +0900740 *min_len += sizeof(struct inet_diag_markcond);
741 return len >= *min_len;
742}
743
744static int inet_diag_bc_audit(const struct nlattr *attr,
745 const struct sk_buff *skb)
746{
747 bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN);
Lorenzo Colitti627cc4a2016-08-24 15:46:25 +0900748 const void *bytecode, *bc;
749 int bytecode_len, len;
750
751 if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op))
752 return -EINVAL;
753
754 bytecode = bc = nla_data(attr);
755 len = bytecode_len = nla_len(attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756
757 while (len > 0) {
Neal Cardwell405c0052012-12-08 19:43:22 +0000758 int min_len = sizeof(struct inet_diag_bc_op);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700759 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300762 case INET_DIAG_BC_S_COND:
763 case INET_DIAG_BC_D_COND:
Neal Cardwell405c0052012-12-08 19:43:22 +0000764 if (!valid_hostcond(bc, len, &min_len))
765 return -EINVAL;
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000766 break;
David Ahern637c8412016-06-23 18:42:51 -0700767 case INET_DIAG_BC_DEV_COND:
768 if (!valid_devcond(bc, len, &min_len))
769 return -EINVAL;
770 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300771 case INET_DIAG_BC_S_GE:
772 case INET_DIAG_BC_S_LE:
773 case INET_DIAG_BC_D_GE:
774 case INET_DIAG_BC_D_LE:
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000775 if (!valid_port_comparison(bc, len, &min_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 return -EINVAL;
777 break;
Lorenzo Colittia52e95a2016-08-24 15:46:26 +0900778 case INET_DIAG_BC_MARK_COND:
779 if (!net_admin)
780 return -EPERM;
781 if (!valid_markcond(bc, len, &min_len))
782 return -EINVAL;
783 break;
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000784 case INET_DIAG_BC_AUTO:
785 case INET_DIAG_BC_JMP:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300786 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 break;
788 default:
789 return -EINVAL;
790 }
Neal Cardwell5e1f5422012-12-09 11:09:54 +0000791
792 if (op->code != INET_DIAG_BC_NOP) {
793 if (op->no < min_len || op->no > len + 4 || op->no & 3)
794 return -EINVAL;
795 if (op->no < len &&
796 !valid_cc(bytecode, bytecode_len, len - op->no))
797 return -EINVAL;
798 }
799
Neal Cardwell405c0052012-12-08 19:43:22 +0000800 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
Eric Dumazeteeb14972011-06-17 16:25:39 -0400801 return -EINVAL;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800802 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 len -= op->yes;
804 }
805 return len == 0 ? 0 : -EINVAL;
806}
807
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800808static int inet_csk_diag_dump(struct sock *sk,
809 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000810 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700811 const struct inet_diag_req_v2 *r,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900812 const struct nlattr *bc,
813 bool net_admin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814{
Pavel Emelyanov8d07d152011-12-09 06:22:44 +0000815 if (!inet_diag_bc_sk(bc, sk))
816 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000818 return inet_csk_diag_fill(sk, skb, r,
Patrick McHardye32123e2013-04-17 06:46:57 +0000819 sk_user_ns(NETLINK_CB(cb->skb).sk),
Eric W. Biederman15e47302012-09-07 20:12:54 +0000820 NETLINK_CB(cb->skb).portid,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900821 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh,
822 net_admin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823}
824
Eric Dumazet49612722015-03-05 10:18:14 -0800825static void twsk_build_assert(void)
826{
827 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
828 offsetof(struct sock, sk_family));
829
830 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
831 offsetof(struct inet_sock, inet_num));
832
833 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
834 offsetof(struct inet_sock, inet_dport));
835
836 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
837 offsetof(struct inet_sock, inet_rcv_saddr));
838
839 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
840 offsetof(struct inet_sock, inet_daddr));
841
842#if IS_ENABLED(CONFIG_IPV6)
843 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
844 offsetof(struct sock, sk_v6_rcv_saddr));
845
846 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
847 offsetof(struct sock, sk_v6_daddr));
848#endif
849}
850
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000851void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700852 struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700853 const struct inet_diag_req_v2 *r, struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854{
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000855 struct net *net = sock_net(skb->sk);
Eric Dumazete31c5e02015-03-10 07:15:53 -0700856 int i, num, s_i, s_num;
Eric Dumazet079096f2015-10-02 11:43:32 -0700857 u32 idiag_states = r->idiag_states;
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900858 bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800859
Eric Dumazet079096f2015-10-02 11:43:32 -0700860 if (idiag_states & TCPF_SYN_RECV)
861 idiag_states |= TCPF_NEW_SYN_RECV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 s_i = cb->args[1];
863 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 if (cb->args[0] == 0) {
Eric Dumazet079096f2015-10-02 11:43:32 -0700866 if (!(idiag_states & TCPF_LISTEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300868
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700869 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800870 struct inet_listen_hashbucket *ilb;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700871 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
873 num = 0;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800874 ilb = &hashinfo->listening_hash[i];
875 spin_lock_bh(&ilb->lock);
Eric Dumazet3b24d852016-04-01 08:52:17 -0700876 sk_for_each(sk, &ilb->head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 struct inet_sock *inet = inet_sk(sk);
878
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000879 if (!net_eq(sock_net(sk), net))
880 continue;
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 if (num < s_num) {
883 num++;
884 continue;
885 }
886
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000887 if (r->sdiag_family != AF_UNSPEC &&
Eric Dumazete31c5e02015-03-10 07:15:53 -0700888 sk->sk_family != r->sdiag_family)
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000889 goto next_listen;
890
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000891 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300892 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 goto next_listen;
894
Eric Dumazet079096f2015-10-02 11:43:32 -0700895 if (r->id.idiag_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 cb->args[3] > 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 goto next_listen;
898
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900899 if (inet_csk_diag_dump(sk, skb, cb, r,
900 bc, net_admin) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800901 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 goto done;
903 }
904
905next_listen:
906 cb->args[3] = 0;
907 cb->args[4] = 0;
908 ++num;
909 }
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800910 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
912 s_num = 0;
913 cb->args[3] = 0;
914 cb->args[4] = 0;
915 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916skip_listen_ht:
917 cb->args[0] = 1;
918 s_i = num = s_num = 0;
919 }
920
Eric Dumazet079096f2015-10-02 11:43:32 -0700921 if (!(idiag_states & ~TCPF_LISTEN))
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000922 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
Eric Dumazetf373b532009-10-09 00:16:19 +0000924 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300925 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
David S. Miller7e3aab42008-11-21 16:39:19 -0800926 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800927 struct hlist_nulls_node *node;
Eric Dumazete31c5e02015-03-10 07:15:53 -0700928 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Andi Kleen6be547a2008-08-28 01:09:54 -0700930 num = 0;
931
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700932 if (hlist_nulls_empty(&head->chain))
Andi Kleen6be547a2008-08-28 01:09:54 -0700933 continue;
934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 if (i > s_i)
936 s_num = 0;
937
David S. Miller7e3aab42008-11-21 16:39:19 -0800938 spin_lock_bh(lock);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800939 sk_nulls_for_each(sk, node, &head->chain) {
Eric Dumazete31c5e02015-03-10 07:15:53 -0700940 int state, res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941
Andrey Vagin51d7ccc2012-07-16 04:28:49 +0000942 if (!net_eq(sock_net(sk), net))
943 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 if (num < s_num)
945 goto next_normal;
Neal Cardwell70315d22014-01-10 15:34:45 -0500946 state = (sk->sk_state == TCP_TIME_WAIT) ?
947 inet_twsk(sk)->tw_substate : sk->sk_state;
Eric Dumazet079096f2015-10-02 11:43:32 -0700948 if (!(idiag_states & (1 << state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 goto next_normal;
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000950 if (r->sdiag_family != AF_UNSPEC &&
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700951 sk->sk_family != r->sdiag_family)
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000952 goto next_normal;
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700953 if (r->id.idiag_sport != htons(sk->sk_num) &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300954 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 goto next_normal;
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700956 if (r->id.idiag_dport != sk->sk_dport &&
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800957 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 goto next_normal;
Eric Dumazeta58917f2015-03-15 21:12:14 -0700959 twsk_build_assert();
960
961 if (!inet_diag_bc_sk(bc, sk))
962 goto next_normal;
963
964 res = sk_diag_fill(sk, skb, r,
965 sk_user_ns(NETLINK_CB(cb->skb).sk),
966 NETLINK_CB(cb->skb).portid,
967 cb->nlh->nlmsg_seq, NLM_F_MULTI,
Lorenzo Colittid545cac2016-09-08 00:42:25 +0900968 cb->nlh, net_admin);
Eric Dumazet05dbc7b2013-10-03 00:22:02 -0700969 if (res < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800970 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 goto done;
972 }
973next_normal:
974 ++num;
975 }
976
David S. Miller7e3aab42008-11-21 16:39:19 -0800977 spin_unlock_bh(lock);
Eric Dumazetacffb582016-03-14 15:40:00 -0700978 cond_resched();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 }
980
981done:
982 cb->args[1] = i;
983 cb->args[2] = num;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000984out:
985 ;
986}
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000987EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000988
989static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -0700990 const struct inet_diag_req_v2 *r,
Eric Dumazete31c5e02015-03-10 07:15:53 -0700991 struct nlattr *bc)
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000992{
993 const struct inet_diag_handler *handler;
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000994 int err = 0;
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +0000995
996 handler = inet_diag_lock_handler(r->sdiag_protocol);
997 if (!IS_ERR(handler))
Pavel Emelyanov1942c512011-12-09 06:23:18 +0000998 handler->dump(skb, cb, r, bc);
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +0000999 else
1000 err = PTR_ERR(handler);
Herbert Xud523a322007-12-03 15:51:25 +11001001 inet_diag_unlock_handler(handler);
Pavel Emelyanovefb3cb42011-12-09 06:22:26 +00001002
Cyrill Gorcunovcacb6ba2012-11-03 09:30:34 +00001003 return err ? : skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004}
1005
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001006static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
1007{
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001008 int hdrlen = sizeof(struct inet_diag_req_v2);
Eric Dumazete31c5e02015-03-10 07:15:53 -07001009 struct nlattr *bc = NULL;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001010
1011 if (nlmsg_attrlen(cb->nlh, hdrlen))
1012 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1013
David S. Millerd1063522012-06-26 21:28:54 -07001014 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001015}
1016
Eric Dumazete31c5e02015-03-10 07:15:53 -07001017static int inet_diag_type2proto(int type)
Pavel Emelyanova029fe22011-12-06 07:59:32 +00001018{
1019 switch (type) {
1020 case TCPDIAG_GETSOCK:
1021 return IPPROTO_TCP;
1022 case DCCPDIAG_GETSOCK:
1023 return IPPROTO_DCCP;
1024 default:
1025 return 0;
1026 }
1027}
1028
Eric Dumazete31c5e02015-03-10 07:15:53 -07001029static int inet_diag_dump_compat(struct sk_buff *skb,
1030 struct netlink_callback *cb)
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001031{
David S. Millerd1063522012-06-26 21:28:54 -07001032 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
Eric Dumazete31c5e02015-03-10 07:15:53 -07001033 int hdrlen = sizeof(struct inet_diag_req);
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001034 struct inet_diag_req_v2 req;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001035 struct nlattr *bc = NULL;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001036
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +00001037 req.sdiag_family = AF_UNSPEC; /* compatibility */
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001038 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1039 req.idiag_ext = rc->idiag_ext;
1040 req.idiag_states = rc->idiag_states;
1041 req.id = rc->id;
1042
1043 if (nlmsg_attrlen(cb->nlh, hdrlen))
1044 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1045
1046 return __inet_diag_dump(skb, cb, &req, bc);
1047}
1048
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001049static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
Eric Dumazete31c5e02015-03-10 07:15:53 -07001050 const struct nlmsghdr *nlh)
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001051{
David S. Millerd1063522012-06-26 21:28:54 -07001052 struct inet_diag_req *rc = nlmsg_data(nlh);
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001053 struct inet_diag_req_v2 req;
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001054
1055 req.sdiag_family = rc->idiag_family;
1056 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1057 req.idiag_ext = rc->idiag_ext;
1058 req.idiag_states = rc->idiag_states;
1059 req.id = rc->id;
1060
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001061 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001062}
1063
Pavel Emelyanov8d341722011-12-06 07:57:06 +00001064static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065{
Pavel Emelyanov3b09c842012-01-10 22:37:26 +00001066 int hdrlen = sizeof(struct inet_diag_req);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001067 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
Thomas Grafead592b2007-03-22 23:30:35 -07001069 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1070 nlmsg_len(nlh) < hdrlen)
1071 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
David S. Millerb8f3ab42011-01-18 12:40:38 -08001073 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -07001074 if (nlmsg_attrlen(nlh, hdrlen)) {
1075 struct nlattr *attr;
Lorenzo Colitti627cc4a2016-08-24 15:46:25 +09001076 int err;
Thomas Grafead592b2007-03-22 23:30:35 -07001077
1078 attr = nlmsg_find_attr(nlh, hdrlen,
1079 INET_DIAG_REQ_BYTECODE);
Lorenzo Colittia52e95a2016-08-24 15:46:26 +09001080 err = inet_diag_bc_audit(attr, skb);
Lorenzo Colitti627cc4a2016-08-24 15:46:25 +09001081 if (err)
1082 return err;
Thomas Grafead592b2007-03-22 23:30:35 -07001083 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001084 {
1085 struct netlink_dump_control c = {
1086 .dump = inet_diag_dump_compat,
1087 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001088 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001089 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 }
Thomas Grafead592b2007-03-22 23:30:35 -07001091
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +00001092 return inet_diag_get_exact_compat(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093}
1094
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001095static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001096{
Pavel Emelyanovc8991362012-01-10 22:36:35 +00001097 int hdrlen = sizeof(struct inet_diag_req_v2);
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001098 struct net *net = sock_net(skb->sk);
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001099
1100 if (nlmsg_len(h) < hdrlen)
1101 return -EINVAL;
1102
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001103 if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
1104 h->nlmsg_flags & NLM_F_DUMP) {
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001105 if (nlmsg_attrlen(h, hdrlen)) {
1106 struct nlattr *attr;
Lorenzo Colitti627cc4a2016-08-24 15:46:25 +09001107 int err;
Eric Dumazete31c5e02015-03-10 07:15:53 -07001108
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001109 attr = nlmsg_find_attr(h, hdrlen,
1110 INET_DIAG_REQ_BYTECODE);
Lorenzo Colittia52e95a2016-08-24 15:46:26 +09001111 err = inet_diag_bc_audit(attr, skb);
Lorenzo Colitti627cc4a2016-08-24 15:46:25 +09001112 if (err)
1113 return err;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +00001114 }
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001115 {
1116 struct netlink_dump_control c = {
1117 .dump = inet_diag_dump,
1118 };
Andrey Vagin51d7ccc2012-07-16 04:28:49 +00001119 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00001120 }
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001121 }
1122
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001123 return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001124}
1125
Craig Gallek35ac8382015-06-15 11:26:20 -04001126static
1127int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
1128{
1129 const struct inet_diag_handler *handler;
1130 struct nlmsghdr *nlh;
1131 struct nlattr *attr;
1132 struct inet_diag_msg *r;
1133 void *info = NULL;
1134 int err = 0;
1135
1136 nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0);
1137 if (!nlh)
1138 return -ENOMEM;
1139
1140 r = nlmsg_data(nlh);
1141 memset(r, 0, sizeof(*r));
1142 inet_diag_msg_common_fill(r, sk);
Craig Galleke0df02e2015-06-17 10:59:10 -04001143 if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM)
1144 r->id.idiag_sport = inet_sk(sk)->inet_sport;
Craig Gallek35ac8382015-06-15 11:26:20 -04001145 r->idiag_state = sk->sk_state;
1146
1147 if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) {
1148 nlmsg_cancel(skb, nlh);
1149 return err;
1150 }
1151
1152 handler = inet_diag_lock_handler(sk->sk_protocol);
1153 if (IS_ERR(handler)) {
1154 inet_diag_unlock_handler(handler);
1155 nlmsg_cancel(skb, nlh);
1156 return PTR_ERR(handler);
1157 }
1158
1159 attr = handler->idiag_info_size
Nicolas Dichtel6ed46d12016-04-26 10:06:14 +02001160 ? nla_reserve_64bit(skb, INET_DIAG_INFO,
1161 handler->idiag_info_size,
1162 INET_DIAG_PAD)
Craig Gallek35ac8382015-06-15 11:26:20 -04001163 : NULL;
1164 if (attr)
1165 info = nla_data(attr);
1166
1167 handler->idiag_get_info(sk, r, info);
1168 inet_diag_unlock_handler(handler);
1169
1170 nlmsg_end(skb, nlh);
1171 return 0;
1172}
1173
Shan Wei8dcf01f2012-04-24 18:21:07 +00001174static const struct sock_diag_handler inet_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001175 .family = AF_INET,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001176 .dump = inet_diag_handler_cmd,
Craig Gallek35ac8382015-06-15 11:26:20 -04001177 .get_info = inet_diag_handler_get_info,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001178 .destroy = inet_diag_handler_cmd,
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001179};
1180
Shan Wei8dcf01f2012-04-24 18:21:07 +00001181static const struct sock_diag_handler inet6_diag_handler = {
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001182 .family = AF_INET6,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001183 .dump = inet_diag_handler_cmd,
Craig Gallek35ac8382015-06-15 11:26:20 -04001184 .get_info = inet_diag_handler_get_info,
Lorenzo Colitti6eb5d2e2015-12-16 12:30:04 +09001185 .destroy = inet_diag_handler_cmd,
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001186};
1187
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001188int inet_diag_register(const struct inet_diag_handler *h)
1189{
1190 const __u16 type = h->idiag_type;
1191 int err = -EINVAL;
1192
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001193 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001194 goto out;
1195
Herbert Xud523a322007-12-03 15:51:25 +11001196 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001197 err = -EEXIST;
Eric Dumazete31c5e02015-03-10 07:15:53 -07001198 if (!inet_diag_table[type]) {
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001199 inet_diag_table[type] = h;
1200 err = 0;
1201 }
Herbert Xud523a322007-12-03 15:51:25 +11001202 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001203out:
1204 return err;
1205}
1206EXPORT_SYMBOL_GPL(inet_diag_register);
1207
1208void inet_diag_unregister(const struct inet_diag_handler *h)
1209{
1210 const __u16 type = h->idiag_type;
1211
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001212 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001213 return;
1214
Herbert Xud523a322007-12-03 15:51:25 +11001215 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001216 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +11001217 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001218}
1219EXPORT_SYMBOL_GPL(inet_diag_unregister);
1220
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001221static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001223 const int inet_diag_table_size = (IPPROTO_MAX *
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001224 sizeof(struct inet_diag_handler *));
1225 int err = -ENOMEM;
1226
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001227 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001228 if (!inet_diag_table)
1229 goto out;
1230
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001231 err = sock_diag_register(&inet_diag_handler);
1232 if (err)
1233 goto out_free_nl;
1234
1235 err = sock_diag_register(&inet6_diag_handler);
1236 if (err)
1237 goto out_free_inet;
1238
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001239 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001240out:
1241 return err;
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001242
1243out_free_inet:
1244 sock_diag_unregister(&inet_diag_handler);
1245out_free_nl:
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001246 kfree(inet_diag_table);
1247 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248}
1249
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001250static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251{
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001252 sock_diag_unregister(&inet6_diag_handler);
1253 sock_diag_unregister(&inet_diag_handler);
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001254 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001255 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256}
1257
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001258module_init(inet_diag_init);
1259module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260MODULE_LICENSE("GPL");
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +00001261MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1262MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);