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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03002 * inet_diag.c Module for monitoring INET transport protocols sockets.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
Ilpo Järvinen172589c2007-08-28 15:50:33 -070012#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/module.h>
14#include <linux/types.h>
15#include <linux/fcntl.h>
16#include <linux/random.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/cache.h>
19#include <linux/init.h>
20#include <linux/time.h>
21
22#include <net/icmp.h>
23#include <net/tcp.h>
24#include <net/ipv6.h>
25#include <net/inet_common.h>
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -030026#include <net/inet_connection_sock.h>
27#include <net/inet_hashtables.h>
28#include <net/inet_timewait_sock.h>
29#include <net/inet6_hashtables.h>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070030#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32#include <linux/inet.h>
33#include <linux/stddef.h>
34
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -030035#include <linux/inet_diag.h>
Pavel Emelyanovd3664772011-12-06 07:58:03 +000036#include <linux/sock_diag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030038static const struct inet_diag_handler **inet_diag_table;
39
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030040struct inet_diag_entry {
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;
47};
48
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030049#define INET_DIAG_PUT(skb, attrtype, attrlen) \
Stephen Hemminger7c99c902005-06-23 12:20:36 -070050 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Herbert Xud523a322007-12-03 15:51:25 +110052static DEFINE_MUTEX(inet_diag_table_mutex);
53
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000054static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
Herbert Xud523a322007-12-03 15:51:25 +110055{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000056 if (!inet_diag_table[proto])
Herbert Xud523a322007-12-03 15:51:25 +110057 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000058 NETLINK_SOCK_DIAG, proto);
Herbert Xud523a322007-12-03 15:51:25 +110059
60 mutex_lock(&inet_diag_table_mutex);
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000061 if (!inet_diag_table[proto])
Herbert Xud523a322007-12-03 15:51:25 +110062 return ERR_PTR(-ENOENT);
63
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000064 return inet_diag_table[proto];
Herbert Xud523a322007-12-03 15:51:25 +110065}
66
67static inline void inet_diag_unlock_handler(
68 const struct inet_diag_handler *handler)
69{
70 mutex_unlock(&inet_diag_table_mutex);
71}
72
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -080073static int inet_csk_diag_fill(struct sock *sk,
Pavel Emelyanova029fe22011-12-06 07:59:32 +000074 struct sk_buff *skb, struct inet_diag_req *req,
75 u32 pid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -080076 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070078 const struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070079 const struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030080 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 struct nlmsghdr *nlh;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030082 void *info = NULL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030083 struct inet_diag_meminfo *minfo = NULL;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -070084 unsigned char *b = skb_tail_pointer(skb);
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
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -030091 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 nlh->nlmsg_flags = nlmsg_flags;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030093
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 r = NLMSG_DATA(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080095 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -080096
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080097 if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
98 minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
99
100 if (ext & (1 << (INET_DIAG_INFO - 1)))
101 info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
102 handler->idiag_info_size);
103
104 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
105 const size_t len = strlen(icsk->icsk_ca_ops->name);
106
107 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
108 icsk->icsk_ca_ops->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 }
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800110
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300111 r->idiag_family = sk->sk_family;
112 r->idiag_state = sk->sk_state;
113 r->idiag_timer = 0;
114 r->idiag_retrans = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300116 r->id.idiag_if = sk->sk_bound_dev_if;
117 r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
118 r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000120 r->id.idiag_sport = inet->inet_sport;
121 r->id.idiag_dport = inet->inet_dport;
122 r->id.idiag_src[0] = inet->inet_rcv_saddr;
123 r->id.idiag_dst[0] = inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Maciej Żenczykowski717b6d82011-11-22 16:03:10 -0500125 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
126 * hence this needs to be included regardless of socket family.
127 */
128 if (ext & (1 << (INET_DIAG_TOS - 1)))
129 RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos);
130
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300131#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300132 if (r->idiag_family == AF_INET6) {
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000133 const struct ipv6_pinfo *np = inet6_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000135 *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr;
136 *(struct in6_addr *)r->id.idiag_dst = np->daddr;
Maciej Żenczykowski06236ac2011-11-07 14:23:11 +0000137 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
138 RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 }
140#endif
141
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700142#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700144 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300145 r->idiag_timer = 1;
146 r->idiag_retrans = icsk->icsk_retransmits;
147 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700148 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300149 r->idiag_timer = 4;
150 r->idiag_retrans = icsk->icsk_probes_out;
151 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300153 r->idiag_timer = 2;
154 r->idiag_retrans = icsk->icsk_probes_out;
155 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300157 r->idiag_timer = 0;
158 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 }
160#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300161
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300162 r->idiag_uid = sock_i_uid(sk);
163 r->idiag_inode = sock_i_ino(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165 if (minfo) {
Eric Dumazet31e6d362009-06-17 19:05:41 -0700166 minfo->idiag_rmem = sk_rmem_alloc_get(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300167 minfo->idiag_wmem = sk->sk_wmem_queued;
168 minfo->idiag_fmem = sk->sk_forward_alloc;
Eric Dumazet31e6d362009-06-17 19:05:41 -0700169 minfo->idiag_tmem = sk_wmem_alloc_get(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 }
171
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300172 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Arnaldo Carvalho de Melo6687e982005-08-10 04:03:31 -0300174 if (sk->sk_state < TCP_TIME_WAIT &&
175 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
176 icsk->icsk_ca_ops->get_info(sk, ext, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700178 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 return skb->len;
180
Stephen Hemminger7c99c902005-06-23 12:20:36 -0700181rtattr_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700183 nlmsg_trim(skb, b);
Patrick McHardy26932562007-01-31 23:16:40 -0800184 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185}
186
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800187static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000188 struct sk_buff *skb, struct inet_diag_req *req,
189 u32 pid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800190 const struct nlmsghdr *unlh)
191{
192 long tmo;
193 struct inet_diag_msg *r;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700194 const unsigned char *previous_tail = skb_tail_pointer(skb);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800195 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
196 unlh->nlmsg_type, sizeof(*r));
197
198 r = NLMSG_DATA(nlh);
199 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
200
201 nlh->nlmsg_flags = nlmsg_flags;
202
203 tmo = tw->tw_ttd - jiffies;
204 if (tmo < 0)
205 tmo = 0;
206
207 r->idiag_family = tw->tw_family;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800208 r->idiag_retrans = 0;
209 r->id.idiag_if = tw->tw_bound_dev_if;
210 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
211 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
212 r->id.idiag_sport = tw->tw_sport;
213 r->id.idiag_dport = tw->tw_dport;
214 r->id.idiag_src[0] = tw->tw_rcv_saddr;
215 r->id.idiag_dst[0] = tw->tw_daddr;
216 r->idiag_state = tw->tw_substate;
217 r->idiag_timer = 3;
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700218 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800219 r->idiag_rqueue = 0;
220 r->idiag_wqueue = 0;
221 r->idiag_uid = 0;
222 r->idiag_inode = 0;
223#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
224 if (tw->tw_family == AF_INET6) {
225 const struct inet6_timewait_sock *tw6 =
226 inet6_twsk((struct sock *)tw);
227
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000228 *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr;
229 *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800230 }
231#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700232 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800233 return skb->len;
234nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700235 nlmsg_trim(skb, previous_tail);
Patrick McHardy26932562007-01-31 23:16:40 -0800236 return -EMSGSIZE;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800237}
238
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800239static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000240 struct inet_diag_req *r, u32 pid, u32 seq, u16 nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800241 const struct nlmsghdr *unlh)
242{
243 if (sk->sk_state == TCP_TIME_WAIT)
244 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000245 skb, r, pid, seq, nlmsg_flags,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800246 unlh);
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000247 return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh);
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800248}
249
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800250static int inet_diag_get_exact(struct sk_buff *in_skb,
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000251 const struct nlmsghdr *nlh,
252 struct inet_diag_req *req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
254 int err;
255 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 struct sk_buff *rep;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300257 struct inet_hashinfo *hashinfo;
258 const struct inet_diag_handler *handler;
259
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000260 handler = inet_diag_lock_handler(req->sdiag_protocol);
Arnaldo Carvalho de Melo8cf8e5a2008-01-28 20:52:12 -0800261 if (IS_ERR(handler)) {
262 err = PTR_ERR(handler);
263 goto unlock;
264 }
Herbert Xud523a322007-12-03 15:51:25 +1100265
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300266 hashinfo = handler->idiag_hashinfo;
Herbert Xud523a322007-12-03 15:51:25 +1100267 err = -EINVAL;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300268
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000269 if (req->sdiag_family == AF_INET) {
Pavel Emelyanovc67499c2008-01-31 05:06:40 -0800270 sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0],
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300271 req->id.idiag_dport, req->id.idiag_src[0],
272 req->id.idiag_sport, req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 }
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300274#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000275 else if (req->sdiag_family == AF_INET6) {
Pavel Emelyanovd86e0da2008-01-31 05:07:21 -0800276 sk = inet6_lookup(&init_net, hashinfo,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300277 (struct in6_addr *)req->id.idiag_dst,
278 req->id.idiag_dport,
279 (struct in6_addr *)req->id.idiag_src,
280 req->id.idiag_sport,
281 req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 }
283#endif
284 else {
Herbert Xud523a322007-12-03 15:51:25 +1100285 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 }
287
Herbert Xud523a322007-12-03 15:51:25 +1100288 err = -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 if (sk == NULL)
Herbert Xud523a322007-12-03 15:51:25 +1100290 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292 err = -ESTALE;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300293 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
294 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
295 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
296 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 goto out;
298
299 err = -ENOMEM;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300300 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
301 sizeof(struct inet_diag_meminfo) +
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300302 handler->idiag_info_size + 64)),
303 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 if (!rep)
305 goto out;
306
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000307 err = sk_diag_fill(sk, rep, req,
Patrick McHardy26932562007-01-31 23:16:40 -0800308 NETLINK_CB(in_skb).pid,
309 nlh->nlmsg_seq, 0, nlh);
310 if (err < 0) {
311 WARN_ON(err == -EMSGSIZE);
312 kfree_skb(rep);
313 goto out;
314 }
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +0000315 err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300316 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 if (err > 0)
318 err = 0;
319
320out:
321 if (sk) {
322 if (sk->sk_state == TCP_TIME_WAIT)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700323 inet_twsk_put((struct inet_timewait_sock *)sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 else
325 sock_put(sk);
326 }
Herbert Xud523a322007-12-03 15:51:25 +1100327unlock:
328 inet_diag_unlock_handler(handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 return err;
330}
331
Al Viro9f855292006-09-27 18:44:30 -0700332static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
334 int words = bits >> 5;
335
336 bits &= 0x1f;
337
338 if (words) {
339 if (memcmp(a1, a2, words << 2))
340 return 0;
341 }
342 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700343 __be32 w1, w2;
344 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 w1 = a1[words];
347 w2 = a2[words];
348
349 mask = htonl((0xffffffff) << (32 - bits));
350
351 if ((w1 ^ w2) & mask)
352 return 0;
353 }
354
355 return 1;
356}
357
358
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300359static int inet_diag_bc_run(const void *bc, int len,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800360 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
362 while (len > 0) {
363 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300364 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300367 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300369 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 yes = 0;
371 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300372 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 yes = entry->sport >= op[1].no;
374 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300375 case INET_DIAG_BC_S_LE:
Roel Kluinb4ced2b2010-01-19 14:12:20 -0800376 yes = entry->sport <= op[1].no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300378 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 yes = entry->dport >= op[1].no;
380 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300381 case INET_DIAG_BC_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 yes = entry->dport <= op[1].no;
383 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300384 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
386 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300387 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300388 case INET_DIAG_BC_D_COND: {
389 struct inet_diag_hostcond *cond;
Al Viro9f855292006-09-27 18:44:30 -0700390 __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300392 cond = (struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300394 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 entry->sport : entry->dport)) {
396 yes = 0;
397 break;
398 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 if (cond->prefix_len == 0)
401 break;
402
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300403 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 addr = entry->saddr;
405 else
406 addr = entry->daddr;
407
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800408 if (bitstring_match(addr, cond->addr,
409 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 break;
411 if (entry->family == AF_INET6 &&
412 cond->family == AF_INET) {
413 if (addr[0] == 0 && addr[1] == 0 &&
414 addr[2] == htonl(0xffff) &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300415 bitstring_match(addr + 3, cond->addr,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900416 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 break;
418 }
419 yes = 0;
420 break;
421 }
422 }
423
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800424 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 len -= op->yes;
426 bc += op->yes;
427 } else {
428 len -= op->no;
429 bc += op->no;
430 }
431 }
Eric Dumazeta02cec22010-09-22 20:43:57 +0000432 return len == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433}
434
435static int valid_cc(const void *bc, int len, int cc)
436{
437 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300438 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440 if (cc > len)
441 return 0;
442 if (cc == len)
443 return 1;
Eric Dumazeteeb14972011-06-17 16:25:39 -0400444 if (op->yes < 4 || op->yes & 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 return 0;
446 len -= op->yes;
447 bc += op->yes;
448 }
449 return 0;
450}
451
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300452static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453{
Eric Dumazeteeb14972011-06-17 16:25:39 -0400454 const void *bc = bytecode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 int len = bytecode_len;
456
457 while (len > 0) {
Eric Dumazeteeb14972011-06-17 16:25:39 -0400458 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
460//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
461 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300462 case INET_DIAG_BC_AUTO:
463 case INET_DIAG_BC_S_COND:
464 case INET_DIAG_BC_D_COND:
465 case INET_DIAG_BC_S_GE:
466 case INET_DIAG_BC_S_LE:
467 case INET_DIAG_BC_D_GE:
468 case INET_DIAG_BC_D_LE:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300469 case INET_DIAG_BC_JMP:
Eric Dumazeteeb14972011-06-17 16:25:39 -0400470 if (op->no < 4 || op->no > len + 4 || op->no & 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 return -EINVAL;
472 if (op->no < len &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300473 !valid_cc(bytecode, bytecode_len, len - op->no))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 return -EINVAL;
475 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300476 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 break;
478 default:
479 return -EINVAL;
480 }
Eric Dumazeteeb14972011-06-17 16:25:39 -0400481 if (op->yes < 4 || op->yes > len + 4 || op->yes & 3)
482 return -EINVAL;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800483 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 len -= op->yes;
485 }
486 return len == 0 ? 0 : -EINVAL;
487}
488
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800489static int inet_csk_diag_dump(struct sock *sk,
490 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000491 struct netlink_callback *cb,
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000492 struct inet_diag_req *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000493 const struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494{
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000495 if (bc != NULL) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300496 struct inet_diag_entry entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 struct inet_sock *inet = inet_sk(sk);
498
499 entry.family = sk->sk_family;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300500#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 if (entry.family == AF_INET6) {
502 struct ipv6_pinfo *np = inet6_sk(sk);
503
504 entry.saddr = np->rcv_saddr.s6_addr32;
505 entry.daddr = np->daddr.s6_addr32;
506 } else
507#endif
508 {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000509 entry.saddr = &inet->inet_rcv_saddr;
510 entry.daddr = &inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 }
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000512 entry.sport = inet->inet_num;
513 entry.dport = ntohs(inet->inet_dport);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 entry.userlocks = sk->sk_userlocks;
515
Nelson Elhage22e76c82010-11-03 16:35:41 +0000516 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 return 0;
518 }
519
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000520 return inet_csk_diag_fill(sk, skb, r,
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800521 NETLINK_CB(cb->skb).pid,
522 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523}
524
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800525static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
526 struct sk_buff *skb,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000527 struct netlink_callback *cb,
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000528 struct inet_diag_req *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000529 const struct nlattr *bc)
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800530{
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000531 if (bc != NULL) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800532 struct inet_diag_entry entry;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800533
534 entry.family = tw->tw_family;
535#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
536 if (tw->tw_family == AF_INET6) {
537 struct inet6_timewait_sock *tw6 =
538 inet6_twsk((struct sock *)tw);
539 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
540 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
541 } else
542#endif
543 {
544 entry.saddr = &tw->tw_rcv_saddr;
545 entry.daddr = &tw->tw_daddr;
546 }
547 entry.sport = tw->tw_num;
548 entry.dport = ntohs(tw->tw_dport);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900549 entry.userlocks = 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800550
Nelson Elhage22e76c82010-11-03 16:35:41 +0000551 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800552 return 0;
553 }
554
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000555 return inet_twsk_diag_fill(tw, skb, r,
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800556 NETLINK_CB(cb->skb).pid,
557 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
558}
559
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300560static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800561 struct request_sock *req, u32 pid, u32 seq,
562 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563{
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700564 const struct inet_request_sock *ireq = inet_rsk(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700566 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300567 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 struct nlmsghdr *nlh;
569 long tmo;
570
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300571 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 nlh->nlmsg_flags = NLM_F_MULTI;
573 r = NLMSG_DATA(nlh);
574
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300575 r->idiag_family = sk->sk_family;
576 r->idiag_state = TCP_SYN_RECV;
577 r->idiag_timer = 1;
578 r->idiag_retrans = req->retrans;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300580 r->id.idiag_if = sk->sk_bound_dev_if;
581 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
582 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
584 tmo = req->expires - jiffies;
585 if (tmo < 0)
586 tmo = 0;
587
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000588 r->id.idiag_sport = inet->inet_sport;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300589 r->id.idiag_dport = ireq->rmt_port;
590 r->id.idiag_src[0] = ireq->loc_addr;
591 r->id.idiag_dst[0] = ireq->rmt_addr;
592 r->idiag_expires = jiffies_to_msecs(tmo);
593 r->idiag_rqueue = 0;
594 r->idiag_wqueue = 0;
595 r->idiag_uid = sock_i_uid(sk);
596 r->idiag_inode = 0;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300597#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300598 if (r->idiag_family == AF_INET6) {
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000599 *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr;
600 *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 }
602#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700603 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605 return skb->len;
606
607nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700608 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 return -1;
610}
611
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300612static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000613 struct netlink_callback *cb,
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000614 struct inet_diag_req *r,
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000615 const struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300617 struct inet_diag_entry entry;
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700618 struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo2ad69c52005-06-18 22:48:55 -0700619 struct listen_sock *lopt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 struct inet_sock *inet = inet_sk(sk);
621 int j, s_j;
622 int reqnum, s_reqnum;
623 int err = 0;
624
625 s_j = cb->args[3];
626 s_reqnum = cb->args[4];
627
628 if (s_j > 0)
629 s_j--;
630
631 entry.family = sk->sk_family;
632
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700633 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700635 lopt = icsk->icsk_accept_queue.listen_opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 if (!lopt || !lopt->qlen)
637 goto out;
638
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000639 if (bc != NULL) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000640 entry.sport = inet->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 entry.userlocks = sk->sk_userlocks;
642 }
643
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300644 for (j = s_j; j < lopt->nr_table_entries; j++) {
Arnaldo Carvalho de Melo60236fd2005-06-18 22:47:21 -0700645 struct request_sock *req, *head = lopt->syn_table[j];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
647 reqnum = 0;
648 for (req = head; req; reqnum++, req = req->dl_next) {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700649 struct inet_request_sock *ireq = inet_rsk(req);
650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 if (reqnum < s_reqnum)
652 continue;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300653 if (r->id.idiag_dport != ireq->rmt_port &&
654 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 continue;
656
657 if (bc) {
658 entry.saddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300659#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800661 inet6_rsk(req)->loc_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700663 &ireq->loc_addr;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800664 entry.daddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300665#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800667 inet6_rsk(req)->rmt_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700669 &ireq->rmt_addr;
670 entry.dport = ntohs(ireq->rmt_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
Nelson Elhage22e76c82010-11-03 16:35:41 +0000672 if (!inet_diag_bc_run(nla_data(bc),
673 nla_len(bc), &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 continue;
675 }
676
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300677 err = inet_diag_fill_req(skb, sk, req,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 NETLINK_CB(cb->skb).pid,
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300679 cb->nlh->nlmsg_seq, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 if (err < 0) {
681 cb->args[3] = j + 1;
682 cb->args[4] = reqnum;
683 goto out;
684 }
685 }
686
687 s_reqnum = 0;
688 }
689
690out:
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700691 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
693 return err;
694}
695
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000696static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
697 struct inet_diag_req *r, struct nlattr *bc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698{
699 int i, num;
700 int s_i, s_num;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300701 const struct inet_diag_handler *handler;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300702 struct inet_hashinfo *hashinfo;
Pavel Emelyanov37f352b2011-12-06 07:57:26 +0000703
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000704 handler = inet_diag_lock_handler(r->sdiag_protocol);
Arnaldo Carvalho de Melo8cf8e5a2008-01-28 20:52:12 -0800705 if (IS_ERR(handler))
706 goto unlock;
Herbert Xud523a322007-12-03 15:51:25 +1100707
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300708 hashinfo = handler->idiag_hashinfo;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800709
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 s_i = cb->args[1];
711 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300712
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 if (cb->args[0] == 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300714 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300716
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700717 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 struct sock *sk;
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800719 struct hlist_nulls_node *node;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800720 struct inet_listen_hashbucket *ilb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722 num = 0;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800723 ilb = &hashinfo->listening_hash[i];
724 spin_lock_bh(&ilb->lock);
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800725 sk_nulls_for_each(sk, node, &ilb->head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 struct inet_sock *inet = inet_sk(sk);
727
728 if (num < s_num) {
729 num++;
730 continue;
731 }
732
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000733 if (r->sdiag_family != AF_UNSPEC &&
734 sk->sk_family != r->sdiag_family)
735 goto next_listen;
736
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000737 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300738 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 goto next_listen;
740
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300741 if (!(r->idiag_states & TCPF_LISTEN) ||
742 r->id.idiag_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 cb->args[3] > 0)
744 goto syn_recv;
745
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000746 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800747 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 goto done;
749 }
750
751syn_recv:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300752 if (!(r->idiag_states & TCPF_SYN_RECV))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 goto next_listen;
754
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000755 if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800756 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 goto done;
758 }
759
760next_listen:
761 cb->args[3] = 0;
762 cb->args[4] = 0;
763 ++num;
764 }
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800765 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
767 s_num = 0;
768 cb->args[3] = 0;
769 cb->args[4] = 0;
770 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771skip_listen_ht:
772 cb->args[0] = 1;
773 s_i = num = s_num = 0;
774 }
775
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300776 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
Herbert Xud523a322007-12-03 15:51:25 +1100777 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
Eric Dumazetf373b532009-10-09 00:16:19 +0000779 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300780 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
David S. Miller7e3aab42008-11-21 16:39:19 -0800781 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 struct sock *sk;
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800783 struct hlist_nulls_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
Andi Kleen6be547a2008-08-28 01:09:54 -0700785 num = 0;
786
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800787 if (hlist_nulls_empty(&head->chain) &&
788 hlist_nulls_empty(&head->twchain))
Andi Kleen6be547a2008-08-28 01:09:54 -0700789 continue;
790
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 if (i > s_i)
792 s_num = 0;
793
David S. Miller7e3aab42008-11-21 16:39:19 -0800794 spin_lock_bh(lock);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800795 sk_nulls_for_each(sk, node, &head->chain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 struct inet_sock *inet = inet_sk(sk);
797
798 if (num < s_num)
799 goto next_normal;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300800 if (!(r->idiag_states & (1 << sk->sk_state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 goto next_normal;
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000802 if (r->sdiag_family != AF_UNSPEC &&
803 sk->sk_family != r->sdiag_family)
804 goto next_normal;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000805 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300806 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 goto next_normal;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000808 if (r->id.idiag_dport != inet->inet_dport &&
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800809 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 goto next_normal;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000811 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800812 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 goto done;
814 }
815next_normal:
816 ++num;
817 }
818
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300819 if (r->idiag_states & TCPF_TIME_WAIT) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800820 struct inet_timewait_sock *tw;
821
822 inet_twsk_for_each(tw, node,
Eric Dumazetdbca9b2752007-02-08 14:16:46 -0800823 &head->twchain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
825 if (num < s_num)
826 goto next_dying;
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000827 if (r->sdiag_family != AF_UNSPEC &&
828 tw->tw_family != r->sdiag_family)
829 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800830 if (r->id.idiag_sport != tw->tw_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300831 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800833 if (r->id.idiag_dport != tw->tw_dport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300834 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 goto next_dying;
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000836 if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800837 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 goto done;
839 }
840next_dying:
841 ++num;
842 }
843 }
David S. Miller7e3aab42008-11-21 16:39:19 -0800844 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 }
846
847done:
848 cb->args[1] = i;
849 cb->args[2] = num;
Herbert Xud523a322007-12-03 15:51:25 +1100850unlock:
851 inet_diag_unlock_handler(handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 return skb->len;
853}
854
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000855static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
856{
857 struct nlattr *bc = NULL;
858 int hdrlen = sizeof(struct inet_diag_req);
859
860 if (nlmsg_attrlen(cb->nlh, hdrlen))
861 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
862
863 return __inet_diag_dump(skb, cb, (struct inet_diag_req *)NLMSG_DATA(cb->nlh), bc);
864}
865
Pavel Emelyanova029fe22011-12-06 07:59:32 +0000866static inline int inet_diag_type2proto(int type)
867{
868 switch (type) {
869 case TCPDIAG_GETSOCK:
870 return IPPROTO_TCP;
871 case DCCPDIAG_GETSOCK:
872 return IPPROTO_DCCP;
873 default:
874 return 0;
875 }
876}
877
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000878static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb)
879{
880 struct inet_diag_req_compat *rc = NLMSG_DATA(cb->nlh);
881 struct inet_diag_req req;
882 struct nlattr *bc = NULL;
883 int hdrlen = sizeof(struct inet_diag_req_compat);
884
Pavel Emelyanovd23deaa2011-12-06 07:59:15 +0000885 req.sdiag_family = AF_UNSPEC; /* compatibility */
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000886 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
887 req.idiag_ext = rc->idiag_ext;
888 req.idiag_states = rc->idiag_states;
889 req.id = rc->id;
890
891 if (nlmsg_attrlen(cb->nlh, hdrlen))
892 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
893
894 return __inet_diag_dump(skb, cb, &req, bc);
895}
896
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000897static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
898 const struct nlmsghdr *nlh)
899{
900 struct inet_diag_req_compat *rc = NLMSG_DATA(nlh);
901 struct inet_diag_req req;
902
903 req.sdiag_family = rc->idiag_family;
904 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
905 req.idiag_ext = rc->idiag_ext;
906 req.idiag_states = rc->idiag_states;
907 req.id = rc->id;
908
909 return inet_diag_get_exact(in_skb, nlh, &req);
910}
911
Pavel Emelyanov8d341722011-12-06 07:57:06 +0000912static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913{
Pavel Emelyanov126fdc32011-12-06 07:58:21 +0000914 int hdrlen = sizeof(struct inet_diag_req_compat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Thomas Grafead592b2007-03-22 23:30:35 -0700916 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
917 nlmsg_len(nlh) < hdrlen)
918 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919
David S. Millerb8f3ab42011-01-18 12:40:38 -0800920 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -0700921 if (nlmsg_attrlen(nlh, hdrlen)) {
922 struct nlattr *attr;
923
924 attr = nlmsg_find_attr(nlh, hdrlen,
925 INET_DIAG_REQ_BYTECODE);
926 if (attr == NULL ||
927 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
928 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
929 return -EINVAL;
930 }
931
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +0000932 return netlink_dump_start(sock_diag_nlsk, skb, nlh,
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000933 inet_diag_dump_compat, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 }
Thomas Grafead592b2007-03-22 23:30:35 -0700935
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000936 return inet_diag_get_exact_compat(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937}
938
Pavel Emelyanovd3664772011-12-06 07:58:03 +0000939static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
940{
941 int hdrlen = sizeof(struct inet_diag_req);
942
943 if (nlmsg_len(h) < hdrlen)
944 return -EINVAL;
945
946 if (h->nlmsg_flags & NLM_F_DUMP) {
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000947 if (nlmsg_attrlen(h, hdrlen)) {
948 struct nlattr *attr;
949 attr = nlmsg_find_attr(h, hdrlen,
950 INET_DIAG_REQ_BYTECODE);
951 if (attr == NULL ||
952 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
953 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
954 return -EINVAL;
955 }
956
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +0000957 return netlink_dump_start(sock_diag_nlsk, skb, h,
Pavel Emelyanov25c4cd22011-12-06 07:58:58 +0000958 inet_diag_dump, NULL, 0);
Pavel Emelyanovd3664772011-12-06 07:58:03 +0000959 }
960
Pavel Emelyanovfe50ce22011-12-06 07:58:39 +0000961 return inet_diag_get_exact(skb, h, (struct inet_diag_req *)NLMSG_DATA(h));
Pavel Emelyanovd3664772011-12-06 07:58:03 +0000962}
963
964static struct sock_diag_handler inet_diag_handler = {
965 .family = AF_INET,
966 .dump = inet_diag_handler_dump,
967};
968
969static struct sock_diag_handler inet6_diag_handler = {
970 .family = AF_INET6,
971 .dump = inet_diag_handler_dump,
972};
973
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300974int inet_diag_register(const struct inet_diag_handler *h)
975{
976 const __u16 type = h->idiag_type;
977 int err = -EINVAL;
978
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +0000979 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300980 goto out;
981
Herbert Xud523a322007-12-03 15:51:25 +1100982 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300983 err = -EEXIST;
984 if (inet_diag_table[type] == NULL) {
985 inet_diag_table[type] = h;
986 err = 0;
987 }
Herbert Xud523a322007-12-03 15:51:25 +1100988 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300989out:
990 return err;
991}
992EXPORT_SYMBOL_GPL(inet_diag_register);
993
994void inet_diag_unregister(const struct inet_diag_handler *h)
995{
996 const __u16 type = h->idiag_type;
997
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +0000998 if (type >= IPPROTO_MAX)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300999 return;
1000
Herbert Xud523a322007-12-03 15:51:25 +11001001 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001002 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +11001003 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001004}
1005EXPORT_SYMBOL_GPL(inet_diag_unregister);
1006
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001007static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008{
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +00001009 const int inet_diag_table_size = (IPPROTO_MAX *
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001010 sizeof(struct inet_diag_handler *));
1011 int err = -ENOMEM;
1012
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001013 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001014 if (!inet_diag_table)
1015 goto out;
1016
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001017 err = sock_diag_register(&inet_diag_handler);
1018 if (err)
1019 goto out_free_nl;
1020
1021 err = sock_diag_register(&inet6_diag_handler);
1022 if (err)
1023 goto out_free_inet;
1024
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001025 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001026out:
1027 return err;
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001028
1029out_free_inet:
1030 sock_diag_unregister(&inet_diag_handler);
1031out_free_nl:
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001032 kfree(inet_diag_table);
1033 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034}
1035
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001036static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037{
Pavel Emelyanovd3664772011-12-06 07:58:03 +00001038 sock_diag_unregister(&inet6_diag_handler);
1039 sock_diag_unregister(&inet_diag_handler);
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001040 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001041 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042}
1043
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03001044module_init(inet_diag_init);
1045module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046MODULE_LICENSE("GPL");
Pavel Emelyanov8ef874b2011-12-06 07:59:52 +00001047MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 0);