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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>
17#include <linux/cache.h>
18#include <linux/init.h>
19#include <linux/time.h>
20
21#include <net/icmp.h>
22#include <net/tcp.h>
23#include <net/ipv6.h>
24#include <net/inet_common.h>
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -030025#include <net/inet_connection_sock.h>
26#include <net/inet_hashtables.h>
27#include <net/inet_timewait_sock.h>
28#include <net/inet6_hashtables.h>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070029#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31#include <linux/inet.h>
32#include <linux/stddef.h>
33
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -030034#include <linux/inet_diag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030036static const struct inet_diag_handler **inet_diag_table;
37
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030038struct inet_diag_entry {
Al Viro9f855292006-09-27 18:44:30 -070039 __be32 *saddr;
40 __be32 *daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 u16 sport;
42 u16 dport;
43 u16 family;
44 u16 userlocks;
45};
46
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030047static struct sock *idiagnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
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
54static const struct inet_diag_handler *inet_diag_lock_handler(int type)
55{
Herbert Xud523a322007-12-03 15:51:25 +110056 if (!inet_diag_table[type])
57 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
58 NETLINK_INET_DIAG, type);
Herbert Xud523a322007-12-03 15:51:25 +110059
60 mutex_lock(&inet_diag_table_mutex);
61 if (!inet_diag_table[type])
62 return ERR_PTR(-ENOENT);
63
64 return inet_diag_table[type];
65}
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,
74 struct sk_buff *skb,
75 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
76 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;
86
87 handler = inet_diag_table[unlh->nlmsg_type];
88 BUG_ON(handler == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -030090 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 nlh->nlmsg_flags = nlmsg_flags;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030092
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 r = NLMSG_DATA(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080094 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -080095
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080096 if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
97 minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
98
99 if (ext & (1 << (INET_DIAG_INFO - 1)))
100 info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
101 handler->idiag_info_size);
102
103 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
104 const size_t len = strlen(icsk->icsk_ca_ops->name);
105
106 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
107 icsk->icsk_ca_ops->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 }
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800109
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300110 r->idiag_family = sk->sk_family;
111 r->idiag_state = sk->sk_state;
112 r->idiag_timer = 0;
113 r->idiag_retrans = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300115 r->id.idiag_if = sk->sk_bound_dev_if;
116 r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
117 r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300119 r->id.idiag_sport = inet->sport;
120 r->id.idiag_dport = inet->dport;
121 r->id.idiag_src[0] = inet->rcv_saddr;
122 r->id.idiag_dst[0] = inet->daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300124#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300125 if (r->idiag_family == AF_INET6) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 struct ipv6_pinfo *np = inet6_sk(sk);
127
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300128 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 &np->rcv_saddr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300130 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 &np->daddr);
132 }
133#endif
134
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700135#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700137 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300138 r->idiag_timer = 1;
139 r->idiag_retrans = icsk->icsk_retransmits;
140 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700141 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300142 r->idiag_timer = 4;
143 r->idiag_retrans = icsk->icsk_probes_out;
144 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300146 r->idiag_timer = 2;
147 r->idiag_retrans = icsk->icsk_probes_out;
148 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300150 r->idiag_timer = 0;
151 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 }
153#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300154
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300155 r->idiag_uid = sock_i_uid(sk);
156 r->idiag_inode = sock_i_ino(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158 if (minfo) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300159 minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
160 minfo->idiag_wmem = sk->sk_wmem_queued;
161 minfo->idiag_fmem = sk->sk_forward_alloc;
162 minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 }
164
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300165 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Arnaldo Carvalho de Melo6687e982005-08-10 04:03:31 -0300167 if (sk->sk_state < TCP_TIME_WAIT &&
168 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
169 icsk->icsk_ca_ops->get_info(sk, ext, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700171 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 return skb->len;
173
Stephen Hemminger7c99c902005-06-23 12:20:36 -0700174rtattr_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700176 nlmsg_trim(skb, b);
Patrick McHardy26932562007-01-31 23:16:40 -0800177 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178}
179
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800180static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
181 struct sk_buff *skb, int ext, u32 pid,
182 u32 seq, u16 nlmsg_flags,
183 const struct nlmsghdr *unlh)
184{
185 long tmo;
186 struct inet_diag_msg *r;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700187 const unsigned char *previous_tail = skb_tail_pointer(skb);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800188 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
189 unlh->nlmsg_type, sizeof(*r));
190
191 r = NLMSG_DATA(nlh);
192 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
193
194 nlh->nlmsg_flags = nlmsg_flags;
195
196 tmo = tw->tw_ttd - jiffies;
197 if (tmo < 0)
198 tmo = 0;
199
200 r->idiag_family = tw->tw_family;
201 r->idiag_state = tw->tw_state;
202 r->idiag_timer = 0;
203 r->idiag_retrans = 0;
204 r->id.idiag_if = tw->tw_bound_dev_if;
205 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
206 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
207 r->id.idiag_sport = tw->tw_sport;
208 r->id.idiag_dport = tw->tw_dport;
209 r->id.idiag_src[0] = tw->tw_rcv_saddr;
210 r->id.idiag_dst[0] = tw->tw_daddr;
211 r->idiag_state = tw->tw_substate;
212 r->idiag_timer = 3;
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700213 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800214 r->idiag_rqueue = 0;
215 r->idiag_wqueue = 0;
216 r->idiag_uid = 0;
217 r->idiag_inode = 0;
218#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
219 if (tw->tw_family == AF_INET6) {
220 const struct inet6_timewait_sock *tw6 =
221 inet6_twsk((struct sock *)tw);
222
223 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
224 &tw6->tw_v6_rcv_saddr);
225 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
226 &tw6->tw_v6_daddr);
227 }
228#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700229 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800230 return skb->len;
231nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700232 nlmsg_trim(skb, previous_tail);
Patrick McHardy26932562007-01-31 23:16:40 -0800233 return -EMSGSIZE;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800234}
235
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800236static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
237 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
238 const struct nlmsghdr *unlh)
239{
240 if (sk->sk_state == TCP_TIME_WAIT)
241 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
242 skb, ext, pid, seq, nlmsg_flags,
243 unlh);
244 return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
245}
246
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800247static int inet_diag_get_exact(struct sk_buff *in_skb,
248 const struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
250 int err;
251 struct sock *sk;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300252 struct inet_diag_req *req = NLMSG_DATA(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 struct sk_buff *rep;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300254 struct inet_hashinfo *hashinfo;
255 const struct inet_diag_handler *handler;
256
Herbert Xud523a322007-12-03 15:51:25 +1100257 handler = inet_diag_lock_handler(nlh->nlmsg_type);
Arnaldo Carvalho de Melo8cf8e5a2008-01-28 20:52:12 -0800258 if (IS_ERR(handler)) {
259 err = PTR_ERR(handler);
260 goto unlock;
261 }
Herbert Xud523a322007-12-03 15:51:25 +1100262
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300263 hashinfo = handler->idiag_hashinfo;
Herbert Xud523a322007-12-03 15:51:25 +1100264 err = -EINVAL;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300265
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300266 if (req->idiag_family == AF_INET) {
Pavel Emelyanovc67499c2008-01-31 05:06:40 -0800267 sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0],
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300268 req->id.idiag_dport, req->id.idiag_src[0],
269 req->id.idiag_sport, req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 }
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300271#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300272 else if (req->idiag_family == AF_INET6) {
Pavel Emelyanovd86e0da2008-01-31 05:07:21 -0800273 sk = inet6_lookup(&init_net, hashinfo,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300274 (struct in6_addr *)req->id.idiag_dst,
275 req->id.idiag_dport,
276 (struct in6_addr *)req->id.idiag_src,
277 req->id.idiag_sport,
278 req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 }
280#endif
281 else {
Herbert Xud523a322007-12-03 15:51:25 +1100282 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 }
284
Herbert Xud523a322007-12-03 15:51:25 +1100285 err = -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 if (sk == NULL)
Herbert Xud523a322007-12-03 15:51:25 +1100287 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289 err = -ESTALE;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300290 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
291 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
292 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
293 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 goto out;
295
296 err = -ENOMEM;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300297 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
298 sizeof(struct inet_diag_meminfo) +
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300299 handler->idiag_info_size + 64)),
300 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 if (!rep)
302 goto out;
303
Patrick McHardy26932562007-01-31 23:16:40 -0800304 err = sk_diag_fill(sk, rep, req->idiag_ext,
305 NETLINK_CB(in_skb).pid,
306 nlh->nlmsg_seq, 0, nlh);
307 if (err < 0) {
308 WARN_ON(err == -EMSGSIZE);
309 kfree_skb(rep);
310 goto out;
311 }
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300312 err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
313 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 if (err > 0)
315 err = 0;
316
317out:
318 if (sk) {
319 if (sk->sk_state == TCP_TIME_WAIT)
Arnaldo Carvalho de Melo8feaf0c2005-08-09 20:09:30 -0700320 inet_twsk_put((struct inet_timewait_sock *)sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 else
322 sock_put(sk);
323 }
Herbert Xud523a322007-12-03 15:51:25 +1100324unlock:
325 inet_diag_unlock_handler(handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 return err;
327}
328
Al Viro9f855292006-09-27 18:44:30 -0700329static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 int words = bits >> 5;
332
333 bits &= 0x1f;
334
335 if (words) {
336 if (memcmp(a1, a2, words << 2))
337 return 0;
338 }
339 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700340 __be32 w1, w2;
341 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 w1 = a1[words];
344 w2 = a2[words];
345
346 mask = htonl((0xffffffff) << (32 - bits));
347
348 if ((w1 ^ w2) & mask)
349 return 0;
350 }
351
352 return 1;
353}
354
355
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300356static int inet_diag_bc_run(const void *bc, int len,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800357 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{
359 while (len > 0) {
360 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300361 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300364 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300366 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 yes = 0;
368 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300369 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 yes = entry->sport >= op[1].no;
371 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300372 case INET_DIAG_BC_S_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 yes = entry->dport <= op[1].no;
374 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300375 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 yes = entry->dport >= op[1].no;
377 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300378 case INET_DIAG_BC_D_LE:
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_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
383 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300384 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300385 case INET_DIAG_BC_D_COND: {
386 struct inet_diag_hostcond *cond;
Al Viro9f855292006-09-27 18:44:30 -0700387 __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300389 cond = (struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300391 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 entry->sport : entry->dport)) {
393 yes = 0;
394 break;
395 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 if (cond->prefix_len == 0)
398 break;
399
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300400 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 addr = entry->saddr;
402 else
403 addr = entry->daddr;
404
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800405 if (bitstring_match(addr, cond->addr,
406 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 break;
408 if (entry->family == AF_INET6 &&
409 cond->family == AF_INET) {
410 if (addr[0] == 0 && addr[1] == 0 &&
411 addr[2] == htonl(0xffff) &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300412 bitstring_match(addr + 3, cond->addr,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900413 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 break;
415 }
416 yes = 0;
417 break;
418 }
419 }
420
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800421 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 len -= op->yes;
423 bc += op->yes;
424 } else {
425 len -= op->no;
426 bc += op->no;
427 }
428 }
429 return (len == 0);
430}
431
432static int valid_cc(const void *bc, int len, int cc)
433{
434 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300435 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
437 if (cc > len)
438 return 0;
439 if (cc == len)
440 return 1;
441 if (op->yes < 4)
442 return 0;
443 len -= op->yes;
444 bc += op->yes;
445 }
446 return 0;
447}
448
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300449static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450{
451 const unsigned char *bc = bytecode;
452 int len = bytecode_len;
453
454 while (len > 0) {
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300455 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
458 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300459 case INET_DIAG_BC_AUTO:
460 case INET_DIAG_BC_S_COND:
461 case INET_DIAG_BC_D_COND:
462 case INET_DIAG_BC_S_GE:
463 case INET_DIAG_BC_S_LE:
464 case INET_DIAG_BC_D_GE:
465 case INET_DIAG_BC_D_LE:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300466 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 return -EINVAL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300468 case INET_DIAG_BC_JMP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300469 if (op->no < 4 || op->no > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 return -EINVAL;
471 if (op->no < len &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300472 !valid_cc(bytecode, bytecode_len, len - op->no))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 return -EINVAL;
474 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300475 case INET_DIAG_BC_NOP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300476 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 return -EINVAL;
478 break;
479 default:
480 return -EINVAL;
481 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800482 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 len -= op->yes;
484 }
485 return len == 0 ? 0 : -EINVAL;
486}
487
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800488static int inet_csk_diag_dump(struct sock *sk,
489 struct sk_buff *skb,
490 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300492 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
494 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300495 struct inet_diag_entry entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 struct rtattr *bc = (struct rtattr *)(r + 1);
497 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 {
509 entry.saddr = &inet->rcv_saddr;
510 entry.daddr = &inet->daddr;
511 }
512 entry.sport = inet->num;
513 entry.dport = ntohs(inet->dport);
514 entry.userlocks = sk->sk_userlocks;
515
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300516 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 return 0;
518 }
519
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800520 return inet_csk_diag_fill(sk, skb, r->idiag_ext,
521 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,
527 struct netlink_callback *cb)
528{
529 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
530
531 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
532 struct inet_diag_entry entry;
533 struct rtattr *bc = (struct rtattr *)(r + 1);
534
535 entry.family = tw->tw_family;
536#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
537 if (tw->tw_family == AF_INET6) {
538 struct inet6_timewait_sock *tw6 =
539 inet6_twsk((struct sock *)tw);
540 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
541 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
542 } else
543#endif
544 {
545 entry.saddr = &tw->tw_rcv_saddr;
546 entry.daddr = &tw->tw_daddr;
547 }
548 entry.sport = tw->tw_num;
549 entry.dport = ntohs(tw->tw_dport);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900550 entry.userlocks = 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800551
552 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
553 return 0;
554 }
555
556 return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
557 NETLINK_CB(cb->skb).pid,
558 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
559}
560
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300561static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800562 struct request_sock *req, u32 pid, u32 seq,
563 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564{
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700565 const struct inet_request_sock *ireq = inet_rsk(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700567 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300568 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 struct nlmsghdr *nlh;
570 long tmo;
571
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300572 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 nlh->nlmsg_flags = NLM_F_MULTI;
574 r = NLMSG_DATA(nlh);
575
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300576 r->idiag_family = sk->sk_family;
577 r->idiag_state = TCP_SYN_RECV;
578 r->idiag_timer = 1;
579 r->idiag_retrans = req->retrans;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300581 r->id.idiag_if = sk->sk_bound_dev_if;
582 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
583 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584
585 tmo = req->expires - jiffies;
586 if (tmo < 0)
587 tmo = 0;
588
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300589 r->id.idiag_sport = inet->sport;
590 r->id.idiag_dport = ireq->rmt_port;
591 r->id.idiag_src[0] = ireq->loc_addr;
592 r->id.idiag_dst[0] = ireq->rmt_addr;
593 r->idiag_expires = jiffies_to_msecs(tmo);
594 r->idiag_rqueue = 0;
595 r->idiag_wqueue = 0;
596 r->idiag_uid = sock_i_uid(sk);
597 r->idiag_inode = 0;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300598#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300599 if (r->idiag_family == AF_INET6) {
600 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800601 &inet6_rsk(req)->loc_addr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300602 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800603 &inet6_rsk(req)->rmt_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 }
605#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700606 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 return skb->len;
609
610nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700611 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 return -1;
613}
614
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300615static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800616 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300618 struct inet_diag_entry entry;
619 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700620 struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo2ad69c52005-06-18 22:48:55 -0700621 struct listen_sock *lopt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 struct rtattr *bc = NULL;
623 struct inet_sock *inet = inet_sk(sk);
624 int j, s_j;
625 int reqnum, s_reqnum;
626 int err = 0;
627
628 s_j = cb->args[3];
629 s_reqnum = cb->args[4];
630
631 if (s_j > 0)
632 s_j--;
633
634 entry.family = sk->sk_family;
635
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700636 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700638 lopt = icsk->icsk_accept_queue.listen_opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 if (!lopt || !lopt->qlen)
640 goto out;
641
642 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
643 bc = (struct rtattr *)(r + 1);
644 entry.sport = inet->num;
645 entry.userlocks = sk->sk_userlocks;
646 }
647
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300648 for (j = s_j; j < lopt->nr_table_entries; j++) {
Arnaldo Carvalho de Melo60236fd2005-06-18 22:47:21 -0700649 struct request_sock *req, *head = lopt->syn_table[j];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
651 reqnum = 0;
652 for (req = head; req; reqnum++, req = req->dl_next) {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700653 struct inet_request_sock *ireq = inet_rsk(req);
654
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 if (reqnum < s_reqnum)
656 continue;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300657 if (r->id.idiag_dport != ireq->rmt_port &&
658 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 continue;
660
661 if (bc) {
662 entry.saddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300663#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800665 inet6_rsk(req)->loc_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700667 &ireq->loc_addr;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800668 entry.daddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300669#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800671 inet6_rsk(req)->rmt_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700673 &ireq->rmt_addr;
674 entry.dport = ntohs(ireq->rmt_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300676 if (!inet_diag_bc_run(RTA_DATA(bc),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 RTA_PAYLOAD(bc), &entry))
678 continue;
679 }
680
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300681 err = inet_diag_fill_req(skb, sk, req,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 NETLINK_CB(cb->skb).pid,
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300683 cb->nlh->nlmsg_seq, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 if (err < 0) {
685 cb->args[3] = j + 1;
686 cb->args[4] = reqnum;
687 goto out;
688 }
689 }
690
691 s_reqnum = 0;
692 }
693
694out:
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700695 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 return err;
698}
699
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300700static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701{
702 int i, num;
703 int s_i, s_num;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300704 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300705 const struct inet_diag_handler *handler;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300706 struct inet_hashinfo *hashinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Herbert Xud523a322007-12-03 15:51:25 +1100708 handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
Arnaldo Carvalho de Melo8cf8e5a2008-01-28 20:52:12 -0800709 if (IS_ERR(handler))
710 goto unlock;
Herbert Xud523a322007-12-03 15:51:25 +1100711
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300712 hashinfo = handler->idiag_hashinfo;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 s_i = cb->args[1];
715 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300716
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 if (cb->args[0] == 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300718 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300720
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700721 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 struct sock *sk;
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800723 struct hlist_nulls_node *node;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800724 struct inet_listen_hashbucket *ilb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
726 num = 0;
Eric Dumazet5caea4e2008-11-20 00:40:07 -0800727 ilb = &hashinfo->listening_hash[i];
728 spin_lock_bh(&ilb->lock);
Eric Dumazetc25eb3b2008-11-23 17:22:55 -0800729 sk_nulls_for_each(sk, node, &ilb->head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 struct inet_sock *inet = inet_sk(sk);
731
732 if (num < s_num) {
733 num++;
734 continue;
735 }
736
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300737 if (r->id.idiag_sport != inet->sport &&
738 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
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800746 if (inet_csk_diag_dump(sk, skb, cb) < 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
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300755 if (inet_diag_dump_reqs(skb, sk, cb) < 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
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300779 for (i = s_i; i < hashinfo->ehash_size; i++) {
780 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;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300802 if (r->id.idiag_sport != inet->sport &&
803 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 goto next_normal;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800805 if (r->id.idiag_dport != inet->dport &&
806 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 goto next_normal;
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800808 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800809 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 goto done;
811 }
812next_normal:
813 ++num;
814 }
815
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300816 if (r->idiag_states & TCPF_TIME_WAIT) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800817 struct inet_timewait_sock *tw;
818
819 inet_twsk_for_each(tw, node,
Eric Dumazetdbca9b2752007-02-08 14:16:46 -0800820 &head->twchain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 if (num < s_num)
823 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800824 if (r->id.idiag_sport != tw->tw_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300825 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800827 if (r->id.idiag_dport != tw->tw_dport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300828 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 goto next_dying;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800830 if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
David S. Miller7e3aab42008-11-21 16:39:19 -0800831 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 goto done;
833 }
834next_dying:
835 ++num;
836 }
837 }
David S. Miller7e3aab42008-11-21 16:39:19 -0800838 spin_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 }
840
841done:
842 cb->args[1] = i;
843 cb->args[2] = num;
Herbert Xud523a322007-12-03 15:51:25 +1100844unlock:
845 inet_diag_unlock_handler(handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 return skb->len;
847}
848
Thomas Grafead592b2007-03-22 23:30:35 -0700849static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850{
Thomas Grafead592b2007-03-22 23:30:35 -0700851 int hdrlen = sizeof(struct inet_diag_req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Thomas Grafead592b2007-03-22 23:30:35 -0700853 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
854 nlmsg_len(nlh) < hdrlen)
855 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
Thomas Grafead592b2007-03-22 23:30:35 -0700857 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -0700858 if (nlmsg_attrlen(nlh, hdrlen)) {
859 struct nlattr *attr;
860
861 attr = nlmsg_find_attr(nlh, hdrlen,
862 INET_DIAG_REQ_BYTECODE);
863 if (attr == NULL ||
864 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
865 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
866 return -EINVAL;
867 }
868
Thomas Grafc702e802007-03-22 23:30:55 -0700869 return netlink_dump_start(idiagnl, skb, nlh,
870 inet_diag_dump, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 }
Thomas Grafead592b2007-03-22 23:30:35 -0700872
873 return inet_diag_get_exact(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874}
875
Patrick McHardy0a9c7302007-09-11 11:33:28 +0200876static DEFINE_MUTEX(inet_diag_mutex);
877
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700878static void inet_diag_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700880 mutex_lock(&inet_diag_mutex);
881 netlink_rcv_skb(skb, &inet_diag_rcv_msg);
882 mutex_unlock(&inet_diag_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883}
884
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300885int inet_diag_register(const struct inet_diag_handler *h)
886{
887 const __u16 type = h->idiag_type;
888 int err = -EINVAL;
889
890 if (type >= INET_DIAG_GETSOCK_MAX)
891 goto out;
892
Herbert Xud523a322007-12-03 15:51:25 +1100893 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300894 err = -EEXIST;
895 if (inet_diag_table[type] == NULL) {
896 inet_diag_table[type] = h;
897 err = 0;
898 }
Herbert Xud523a322007-12-03 15:51:25 +1100899 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300900out:
901 return err;
902}
903EXPORT_SYMBOL_GPL(inet_diag_register);
904
905void inet_diag_unregister(const struct inet_diag_handler *h)
906{
907 const __u16 type = h->idiag_type;
908
909 if (type >= INET_DIAG_GETSOCK_MAX)
910 return;
911
Herbert Xud523a322007-12-03 15:51:25 +1100912 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300913 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +1100914 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300915}
916EXPORT_SYMBOL_GPL(inet_diag_unregister);
917
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300918static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919{
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300920 const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
921 sizeof(struct inet_diag_handler *));
922 int err = -ENOMEM;
923
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700924 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300925 if (!inet_diag_table)
926 goto out;
927
Eric W. Biedermanb4b51022007-09-12 13:05:38 +0200928 idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0,
Herbert Xud523a322007-12-03 15:51:25 +1100929 inet_diag_rcv, NULL, THIS_MODULE);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300930 if (idiagnl == NULL)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300931 goto out_free_table;
Arnaldo Carvalho de Melo17b085e2005-08-12 12:59:17 -0300932 err = 0;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300933out:
934 return err;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300935out_free_table:
936 kfree(inet_diag_table);
937 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938}
939
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300940static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941{
Denis V. Lunevb7c6ba62008-01-28 14:41:19 -0800942 netlink_kernel_release(idiagnl);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300943 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944}
945
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300946module_init(inet_diag_init);
947module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948MODULE_LICENSE("GPL");
Jean Delvare305e1e92007-10-21 16:44:04 -0700949MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG);