blob: 605ed2cd79724b461e933ed4e00ca694f0797bf9 [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 *
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -03004 * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
6 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
Ilpo Järvinen172589c2007-08-28 15:50:33 -070014#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/fcntl.h>
18#include <linux/random.h>
19#include <linux/cache.h>
20#include <linux/init.h>
21#include <linux/time.h>
22
23#include <net/icmp.h>
24#include <net/tcp.h>
25#include <net/ipv6.h>
26#include <net/inet_common.h>
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -030027#include <net/inet_connection_sock.h>
28#include <net/inet_hashtables.h>
29#include <net/inet_timewait_sock.h>
30#include <net/inet6_hashtables.h>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070031#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33#include <linux/inet.h>
34#include <linux/stddef.h>
35
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -030036#include <linux/inet_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 -030049static struct sock *idiagnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030051#define INET_DIAG_PUT(skb, attrtype, attrlen) \
Stephen Hemminger7c99c902005-06-23 12:20:36 -070052 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Herbert Xud523a322007-12-03 15:51:25 +110054static DEFINE_MUTEX(inet_diag_table_mutex);
55
56static const struct inet_diag_handler *inet_diag_lock_handler(int type)
57{
58#ifdef CONFIG_KMOD
59 if (!inet_diag_table[type])
60 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
61 NETLINK_INET_DIAG, type);
62#endif
63
64 mutex_lock(&inet_diag_table_mutex);
65 if (!inet_diag_table[type])
66 return ERR_PTR(-ENOENT);
67
68 return inet_diag_table[type];
69}
70
71static inline void inet_diag_unlock_handler(
72 const struct inet_diag_handler *handler)
73{
74 mutex_unlock(&inet_diag_table_mutex);
75}
76
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -080077static int inet_csk_diag_fill(struct sock *sk,
78 struct sk_buff *skb,
79 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
80 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -070081{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070082 const struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070083 const struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030084 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 struct nlmsghdr *nlh;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030086 void *info = NULL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030087 struct inet_diag_meminfo *minfo = NULL;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -070088 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030089 const struct inet_diag_handler *handler;
90
91 handler = inet_diag_table[unlh->nlmsg_type];
92 BUG_ON(handler == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -030094 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 nlh->nlmsg_flags = nlmsg_flags;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030096
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 r = NLMSG_DATA(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080098 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -080099
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800100 if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
101 minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
102
103 if (ext & (1 << (INET_DIAG_INFO - 1)))
104 info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
105 handler->idiag_info_size);
106
107 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
108 const size_t len = strlen(icsk->icsk_ca_ops->name);
109
110 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
111 icsk->icsk_ca_ops->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 }
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800113
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300114 r->idiag_family = sk->sk_family;
115 r->idiag_state = sk->sk_state;
116 r->idiag_timer = 0;
117 r->idiag_retrans = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300119 r->id.idiag_if = sk->sk_bound_dev_if;
120 r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
121 r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300123 r->id.idiag_sport = inet->sport;
124 r->id.idiag_dport = inet->dport;
125 r->id.idiag_src[0] = inet->rcv_saddr;
126 r->id.idiag_dst[0] = inet->daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300128#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300129 if (r->idiag_family == AF_INET6) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 struct ipv6_pinfo *np = inet6_sk(sk);
131
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300132 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 &np->rcv_saddr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300134 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 &np->daddr);
136 }
137#endif
138
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700139#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700141 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300142 r->idiag_timer = 1;
143 r->idiag_retrans = icsk->icsk_retransmits;
144 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700145 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300146 r->idiag_timer = 4;
147 r->idiag_retrans = icsk->icsk_probes_out;
148 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300150 r->idiag_timer = 2;
151 r->idiag_retrans = icsk->icsk_probes_out;
152 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300154 r->idiag_timer = 0;
155 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 }
157#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300158
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300159 r->idiag_uid = sock_i_uid(sk);
160 r->idiag_inode = sock_i_ino(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162 if (minfo) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300163 minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
164 minfo->idiag_wmem = sk->sk_wmem_queued;
165 minfo->idiag_fmem = sk->sk_forward_alloc;
166 minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 }
168
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300169 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Arnaldo Carvalho de Melo6687e982005-08-10 04:03:31 -0300171 if (sk->sk_state < TCP_TIME_WAIT &&
172 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
173 icsk->icsk_ca_ops->get_info(sk, ext, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700175 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 return skb->len;
177
Stephen Hemminger7c99c902005-06-23 12:20:36 -0700178rtattr_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700180 nlmsg_trim(skb, b);
Patrick McHardy26932562007-01-31 23:16:40 -0800181 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182}
183
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800184static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
185 struct sk_buff *skb, int ext, u32 pid,
186 u32 seq, u16 nlmsg_flags,
187 const struct nlmsghdr *unlh)
188{
189 long tmo;
190 struct inet_diag_msg *r;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700191 const unsigned char *previous_tail = skb_tail_pointer(skb);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800192 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
193 unlh->nlmsg_type, sizeof(*r));
194
195 r = NLMSG_DATA(nlh);
196 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
197
198 nlh->nlmsg_flags = nlmsg_flags;
199
200 tmo = tw->tw_ttd - jiffies;
201 if (tmo < 0)
202 tmo = 0;
203
204 r->idiag_family = tw->tw_family;
205 r->idiag_state = tw->tw_state;
206 r->idiag_timer = 0;
207 r->idiag_retrans = 0;
208 r->id.idiag_if = tw->tw_bound_dev_if;
209 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
210 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
211 r->id.idiag_sport = tw->tw_sport;
212 r->id.idiag_dport = tw->tw_dport;
213 r->id.idiag_src[0] = tw->tw_rcv_saddr;
214 r->id.idiag_dst[0] = tw->tw_daddr;
215 r->idiag_state = tw->tw_substate;
216 r->idiag_timer = 3;
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700217 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800218 r->idiag_rqueue = 0;
219 r->idiag_wqueue = 0;
220 r->idiag_uid = 0;
221 r->idiag_inode = 0;
222#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
223 if (tw->tw_family == AF_INET6) {
224 const struct inet6_timewait_sock *tw6 =
225 inet6_twsk((struct sock *)tw);
226
227 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
228 &tw6->tw_v6_rcv_saddr);
229 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
230 &tw6->tw_v6_daddr);
231 }
232#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700233 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800234 return skb->len;
235nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700236 nlmsg_trim(skb, previous_tail);
Patrick McHardy26932562007-01-31 23:16:40 -0800237 return -EMSGSIZE;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800238}
239
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800240static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
241 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
242 const struct nlmsghdr *unlh)
243{
244 if (sk->sk_state == TCP_TIME_WAIT)
245 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
246 skb, ext, pid, seq, nlmsg_flags,
247 unlh);
248 return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
249}
250
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800251static int inet_diag_get_exact(struct sk_buff *in_skb,
252 const struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
254 int err;
255 struct sock *sk;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300256 struct inet_diag_req *req = NLMSG_DATA(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 struct sk_buff *rep;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300258 struct inet_hashinfo *hashinfo;
259 const struct inet_diag_handler *handler;
260
Herbert Xud523a322007-12-03 15:51:25 +1100261 handler = inet_diag_lock_handler(nlh->nlmsg_type);
262 if (!handler)
263 return -ENOENT;
264
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300265 hashinfo = handler->idiag_hashinfo;
Herbert Xud523a322007-12-03 15:51:25 +1100266 err = -EINVAL;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300267
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300268 if (req->idiag_family == AF_INET) {
269 sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
270 req->id.idiag_dport, req->id.idiag_src[0],
271 req->id.idiag_sport, req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 }
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300273#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300274 else if (req->idiag_family == AF_INET6) {
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300275 sk = inet6_lookup(hashinfo,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300276 (struct in6_addr *)req->id.idiag_dst,
277 req->id.idiag_dport,
278 (struct in6_addr *)req->id.idiag_src,
279 req->id.idiag_sport,
280 req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 }
282#endif
283 else {
Herbert Xud523a322007-12-03 15:51:25 +1100284 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 }
286
Herbert Xud523a322007-12-03 15:51:25 +1100287 err = -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 if (sk == NULL)
Herbert Xud523a322007-12-03 15:51:25 +1100289 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
291 err = -ESTALE;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300292 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
293 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
294 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
295 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 goto out;
297
298 err = -ENOMEM;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300299 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
300 sizeof(struct inet_diag_meminfo) +
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300301 handler->idiag_info_size + 64)),
302 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 if (!rep)
304 goto out;
305
Patrick McHardy26932562007-01-31 23:16:40 -0800306 err = sk_diag_fill(sk, rep, req->idiag_ext,
307 NETLINK_CB(in_skb).pid,
308 nlh->nlmsg_seq, 0, nlh);
309 if (err < 0) {
310 WARN_ON(err == -EMSGSIZE);
311 kfree_skb(rep);
312 goto out;
313 }
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300314 err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
315 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 if (err > 0)
317 err = 0;
318
319out:
320 if (sk) {
321 if (sk->sk_state == TCP_TIME_WAIT)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700322 inet_twsk_put((struct inet_timewait_sock *)sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 else
324 sock_put(sk);
325 }
Herbert Xud523a322007-12-03 15:51:25 +1100326unlock:
327 inet_diag_unlock_handler(handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 return err;
329}
330
Al Viro9f855292006-09-27 18:44:30 -0700331static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
333 int words = bits >> 5;
334
335 bits &= 0x1f;
336
337 if (words) {
338 if (memcmp(a1, a2, words << 2))
339 return 0;
340 }
341 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700342 __be32 w1, w2;
343 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345 w1 = a1[words];
346 w2 = a2[words];
347
348 mask = htonl((0xffffffff) << (32 - bits));
349
350 if ((w1 ^ w2) & mask)
351 return 0;
352 }
353
354 return 1;
355}
356
357
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300358static int inet_diag_bc_run(const void *bc, int len,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800359 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360{
361 while (len > 0) {
362 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300363 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300366 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300368 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 yes = 0;
370 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300371 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 yes = entry->sport >= op[1].no;
373 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300374 case INET_DIAG_BC_S_LE:
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_GE:
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_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 yes = entry->dport <= op[1].no;
382 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300383 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
385 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300386 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300387 case INET_DIAG_BC_D_COND: {
388 struct inet_diag_hostcond *cond;
Al Viro9f855292006-09-27 18:44:30 -0700389 __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300391 cond = (struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300393 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 entry->sport : entry->dport)) {
395 yes = 0;
396 break;
397 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 if (cond->prefix_len == 0)
400 break;
401
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300402 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 addr = entry->saddr;
404 else
405 addr = entry->daddr;
406
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800407 if (bitstring_match(addr, cond->addr,
408 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 break;
410 if (entry->family == AF_INET6 &&
411 cond->family == AF_INET) {
412 if (addr[0] == 0 && addr[1] == 0 &&
413 addr[2] == htonl(0xffff) &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300414 bitstring_match(addr + 3, cond->addr,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900415 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 break;
417 }
418 yes = 0;
419 break;
420 }
421 }
422
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800423 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 len -= op->yes;
425 bc += op->yes;
426 } else {
427 len -= op->no;
428 bc += op->no;
429 }
430 }
431 return (len == 0);
432}
433
434static int valid_cc(const void *bc, int len, int cc)
435{
436 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300437 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439 if (cc > len)
440 return 0;
441 if (cc == len)
442 return 1;
443 if (op->yes < 4)
444 return 0;
445 len -= op->yes;
446 bc += op->yes;
447 }
448 return 0;
449}
450
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300451static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452{
453 const unsigned char *bc = bytecode;
454 int len = bytecode_len;
455
456 while (len > 0) {
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300457 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
459//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
460 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300461 case INET_DIAG_BC_AUTO:
462 case INET_DIAG_BC_S_COND:
463 case INET_DIAG_BC_D_COND:
464 case INET_DIAG_BC_S_GE:
465 case INET_DIAG_BC_S_LE:
466 case INET_DIAG_BC_D_GE:
467 case INET_DIAG_BC_D_LE:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300468 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return -EINVAL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300470 case INET_DIAG_BC_JMP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300471 if (op->no < 4 || op->no > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 return -EINVAL;
473 if (op->no < len &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300474 !valid_cc(bytecode, bytecode_len, len - op->no))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 return -EINVAL;
476 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300477 case INET_DIAG_BC_NOP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300478 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 return -EINVAL;
480 break;
481 default:
482 return -EINVAL;
483 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800484 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 len -= op->yes;
486 }
487 return len == 0 ? 0 : -EINVAL;
488}
489
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800490static int inet_csk_diag_dump(struct sock *sk,
491 struct sk_buff *skb,
492 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300494 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
496 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300497 struct inet_diag_entry entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 struct rtattr *bc = (struct rtattr *)(r + 1);
499 struct inet_sock *inet = inet_sk(sk);
500
501 entry.family = sk->sk_family;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300502#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 if (entry.family == AF_INET6) {
504 struct ipv6_pinfo *np = inet6_sk(sk);
505
506 entry.saddr = np->rcv_saddr.s6_addr32;
507 entry.daddr = np->daddr.s6_addr32;
508 } else
509#endif
510 {
511 entry.saddr = &inet->rcv_saddr;
512 entry.daddr = &inet->daddr;
513 }
514 entry.sport = inet->num;
515 entry.dport = ntohs(inet->dport);
516 entry.userlocks = sk->sk_userlocks;
517
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300518 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 return 0;
520 }
521
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800522 return inet_csk_diag_fill(sk, skb, r->idiag_ext,
523 NETLINK_CB(cb->skb).pid,
524 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525}
526
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800527static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
528 struct sk_buff *skb,
529 struct netlink_callback *cb)
530{
531 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
532
533 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
534 struct inet_diag_entry entry;
535 struct rtattr *bc = (struct rtattr *)(r + 1);
536
537 entry.family = tw->tw_family;
538#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
539 if (tw->tw_family == AF_INET6) {
540 struct inet6_timewait_sock *tw6 =
541 inet6_twsk((struct sock *)tw);
542 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
543 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
544 } else
545#endif
546 {
547 entry.saddr = &tw->tw_rcv_saddr;
548 entry.daddr = &tw->tw_daddr;
549 }
550 entry.sport = tw->tw_num;
551 entry.dport = ntohs(tw->tw_dport);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900552 entry.userlocks = 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800553
554 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
555 return 0;
556 }
557
558 return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
559 NETLINK_CB(cb->skb).pid,
560 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
561}
562
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300563static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800564 struct request_sock *req, u32 pid, u32 seq,
565 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566{
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700567 const struct inet_request_sock *ireq = inet_rsk(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700569 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300570 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 struct nlmsghdr *nlh;
572 long tmo;
573
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300574 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 nlh->nlmsg_flags = NLM_F_MULTI;
576 r = NLMSG_DATA(nlh);
577
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300578 r->idiag_family = sk->sk_family;
579 r->idiag_state = TCP_SYN_RECV;
580 r->idiag_timer = 1;
581 r->idiag_retrans = req->retrans;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300583 r->id.idiag_if = sk->sk_bound_dev_if;
584 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
585 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587 tmo = req->expires - jiffies;
588 if (tmo < 0)
589 tmo = 0;
590
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300591 r->id.idiag_sport = inet->sport;
592 r->id.idiag_dport = ireq->rmt_port;
593 r->id.idiag_src[0] = ireq->loc_addr;
594 r->id.idiag_dst[0] = ireq->rmt_addr;
595 r->idiag_expires = jiffies_to_msecs(tmo);
596 r->idiag_rqueue = 0;
597 r->idiag_wqueue = 0;
598 r->idiag_uid = sock_i_uid(sk);
599 r->idiag_inode = 0;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300600#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300601 if (r->idiag_family == AF_INET6) {
602 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800603 &inet6_rsk(req)->loc_addr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300604 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800605 &inet6_rsk(req)->rmt_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 }
607#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700608 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
610 return skb->len;
611
612nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700613 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 return -1;
615}
616
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300617static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800618 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300620 struct inet_diag_entry entry;
621 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700622 struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo2ad69c52005-06-18 22:48:55 -0700623 struct listen_sock *lopt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 struct rtattr *bc = NULL;
625 struct inet_sock *inet = inet_sk(sk);
626 int j, s_j;
627 int reqnum, s_reqnum;
628 int err = 0;
629
630 s_j = cb->args[3];
631 s_reqnum = cb->args[4];
632
633 if (s_j > 0)
634 s_j--;
635
636 entry.family = sk->sk_family;
637
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700638 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700640 lopt = icsk->icsk_accept_queue.listen_opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 if (!lopt || !lopt->qlen)
642 goto out;
643
644 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
645 bc = (struct rtattr *)(r + 1);
646 entry.sport = inet->num;
647 entry.userlocks = sk->sk_userlocks;
648 }
649
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300650 for (j = s_j; j < lopt->nr_table_entries; j++) {
Arnaldo Carvalho de Melo60236fd2005-06-18 22:47:21 -0700651 struct request_sock *req, *head = lopt->syn_table[j];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
653 reqnum = 0;
654 for (req = head; req; reqnum++, req = req->dl_next) {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700655 struct inet_request_sock *ireq = inet_rsk(req);
656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 if (reqnum < s_reqnum)
658 continue;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300659 if (r->id.idiag_dport != ireq->rmt_port &&
660 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 continue;
662
663 if (bc) {
664 entry.saddr =
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)->loc_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700669 &ireq->loc_addr;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800670 entry.daddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300671#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800673 inet6_rsk(req)->rmt_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700675 &ireq->rmt_addr;
676 entry.dport = ntohs(ireq->rmt_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300678 if (!inet_diag_bc_run(RTA_DATA(bc),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 RTA_PAYLOAD(bc), &entry))
680 continue;
681 }
682
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300683 err = inet_diag_fill_req(skb, sk, req,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 NETLINK_CB(cb->skb).pid,
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300685 cb->nlh->nlmsg_seq, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 if (err < 0) {
687 cb->args[3] = j + 1;
688 cb->args[4] = reqnum;
689 goto out;
690 }
691 }
692
693 s_reqnum = 0;
694 }
695
696out:
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700697 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698
699 return err;
700}
701
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300702static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703{
704 int i, num;
705 int s_i, s_num;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300706 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300707 const struct inet_diag_handler *handler;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300708 struct inet_hashinfo *hashinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
Herbert Xud523a322007-12-03 15:51:25 +1100710 handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
711 if (!handler)
712 goto no_handler;
713
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300714 hashinfo = handler->idiag_hashinfo;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 s_i = cb->args[1];
717 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 if (cb->args[0] == 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300720 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300722
723 inet_listen_lock(hashinfo);
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700724 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 struct sock *sk;
726 struct hlist_node *node;
727
728 num = 0;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300729 sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
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) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300747 inet_listen_unlock(hashinfo);
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) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300756 inet_listen_unlock(hashinfo);
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 }
765
766 s_num = 0;
767 cb->args[3] = 0;
768 cb->args[4] = 0;
769 }
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300770 inet_listen_unlock(hashinfo);
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];
Eric Dumazet230140c2007-11-07 02:40:20 -0800781 rwlock_t *lock = inet_ehash_lockp(hashinfo, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 struct sock *sk;
783 struct hlist_node *node;
784
785 if (i > s_i)
786 s_num = 0;
787
Eric Dumazet230140c2007-11-07 02:40:20 -0800788 read_lock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 num = 0;
790 sk_for_each(sk, node, &head->chain) {
791 struct inet_sock *inet = inet_sk(sk);
792
793 if (num < s_num)
794 goto next_normal;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300795 if (!(r->idiag_states & (1 << sk->sk_state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 goto next_normal;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300797 if (r->id.idiag_sport != inet->sport &&
798 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 goto next_normal;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800800 if (r->id.idiag_dport != inet->dport &&
801 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 goto next_normal;
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800803 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
Eric Dumazet230140c2007-11-07 02:40:20 -0800804 read_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 goto done;
806 }
807next_normal:
808 ++num;
809 }
810
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300811 if (r->idiag_states & TCPF_TIME_WAIT) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800812 struct inet_timewait_sock *tw;
813
814 inet_twsk_for_each(tw, node,
Eric Dumazetdbca9b2752007-02-08 14:16:46 -0800815 &head->twchain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
817 if (num < s_num)
818 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800819 if (r->id.idiag_sport != tw->tw_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300820 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800822 if (r->id.idiag_dport != tw->tw_dport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300823 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 goto next_dying;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800825 if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
Eric Dumazet230140c2007-11-07 02:40:20 -0800826 read_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 goto done;
828 }
829next_dying:
830 ++num;
831 }
832 }
Eric Dumazet230140c2007-11-07 02:40:20 -0800833 read_unlock_bh(lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 }
835
836done:
837 cb->args[1] = i;
838 cb->args[2] = num;
Herbert Xud523a322007-12-03 15:51:25 +1100839unlock:
840 inet_diag_unlock_handler(handler);
841no_handler:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 return skb->len;
843}
844
Thomas Grafead592b2007-03-22 23:30:35 -0700845static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846{
Thomas Grafead592b2007-03-22 23:30:35 -0700847 int hdrlen = sizeof(struct inet_diag_req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Thomas Grafead592b2007-03-22 23:30:35 -0700849 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
850 nlmsg_len(nlh) < hdrlen)
851 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Thomas Grafead592b2007-03-22 23:30:35 -0700853 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -0700854 if (nlmsg_attrlen(nlh, hdrlen)) {
855 struct nlattr *attr;
856
857 attr = nlmsg_find_attr(nlh, hdrlen,
858 INET_DIAG_REQ_BYTECODE);
859 if (attr == NULL ||
860 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
861 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
862 return -EINVAL;
863 }
864
Thomas Grafc702e802007-03-22 23:30:55 -0700865 return netlink_dump_start(idiagnl, skb, nlh,
866 inet_diag_dump, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 }
Thomas Grafead592b2007-03-22 23:30:35 -0700868
869 return inet_diag_get_exact(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870}
871
Patrick McHardy0a9c7302007-09-11 11:33:28 +0200872static DEFINE_MUTEX(inet_diag_mutex);
873
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700874static void inet_diag_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700876 mutex_lock(&inet_diag_mutex);
877 netlink_rcv_skb(skb, &inet_diag_rcv_msg);
878 mutex_unlock(&inet_diag_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879}
880
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300881int inet_diag_register(const struct inet_diag_handler *h)
882{
883 const __u16 type = h->idiag_type;
884 int err = -EINVAL;
885
886 if (type >= INET_DIAG_GETSOCK_MAX)
887 goto out;
888
Herbert Xud523a322007-12-03 15:51:25 +1100889 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300890 err = -EEXIST;
891 if (inet_diag_table[type] == NULL) {
892 inet_diag_table[type] = h;
893 err = 0;
894 }
Herbert Xud523a322007-12-03 15:51:25 +1100895 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300896out:
897 return err;
898}
899EXPORT_SYMBOL_GPL(inet_diag_register);
900
901void inet_diag_unregister(const struct inet_diag_handler *h)
902{
903 const __u16 type = h->idiag_type;
904
905 if (type >= INET_DIAG_GETSOCK_MAX)
906 return;
907
Herbert Xud523a322007-12-03 15:51:25 +1100908 mutex_lock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300909 inet_diag_table[type] = NULL;
Herbert Xud523a322007-12-03 15:51:25 +1100910 mutex_unlock(&inet_diag_table_mutex);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300911}
912EXPORT_SYMBOL_GPL(inet_diag_unregister);
913
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300914static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915{
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300916 const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
917 sizeof(struct inet_diag_handler *));
918 int err = -ENOMEM;
919
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700920 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300921 if (!inet_diag_table)
922 goto out;
923
Eric W. Biedermanb4b51022007-09-12 13:05:38 +0200924 idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0,
Herbert Xud523a322007-12-03 15:51:25 +1100925 inet_diag_rcv, NULL, THIS_MODULE);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300926 if (idiagnl == NULL)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300927 goto out_free_table;
Arnaldo Carvalho de Melo17b085e2005-08-12 12:59:17 -0300928 err = 0;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300929out:
930 return err;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300931out_free_table:
932 kfree(inet_diag_table);
933 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934}
935
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300936static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937{
Denis V. Lunevb7c6ba62008-01-28 14:41:19 -0800938 netlink_kernel_release(idiagnl);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300939 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940}
941
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300942module_init(inet_diag_init);
943module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944MODULE_LICENSE("GPL");
Jean Delvare305e1e92007-10-21 16:44:04 -0700945MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG);