Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
73c1f4a0 | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 3 | * |
1da177e4 LT |
4 | * 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 | ||
172589cc | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/random.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/cache.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/time.h> | |
21 | ||
22 | #include <net/icmp.h> | |
23 | #include <net/tcp.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <net/inet_common.h> | |
505cbfc5 ACM |
26 | #include <net/inet_connection_sock.h> |
27 | #include <net/inet_hashtables.h> | |
28 | #include <net/inet_timewait_sock.h> | |
29 | #include <net/inet6_hashtables.h> | |
dc5fc579 | 30 | #include <net/netlink.h> |
1da177e4 LT |
31 | |
32 | #include <linux/inet.h> | |
33 | #include <linux/stddef.h> | |
34 | ||
a8c2190e | 35 | #include <linux/inet_diag.h> |
d366477a | 36 | #include <linux/sock_diag.h> |
1da177e4 | 37 | |
4f5736c4 ACM |
38 | static const struct inet_diag_handler **inet_diag_table; |
39 | ||
73c1f4a0 | 40 | struct inet_diag_entry { |
9f855299 AV |
41 | __be32 *saddr; |
42 | __be32 *daddr; | |
1da177e4 LT |
43 | u16 sport; |
44 | u16 dport; | |
45 | u16 family; | |
46 | u16 userlocks; | |
47 | }; | |
48 | ||
7f1fb60c | 49 | static struct sock *sdiagnl; |
1da177e4 | 50 | |
73c1f4a0 | 51 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
7c99c909 | 52 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
1da177e4 | 53 | |
f13c95f0 PE |
54 | static inline int inet_diag_type2proto(int type) |
55 | { | |
56 | switch (type) { | |
57 | case TCPDIAG_GETSOCK: | |
58 | return IPPROTO_TCP; | |
59 | case DCCPDIAG_GETSOCK: | |
60 | return IPPROTO_DCCP; | |
61 | default: | |
62 | return 0; | |
63 | } | |
64 | } | |
65 | ||
d523a328 HX |
66 | static DEFINE_MUTEX(inet_diag_table_mutex); |
67 | ||
f13c95f0 | 68 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 69 | { |
f13c95f0 | 70 | if (!inet_diag_table[proto]) |
d523a328 | 71 | request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK, |
f13c95f0 | 72 | NETLINK_SOCK_DIAG, proto); |
d523a328 HX |
73 | |
74 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 75 | if (!inet_diag_table[proto]) |
d523a328 HX |
76 | return ERR_PTR(-ENOENT); |
77 | ||
f13c95f0 | 78 | return inet_diag_table[proto]; |
d523a328 HX |
79 | } |
80 | ||
81 | static inline void inet_diag_unlock_handler( | |
82 | const struct inet_diag_handler *handler) | |
83 | { | |
84 | mutex_unlock(&inet_diag_table_mutex); | |
85 | } | |
86 | ||
dff2c035 ACM |
87 | static int inet_csk_diag_fill(struct sock *sk, |
88 | struct sk_buff *skb, | |
89 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
90 | const struct nlmsghdr *unlh) | |
1da177e4 | 91 | { |
463c84b9 | 92 | const struct inet_sock *inet = inet_sk(sk); |
463c84b9 | 93 | const struct inet_connection_sock *icsk = inet_csk(sk); |
73c1f4a0 | 94 | struct inet_diag_msg *r; |
1da177e4 | 95 | struct nlmsghdr *nlh; |
4f5736c4 | 96 | void *info = NULL; |
73c1f4a0 | 97 | struct inet_diag_meminfo *minfo = NULL; |
27a884dc | 98 | unsigned char *b = skb_tail_pointer(skb); |
4f5736c4 ACM |
99 | const struct inet_diag_handler *handler; |
100 | ||
f13c95f0 | 101 | handler = inet_diag_table[inet_diag_type2proto(unlh->nlmsg_type)]; |
4f5736c4 | 102 | BUG_ON(handler == NULL); |
1da177e4 | 103 | |
540722ff | 104 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 | 105 | nlh->nlmsg_flags = nlmsg_flags; |
4f5736c4 | 106 | |
1da177e4 | 107 | r = NLMSG_DATA(nlh); |
c7d58aab ACM |
108 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
109 | ||
110 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) | |
111 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo)); | |
112 | ||
113 | if (ext & (1 << (INET_DIAG_INFO - 1))) | |
114 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, | |
115 | handler->idiag_info_size); | |
116 | ||
117 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { | |
118 | const size_t len = strlen(icsk->icsk_ca_ops->name); | |
119 | ||
120 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), | |
121 | icsk->icsk_ca_ops->name); | |
1da177e4 | 122 | } |
c7d58aab | 123 | |
73c1f4a0 ACM |
124 | r->idiag_family = sk->sk_family; |
125 | r->idiag_state = sk->sk_state; | |
126 | r->idiag_timer = 0; | |
127 | r->idiag_retrans = 0; | |
1da177e4 | 128 | |
73c1f4a0 ACM |
129 | r->id.idiag_if = sk->sk_bound_dev_if; |
130 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; | |
131 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); | |
1da177e4 | 132 | |
c720c7e8 ED |
133 | r->id.idiag_sport = inet->inet_sport; |
134 | r->id.idiag_dport = inet->inet_dport; | |
135 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
136 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 137 | |
717b6d83 MŻ |
138 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
139 | * hence this needs to be included regardless of socket family. | |
140 | */ | |
141 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
142 | RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos); | |
143 | ||
505cbfc5 | 144 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 145 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 146 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 147 | |
4e3fd7a0 AD |
148 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
149 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
06236ac3 MŻ |
150 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
151 | RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass); | |
1da177e4 LT |
152 | } |
153 | #endif | |
154 | ||
172589cc | 155 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 156 | |
463c84b9 | 157 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
158 | r->idiag_timer = 1; |
159 | r->idiag_retrans = icsk->icsk_retransmits; | |
160 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 161 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
162 | r->idiag_timer = 4; |
163 | r->idiag_retrans = icsk->icsk_probes_out; | |
164 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 165 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
166 | r->idiag_timer = 2; |
167 | r->idiag_retrans = icsk->icsk_probes_out; | |
168 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 169 | } else { |
73c1f4a0 ACM |
170 | r->idiag_timer = 0; |
171 | r->idiag_expires = 0; | |
1da177e4 LT |
172 | } |
173 | #undef EXPIRES_IN_MS | |
540722ff | 174 | |
73c1f4a0 ACM |
175 | r->idiag_uid = sock_i_uid(sk); |
176 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
177 | |
178 | if (minfo) { | |
31e6d363 | 179 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); |
73c1f4a0 ACM |
180 | minfo->idiag_wmem = sk->sk_wmem_queued; |
181 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
31e6d363 | 182 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); |
1da177e4 LT |
183 | } |
184 | ||
4f5736c4 | 185 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 186 | |
6687e988 ACM |
187 | if (sk->sk_state < TCP_TIME_WAIT && |
188 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
189 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 190 | |
27a884dc | 191 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
192 | return skb->len; |
193 | ||
7c99c909 | 194 | rtattr_failure: |
1da177e4 | 195 | nlmsg_failure: |
dc5fc579 | 196 | nlmsg_trim(skb, b); |
26932566 | 197 | return -EMSGSIZE; |
1da177e4 LT |
198 | } |
199 | ||
c7d58aab ACM |
200 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
201 | struct sk_buff *skb, int ext, u32 pid, | |
202 | u32 seq, u16 nlmsg_flags, | |
203 | const struct nlmsghdr *unlh) | |
204 | { | |
205 | long tmo; | |
206 | struct inet_diag_msg *r; | |
27a884dc | 207 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
208 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
209 | unlh->nlmsg_type, sizeof(*r)); | |
210 | ||
211 | r = NLMSG_DATA(nlh); | |
212 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
213 | ||
214 | nlh->nlmsg_flags = nlmsg_flags; | |
215 | ||
216 | tmo = tw->tw_ttd - jiffies; | |
217 | if (tmo < 0) | |
218 | tmo = 0; | |
219 | ||
220 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
221 | r->idiag_retrans = 0; |
222 | r->id.idiag_if = tw->tw_bound_dev_if; | |
223 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
224 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
225 | r->id.idiag_sport = tw->tw_sport; | |
226 | r->id.idiag_dport = tw->tw_dport; | |
227 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
228 | r->id.idiag_dst[0] = tw->tw_daddr; | |
229 | r->idiag_state = tw->tw_substate; | |
230 | r->idiag_timer = 3; | |
172589cc | 231 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
232 | r->idiag_rqueue = 0; |
233 | r->idiag_wqueue = 0; | |
234 | r->idiag_uid = 0; | |
235 | r->idiag_inode = 0; | |
236 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
237 | if (tw->tw_family == AF_INET6) { | |
238 | const struct inet6_timewait_sock *tw6 = | |
239 | inet6_twsk((struct sock *)tw); | |
240 | ||
4e3fd7a0 AD |
241 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
242 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
243 | } |
244 | #endif | |
27a884dc | 245 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
246 | return skb->len; |
247 | nlmsg_failure: | |
dc5fc579 | 248 | nlmsg_trim(skb, previous_tail); |
26932566 | 249 | return -EMSGSIZE; |
c7d58aab ACM |
250 | } |
251 | ||
dff2c035 ACM |
252 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
253 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
254 | const struct nlmsghdr *unlh) | |
255 | { | |
256 | if (sk->sk_state == TCP_TIME_WAIT) | |
257 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
258 | skb, ext, pid, seq, nlmsg_flags, | |
259 | unlh); | |
260 | return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh); | |
261 | } | |
262 | ||
4e852c02 | 263 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
fe50ce28 PE |
264 | const struct nlmsghdr *nlh, |
265 | struct inet_diag_req *req) | |
1da177e4 LT |
266 | { |
267 | int err; | |
268 | struct sock *sk; | |
1da177e4 | 269 | struct sk_buff *rep; |
4f5736c4 ACM |
270 | struct inet_hashinfo *hashinfo; |
271 | const struct inet_diag_handler *handler; | |
272 | ||
fe50ce28 | 273 | handler = inet_diag_lock_handler(req->sdiag_protocol); |
8cf8e5a6 ACM |
274 | if (IS_ERR(handler)) { |
275 | err = PTR_ERR(handler); | |
276 | goto unlock; | |
277 | } | |
d523a328 | 278 | |
4f5736c4 | 279 | hashinfo = handler->idiag_hashinfo; |
d523a328 | 280 | err = -EINVAL; |
4f5736c4 | 281 | |
fe50ce28 | 282 | if (req->sdiag_family == AF_INET) { |
c67499c0 | 283 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
284 | req->id.idiag_dport, req->id.idiag_src[0], |
285 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 286 | } |
505cbfc5 | 287 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
fe50ce28 | 288 | else if (req->sdiag_family == AF_INET6) { |
d86e0dac | 289 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
290 | (struct in6_addr *)req->id.idiag_dst, |
291 | req->id.idiag_dport, | |
292 | (struct in6_addr *)req->id.idiag_src, | |
293 | req->id.idiag_sport, | |
294 | req->id.idiag_if); | |
1da177e4 LT |
295 | } |
296 | #endif | |
297 | else { | |
d523a328 | 298 | goto unlock; |
1da177e4 LT |
299 | } |
300 | ||
d523a328 | 301 | err = -ENOENT; |
1da177e4 | 302 | if (sk == NULL) |
d523a328 | 303 | goto unlock; |
1da177e4 LT |
304 | |
305 | err = -ESTALE; | |
73c1f4a0 ACM |
306 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
307 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
308 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
309 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
310 | goto out; |
311 | ||
312 | err = -ENOMEM; | |
73c1f4a0 ACM |
313 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
314 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
315 | handler->idiag_info_size + 64)), |
316 | GFP_KERNEL); | |
1da177e4 LT |
317 | if (!rep) |
318 | goto out; | |
319 | ||
26932566 PM |
320 | err = sk_diag_fill(sk, rep, req->idiag_ext, |
321 | NETLINK_CB(in_skb).pid, | |
322 | nlh->nlmsg_seq, 0, nlh); | |
323 | if (err < 0) { | |
324 | WARN_ON(err == -EMSGSIZE); | |
325 | kfree_skb(rep); | |
326 | goto out; | |
327 | } | |
7f1fb60c | 328 | err = netlink_unicast(sdiagnl, rep, NETLINK_CB(in_skb).pid, |
73c1f4a0 | 329 | MSG_DONTWAIT); |
1da177e4 LT |
330 | if (err > 0) |
331 | err = 0; | |
332 | ||
333 | out: | |
334 | if (sk) { | |
335 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 336 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
337 | else |
338 | sock_put(sk); | |
339 | } | |
d523a328 HX |
340 | unlock: |
341 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
342 | return err; |
343 | } | |
344 | ||
9f855299 | 345 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
346 | { |
347 | int words = bits >> 5; | |
348 | ||
349 | bits &= 0x1f; | |
350 | ||
351 | if (words) { | |
352 | if (memcmp(a1, a2, words << 2)) | |
353 | return 0; | |
354 | } | |
355 | if (bits) { | |
9f855299 AV |
356 | __be32 w1, w2; |
357 | __be32 mask; | |
1da177e4 LT |
358 | |
359 | w1 = a1[words]; | |
360 | w2 = a2[words]; | |
361 | ||
362 | mask = htonl((0xffffffff) << (32 - bits)); | |
363 | ||
364 | if ((w1 ^ w2) & mask) | |
365 | return 0; | |
366 | } | |
367 | ||
368 | return 1; | |
369 | } | |
370 | ||
371 | ||
73c1f4a0 | 372 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 373 | const struct inet_diag_entry *entry) |
1da177e4 LT |
374 | { |
375 | while (len > 0) { | |
376 | int yes = 1; | |
73c1f4a0 | 377 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
378 | |
379 | switch (op->code) { | |
73c1f4a0 | 380 | case INET_DIAG_BC_NOP: |
1da177e4 | 381 | break; |
73c1f4a0 | 382 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
383 | yes = 0; |
384 | break; | |
73c1f4a0 | 385 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
386 | yes = entry->sport >= op[1].no; |
387 | break; | |
73c1f4a0 | 388 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 389 | yes = entry->sport <= op[1].no; |
1da177e4 | 390 | break; |
73c1f4a0 | 391 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
392 | yes = entry->dport >= op[1].no; |
393 | break; | |
73c1f4a0 | 394 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
395 | yes = entry->dport <= op[1].no; |
396 | break; | |
73c1f4a0 | 397 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
398 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
399 | break; | |
73c1f4a0 | 400 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
401 | case INET_DIAG_BC_D_COND: { |
402 | struct inet_diag_hostcond *cond; | |
9f855299 | 403 | __be32 *addr; |
1da177e4 | 404 | |
a8c2190e | 405 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 406 | if (cond->port != -1 && |
73c1f4a0 | 407 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
408 | entry->sport : entry->dport)) { |
409 | yes = 0; | |
410 | break; | |
411 | } | |
4e852c02 | 412 | |
1da177e4 LT |
413 | if (cond->prefix_len == 0) |
414 | break; | |
415 | ||
73c1f4a0 | 416 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
417 | addr = entry->saddr; |
418 | else | |
419 | addr = entry->daddr; | |
420 | ||
4e852c02 ACM |
421 | if (bitstring_match(addr, cond->addr, |
422 | cond->prefix_len)) | |
1da177e4 LT |
423 | break; |
424 | if (entry->family == AF_INET6 && | |
425 | cond->family == AF_INET) { | |
426 | if (addr[0] == 0 && addr[1] == 0 && | |
427 | addr[2] == htonl(0xffff) && | |
a8c2190e | 428 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 429 | cond->prefix_len)) |
1da177e4 LT |
430 | break; |
431 | } | |
432 | yes = 0; | |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
4e852c02 | 437 | if (yes) { |
1da177e4 LT |
438 | len -= op->yes; |
439 | bc += op->yes; | |
440 | } else { | |
441 | len -= op->no; | |
442 | bc += op->no; | |
443 | } | |
444 | } | |
a02cec21 | 445 | return len == 0; |
1da177e4 LT |
446 | } |
447 | ||
448 | static int valid_cc(const void *bc, int len, int cc) | |
449 | { | |
450 | while (len >= 0) { | |
73c1f4a0 | 451 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
452 | |
453 | if (cc > len) | |
454 | return 0; | |
455 | if (cc == len) | |
456 | return 1; | |
eeb14972 | 457 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
458 | return 0; |
459 | len -= op->yes; | |
460 | bc += op->yes; | |
461 | } | |
462 | return 0; | |
463 | } | |
464 | ||
73c1f4a0 | 465 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 466 | { |
eeb14972 | 467 | const void *bc = bytecode; |
1da177e4 LT |
468 | int len = bytecode_len; |
469 | ||
470 | while (len > 0) { | |
eeb14972 | 471 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
472 | |
473 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
474 | switch (op->code) { | |
73c1f4a0 ACM |
475 | case INET_DIAG_BC_AUTO: |
476 | case INET_DIAG_BC_S_COND: | |
477 | case INET_DIAG_BC_D_COND: | |
478 | case INET_DIAG_BC_S_GE: | |
479 | case INET_DIAG_BC_S_LE: | |
480 | case INET_DIAG_BC_D_GE: | |
481 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 482 | case INET_DIAG_BC_JMP: |
eeb14972 | 483 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
484 | return -EINVAL; |
485 | if (op->no < len && | |
a8c2190e | 486 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
487 | return -EINVAL; |
488 | break; | |
73c1f4a0 | 489 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
490 | break; |
491 | default: | |
492 | return -EINVAL; | |
493 | } | |
eeb14972 ED |
494 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
495 | return -EINVAL; | |
4e852c02 | 496 | bc += op->yes; |
1da177e4 LT |
497 | len -= op->yes; |
498 | } | |
499 | return len == 0 ? 0 : -EINVAL; | |
500 | } | |
501 | ||
dff2c035 ACM |
502 | static int inet_csk_diag_dump(struct sock *sk, |
503 | struct sk_buff *skb, | |
37f352b5 PE |
504 | struct netlink_callback *cb, |
505 | const struct nlattr *bc) | |
1da177e4 | 506 | { |
126fdc32 | 507 | struct inet_diag_req_compat *r = NLMSG_DATA(cb->nlh); |
1da177e4 | 508 | |
37f352b5 | 509 | if (bc != NULL) { |
73c1f4a0 | 510 | struct inet_diag_entry entry; |
1da177e4 LT |
511 | struct inet_sock *inet = inet_sk(sk); |
512 | ||
513 | entry.family = sk->sk_family; | |
505cbfc5 | 514 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
515 | if (entry.family == AF_INET6) { |
516 | struct ipv6_pinfo *np = inet6_sk(sk); | |
517 | ||
518 | entry.saddr = np->rcv_saddr.s6_addr32; | |
519 | entry.daddr = np->daddr.s6_addr32; | |
520 | } else | |
521 | #endif | |
522 | { | |
c720c7e8 ED |
523 | entry.saddr = &inet->inet_rcv_saddr; |
524 | entry.daddr = &inet->inet_daddr; | |
1da177e4 | 525 | } |
c720c7e8 ED |
526 | entry.sport = inet->inet_num; |
527 | entry.dport = ntohs(inet->inet_dport); | |
1da177e4 LT |
528 | entry.userlocks = sk->sk_userlocks; |
529 | ||
22e76c84 | 530 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
1da177e4 LT |
531 | return 0; |
532 | } | |
533 | ||
dff2c035 ACM |
534 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
535 | NETLINK_CB(cb->skb).pid, | |
536 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
537 | } |
538 | ||
c7d58aab ACM |
539 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
540 | struct sk_buff *skb, | |
37f352b5 PE |
541 | struct netlink_callback *cb, |
542 | const struct nlattr *bc) | |
c7d58aab | 543 | { |
126fdc32 | 544 | struct inet_diag_req_compat *r = NLMSG_DATA(cb->nlh); |
c7d58aab | 545 | |
37f352b5 | 546 | if (bc != NULL) { |
c7d58aab | 547 | struct inet_diag_entry entry; |
c7d58aab ACM |
548 | |
549 | entry.family = tw->tw_family; | |
550 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
551 | if (tw->tw_family == AF_INET6) { | |
552 | struct inet6_timewait_sock *tw6 = | |
553 | inet6_twsk((struct sock *)tw); | |
554 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
555 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
556 | } else | |
557 | #endif | |
558 | { | |
559 | entry.saddr = &tw->tw_rcv_saddr; | |
560 | entry.daddr = &tw->tw_daddr; | |
561 | } | |
562 | entry.sport = tw->tw_num; | |
563 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 564 | entry.userlocks = 0; |
c7d58aab | 565 | |
22e76c84 | 566 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
c7d58aab ACM |
567 | return 0; |
568 | } | |
569 | ||
570 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
571 | NETLINK_CB(cb->skb).pid, | |
572 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
573 | } | |
574 | ||
73c1f4a0 | 575 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
576 | struct request_sock *req, u32 pid, u32 seq, |
577 | const struct nlmsghdr *unlh) | |
1da177e4 | 578 | { |
2e6599cb | 579 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 580 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 581 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 582 | struct inet_diag_msg *r; |
1da177e4 LT |
583 | struct nlmsghdr *nlh; |
584 | long tmo; | |
585 | ||
540722ff | 586 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
587 | nlh->nlmsg_flags = NLM_F_MULTI; |
588 | r = NLMSG_DATA(nlh); | |
589 | ||
73c1f4a0 ACM |
590 | r->idiag_family = sk->sk_family; |
591 | r->idiag_state = TCP_SYN_RECV; | |
592 | r->idiag_timer = 1; | |
593 | r->idiag_retrans = req->retrans; | |
1da177e4 | 594 | |
73c1f4a0 ACM |
595 | r->id.idiag_if = sk->sk_bound_dev_if; |
596 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
597 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
598 | |
599 | tmo = req->expires - jiffies; | |
600 | if (tmo < 0) | |
601 | tmo = 0; | |
602 | ||
c720c7e8 | 603 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
604 | r->id.idiag_dport = ireq->rmt_port; |
605 | r->id.idiag_src[0] = ireq->loc_addr; | |
606 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
607 | r->idiag_expires = jiffies_to_msecs(tmo); | |
608 | r->idiag_rqueue = 0; | |
609 | r->idiag_wqueue = 0; | |
610 | r->idiag_uid = sock_i_uid(sk); | |
611 | r->idiag_inode = 0; | |
505cbfc5 | 612 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 613 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
614 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
615 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
616 | } |
617 | #endif | |
27a884dc | 618 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
619 | |
620 | return skb->len; | |
621 | ||
622 | nlmsg_failure: | |
dc5fc579 | 623 | nlmsg_trim(skb, b); |
1da177e4 LT |
624 | return -1; |
625 | } | |
626 | ||
73c1f4a0 | 627 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 PE |
628 | struct netlink_callback *cb, |
629 | const struct nlattr *bc) | |
1da177e4 | 630 | { |
73c1f4a0 | 631 | struct inet_diag_entry entry; |
126fdc32 | 632 | struct inet_diag_req_compat *r = NLMSG_DATA(cb->nlh); |
463c84b9 | 633 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 634 | struct listen_sock *lopt; |
1da177e4 LT |
635 | struct inet_sock *inet = inet_sk(sk); |
636 | int j, s_j; | |
637 | int reqnum, s_reqnum; | |
638 | int err = 0; | |
639 | ||
640 | s_j = cb->args[3]; | |
641 | s_reqnum = cb->args[4]; | |
642 | ||
643 | if (s_j > 0) | |
644 | s_j--; | |
645 | ||
646 | entry.family = sk->sk_family; | |
647 | ||
463c84b9 | 648 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 649 | |
463c84b9 | 650 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
651 | if (!lopt || !lopt->qlen) |
652 | goto out; | |
653 | ||
37f352b5 | 654 | if (bc != NULL) { |
c720c7e8 | 655 | entry.sport = inet->inet_num; |
1da177e4 LT |
656 | entry.userlocks = sk->sk_userlocks; |
657 | } | |
658 | ||
540722ff | 659 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 660 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
661 | |
662 | reqnum = 0; | |
663 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
664 | struct inet_request_sock *ireq = inet_rsk(req); |
665 | ||
1da177e4 LT |
666 | if (reqnum < s_reqnum) |
667 | continue; | |
73c1f4a0 ACM |
668 | if (r->id.idiag_dport != ireq->rmt_port && |
669 | r->id.idiag_dport) | |
1da177e4 LT |
670 | continue; |
671 | ||
672 | if (bc) { | |
673 | entry.saddr = | |
505cbfc5 | 674 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 675 | (entry.family == AF_INET6) ? |
ca304b61 | 676 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 677 | #endif |
2e6599cb | 678 | &ireq->loc_addr; |
4e852c02 | 679 | entry.daddr = |
505cbfc5 | 680 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 681 | (entry.family == AF_INET6) ? |
ca304b61 | 682 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 683 | #endif |
2e6599cb ACM |
684 | &ireq->rmt_addr; |
685 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 686 | |
22e76c84 NE |
687 | if (!inet_diag_bc_run(nla_data(bc), |
688 | nla_len(bc), &entry)) | |
1da177e4 LT |
689 | continue; |
690 | } | |
691 | ||
73c1f4a0 | 692 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 693 | NETLINK_CB(cb->skb).pid, |
540722ff | 694 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
695 | if (err < 0) { |
696 | cb->args[3] = j + 1; | |
697 | cb->args[4] = reqnum; | |
698 | goto out; | |
699 | } | |
700 | } | |
701 | ||
702 | s_reqnum = 0; | |
703 | } | |
704 | ||
705 | out: | |
463c84b9 | 706 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
707 | |
708 | return err; | |
709 | } | |
710 | ||
73c1f4a0 | 711 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
712 | { |
713 | int i, num; | |
714 | int s_i, s_num; | |
126fdc32 | 715 | struct inet_diag_req_compat *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 716 | const struct inet_diag_handler *handler; |
540722ff | 717 | struct inet_hashinfo *hashinfo; |
37f352b5 PE |
718 | const struct nlattr *bc = NULL; |
719 | ||
126fdc32 | 720 | if (nlmsg_attrlen(cb->nlh, sizeof(struct inet_diag_req_compat))) |
37f352b5 | 721 | bc = nlmsg_find_attr(cb->nlh, sizeof(*r), INET_DIAG_REQ_BYTECODE); |
1da177e4 | 722 | |
f13c95f0 | 723 | handler = inet_diag_lock_handler(inet_diag_type2proto(cb->nlh->nlmsg_type)); |
8cf8e5a6 ACM |
724 | if (IS_ERR(handler)) |
725 | goto unlock; | |
d523a328 | 726 | |
4f5736c4 | 727 | hashinfo = handler->idiag_hashinfo; |
4e852c02 | 728 | |
1da177e4 LT |
729 | s_i = cb->args[1]; |
730 | s_num = num = cb->args[2]; | |
4f5736c4 | 731 | |
1da177e4 | 732 | if (cb->args[0] == 0) { |
73c1f4a0 | 733 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 734 | goto skip_listen_ht; |
540722ff | 735 | |
0f7ff927 | 736 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 737 | struct sock *sk; |
c25eb3bf | 738 | struct hlist_nulls_node *node; |
5caea4ea | 739 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
740 | |
741 | num = 0; | |
5caea4ea ED |
742 | ilb = &hashinfo->listening_hash[i]; |
743 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 744 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
745 | struct inet_sock *inet = inet_sk(sk); |
746 | ||
747 | if (num < s_num) { | |
748 | num++; | |
749 | continue; | |
750 | } | |
751 | ||
c720c7e8 | 752 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 753 | r->id.idiag_sport) |
1da177e4 LT |
754 | goto next_listen; |
755 | ||
73c1f4a0 ACM |
756 | if (!(r->idiag_states & TCPF_LISTEN) || |
757 | r->id.idiag_dport || | |
1da177e4 LT |
758 | cb->args[3] > 0) |
759 | goto syn_recv; | |
760 | ||
37f352b5 | 761 | if (inet_csk_diag_dump(sk, skb, cb, bc) < 0) { |
5caea4ea | 762 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
763 | goto done; |
764 | } | |
765 | ||
766 | syn_recv: | |
73c1f4a0 | 767 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
768 | goto next_listen; |
769 | ||
37f352b5 | 770 | if (inet_diag_dump_reqs(skb, sk, cb, bc) < 0) { |
5caea4ea | 771 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
772 | goto done; |
773 | } | |
774 | ||
775 | next_listen: | |
776 | cb->args[3] = 0; | |
777 | cb->args[4] = 0; | |
778 | ++num; | |
779 | } | |
5caea4ea | 780 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
781 | |
782 | s_num = 0; | |
783 | cb->args[3] = 0; | |
784 | cb->args[4] = 0; | |
785 | } | |
1da177e4 LT |
786 | skip_listen_ht: |
787 | cb->args[0] = 1; | |
788 | s_i = num = s_num = 0; | |
789 | } | |
790 | ||
73c1f4a0 | 791 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
d523a328 | 792 | goto unlock; |
1da177e4 | 793 | |
f373b53b | 794 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 795 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 796 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 797 | struct sock *sk; |
3ab5aee7 | 798 | struct hlist_nulls_node *node; |
1da177e4 | 799 | |
6be547a6 AK |
800 | num = 0; |
801 | ||
3ab5aee7 ED |
802 | if (hlist_nulls_empty(&head->chain) && |
803 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
804 | continue; |
805 | ||
1da177e4 LT |
806 | if (i > s_i) |
807 | s_num = 0; | |
808 | ||
7e3aab4a | 809 | spin_lock_bh(lock); |
3ab5aee7 | 810 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
811 | struct inet_sock *inet = inet_sk(sk); |
812 | ||
813 | if (num < s_num) | |
814 | goto next_normal; | |
73c1f4a0 | 815 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 816 | goto next_normal; |
c720c7e8 | 817 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 818 | r->id.idiag_sport) |
1da177e4 | 819 | goto next_normal; |
c720c7e8 | 820 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 821 | r->id.idiag_dport) |
1da177e4 | 822 | goto next_normal; |
37f352b5 | 823 | if (inet_csk_diag_dump(sk, skb, cb, bc) < 0) { |
7e3aab4a | 824 | spin_unlock_bh(lock); |
1da177e4 LT |
825 | goto done; |
826 | } | |
827 | next_normal: | |
828 | ++num; | |
829 | } | |
830 | ||
73c1f4a0 | 831 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
832 | struct inet_timewait_sock *tw; |
833 | ||
834 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 835 | &head->twchain) { |
1da177e4 LT |
836 | |
837 | if (num < s_num) | |
838 | goto next_dying; | |
7dbf0755 | 839 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 840 | r->id.idiag_sport) |
1da177e4 | 841 | goto next_dying; |
7dbf0755 | 842 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 843 | r->id.idiag_dport) |
1da177e4 | 844 | goto next_dying; |
37f352b5 | 845 | if (inet_twsk_diag_dump(tw, skb, cb, bc) < 0) { |
7e3aab4a | 846 | spin_unlock_bh(lock); |
1da177e4 LT |
847 | goto done; |
848 | } | |
849 | next_dying: | |
850 | ++num; | |
851 | } | |
852 | } | |
7e3aab4a | 853 | spin_unlock_bh(lock); |
1da177e4 LT |
854 | } |
855 | ||
856 | done: | |
857 | cb->args[1] = i; | |
858 | cb->args[2] = num; | |
d523a328 HX |
859 | unlock: |
860 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
861 | return skb->len; |
862 | } | |
863 | ||
fe50ce28 PE |
864 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
865 | const struct nlmsghdr *nlh) | |
866 | { | |
867 | struct inet_diag_req_compat *rc = NLMSG_DATA(nlh); | |
868 | struct inet_diag_req req; | |
869 | ||
870 | req.sdiag_family = rc->idiag_family; | |
871 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
872 | req.idiag_ext = rc->idiag_ext; | |
873 | req.idiag_states = rc->idiag_states; | |
874 | req.id = rc->id; | |
875 | ||
876 | return inet_diag_get_exact(in_skb, nlh, &req); | |
877 | } | |
878 | ||
8d34172d | 879 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 880 | { |
126fdc32 | 881 | int hdrlen = sizeof(struct inet_diag_req_compat); |
1da177e4 | 882 | |
ead592ba TG |
883 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
884 | nlmsg_len(nlh) < hdrlen) | |
885 | return -EINVAL; | |
1da177e4 | 886 | |
b8f3ab42 | 887 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
888 | if (nlmsg_attrlen(nlh, hdrlen)) { |
889 | struct nlattr *attr; | |
1da177e4 | 890 | |
ead592ba TG |
891 | attr = nlmsg_find_attr(nlh, hdrlen, |
892 | INET_DIAG_REQ_BYTECODE); | |
893 | if (attr == NULL || | |
894 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
895 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
896 | return -EINVAL; | |
897 | } | |
1da177e4 | 898 | |
7f1fb60c | 899 | return netlink_dump_start(sdiagnl, skb, nlh, |
c7ac8679 | 900 | inet_diag_dump, NULL, 0); |
1da177e4 | 901 | } |
ead592ba | 902 | |
fe50ce28 | 903 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
904 | } |
905 | ||
d366477a PE |
906 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
907 | { | |
908 | int hdrlen = sizeof(struct inet_diag_req); | |
909 | ||
910 | if (nlmsg_len(h) < hdrlen) | |
911 | return -EINVAL; | |
912 | ||
913 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
914 | return -EAFNOSUPPORT; | |
915 | } | |
916 | ||
fe50ce28 | 917 | return inet_diag_get_exact(skb, h, (struct inet_diag_req *)NLMSG_DATA(h)); |
d366477a PE |
918 | } |
919 | ||
920 | static struct sock_diag_handler inet_diag_handler = { | |
921 | .family = AF_INET, | |
922 | .dump = inet_diag_handler_dump, | |
923 | }; | |
924 | ||
925 | static struct sock_diag_handler inet6_diag_handler = { | |
926 | .family = AF_INET6, | |
927 | .dump = inet_diag_handler_dump, | |
928 | }; | |
929 | ||
930 | static struct sock_diag_handler *sock_diag_handlers[AF_MAX]; | |
931 | static DEFINE_MUTEX(sock_diag_table_mutex); | |
932 | ||
933 | int sock_diag_register(struct sock_diag_handler *hndl) | |
934 | { | |
935 | int err = 0; | |
936 | ||
937 | if (hndl->family > AF_MAX) | |
938 | return -EINVAL; | |
939 | ||
940 | mutex_lock(&sock_diag_table_mutex); | |
941 | if (sock_diag_handlers[hndl->family]) | |
942 | err = -EBUSY; | |
943 | else | |
944 | sock_diag_handlers[hndl->family] = hndl; | |
945 | mutex_unlock(&sock_diag_table_mutex); | |
946 | ||
947 | return err; | |
948 | } | |
949 | ||
950 | void sock_diag_unregister(struct sock_diag_handler *hnld) | |
951 | { | |
952 | int family = hnld->family; | |
953 | ||
954 | if (family > AF_MAX) | |
955 | return; | |
956 | ||
957 | mutex_lock(&sock_diag_table_mutex); | |
958 | BUG_ON(sock_diag_handlers[family] != hnld); | |
959 | sock_diag_handlers[family] = NULL; | |
960 | mutex_unlock(&sock_diag_table_mutex); | |
961 | } | |
962 | ||
963 | static inline struct sock_diag_handler *sock_diag_lock_handler(int family) | |
964 | { | |
965 | mutex_lock(&sock_diag_table_mutex); | |
966 | return sock_diag_handlers[family]; | |
967 | } | |
968 | ||
969 | static inline void sock_diag_unlock_handler(struct sock_diag_handler *h) | |
970 | { | |
971 | mutex_unlock(&sock_diag_table_mutex); | |
972 | } | |
973 | ||
8d34172d PE |
974 | static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
975 | { | |
d366477a PE |
976 | int err; |
977 | struct sock_diag_req *req = NLMSG_DATA(nlh); | |
978 | struct sock_diag_handler *hndl; | |
979 | ||
980 | if (nlmsg_len(nlh) < sizeof(*req)) | |
981 | return -EINVAL; | |
982 | ||
983 | hndl = sock_diag_lock_handler(req->sdiag_family); | |
984 | if (hndl == NULL) | |
985 | err = -ENOENT; | |
986 | else | |
987 | err = hndl->dump(skb, nlh); | |
988 | sock_diag_unlock_handler(hndl); | |
989 | ||
990 | return err; | |
8d34172d PE |
991 | } |
992 | ||
7f1fb60c PE |
993 | static int sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
994 | { | |
8d34172d PE |
995 | switch (nlh->nlmsg_type) { |
996 | case TCPDIAG_GETSOCK: | |
997 | case DCCPDIAG_GETSOCK: | |
998 | return inet_diag_rcv_msg_compat(skb, nlh); | |
999 | case SOCK_DIAG_BY_FAMILY: | |
1000 | return __sock_diag_rcv_msg(skb, nlh); | |
1001 | default: | |
1002 | return -EINVAL; | |
1003 | } | |
7f1fb60c PE |
1004 | } |
1005 | ||
1006 | static DEFINE_MUTEX(sock_diag_mutex); | |
0a9c7301 | 1007 | |
7f1fb60c | 1008 | static void sock_diag_rcv(struct sk_buff *skb) |
1da177e4 | 1009 | { |
7f1fb60c PE |
1010 | mutex_lock(&sock_diag_mutex); |
1011 | netlink_rcv_skb(skb, &sock_diag_rcv_msg); | |
1012 | mutex_unlock(&sock_diag_mutex); | |
1da177e4 LT |
1013 | } |
1014 | ||
4f5736c4 ACM |
1015 | int inet_diag_register(const struct inet_diag_handler *h) |
1016 | { | |
1017 | const __u16 type = h->idiag_type; | |
1018 | int err = -EINVAL; | |
1019 | ||
f13c95f0 | 1020 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1021 | goto out; |
1022 | ||
d523a328 | 1023 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1024 | err = -EEXIST; |
1025 | if (inet_diag_table[type] == NULL) { | |
1026 | inet_diag_table[type] = h; | |
1027 | err = 0; | |
1028 | } | |
d523a328 | 1029 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1030 | out: |
1031 | return err; | |
1032 | } | |
1033 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1034 | ||
1035 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1036 | { | |
1037 | const __u16 type = h->idiag_type; | |
1038 | ||
f13c95f0 | 1039 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1040 | return; |
1041 | ||
d523a328 | 1042 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1043 | inet_diag_table[type] = NULL; |
d523a328 | 1044 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1045 | } |
1046 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1047 | ||
73c1f4a0 | 1048 | static int __init inet_diag_init(void) |
1da177e4 | 1049 | { |
f13c95f0 | 1050 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1051 | sizeof(struct inet_diag_handler *)); |
1052 | int err = -ENOMEM; | |
1053 | ||
0da974f4 | 1054 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1055 | if (!inet_diag_table) |
1056 | goto out; | |
1057 | ||
7f1fb60c PE |
1058 | sdiagnl = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG, 0, |
1059 | sock_diag_rcv, NULL, THIS_MODULE); | |
1060 | if (sdiagnl == NULL) | |
4f5736c4 | 1061 | goto out_free_table; |
d366477a PE |
1062 | |
1063 | err = sock_diag_register(&inet_diag_handler); | |
1064 | if (err) | |
1065 | goto out_free_nl; | |
1066 | ||
1067 | err = sock_diag_register(&inet6_diag_handler); | |
1068 | if (err) | |
1069 | goto out_free_inet; | |
1070 | ||
4f5736c4 ACM |
1071 | out: |
1072 | return err; | |
d366477a PE |
1073 | |
1074 | out_free_inet: | |
1075 | sock_diag_unregister(&inet_diag_handler); | |
1076 | out_free_nl: | |
1077 | netlink_kernel_release(sdiagnl); | |
4f5736c4 ACM |
1078 | out_free_table: |
1079 | kfree(inet_diag_table); | |
1080 | goto out; | |
1da177e4 LT |
1081 | } |
1082 | ||
73c1f4a0 | 1083 | static void __exit inet_diag_exit(void) |
1da177e4 | 1084 | { |
d366477a PE |
1085 | sock_diag_unregister(&inet6_diag_handler); |
1086 | sock_diag_unregister(&inet_diag_handler); | |
7f1fb60c | 1087 | netlink_kernel_release(sdiagnl); |
4f5736c4 | 1088 | kfree(inet_diag_table); |
1da177e4 LT |
1089 | } |
1090 | ||
73c1f4a0 ACM |
1091 | module_init(inet_diag_init); |
1092 | module_exit(inet_diag_exit); | |
1da177e4 | 1093 | MODULE_LICENSE("GPL"); |
7f1fb60c | 1094 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_SOCK_DIAG); |