blob: 2ada17129fce6ac9a7285f6033e30d0a9bc4b98a [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030037static const struct inet_diag_handler **inet_diag_table;
38
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030039struct inet_diag_entry {
Al Viro9f855292006-09-27 18:44:30 -070040 __be32 *saddr;
41 __be32 *daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 u16 sport;
43 u16 dport;
44 u16 family;
45 u16 userlocks;
46};
47
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030048static struct sock *idiagnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030050#define INET_DIAG_PUT(skb, attrtype, attrlen) \
Stephen Hemminger7c99c902005-06-23 12:20:36 -070051 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Herbert Xud523a322007-12-03 15:51:25 +110053static DEFINE_MUTEX(inet_diag_table_mutex);
54
55static const struct inet_diag_handler *inet_diag_lock_handler(int type)
56{
Herbert Xud523a322007-12-03 15:51:25 +110057 if (!inet_diag_table[type])
58 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
59 NETLINK_INET_DIAG, type);
Herbert Xud523a322007-12-03 15:51:25 +110060
61 mutex_lock(&inet_diag_table_mutex);
62 if (!inet_diag_table[type])
63 return ERR_PTR(-ENOENT);
64
65 return inet_diag_table[type];
66}
67
68static inline void inet_diag_unlock_handler(
69 const struct inet_diag_handler *handler)
70{
71 mutex_unlock(&inet_diag_table_mutex);
72}
73
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -080074static int inet_csk_diag_fill(struct sock *sk,
75 struct sk_buff *skb,
76 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
77 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070079 const struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070080 const struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030081 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct nlmsghdr *nlh;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030083 void *info = NULL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030084 struct inet_diag_meminfo *minfo = NULL;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -070085 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030086 const struct inet_diag_handler *handler;
87
88 handler = inet_diag_table[unlh->nlmsg_type];
89 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
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300125#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300126 if (r->idiag_family == AF_INET6) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 struct ipv6_pinfo *np = inet6_sk(sk);
128
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300129 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 &np->rcv_saddr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300131 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 &np->daddr);
133 }
134#endif
135
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700136#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700138 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300139 r->idiag_timer = 1;
140 r->idiag_retrans = icsk->icsk_retransmits;
141 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700142 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300143 r->idiag_timer = 4;
144 r->idiag_retrans = icsk->icsk_probes_out;
145 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300147 r->idiag_timer = 2;
148 r->idiag_retrans = icsk->icsk_probes_out;
149 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300151 r->idiag_timer = 0;
152 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 }
154#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300155
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300156 r->idiag_uid = sock_i_uid(sk);
157 r->idiag_inode = sock_i_ino(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159 if (minfo) {
Eric Dumazet31e6d362009-06-17 19:05:41 -0700160 minfo->idiag_rmem = sk_rmem_alloc_get(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300161 minfo->idiag_wmem = sk->sk_wmem_queued;
162 minfo->idiag_fmem = sk->sk_forward_alloc;
Eric Dumazet31e6d362009-06-17 19:05:41 -0700163 minfo->idiag_tmem = sk_wmem_alloc_get(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 }
165
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300166 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Arnaldo Carvalho de Melo6687e982005-08-10 04:03:31 -0300168 if (sk->sk_state < TCP_TIME_WAIT &&
169 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
170 icsk->icsk_ca_ops->get_info(sk, ext, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700172 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 return skb->len;
174
Stephen Hemminger7c99c902005-06-23 12:20:36 -0700175rtattr_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700177 nlmsg_trim(skb, b);
Patrick McHardy26932562007-01-31 23:16:40 -0800178 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179}
180
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800181static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
182 struct sk_buff *skb, int ext, u32 pid,
183 u32 seq, u16 nlmsg_flags,
184 const struct nlmsghdr *unlh)
185{
186 long tmo;
187 struct inet_diag_msg *r;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700188 const unsigned char *previous_tail = skb_tail_pointer(skb);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800189 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
190 unlh->nlmsg_type, sizeof(*r));
191
192 r = NLMSG_DATA(nlh);
193 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
194
195 nlh->nlmsg_flags = nlmsg_flags;
196
197 tmo = tw->tw_ttd - jiffies;
198 if (tmo < 0)
199 tmo = 0;
200
201 r->idiag_family = tw->tw_family;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800202 r->idiag_retrans = 0;
203 r->id.idiag_if = tw->tw_bound_dev_if;
204 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
205 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
206 r->id.idiag_sport = tw->tw_sport;
207 r->id.idiag_dport = tw->tw_dport;
208 r->id.idiag_src[0] = tw->tw_rcv_saddr;
209 r->id.idiag_dst[0] = tw->tw_daddr;
210 r->idiag_state = tw->tw_substate;
211 r->idiag_timer = 3;
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700212 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800213 r->idiag_rqueue = 0;
214 r->idiag_wqueue = 0;
215 r->idiag_uid = 0;
216 r->idiag_inode = 0;
217#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
218 if (tw->tw_family == AF_INET6) {
219 const struct inet6_timewait_sock *tw6 =
220 inet6_twsk((struct sock *)tw);
221
222 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
223 &tw6->tw_v6_rcv_saddr);
224 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
225 &tw6->tw_v6_daddr);
226 }
227#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700228 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800229 return skb->len;
230nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700231 nlmsg_trim(skb, previous_tail);
Patrick McHardy26932562007-01-31 23:16:40 -0800232 return -EMSGSIZE;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800233}
234
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800235static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
236 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
237 const struct nlmsghdr *unlh)
238{
239 if (sk->sk_state == TCP_TIME_WAIT)
240 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
241 skb, ext, pid, seq, nlmsg_flags,
242 unlh);
243 return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
244}
245
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800246static int inet_diag_get_exact(struct sk_buff *in_skb,
247 const struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248{
249 int err;
250 struct sock *sk;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300251 struct inet_diag_req *req = NLMSG_DATA(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 struct sk_buff *rep;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300253 struct inet_hashinfo *hashinfo;
254 const struct inet_diag_handler *handler;
255
Herbert Xud523a322007-12-03 15:51:25 +1100256 handler = inet_diag_lock_handler(nlh->nlmsg_type);
Arnaldo Carvalho de Melo8cf8e5a2008-01-28 20:52:12 -0800257 if (IS_ERR(handler)) {
258 err = PTR_ERR(handler);
259 goto unlock;
260 }
Herbert Xud523a322007-12-03 15:51:25 +1100261
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300262 hashinfo = handler->idiag_hashinfo;
Herbert Xud523a322007-12-03 15:51:25 +1100263 err = -EINVAL;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300264
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300265 if (req->idiag_family == AF_INET) {
Pavel Emelyanovc67499c2008-01-31 05:06:40 -0800266 sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0],
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300267 req->id.idiag_dport, req->id.idiag_src[0],
268 req->id.idiag_sport, req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 }
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300270#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300271 else if (req->idiag_family == AF_INET6) {
Pavel Emelyanovd86e0da2008-01-31 05:07:21 -0800272 sk = inet6_lookup(&init_net, hashinfo,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300273 (struct in6_addr *)req->id.idiag_dst,
274 req->id.idiag_dport,
275 (struct in6_addr *)req->id.idiag_src,
276 req->id.idiag_sport,
277 req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 }
279#endif
280 else {
Herbert Xud523a322007-12-03 15:51:25 +1100281 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 }
283
Herbert Xud523a322007-12-03 15:51:25 +1100284 err = -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 if (sk == NULL)
Herbert Xud523a322007-12-03 15:51:25 +1100286 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
288 err = -ESTALE;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300289 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
290 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
291 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
292 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 goto out;
294
295 err = -ENOMEM;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300296 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
297 sizeof(struct inet_diag_meminfo) +
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300298 handler->idiag_info_size + 64)),
299 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 if (!rep)
301 goto out;
302
Patrick McHardy26932562007-01-31 23:16:40 -0800303 err = sk_diag_fill(sk, rep, req->idiag_ext,
304 NETLINK_CB(in_skb).pid,
305 nlh->nlmsg_seq, 0, nlh);
306 if (err < 0) {
307 WARN_ON(err == -EMSGSIZE);
308 kfree_skb(rep);
309 goto out;
310 }
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300311 err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
312 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 if (err > 0)
314 err = 0;
315
316out:
317 if (sk) {
318 if (sk->sk_state == TCP_TIME_WAIT)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700319 inet_twsk_put((struct inet_timewait_sock *)sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 else
321 sock_put(sk);
322 }
Herbert Xud523a322007-12-03 15:51:25 +1100323unlock:
324 inet_diag_unlock_handler(handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 return err;
326}
327
Al Viro9f855292006-09-27 18:44:30 -0700328static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329{
330 int words = bits >> 5;
331
332 bits &= 0x1f;
333
334 if (words) {
335 if (memcmp(a1, a2, words << 2))
336 return 0;
337 }
338 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700339 __be32 w1, w2;
340 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342 w1 = a1[words];
343 w2 = a2[words];
344
345 mask = htonl((0xffffffff) << (32 - bits));
346
347 if ((w1 ^ w2) & mask)
348 return 0;
349 }
350
351 return 1;
352}
353
354
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300355static int inet_diag_bc_run(const void *bc, int len,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800356 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357{
358 while (len > 0) {
359 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300360 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300363 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300365 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 yes = 0;
367 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300368 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 yes = entry->sport >= op[1].no;
370 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300371 case INET_DIAG_BC_S_LE:
Roel Kluinb4ced2b2010-01-19 14:12:20 -0800372 yes = entry->sport <= op[1].no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300374 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 yes = entry->dport >= op[1].no;
376 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300377 case INET_DIAG_BC_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 yes = entry->dport <= op[1].no;
379 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300380 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
382 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300383 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300384 case INET_DIAG_BC_D_COND: {
385 struct inet_diag_hostcond *cond;
Al Viro9f855292006-09-27 18:44:30 -0700386 __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300388 cond = (struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300390 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 entry->sport : entry->dport)) {
392 yes = 0;
393 break;
394 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 if (cond->prefix_len == 0)
397 break;
398
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300399 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 addr = entry->saddr;
401 else
402 addr = entry->daddr;
403
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800404 if (bitstring_match(addr, cond->addr,
405 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 break;
407 if (entry->family == AF_INET6 &&
408 cond->family == AF_INET) {
409 if (addr[0] == 0 && addr[1] == 0 &&
410 addr[2] == htonl(0xffff) &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300411 bitstring_match(addr + 3, cond->addr,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900412 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 break;
414 }
415 yes = 0;
416 break;
417 }
418 }
419
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800420 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 len -= op->yes;
422 bc += op->yes;
423 } else {
424 len -= op->no;
425 bc += op->no;
426 }
427 }
Eric Dumazeta02cec22010-09-22 20:43:57 +0000428 return len == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429}
430
431static int valid_cc(const void *bc, int len, int cc)
432{
433 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300434 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
436 if (cc > len)
437 return 0;
438 if (cc == len)
439 return 1;
440 if (op->yes < 4)
441 return 0;
442 len -= op->yes;
443 bc += op->yes;
444 }
445 return 0;
446}
447
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300448static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
450 const unsigned char *bc = bytecode;
451 int len = bytecode_len;
452
453 while (len > 0) {
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300454 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
456//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
457 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300458 case INET_DIAG_BC_AUTO:
459 case INET_DIAG_BC_S_COND:
460 case INET_DIAG_BC_D_COND:
461 case INET_DIAG_BC_S_GE:
462 case INET_DIAG_BC_S_LE:
463 case INET_DIAG_BC_D_GE:
464 case INET_DIAG_BC_D_LE:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300465 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 return -EINVAL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300467 case INET_DIAG_BC_JMP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300468 if (op->no < 4 || op->no > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return -EINVAL;
470 if (op->no < len &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300471 !valid_cc(bytecode, bytecode_len, len - op->no))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 return -EINVAL;
473 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300474 case INET_DIAG_BC_NOP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300475 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 return -EINVAL;
477 break;
478 default:
479 return -EINVAL;
480 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800481 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 len -= op->yes;
483 }
484 return len == 0 ? 0 : -EINVAL;
485}
486
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800487static int inet_csk_diag_dump(struct sock *sk,
488 struct sk_buff *skb,
489 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300491 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Nelson Elhage22e76c82010-11-03 16:35:41 +0000493 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300494 struct inet_diag_entry entry;
Nelson Elhage22e76c82010-11-03 16:35:41 +0000495 const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
496 sizeof(*r),
497 INET_DIAG_REQ_BYTECODE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 struct inet_sock *inet = inet_sk(sk);
499
500 entry.family = sk->sk_family;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300501#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 if (entry.family == AF_INET6) {
503 struct ipv6_pinfo *np = inet6_sk(sk);
504
505 entry.saddr = np->rcv_saddr.s6_addr32;
506 entry.daddr = np->daddr.s6_addr32;
507 } else
508#endif
509 {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000510 entry.saddr = &inet->inet_rcv_saddr;
511 entry.daddr = &inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 }
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000513 entry.sport = inet->inet_num;
514 entry.dport = ntohs(inet->inet_dport);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 entry.userlocks = sk->sk_userlocks;
516
Nelson Elhage22e76c82010-11-03 16:35:41 +0000517 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return 0;
519 }
520
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800521 return inet_csk_diag_fill(sk, skb, r->idiag_ext,
522 NETLINK_CB(cb->skb).pid,
523 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524}
525
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800526static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
527 struct sk_buff *skb,
528 struct netlink_callback *cb)
529{
530 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
531
Nelson Elhage22e76c82010-11-03 16:35:41 +0000532 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800533 struct inet_diag_entry entry;
Nelson Elhage22e76c82010-11-03 16:35:41 +0000534 const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
535 sizeof(*r),
536 INET_DIAG_REQ_BYTECODE);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800537
538 entry.family = tw->tw_family;
539#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
540 if (tw->tw_family == AF_INET6) {
541 struct inet6_timewait_sock *tw6 =
542 inet6_twsk((struct sock *)tw);
543 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
544 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
545 } else
546#endif
547 {
548 entry.saddr = &tw->tw_rcv_saddr;
549 entry.daddr = &tw->tw_daddr;
550 }
551 entry.sport = tw->tw_num;
552 entry.dport = ntohs(tw->tw_dport);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900553 entry.userlocks = 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800554
Nelson Elhage22e76c82010-11-03 16:35:41 +0000555 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800556 return 0;
557 }
558
559 return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
560 NETLINK_CB(cb->skb).pid,
561 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
562}
563
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300564static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800565 struct request_sock *req, u32 pid, u32 seq,
566 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567{
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700568 const struct inet_request_sock *ireq = inet_rsk(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700570 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300571 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 struct nlmsghdr *nlh;
573 long tmo;
574
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300575 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 nlh->nlmsg_flags = NLM_F_MULTI;
577 r = NLMSG_DATA(nlh);
578
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300579 r->idiag_family = sk->sk_family;
580 r->idiag_state = TCP_SYN_RECV;
581 r->idiag_timer = 1;
582 r->idiag_retrans = req->retrans;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300584 r->id.idiag_if = sk->sk_bound_dev_if;
585 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
586 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
588 tmo = req->expires - jiffies;
589 if (tmo < 0)
590 tmo = 0;
591
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000592 r->id.idiag_sport = inet->inet_sport;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300593 r->id.idiag_dport = ireq->rmt_port;
594 r->id.idiag_src[0] = ireq->loc_addr;
595 r->id.idiag_dst[0] = ireq->rmt_addr;
596 r->idiag_expires = jiffies_to_msecs(tmo);
597 r->idiag_rqueue = 0;
598 r->idiag_wqueue = 0;
599 r->idiag_uid = sock_i_uid(sk);
600 r->idiag_inode = 0;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300601#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300602 if (r->idiag_family == AF_INET6) {
603 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800604 &inet6_rsk(req)->loc_addr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300605 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800606 &inet6_rsk(req)->rmt_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 }
608#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700609 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
611 return skb->len;
612
613nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700614 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 return -1;
616}
617
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300618static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800619 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300621 struct inet_diag_entry entry;
622 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700623 struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo2ad69c52005-06-18 22:48:55 -0700624 struct listen_sock *lopt;
Nelson Elhage22e76c82010-11-03 16:35:41 +0000625 const struct nlattr *bc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 struct inet_sock *inet = inet_sk(sk);
627 int j, s_j;
628 int reqnum, s_reqnum;
629 int err = 0;
630
631 s_j = cb->args[3];
632 s_reqnum = cb->args[4];
633
634 if (s_j > 0)
635 s_j--;
636
637 entry.family = sk->sk_family;
638
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700639 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700641 lopt = icsk->icsk_accept_queue.listen_opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 if (!lopt || !lopt->qlen)
643 goto out;
644
Nelson Elhage22e76c82010-11-03 16:35:41 +0000645 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
646 bc = nlmsg_find_attr(cb->nlh, sizeof(*r),
647 INET_DIAG_REQ_BYTECODE);
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000648 entry.sport = inet->inet_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 entry.userlocks = sk->sk_userlocks;
650 }
651
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300652 for (j = s_j; j < lopt->nr_table_entries; j++) {
Arnaldo Carvalho de Melo60236fd2005-06-18 22:47:21 -0700653 struct request_sock *req, *head = lopt->syn_table[j];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
655 reqnum = 0;
656 for (req = head; req; reqnum++, req = req->dl_next) {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700657 struct inet_request_sock *ireq = inet_rsk(req);
658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 if (reqnum < s_reqnum)
660 continue;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300661 if (r->id.idiag_dport != ireq->rmt_port &&
662 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 continue;
664
665 if (bc) {
666 entry.saddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300667#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800669 inet6_rsk(req)->loc_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700671 &ireq->loc_addr;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800672 entry.daddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300673#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800675 inet6_rsk(req)->rmt_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700677 &ireq->rmt_addr;
678 entry.dport = ntohs(ireq->rmt_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
Nelson Elhage22e76c82010-11-03 16:35:41 +0000680 if (!inet_diag_bc_run(nla_data(bc),
681 nla_len(bc), &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 continue;
683 }
684
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300685 err = inet_diag_fill_req(skb, sk, req,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 NETLINK_CB(cb->skb).pid,
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300687 cb->nlh->nlmsg_seq, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 if (err < 0) {
689 cb->args[3] = j + 1;
690 cb->args[4] = reqnum;
691 goto out;
692 }
693 }
694
695 s_reqnum = 0;
696 }
697
698out:
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700699 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701 return err;
702}
703
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300704static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705{
706 int i, num;
707 int s_i, s_num;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300708 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300709 const struct inet_diag_handler *handler;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300710 struct inet_hashinfo *hashinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Herbert Xud523a322007-12-03 15:51:25 +1100712 handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
Arnaldo Carvalho de Melo8cf8e5a2008-01-28 20:52:12 -0800713 if (IS_ERR(handler))
714 goto unlock;
Herbert Xud523a322007-12-03 15:51:25 +1100715
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300716 hashinfo = handler->idiag_hashinfo;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800717
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 s_i = cb->args[1];
719 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 if (cb->args[0] == 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300722 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300724
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700725 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 struct sock *sk;
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800727 struct hlist_nulls_node *node;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800728 struct inet_listen_hashbucket *ilb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729
730 num = 0;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800731 ilb = &hashinfo->listening_hash[i];
732 spin_lock_bh(&ilb->lock);
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800733 sk_nulls_for_each(sk, node, &ilb->head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 struct inet_sock *inet = inet_sk(sk);
735
736 if (num < s_num) {
737 num++;
738 continue;
739 }
740
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000741 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300742 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 goto next_listen;
744
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300745 if (!(r->idiag_states & TCPF_LISTEN) ||
746 r->id.idiag_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 cb->args[3] > 0)
748 goto syn_recv;
749
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800750 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800751 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 goto done;
753 }
754
755syn_recv:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300756 if (!(r->idiag_states & TCPF_SYN_RECV))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 goto next_listen;
758
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300759 if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800760 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 goto done;
762 }
763
764next_listen:
765 cb->args[3] = 0;
766 cb->args[4] = 0;
767 ++num;
768 }
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800769 spin_unlock_bh(&ilb->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
771 s_num = 0;
772 cb->args[3] = 0;
773 cb->args[4] = 0;
774 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775skip_listen_ht:
776 cb->args[0] = 1;
777 s_i = num = s_num = 0;
778 }
779
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300780 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
Herbert Xud523a322007-12-03 15:51:25 +1100781 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Eric Dumazetf373b532009-10-09 00:16:19 +0000783 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300784 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
David S. Miller7e3aab42008-11-21 16:39:19 -0800785 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 struct sock *sk;
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800787 struct hlist_nulls_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Andi Kleen6be547a2008-08-28 01:09:54 -0700789 num = 0;
790
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800791 if (hlist_nulls_empty(&head->chain) &&
792 hlist_nulls_empty(&head->twchain))
Andi Kleen6be547a2008-08-28 01:09:54 -0700793 continue;
794
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 if (i > s_i)
796 s_num = 0;
797
David S. Miller7e3aab42008-11-21 16:39:19 -0800798 spin_lock_bh(lock);
Eric Dumazet3ab5aee2008-11-16 19:40:17 -0800799 sk_nulls_for_each(sk, node, &head->chain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 struct inet_sock *inet = inet_sk(sk);
801
802 if (num < s_num)
803 goto next_normal;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300804 if (!(r->idiag_states & (1 << sk->sk_state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 goto next_normal;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000806 if (r->id.idiag_sport != inet->inet_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300807 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 goto next_normal;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000809 if (r->id.idiag_dport != inet->inet_dport &&
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800810 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 goto next_normal;
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800812 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800813 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 goto done;
815 }
816next_normal:
817 ++num;
818 }
819
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300820 if (r->idiag_states & TCPF_TIME_WAIT) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800821 struct inet_timewait_sock *tw;
822
823 inet_twsk_for_each(tw, node,
Eric Dumazetdbca9b2752007-02-08 14:16:46 -0800824 &head->twchain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826 if (num < s_num)
827 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800828 if (r->id.idiag_sport != tw->tw_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300829 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800831 if (r->id.idiag_dport != tw->tw_dport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300832 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 goto next_dying;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800834 if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800835 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 goto done;
837 }
838next_dying:
839 ++num;
840 }
841 }
David S. Miller7e3aab42008-11-21 16:39:19 -0800842 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 }
844
845done:
846 cb->args[1] = i;
847 cb->args[2] = num;
Herbert Xud523a322007-12-03 15:51:25 +1100848unlock:
849 inet_diag_unlock_handler(handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 return skb->len;
851}
852
Thomas Grafead592b2007-03-22 23:30:35 -0700853static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854{
Thomas Grafead592b2007-03-22 23:30:35 -0700855 int hdrlen = sizeof(struct inet_diag_req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
Thomas Grafead592b2007-03-22 23:30:35 -0700857 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
858 nlmsg_len(nlh) < hdrlen)
859 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
David S. Millerb8f3ab42011-01-18 12:40:38 -0800861 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -0700862 if (nlmsg_attrlen(nlh, hdrlen)) {
863 struct nlattr *attr;
864
865 attr = nlmsg_find_attr(nlh, hdrlen,
866 INET_DIAG_REQ_BYTECODE);
867 if (attr == NULL ||
868 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
869 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
870 return -EINVAL;
871 }
872
Thomas Grafc702e802007-03-22 23:30:55 -0700873 return netlink_dump_start(idiagnl, skb, nlh,
874 inet_diag_dump, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 }
Thomas Grafead592b2007-03-22 23:30:35 -0700876
877 return inet_diag_get_exact(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878}
879
Patrick McHardy0a9c7302007-09-11 11:33:28 +0200880static DEFINE_MUTEX(inet_diag_mutex);
881
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700882static void inet_diag_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700884 mutex_lock(&inet_diag_mutex);
885 netlink_rcv_skb(skb, &inet_diag_rcv_msg);
886 mutex_unlock(&inet_diag_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887}
888
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300889int inet_diag_register(const struct inet_diag_handler *h)
890{
891 const __u16 type = h->idiag_type;
892 int err = -EINVAL;
893
894 if (type >= INET_DIAG_GETSOCK_MAX)
895 goto out;
896
Herbert Xud523a322007-12-03 15:51:25 +1100897 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300898 err = -EEXIST;
899 if (inet_diag_table[type] == NULL) {
900 inet_diag_table[type] = h;
901 err = 0;
902 }
Herbert Xud523a322007-12-03 15:51:25 +1100903 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300904out:
905 return err;
906}
907EXPORT_SYMBOL_GPL(inet_diag_register);
908
909void inet_diag_unregister(const struct inet_diag_handler *h)
910{
911 const __u16 type = h->idiag_type;
912
913 if (type >= INET_DIAG_GETSOCK_MAX)
914 return;
915
Herbert Xud523a322007-12-03 15:51:25 +1100916 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300917 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +1100918 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300919}
920EXPORT_SYMBOL_GPL(inet_diag_unregister);
921
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300922static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923{
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300924 const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
925 sizeof(struct inet_diag_handler *));
926 int err = -ENOMEM;
927
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700928 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300929 if (!inet_diag_table)
930 goto out;
931
Eric W. Biedermanb4b51022007-09-12 13:05:38 +0200932 idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0,
Herbert Xud523a322007-12-03 15:51:25 +1100933 inet_diag_rcv, NULL, THIS_MODULE);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300934 if (idiagnl == NULL)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300935 goto out_free_table;
Arnaldo Carvalho de Melo17b085e2005-08-12 12:59:17 -0300936 err = 0;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300937out:
938 return err;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300939out_free_table:
940 kfree(inet_diag_table);
941 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942}
943
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300944static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945{
Denis V. Lunevb7c6ba62008-01-28 14:41:19 -0800946 netlink_kernel_release(idiagnl);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300947 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948}
949
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300950module_init(inet_diag_init);
951module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952MODULE_LICENSE("GPL");
Jean Delvare305e1e92007-10-21 16:44:04 -0700953MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG);