blob: dc429b6b0ba62bbca65f545f6a9a8630e02eaafa [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
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -080054static int inet_csk_diag_fill(struct sock *sk,
55 struct sk_buff *skb,
56 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
57 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070059 const struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -070060 const struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030061 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 struct nlmsghdr *nlh;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030063 void *info = NULL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030064 struct inet_diag_meminfo *minfo = NULL;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -070065 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030066 const struct inet_diag_handler *handler;
67
68 handler = inet_diag_table[unlh->nlmsg_type];
69 BUG_ON(handler == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -030071 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 nlh->nlmsg_flags = nlmsg_flags;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030073
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 r = NLMSG_DATA(nlh);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080075 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -080076
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080077 if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
78 minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
79
80 if (ext & (1 << (INET_DIAG_INFO - 1)))
81 info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
82 handler->idiag_info_size);
83
84 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
85 const size_t len = strlen(icsk->icsk_ca_ops->name);
86
87 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
88 icsk->icsk_ca_ops->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 }
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -080090
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030091 r->idiag_family = sk->sk_family;
92 r->idiag_state = sk->sk_state;
93 r->idiag_timer = 0;
94 r->idiag_retrans = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030096 r->id.idiag_if = sk->sk_bound_dev_if;
97 r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
98 r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300100 r->id.idiag_sport = inet->sport;
101 r->id.idiag_dport = inet->dport;
102 r->id.idiag_src[0] = inet->rcv_saddr;
103 r->id.idiag_dst[0] = inet->daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300105#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300106 if (r->idiag_family == AF_INET6) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 struct ipv6_pinfo *np = inet6_sk(sk);
108
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300109 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 &np->rcv_saddr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300111 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 &np->daddr);
113 }
114#endif
115
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700116#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700118 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300119 r->idiag_timer = 1;
120 r->idiag_retrans = icsk->icsk_retransmits;
121 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700122 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300123 r->idiag_timer = 4;
124 r->idiag_retrans = icsk->icsk_probes_out;
125 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 } else if (timer_pending(&sk->sk_timer)) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300127 r->idiag_timer = 2;
128 r->idiag_retrans = icsk->icsk_probes_out;
129 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 } else {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300131 r->idiag_timer = 0;
132 r->idiag_expires = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 }
134#undef EXPIRES_IN_MS
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300135
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300136 r->idiag_uid = sock_i_uid(sk);
137 r->idiag_inode = sock_i_ino(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139 if (minfo) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300140 minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
141 minfo->idiag_wmem = sk->sk_wmem_queued;
142 minfo->idiag_fmem = sk->sk_forward_alloc;
143 minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 }
145
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300146 handler->idiag_get_info(sk, r, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
Arnaldo Carvalho de Melo6687e982005-08-10 04:03:31 -0300148 if (sk->sk_state < TCP_TIME_WAIT &&
149 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
150 icsk->icsk_ca_ops->get_info(sk, ext, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700152 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 return skb->len;
154
Stephen Hemminger7c99c902005-06-23 12:20:36 -0700155rtattr_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700157 nlmsg_trim(skb, b);
Patrick McHardy26932562007-01-31 23:16:40 -0800158 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159}
160
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800161static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
162 struct sk_buff *skb, int ext, u32 pid,
163 u32 seq, u16 nlmsg_flags,
164 const struct nlmsghdr *unlh)
165{
166 long tmo;
167 struct inet_diag_msg *r;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700168 const unsigned char *previous_tail = skb_tail_pointer(skb);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800169 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
170 unlh->nlmsg_type, sizeof(*r));
171
172 r = NLMSG_DATA(nlh);
173 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
174
175 nlh->nlmsg_flags = nlmsg_flags;
176
177 tmo = tw->tw_ttd - jiffies;
178 if (tmo < 0)
179 tmo = 0;
180
181 r->idiag_family = tw->tw_family;
182 r->idiag_state = tw->tw_state;
183 r->idiag_timer = 0;
184 r->idiag_retrans = 0;
185 r->id.idiag_if = tw->tw_bound_dev_if;
186 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
187 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
188 r->id.idiag_sport = tw->tw_sport;
189 r->id.idiag_dport = tw->tw_dport;
190 r->id.idiag_src[0] = tw->tw_rcv_saddr;
191 r->id.idiag_dst[0] = tw->tw_daddr;
192 r->idiag_state = tw->tw_substate;
193 r->idiag_timer = 3;
Ilpo Järvinen172589c2007-08-28 15:50:33 -0700194 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800195 r->idiag_rqueue = 0;
196 r->idiag_wqueue = 0;
197 r->idiag_uid = 0;
198 r->idiag_inode = 0;
199#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
200 if (tw->tw_family == AF_INET6) {
201 const struct inet6_timewait_sock *tw6 =
202 inet6_twsk((struct sock *)tw);
203
204 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
205 &tw6->tw_v6_rcv_saddr);
206 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
207 &tw6->tw_v6_daddr);
208 }
209#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700210 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800211 return skb->len;
212nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700213 nlmsg_trim(skb, previous_tail);
Patrick McHardy26932562007-01-31 23:16:40 -0800214 return -EMSGSIZE;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800215}
216
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800217static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
218 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
219 const struct nlmsghdr *unlh)
220{
221 if (sk->sk_state == TCP_TIME_WAIT)
222 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
223 skb, ext, pid, seq, nlmsg_flags,
224 unlh);
225 return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
226}
227
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800228static int inet_diag_get_exact(struct sk_buff *in_skb,
229 const struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
231 int err;
232 struct sock *sk;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300233 struct inet_diag_req *req = NLMSG_DATA(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 struct sk_buff *rep;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300235 struct inet_hashinfo *hashinfo;
236 const struct inet_diag_handler *handler;
237
238 handler = inet_diag_table[nlh->nlmsg_type];
239 BUG_ON(handler == NULL);
240 hashinfo = handler->idiag_hashinfo;
241
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300242 if (req->idiag_family == AF_INET) {
243 sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
244 req->id.idiag_dport, req->id.idiag_src[0],
245 req->id.idiag_sport, req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 }
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300247#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300248 else if (req->idiag_family == AF_INET6) {
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300249 sk = inet6_lookup(hashinfo,
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300250 (struct in6_addr *)req->id.idiag_dst,
251 req->id.idiag_dport,
252 (struct in6_addr *)req->id.idiag_src,
253 req->id.idiag_sport,
254 req->id.idiag_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 }
256#endif
257 else {
258 return -EINVAL;
259 }
260
261 if (sk == NULL)
262 return -ENOENT;
263
264 err = -ESTALE;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300265 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
266 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
267 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
268 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 goto out;
270
271 err = -ENOMEM;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300272 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
273 sizeof(struct inet_diag_meminfo) +
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300274 handler->idiag_info_size + 64)),
275 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 if (!rep)
277 goto out;
278
Patrick McHardy26932562007-01-31 23:16:40 -0800279 err = sk_diag_fill(sk, rep, req->idiag_ext,
280 NETLINK_CB(in_skb).pid,
281 nlh->nlmsg_seq, 0, nlh);
282 if (err < 0) {
283 WARN_ON(err == -EMSGSIZE);
284 kfree_skb(rep);
285 goto out;
286 }
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300287 err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
288 MSG_DONTWAIT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 if (err > 0)
290 err = 0;
291
292out:
293 if (sk) {
294 if (sk->sk_state == TCP_TIME_WAIT)
Arnaldo Carvalho de Melo8feaf0c02005-08-09 20:09:30 -0700295 inet_twsk_put((struct inet_timewait_sock *)sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 else
297 sock_put(sk);
298 }
299 return err;
300}
301
Al Viro9f855292006-09-27 18:44:30 -0700302static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303{
304 int words = bits >> 5;
305
306 bits &= 0x1f;
307
308 if (words) {
309 if (memcmp(a1, a2, words << 2))
310 return 0;
311 }
312 if (bits) {
Al Viro9f855292006-09-27 18:44:30 -0700313 __be32 w1, w2;
314 __be32 mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316 w1 = a1[words];
317 w2 = a2[words];
318
319 mask = htonl((0xffffffff) << (32 - bits));
320
321 if ((w1 ^ w2) & mask)
322 return 0;
323 }
324
325 return 1;
326}
327
328
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300329static int inet_diag_bc_run(const void *bc, int len,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800330 const struct inet_diag_entry *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
332 while (len > 0) {
333 int yes = 1;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300334 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300337 case INET_DIAG_BC_NOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300339 case INET_DIAG_BC_JMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 yes = 0;
341 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300342 case INET_DIAG_BC_S_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 yes = entry->sport >= op[1].no;
344 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300345 case INET_DIAG_BC_S_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 yes = entry->dport <= op[1].no;
347 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300348 case INET_DIAG_BC_D_GE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 yes = entry->dport >= op[1].no;
350 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300351 case INET_DIAG_BC_D_LE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 yes = entry->dport <= op[1].no;
353 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300354 case INET_DIAG_BC_AUTO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
356 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300357 case INET_DIAG_BC_S_COND:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300358 case INET_DIAG_BC_D_COND: {
359 struct inet_diag_hostcond *cond;
Al Viro9f855292006-09-27 18:44:30 -0700360 __be32 *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300362 cond = (struct inet_diag_hostcond *)(op + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 if (cond->port != -1 &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300364 cond->port != (op->code == INET_DIAG_BC_S_COND ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 entry->sport : entry->dport)) {
366 yes = 0;
367 break;
368 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 if (cond->prefix_len == 0)
371 break;
372
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300373 if (op->code == INET_DIAG_BC_S_COND)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 addr = entry->saddr;
375 else
376 addr = entry->daddr;
377
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800378 if (bitstring_match(addr, cond->addr,
379 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 break;
381 if (entry->family == AF_INET6 &&
382 cond->family == AF_INET) {
383 if (addr[0] == 0 && addr[1] == 0 &&
384 addr[2] == htonl(0xffff) &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300385 bitstring_match(addr + 3, cond->addr,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900386 cond->prefix_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 break;
388 }
389 yes = 0;
390 break;
391 }
392 }
393
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800394 if (yes) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 len -= op->yes;
396 bc += op->yes;
397 } else {
398 len -= op->no;
399 bc += op->no;
400 }
401 }
402 return (len == 0);
403}
404
405static int valid_cc(const void *bc, int len, int cc)
406{
407 while (len >= 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300408 const struct inet_diag_bc_op *op = bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410 if (cc > len)
411 return 0;
412 if (cc == len)
413 return 1;
414 if (op->yes < 4)
415 return 0;
416 len -= op->yes;
417 bc += op->yes;
418 }
419 return 0;
420}
421
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300422static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423{
424 const unsigned char *bc = bytecode;
425 int len = bytecode_len;
426
427 while (len > 0) {
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300428 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
431 switch (op->code) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300432 case INET_DIAG_BC_AUTO:
433 case INET_DIAG_BC_S_COND:
434 case INET_DIAG_BC_D_COND:
435 case INET_DIAG_BC_S_GE:
436 case INET_DIAG_BC_S_LE:
437 case INET_DIAG_BC_D_GE:
438 case INET_DIAG_BC_D_LE:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300439 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 return -EINVAL;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300441 case INET_DIAG_BC_JMP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300442 if (op->no < 4 || op->no > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 return -EINVAL;
444 if (op->no < len &&
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300445 !valid_cc(bytecode, bytecode_len, len - op->no))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 return -EINVAL;
447 break;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300448 case INET_DIAG_BC_NOP:
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -0300449 if (op->yes < 4 || op->yes > len + 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return -EINVAL;
451 break;
452 default:
453 return -EINVAL;
454 }
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800455 bc += op->yes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 len -= op->yes;
457 }
458 return len == 0 ? 0 : -EINVAL;
459}
460
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800461static int inet_csk_diag_dump(struct sock *sk,
462 struct sk_buff *skb,
463 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300465 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
467 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300468 struct inet_diag_entry entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 struct rtattr *bc = (struct rtattr *)(r + 1);
470 struct inet_sock *inet = inet_sk(sk);
471
472 entry.family = sk->sk_family;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300473#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 if (entry.family == AF_INET6) {
475 struct ipv6_pinfo *np = inet6_sk(sk);
476
477 entry.saddr = np->rcv_saddr.s6_addr32;
478 entry.daddr = np->daddr.s6_addr32;
479 } else
480#endif
481 {
482 entry.saddr = &inet->rcv_saddr;
483 entry.daddr = &inet->daddr;
484 }
485 entry.sport = inet->num;
486 entry.dport = ntohs(inet->dport);
487 entry.userlocks = sk->sk_userlocks;
488
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300489 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 return 0;
491 }
492
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800493 return inet_csk_diag_fill(sk, skb, r->idiag_ext,
494 NETLINK_CB(cb->skb).pid,
495 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496}
497
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800498static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
499 struct sk_buff *skb,
500 struct netlink_callback *cb)
501{
502 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
503
504 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
505 struct inet_diag_entry entry;
506 struct rtattr *bc = (struct rtattr *)(r + 1);
507
508 entry.family = tw->tw_family;
509#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
510 if (tw->tw_family == AF_INET6) {
511 struct inet6_timewait_sock *tw6 =
512 inet6_twsk((struct sock *)tw);
513 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
514 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
515 } else
516#endif
517 {
518 entry.saddr = &tw->tw_rcv_saddr;
519 entry.daddr = &tw->tw_daddr;
520 }
521 entry.sport = tw->tw_num;
522 entry.dport = ntohs(tw->tw_dport);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900523 entry.userlocks = 0;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800524
525 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
526 return 0;
527 }
528
529 return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
530 NETLINK_CB(cb->skb).pid,
531 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
532}
533
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300534static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800535 struct request_sock *req, u32 pid, u32 seq,
536 const struct nlmsghdr *unlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700538 const struct inet_request_sock *ireq = inet_rsk(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 struct inet_sock *inet = inet_sk(sk);
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700540 unsigned char *b = skb_tail_pointer(skb);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300541 struct inet_diag_msg *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 struct nlmsghdr *nlh;
543 long tmo;
544
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300545 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 nlh->nlmsg_flags = NLM_F_MULTI;
547 r = NLMSG_DATA(nlh);
548
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300549 r->idiag_family = sk->sk_family;
550 r->idiag_state = TCP_SYN_RECV;
551 r->idiag_timer = 1;
552 r->idiag_retrans = req->retrans;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300554 r->id.idiag_if = sk->sk_bound_dev_if;
555 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
556 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 tmo = req->expires - jiffies;
559 if (tmo < 0)
560 tmo = 0;
561
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300562 r->id.idiag_sport = inet->sport;
563 r->id.idiag_dport = ireq->rmt_port;
564 r->id.idiag_src[0] = ireq->loc_addr;
565 r->id.idiag_dst[0] = ireq->rmt_addr;
566 r->idiag_expires = jiffies_to_msecs(tmo);
567 r->idiag_rqueue = 0;
568 r->idiag_wqueue = 0;
569 r->idiag_uid = sock_i_uid(sk);
570 r->idiag_inode = 0;
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300571#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300572 if (r->idiag_family == AF_INET6) {
573 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800574 &inet6_rsk(req)->loc_addr);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300575 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800576 &inet6_rsk(req)->rmt_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 }
578#endif
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700579 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
581 return skb->len;
582
583nlmsg_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700584 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 return -1;
586}
587
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300588static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800589 struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300591 struct inet_diag_entry entry;
592 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700593 struct inet_connection_sock *icsk = inet_csk(sk);
Arnaldo Carvalho de Melo2ad69c52005-06-18 22:48:55 -0700594 struct listen_sock *lopt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 struct rtattr *bc = NULL;
596 struct inet_sock *inet = inet_sk(sk);
597 int j, s_j;
598 int reqnum, s_reqnum;
599 int err = 0;
600
601 s_j = cb->args[3];
602 s_reqnum = cb->args[4];
603
604 if (s_j > 0)
605 s_j--;
606
607 entry.family = sk->sk_family;
608
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700609 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700611 lopt = icsk->icsk_accept_queue.listen_opt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 if (!lopt || !lopt->qlen)
613 goto out;
614
615 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
616 bc = (struct rtattr *)(r + 1);
617 entry.sport = inet->num;
618 entry.userlocks = sk->sk_userlocks;
619 }
620
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300621 for (j = s_j; j < lopt->nr_table_entries; j++) {
Arnaldo Carvalho de Melo60236fd2005-06-18 22:47:21 -0700622 struct request_sock *req, *head = lopt->syn_table[j];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624 reqnum = 0;
625 for (req = head; req; reqnum++, req = req->dl_next) {
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700626 struct inet_request_sock *ireq = inet_rsk(req);
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 if (reqnum < s_reqnum)
629 continue;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300630 if (r->id.idiag_dport != ireq->rmt_port &&
631 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 continue;
633
634 if (bc) {
635 entry.saddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300636#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800638 inet6_rsk(req)->loc_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700640 &ireq->loc_addr;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800641 entry.daddr =
Arnaldo Carvalho de Melo505cbfc2005-08-12 09:19:38 -0300642#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 (entry.family == AF_INET6) ?
Arnaldo Carvalho de Meloca304b62005-12-13 23:15:40 -0800644 inet6_rsk(req)->rmt_addr.s6_addr32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645#endif
Arnaldo Carvalho de Melo2e6599c2005-06-18 22:46:52 -0700646 &ireq->rmt_addr;
647 entry.dport = ntohs(ireq->rmt_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300649 if (!inet_diag_bc_run(RTA_DATA(bc),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 RTA_PAYLOAD(bc), &entry))
651 continue;
652 }
653
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300654 err = inet_diag_fill_req(skb, sk, req,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 NETLINK_CB(cb->skb).pid,
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300656 cb->nlh->nlmsg_seq, cb->nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 if (err < 0) {
658 cb->args[3] = j + 1;
659 cb->args[4] = reqnum;
660 goto out;
661 }
662 }
663
664 s_reqnum = 0;
665 }
666
667out:
Arnaldo Carvalho de Melo463c84b2005-08-09 20:10:42 -0700668 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669
670 return err;
671}
672
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300673static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674{
675 int i, num;
676 int s_i, s_num;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300677 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300678 const struct inet_diag_handler *handler;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300679 struct inet_hashinfo *hashinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300681 handler = inet_diag_table[cb->nlh->nlmsg_type];
682 BUG_ON(handler == NULL);
683 hashinfo = handler->idiag_hashinfo;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800684
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 s_i = cb->args[1];
686 s_num = num = cb->args[2];
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 if (cb->args[0] == 0) {
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300689 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 goto skip_listen_ht;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300691
692 inet_listen_lock(hashinfo);
Arnaldo Carvalho de Melo0f7ff922005-08-09 19:59:44 -0700693 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 struct sock *sk;
695 struct hlist_node *node;
696
697 num = 0;
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300698 sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 struct inet_sock *inet = inet_sk(sk);
700
701 if (num < s_num) {
702 num++;
703 continue;
704 }
705
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300706 if (r->id.idiag_sport != inet->sport &&
707 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 goto next_listen;
709
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300710 if (!(r->idiag_states & TCPF_LISTEN) ||
711 r->id.idiag_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 cb->args[3] > 0)
713 goto syn_recv;
714
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800715 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300716 inet_listen_unlock(hashinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 goto done;
718 }
719
720syn_recv:
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300721 if (!(r->idiag_states & TCPF_SYN_RECV))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 goto next_listen;
723
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300724 if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300725 inet_listen_unlock(hashinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 goto done;
727 }
728
729next_listen:
730 cb->args[3] = 0;
731 cb->args[4] = 0;
732 ++num;
733 }
734
735 s_num = 0;
736 cb->args[3] = 0;
737 cb->args[4] = 0;
738 }
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300739 inet_listen_unlock(hashinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740skip_listen_ht:
741 cb->args[0] = 1;
742 s_i = num = s_num = 0;
743 }
744
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300745 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 return skb->len;
747
Arnaldo Carvalho de Melo540722f2005-08-10 05:54:28 -0300748 for (i = s_i; i < hashinfo->ehash_size; i++) {
749 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 struct sock *sk;
751 struct hlist_node *node;
752
753 if (i > s_i)
754 s_num = 0;
755
756 read_lock_bh(&head->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 num = 0;
758 sk_for_each(sk, node, &head->chain) {
759 struct inet_sock *inet = inet_sk(sk);
760
761 if (num < s_num)
762 goto next_normal;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300763 if (!(r->idiag_states & (1 << sk->sk_state)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 goto next_normal;
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300765 if (r->id.idiag_sport != inet->sport &&
766 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 goto next_normal;
Arnaldo Carvalho de Melo4e852c02006-01-09 14:56:19 -0800768 if (r->id.idiag_dport != inet->dport &&
769 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 goto next_normal;
Arnaldo Carvalho de Melodff2c032006-01-09 14:56:56 -0800771 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 read_unlock_bh(&head->lock);
773 goto done;
774 }
775next_normal:
776 ++num;
777 }
778
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300779 if (r->idiag_states & TCPF_TIME_WAIT) {
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800780 struct inet_timewait_sock *tw;
781
782 inet_twsk_for_each(tw, node,
Eric Dumazetdbca9b2752007-02-08 14:16:46 -0800783 &head->twchain) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
785 if (num < s_num)
786 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800787 if (r->id.idiag_sport != tw->tw_sport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300788 r->id.idiag_sport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 goto next_dying;
Arnaldo Carvalho de Melo7dbf0752006-01-09 14:56:03 -0800790 if (r->id.idiag_dport != tw->tw_dport &&
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300791 r->id.idiag_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 goto next_dying;
Arnaldo Carvalho de Meloc7d58aa2006-01-09 14:56:38 -0800793 if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 read_unlock_bh(&head->lock);
795 goto done;
796 }
797next_dying:
798 ++num;
799 }
800 }
801 read_unlock_bh(&head->lock);
802 }
803
804done:
805 cb->args[1] = i;
806 cb->args[2] = num;
807 return skb->len;
808}
809
Thomas Grafead592b2007-03-22 23:30:35 -0700810static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811{
Thomas Grafead592b2007-03-22 23:30:35 -0700812 int hdrlen = sizeof(struct inet_diag_req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Thomas Grafead592b2007-03-22 23:30:35 -0700814 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
815 nlmsg_len(nlh) < hdrlen)
816 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
Jean Delvare305e1e92007-10-21 16:44:04 -0700818#ifdef CONFIG_KMOD
819 if (inet_diag_table[nlh->nlmsg_type] == NULL)
820 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
821 NETLINK_INET_DIAG, nlh->nlmsg_type);
822#endif
823
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300824 if (inet_diag_table[nlh->nlmsg_type] == NULL)
825 return -ENOENT;
826
Thomas Grafead592b2007-03-22 23:30:35 -0700827 if (nlh->nlmsg_flags & NLM_F_DUMP) {
Thomas Grafead592b2007-03-22 23:30:35 -0700828 if (nlmsg_attrlen(nlh, hdrlen)) {
829 struct nlattr *attr;
830
831 attr = nlmsg_find_attr(nlh, hdrlen,
832 INET_DIAG_REQ_BYTECODE);
833 if (attr == NULL ||
834 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
835 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
836 return -EINVAL;
837 }
838
Thomas Grafc702e802007-03-22 23:30:55 -0700839 return netlink_dump_start(idiagnl, skb, nlh,
840 inet_diag_dump, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 }
Thomas Grafead592b2007-03-22 23:30:35 -0700842
843 return inet_diag_get_exact(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844}
845
Patrick McHardy0a9c7302007-09-11 11:33:28 +0200846static DEFINE_MUTEX(inet_diag_mutex);
847
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700848static void inet_diag_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -0700850 mutex_lock(&inet_diag_mutex);
851 netlink_rcv_skb(skb, &inet_diag_rcv_msg);
852 mutex_unlock(&inet_diag_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853}
854
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300855static DEFINE_SPINLOCK(inet_diag_register_lock);
856
857int inet_diag_register(const struct inet_diag_handler *h)
858{
859 const __u16 type = h->idiag_type;
860 int err = -EINVAL;
861
862 if (type >= INET_DIAG_GETSOCK_MAX)
863 goto out;
864
865 spin_lock(&inet_diag_register_lock);
866 err = -EEXIST;
867 if (inet_diag_table[type] == NULL) {
868 inet_diag_table[type] = h;
869 err = 0;
870 }
871 spin_unlock(&inet_diag_register_lock);
872out:
873 return err;
874}
875EXPORT_SYMBOL_GPL(inet_diag_register);
876
877void inet_diag_unregister(const struct inet_diag_handler *h)
878{
879 const __u16 type = h->idiag_type;
880
881 if (type >= INET_DIAG_GETSOCK_MAX)
882 return;
883
884 spin_lock(&inet_diag_register_lock);
885 inet_diag_table[type] = NULL;
886 spin_unlock(&inet_diag_register_lock);
887
888 synchronize_rcu();
889}
890EXPORT_SYMBOL_GPL(inet_diag_unregister);
891
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300892static int __init inet_diag_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893{
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300894 const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
895 sizeof(struct inet_diag_handler *));
896 int err = -ENOMEM;
897
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700898 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300899 if (!inet_diag_table)
900 goto out;
901
Eric W. Biedermanb4b51022007-09-12 13:05:38 +0200902 idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0,
903 inet_diag_rcv, NULL, THIS_MODULE);
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300904 if (idiagnl == NULL)
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300905 goto out_free_table;
Arnaldo Carvalho de Melo17b085e2005-08-12 12:59:17 -0300906 err = 0;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300907out:
908 return err;
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300909out_free_table:
910 kfree(inet_diag_table);
911 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912}
913
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300914static void __exit inet_diag_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300916 sock_release(idiagnl->sk_socket);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -0300917 kfree(inet_diag_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918}
919
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -0300920module_init(inet_diag_init);
921module_exit(inet_diag_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922MODULE_LICENSE("GPL");
Jean Delvare305e1e92007-10-21 16:44:04 -0700923MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG);