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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> |
1da177e4 | 36 | |
4f5736c4 ACM |
37 | static const struct inet_diag_handler **inet_diag_table; |
38 | ||
73c1f4a0 | 39 | struct inet_diag_entry { |
9f855299 AV |
40 | __be32 *saddr; |
41 | __be32 *daddr; | |
1da177e4 LT |
42 | u16 sport; |
43 | u16 dport; | |
44 | u16 family; | |
45 | u16 userlocks; | |
46 | }; | |
47 | ||
73c1f4a0 | 48 | static struct sock *idiagnl; |
1da177e4 | 49 | |
73c1f4a0 | 50 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
7c99c909 | 51 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
1da177e4 | 52 | |
d523a328 HX |
53 | static DEFINE_MUTEX(inet_diag_table_mutex); |
54 | ||
55 | static const struct inet_diag_handler *inet_diag_lock_handler(int type) | |
56 | { | |
d523a328 HX |
57 | if (!inet_diag_table[type]) |
58 | request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK, | |
59 | NETLINK_INET_DIAG, type); | |
d523a328 HX |
60 | |
61 | mutex_lock(&inet_diag_table_mutex); | |
62 | if (!inet_diag_table[type]) | |
63 | return ERR_PTR(-ENOENT); | |
64 | ||
65 | return inet_diag_table[type]; | |
66 | } | |
67 | ||
68 | static inline void inet_diag_unlock_handler( | |
69 | const struct inet_diag_handler *handler) | |
70 | { | |
71 | mutex_unlock(&inet_diag_table_mutex); | |
72 | } | |
73 | ||
dff2c035 ACM |
74 | static int inet_csk_diag_fill(struct sock *sk, |
75 | struct sk_buff *skb, | |
76 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
77 | const struct nlmsghdr *unlh) | |
1da177e4 | 78 | { |
463c84b9 | 79 | const struct inet_sock *inet = inet_sk(sk); |
463c84b9 | 80 | const struct inet_connection_sock *icsk = inet_csk(sk); |
73c1f4a0 | 81 | struct inet_diag_msg *r; |
1da177e4 | 82 | struct nlmsghdr *nlh; |
4f5736c4 | 83 | void *info = NULL; |
73c1f4a0 | 84 | struct inet_diag_meminfo *minfo = NULL; |
27a884dc | 85 | unsigned char *b = skb_tail_pointer(skb); |
4f5736c4 ACM |
86 | const struct inet_diag_handler *handler; |
87 | ||
88 | handler = inet_diag_table[unlh->nlmsg_type]; | |
89 | BUG_ON(handler == NULL); | |
1da177e4 | 90 | |
540722ff | 91 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 | 92 | nlh->nlmsg_flags = nlmsg_flags; |
4f5736c4 | 93 | |
1da177e4 | 94 | r = NLMSG_DATA(nlh); |
c7d58aab ACM |
95 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
96 | ||
97 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) | |
98 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo)); | |
99 | ||
100 | if (ext & (1 << (INET_DIAG_INFO - 1))) | |
101 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, | |
102 | handler->idiag_info_size); | |
103 | ||
104 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { | |
105 | const size_t len = strlen(icsk->icsk_ca_ops->name); | |
106 | ||
107 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), | |
108 | icsk->icsk_ca_ops->name); | |
1da177e4 | 109 | } |
c7d58aab | 110 | |
3ceca749 MR |
111 | if ((ext & (1 << (INET_DIAG_TOS - 1))) && (sk->sk_family != AF_INET6)) |
112 | RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos); | |
113 | ||
73c1f4a0 ACM |
114 | r->idiag_family = sk->sk_family; |
115 | r->idiag_state = sk->sk_state; | |
116 | r->idiag_timer = 0; | |
117 | r->idiag_retrans = 0; | |
1da177e4 | 118 | |
73c1f4a0 ACM |
119 | 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); | |
1da177e4 | 122 | |
c720c7e8 ED |
123 | r->id.idiag_sport = inet->inet_sport; |
124 | r->id.idiag_dport = inet->inet_dport; | |
125 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
126 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 127 | |
505cbfc5 | 128 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 129 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 130 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 131 | |
73c1f4a0 | 132 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
1da177e4 | 133 | &np->rcv_saddr); |
73c1f4a0 | 134 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
1da177e4 | 135 | &np->daddr); |
3ceca749 MR |
136 | if (ext & (1 << (INET_DIAG_TOS - 1))) |
137 | RTA_PUT_U8(skb, INET_DIAG_TOS, np->tclass); | |
1da177e4 LT |
138 | } |
139 | #endif | |
140 | ||
172589cc | 141 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 142 | |
463c84b9 | 143 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
144 | r->idiag_timer = 1; |
145 | r->idiag_retrans = icsk->icsk_retransmits; | |
146 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 147 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
148 | r->idiag_timer = 4; |
149 | r->idiag_retrans = icsk->icsk_probes_out; | |
150 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 151 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
152 | r->idiag_timer = 2; |
153 | r->idiag_retrans = icsk->icsk_probes_out; | |
154 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 155 | } else { |
73c1f4a0 ACM |
156 | r->idiag_timer = 0; |
157 | r->idiag_expires = 0; | |
1da177e4 LT |
158 | } |
159 | #undef EXPIRES_IN_MS | |
540722ff | 160 | |
73c1f4a0 ACM |
161 | r->idiag_uid = sock_i_uid(sk); |
162 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
163 | |
164 | if (minfo) { | |
31e6d363 | 165 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); |
73c1f4a0 ACM |
166 | minfo->idiag_wmem = sk->sk_wmem_queued; |
167 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
31e6d363 | 168 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); |
1da177e4 LT |
169 | } |
170 | ||
4f5736c4 | 171 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 172 | |
6687e988 ACM |
173 | if (sk->sk_state < TCP_TIME_WAIT && |
174 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
175 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 176 | |
27a884dc | 177 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
178 | return skb->len; |
179 | ||
7c99c909 | 180 | rtattr_failure: |
1da177e4 | 181 | nlmsg_failure: |
dc5fc579 | 182 | nlmsg_trim(skb, b); |
26932566 | 183 | return -EMSGSIZE; |
1da177e4 LT |
184 | } |
185 | ||
c7d58aab ACM |
186 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
187 | struct sk_buff *skb, int ext, u32 pid, | |
188 | u32 seq, u16 nlmsg_flags, | |
189 | const struct nlmsghdr *unlh) | |
190 | { | |
191 | long tmo; | |
192 | struct inet_diag_msg *r; | |
27a884dc | 193 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
194 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
195 | unlh->nlmsg_type, sizeof(*r)); | |
196 | ||
197 | r = NLMSG_DATA(nlh); | |
198 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
199 | ||
200 | nlh->nlmsg_flags = nlmsg_flags; | |
201 | ||
202 | tmo = tw->tw_ttd - jiffies; | |
203 | if (tmo < 0) | |
204 | tmo = 0; | |
205 | ||
206 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
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; | |
172589cc | 217 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
218 | 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 | |
27a884dc | 233 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
234 | return skb->len; |
235 | nlmsg_failure: | |
dc5fc579 | 236 | nlmsg_trim(skb, previous_tail); |
26932566 | 237 | return -EMSGSIZE; |
c7d58aab ACM |
238 | } |
239 | ||
dff2c035 ACM |
240 | static 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 | ||
4e852c02 ACM |
251 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
252 | const struct nlmsghdr *nlh) | |
1da177e4 LT |
253 | { |
254 | int err; | |
255 | struct sock *sk; | |
73c1f4a0 | 256 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 257 | struct sk_buff *rep; |
4f5736c4 ACM |
258 | struct inet_hashinfo *hashinfo; |
259 | const struct inet_diag_handler *handler; | |
260 | ||
d523a328 | 261 | handler = inet_diag_lock_handler(nlh->nlmsg_type); |
8cf8e5a6 ACM |
262 | if (IS_ERR(handler)) { |
263 | err = PTR_ERR(handler); | |
264 | goto unlock; | |
265 | } | |
d523a328 | 266 | |
4f5736c4 | 267 | hashinfo = handler->idiag_hashinfo; |
d523a328 | 268 | err = -EINVAL; |
4f5736c4 | 269 | |
73c1f4a0 | 270 | if (req->idiag_family == AF_INET) { |
c67499c0 | 271 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
272 | req->id.idiag_dport, req->id.idiag_src[0], |
273 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 274 | } |
505cbfc5 | 275 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 276 | else if (req->idiag_family == AF_INET6) { |
d86e0dac | 277 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
278 | (struct in6_addr *)req->id.idiag_dst, |
279 | req->id.idiag_dport, | |
280 | (struct in6_addr *)req->id.idiag_src, | |
281 | req->id.idiag_sport, | |
282 | req->id.idiag_if); | |
1da177e4 LT |
283 | } |
284 | #endif | |
285 | else { | |
d523a328 | 286 | goto unlock; |
1da177e4 LT |
287 | } |
288 | ||
d523a328 | 289 | err = -ENOENT; |
1da177e4 | 290 | if (sk == NULL) |
d523a328 | 291 | goto unlock; |
1da177e4 LT |
292 | |
293 | err = -ESTALE; | |
73c1f4a0 ACM |
294 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
295 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
296 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
297 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
298 | goto out; |
299 | ||
300 | err = -ENOMEM; | |
73c1f4a0 ACM |
301 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
302 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
303 | handler->idiag_info_size + 64)), |
304 | GFP_KERNEL); | |
1da177e4 LT |
305 | if (!rep) |
306 | goto out; | |
307 | ||
26932566 PM |
308 | err = sk_diag_fill(sk, rep, req->idiag_ext, |
309 | NETLINK_CB(in_skb).pid, | |
310 | nlh->nlmsg_seq, 0, nlh); | |
311 | if (err < 0) { | |
312 | WARN_ON(err == -EMSGSIZE); | |
313 | kfree_skb(rep); | |
314 | goto out; | |
315 | } | |
73c1f4a0 ACM |
316 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
317 | MSG_DONTWAIT); | |
1da177e4 LT |
318 | if (err > 0) |
319 | err = 0; | |
320 | ||
321 | out: | |
322 | if (sk) { | |
323 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 324 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
325 | else |
326 | sock_put(sk); | |
327 | } | |
d523a328 HX |
328 | unlock: |
329 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
330 | return err; |
331 | } | |
332 | ||
9f855299 | 333 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
334 | { |
335 | int words = bits >> 5; | |
336 | ||
337 | bits &= 0x1f; | |
338 | ||
339 | if (words) { | |
340 | if (memcmp(a1, a2, words << 2)) | |
341 | return 0; | |
342 | } | |
343 | if (bits) { | |
9f855299 AV |
344 | __be32 w1, w2; |
345 | __be32 mask; | |
1da177e4 LT |
346 | |
347 | w1 = a1[words]; | |
348 | w2 = a2[words]; | |
349 | ||
350 | mask = htonl((0xffffffff) << (32 - bits)); | |
351 | ||
352 | if ((w1 ^ w2) & mask) | |
353 | return 0; | |
354 | } | |
355 | ||
356 | return 1; | |
357 | } | |
358 | ||
359 | ||
73c1f4a0 | 360 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 361 | const struct inet_diag_entry *entry) |
1da177e4 LT |
362 | { |
363 | while (len > 0) { | |
364 | int yes = 1; | |
73c1f4a0 | 365 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
366 | |
367 | switch (op->code) { | |
73c1f4a0 | 368 | case INET_DIAG_BC_NOP: |
1da177e4 | 369 | break; |
73c1f4a0 | 370 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
371 | yes = 0; |
372 | break; | |
73c1f4a0 | 373 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
374 | yes = entry->sport >= op[1].no; |
375 | break; | |
73c1f4a0 | 376 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 377 | yes = entry->sport <= op[1].no; |
1da177e4 | 378 | break; |
73c1f4a0 | 379 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
380 | yes = entry->dport >= op[1].no; |
381 | break; | |
73c1f4a0 | 382 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
383 | yes = entry->dport <= op[1].no; |
384 | break; | |
73c1f4a0 | 385 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
386 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
387 | break; | |
73c1f4a0 | 388 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
389 | case INET_DIAG_BC_D_COND: { |
390 | struct inet_diag_hostcond *cond; | |
9f855299 | 391 | __be32 *addr; |
1da177e4 | 392 | |
a8c2190e | 393 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 394 | if (cond->port != -1 && |
73c1f4a0 | 395 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
396 | entry->sport : entry->dport)) { |
397 | yes = 0; | |
398 | break; | |
399 | } | |
4e852c02 | 400 | |
1da177e4 LT |
401 | if (cond->prefix_len == 0) |
402 | break; | |
403 | ||
73c1f4a0 | 404 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
405 | addr = entry->saddr; |
406 | else | |
407 | addr = entry->daddr; | |
408 | ||
4e852c02 ACM |
409 | if (bitstring_match(addr, cond->addr, |
410 | cond->prefix_len)) | |
1da177e4 LT |
411 | break; |
412 | if (entry->family == AF_INET6 && | |
413 | cond->family == AF_INET) { | |
414 | if (addr[0] == 0 && addr[1] == 0 && | |
415 | addr[2] == htonl(0xffff) && | |
a8c2190e | 416 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 417 | cond->prefix_len)) |
1da177e4 LT |
418 | break; |
419 | } | |
420 | yes = 0; | |
421 | break; | |
422 | } | |
423 | } | |
424 | ||
4e852c02 | 425 | if (yes) { |
1da177e4 LT |
426 | len -= op->yes; |
427 | bc += op->yes; | |
428 | } else { | |
429 | len -= op->no; | |
430 | bc += op->no; | |
431 | } | |
432 | } | |
a02cec21 | 433 | return len == 0; |
1da177e4 LT |
434 | } |
435 | ||
436 | static int valid_cc(const void *bc, int len, int cc) | |
437 | { | |
438 | while (len >= 0) { | |
73c1f4a0 | 439 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
440 | |
441 | if (cc > len) | |
442 | return 0; | |
443 | if (cc == len) | |
444 | return 1; | |
eeb14972 | 445 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
446 | return 0; |
447 | len -= op->yes; | |
448 | bc += op->yes; | |
449 | } | |
450 | return 0; | |
451 | } | |
452 | ||
73c1f4a0 | 453 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 454 | { |
eeb14972 | 455 | const void *bc = bytecode; |
1da177e4 LT |
456 | int len = bytecode_len; |
457 | ||
458 | while (len > 0) { | |
eeb14972 | 459 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
460 | |
461 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
462 | switch (op->code) { | |
73c1f4a0 ACM |
463 | case INET_DIAG_BC_AUTO: |
464 | case INET_DIAG_BC_S_COND: | |
465 | case INET_DIAG_BC_D_COND: | |
466 | case INET_DIAG_BC_S_GE: | |
467 | case INET_DIAG_BC_S_LE: | |
468 | case INET_DIAG_BC_D_GE: | |
469 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 470 | case INET_DIAG_BC_JMP: |
eeb14972 | 471 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
472 | return -EINVAL; |
473 | if (op->no < len && | |
a8c2190e | 474 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
475 | return -EINVAL; |
476 | break; | |
73c1f4a0 | 477 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
478 | break; |
479 | default: | |
480 | return -EINVAL; | |
481 | } | |
eeb14972 ED |
482 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
483 | return -EINVAL; | |
4e852c02 | 484 | bc += op->yes; |
1da177e4 LT |
485 | len -= op->yes; |
486 | } | |
487 | return len == 0 ? 0 : -EINVAL; | |
488 | } | |
489 | ||
dff2c035 ACM |
490 | static int inet_csk_diag_dump(struct sock *sk, |
491 | struct sk_buff *skb, | |
492 | struct netlink_callback *cb) | |
1da177e4 | 493 | { |
73c1f4a0 | 494 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 | 495 | |
22e76c84 | 496 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
73c1f4a0 | 497 | struct inet_diag_entry entry; |
22e76c84 NE |
498 | const struct nlattr *bc = nlmsg_find_attr(cb->nlh, |
499 | sizeof(*r), | |
500 | INET_DIAG_REQ_BYTECODE); | |
1da177e4 LT |
501 | struct inet_sock *inet = inet_sk(sk); |
502 | ||
503 | entry.family = sk->sk_family; | |
505cbfc5 | 504 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
505 | if (entry.family == AF_INET6) { |
506 | struct ipv6_pinfo *np = inet6_sk(sk); | |
507 | ||
508 | entry.saddr = np->rcv_saddr.s6_addr32; | |
509 | entry.daddr = np->daddr.s6_addr32; | |
510 | } else | |
511 | #endif | |
512 | { | |
c720c7e8 ED |
513 | entry.saddr = &inet->inet_rcv_saddr; |
514 | entry.daddr = &inet->inet_daddr; | |
1da177e4 | 515 | } |
c720c7e8 ED |
516 | entry.sport = inet->inet_num; |
517 | entry.dport = ntohs(inet->inet_dport); | |
1da177e4 LT |
518 | entry.userlocks = sk->sk_userlocks; |
519 | ||
22e76c84 | 520 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
1da177e4 LT |
521 | return 0; |
522 | } | |
523 | ||
dff2c035 ACM |
524 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
525 | NETLINK_CB(cb->skb).pid, | |
526 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
527 | } |
528 | ||
c7d58aab ACM |
529 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
530 | struct sk_buff *skb, | |
531 | struct netlink_callback *cb) | |
532 | { | |
533 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
534 | ||
22e76c84 | 535 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
c7d58aab | 536 | struct inet_diag_entry entry; |
22e76c84 NE |
537 | const struct nlattr *bc = nlmsg_find_attr(cb->nlh, |
538 | sizeof(*r), | |
539 | INET_DIAG_REQ_BYTECODE); | |
c7d58aab ACM |
540 | |
541 | entry.family = tw->tw_family; | |
542 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
543 | if (tw->tw_family == AF_INET6) { | |
544 | struct inet6_timewait_sock *tw6 = | |
545 | inet6_twsk((struct sock *)tw); | |
546 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
547 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
548 | } else | |
549 | #endif | |
550 | { | |
551 | entry.saddr = &tw->tw_rcv_saddr; | |
552 | entry.daddr = &tw->tw_daddr; | |
553 | } | |
554 | entry.sport = tw->tw_num; | |
555 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 556 | entry.userlocks = 0; |
c7d58aab | 557 | |
22e76c84 | 558 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
c7d58aab ACM |
559 | return 0; |
560 | } | |
561 | ||
562 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
563 | NETLINK_CB(cb->skb).pid, | |
564 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
565 | } | |
566 | ||
73c1f4a0 | 567 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
568 | struct request_sock *req, u32 pid, u32 seq, |
569 | const struct nlmsghdr *unlh) | |
1da177e4 | 570 | { |
2e6599cb | 571 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 572 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 573 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 574 | struct inet_diag_msg *r; |
1da177e4 LT |
575 | struct nlmsghdr *nlh; |
576 | long tmo; | |
577 | ||
540722ff | 578 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
579 | nlh->nlmsg_flags = NLM_F_MULTI; |
580 | r = NLMSG_DATA(nlh); | |
581 | ||
73c1f4a0 ACM |
582 | r->idiag_family = sk->sk_family; |
583 | r->idiag_state = TCP_SYN_RECV; | |
584 | r->idiag_timer = 1; | |
585 | r->idiag_retrans = req->retrans; | |
1da177e4 | 586 | |
73c1f4a0 ACM |
587 | r->id.idiag_if = sk->sk_bound_dev_if; |
588 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
589 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
590 | |
591 | tmo = req->expires - jiffies; | |
592 | if (tmo < 0) | |
593 | tmo = 0; | |
594 | ||
c720c7e8 | 595 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
596 | r->id.idiag_dport = ireq->rmt_port; |
597 | r->id.idiag_src[0] = ireq->loc_addr; | |
598 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
599 | r->idiag_expires = jiffies_to_msecs(tmo); | |
600 | r->idiag_rqueue = 0; | |
601 | r->idiag_wqueue = 0; | |
602 | r->idiag_uid = sock_i_uid(sk); | |
603 | r->idiag_inode = 0; | |
505cbfc5 | 604 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
605 | if (r->idiag_family == AF_INET6) { |
606 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
ca304b61 | 607 | &inet6_rsk(req)->loc_addr); |
73c1f4a0 | 608 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
ca304b61 | 609 | &inet6_rsk(req)->rmt_addr); |
1da177e4 LT |
610 | } |
611 | #endif | |
27a884dc | 612 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
613 | |
614 | return skb->len; | |
615 | ||
616 | nlmsg_failure: | |
dc5fc579 | 617 | nlmsg_trim(skb, b); |
1da177e4 LT |
618 | return -1; |
619 | } | |
620 | ||
73c1f4a0 | 621 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 622 | struct netlink_callback *cb) |
1da177e4 | 623 | { |
73c1f4a0 ACM |
624 | struct inet_diag_entry entry; |
625 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 626 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 627 | struct listen_sock *lopt; |
22e76c84 | 628 | const struct nlattr *bc = NULL; |
1da177e4 LT |
629 | struct inet_sock *inet = inet_sk(sk); |
630 | int j, s_j; | |
631 | int reqnum, s_reqnum; | |
632 | int err = 0; | |
633 | ||
634 | s_j = cb->args[3]; | |
635 | s_reqnum = cb->args[4]; | |
636 | ||
637 | if (s_j > 0) | |
638 | s_j--; | |
639 | ||
640 | entry.family = sk->sk_family; | |
641 | ||
463c84b9 | 642 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 643 | |
463c84b9 | 644 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
645 | if (!lopt || !lopt->qlen) |
646 | goto out; | |
647 | ||
22e76c84 NE |
648 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
649 | bc = nlmsg_find_attr(cb->nlh, sizeof(*r), | |
650 | INET_DIAG_REQ_BYTECODE); | |
c720c7e8 | 651 | entry.sport = inet->inet_num; |
1da177e4 LT |
652 | entry.userlocks = sk->sk_userlocks; |
653 | } | |
654 | ||
540722ff | 655 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 656 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
657 | |
658 | reqnum = 0; | |
659 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
660 | struct inet_request_sock *ireq = inet_rsk(req); |
661 | ||
1da177e4 LT |
662 | if (reqnum < s_reqnum) |
663 | continue; | |
73c1f4a0 ACM |
664 | if (r->id.idiag_dport != ireq->rmt_port && |
665 | r->id.idiag_dport) | |
1da177e4 LT |
666 | continue; |
667 | ||
668 | if (bc) { | |
669 | entry.saddr = | |
505cbfc5 | 670 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 671 | (entry.family == AF_INET6) ? |
ca304b61 | 672 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 673 | #endif |
2e6599cb | 674 | &ireq->loc_addr; |
4e852c02 | 675 | entry.daddr = |
505cbfc5 | 676 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 677 | (entry.family == AF_INET6) ? |
ca304b61 | 678 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 679 | #endif |
2e6599cb ACM |
680 | &ireq->rmt_addr; |
681 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 682 | |
22e76c84 NE |
683 | if (!inet_diag_bc_run(nla_data(bc), |
684 | nla_len(bc), &entry)) | |
1da177e4 LT |
685 | continue; |
686 | } | |
687 | ||
73c1f4a0 | 688 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 689 | NETLINK_CB(cb->skb).pid, |
540722ff | 690 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
691 | if (err < 0) { |
692 | cb->args[3] = j + 1; | |
693 | cb->args[4] = reqnum; | |
694 | goto out; | |
695 | } | |
696 | } | |
697 | ||
698 | s_reqnum = 0; | |
699 | } | |
700 | ||
701 | out: | |
463c84b9 | 702 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
703 | |
704 | return err; | |
705 | } | |
706 | ||
73c1f4a0 | 707 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
708 | { |
709 | int i, num; | |
710 | int s_i, s_num; | |
73c1f4a0 | 711 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 712 | const struct inet_diag_handler *handler; |
540722ff | 713 | struct inet_hashinfo *hashinfo; |
1da177e4 | 714 | |
d523a328 | 715 | handler = inet_diag_lock_handler(cb->nlh->nlmsg_type); |
8cf8e5a6 ACM |
716 | if (IS_ERR(handler)) |
717 | goto unlock; | |
d523a328 | 718 | |
4f5736c4 | 719 | hashinfo = handler->idiag_hashinfo; |
4e852c02 | 720 | |
1da177e4 LT |
721 | s_i = cb->args[1]; |
722 | s_num = num = cb->args[2]; | |
4f5736c4 | 723 | |
1da177e4 | 724 | if (cb->args[0] == 0) { |
73c1f4a0 | 725 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 726 | goto skip_listen_ht; |
540722ff | 727 | |
0f7ff927 | 728 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 729 | struct sock *sk; |
c25eb3bf | 730 | struct hlist_nulls_node *node; |
5caea4ea | 731 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
732 | |
733 | num = 0; | |
5caea4ea ED |
734 | ilb = &hashinfo->listening_hash[i]; |
735 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 736 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
737 | struct inet_sock *inet = inet_sk(sk); |
738 | ||
739 | if (num < s_num) { | |
740 | num++; | |
741 | continue; | |
742 | } | |
743 | ||
c720c7e8 | 744 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 745 | r->id.idiag_sport) |
1da177e4 LT |
746 | goto next_listen; |
747 | ||
73c1f4a0 ACM |
748 | if (!(r->idiag_states & TCPF_LISTEN) || |
749 | r->id.idiag_dport || | |
1da177e4 LT |
750 | cb->args[3] > 0) |
751 | goto syn_recv; | |
752 | ||
dff2c035 | 753 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
5caea4ea | 754 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
755 | goto done; |
756 | } | |
757 | ||
758 | syn_recv: | |
73c1f4a0 | 759 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
760 | goto next_listen; |
761 | ||
73c1f4a0 | 762 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
5caea4ea | 763 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
764 | goto done; |
765 | } | |
766 | ||
767 | next_listen: | |
768 | cb->args[3] = 0; | |
769 | cb->args[4] = 0; | |
770 | ++num; | |
771 | } | |
5caea4ea | 772 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
773 | |
774 | s_num = 0; | |
775 | cb->args[3] = 0; | |
776 | cb->args[4] = 0; | |
777 | } | |
1da177e4 LT |
778 | skip_listen_ht: |
779 | cb->args[0] = 1; | |
780 | s_i = num = s_num = 0; | |
781 | } | |
782 | ||
73c1f4a0 | 783 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
d523a328 | 784 | goto unlock; |
1da177e4 | 785 | |
f373b53b | 786 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 787 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 788 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 789 | struct sock *sk; |
3ab5aee7 | 790 | struct hlist_nulls_node *node; |
1da177e4 | 791 | |
6be547a6 AK |
792 | num = 0; |
793 | ||
3ab5aee7 ED |
794 | if (hlist_nulls_empty(&head->chain) && |
795 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
796 | continue; |
797 | ||
1da177e4 LT |
798 | if (i > s_i) |
799 | s_num = 0; | |
800 | ||
7e3aab4a | 801 | spin_lock_bh(lock); |
3ab5aee7 | 802 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
803 | struct inet_sock *inet = inet_sk(sk); |
804 | ||
805 | if (num < s_num) | |
806 | goto next_normal; | |
73c1f4a0 | 807 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 808 | goto next_normal; |
c720c7e8 | 809 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 810 | r->id.idiag_sport) |
1da177e4 | 811 | goto next_normal; |
c720c7e8 | 812 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 813 | r->id.idiag_dport) |
1da177e4 | 814 | goto next_normal; |
dff2c035 | 815 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
7e3aab4a | 816 | spin_unlock_bh(lock); |
1da177e4 LT |
817 | goto done; |
818 | } | |
819 | next_normal: | |
820 | ++num; | |
821 | } | |
822 | ||
73c1f4a0 | 823 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
824 | struct inet_timewait_sock *tw; |
825 | ||
826 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 827 | &head->twchain) { |
1da177e4 LT |
828 | |
829 | if (num < s_num) | |
830 | goto next_dying; | |
7dbf0755 | 831 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 832 | r->id.idiag_sport) |
1da177e4 | 833 | goto next_dying; |
7dbf0755 | 834 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 835 | r->id.idiag_dport) |
1da177e4 | 836 | goto next_dying; |
c7d58aab | 837 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
7e3aab4a | 838 | spin_unlock_bh(lock); |
1da177e4 LT |
839 | goto done; |
840 | } | |
841 | next_dying: | |
842 | ++num; | |
843 | } | |
844 | } | |
7e3aab4a | 845 | spin_unlock_bh(lock); |
1da177e4 LT |
846 | } |
847 | ||
848 | done: | |
849 | cb->args[1] = i; | |
850 | cb->args[2] = num; | |
d523a328 HX |
851 | unlock: |
852 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
853 | return skb->len; |
854 | } | |
855 | ||
ead592ba | 856 | static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 857 | { |
ead592ba | 858 | int hdrlen = sizeof(struct inet_diag_req); |
1da177e4 | 859 | |
ead592ba TG |
860 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
861 | nlmsg_len(nlh) < hdrlen) | |
862 | return -EINVAL; | |
1da177e4 | 863 | |
b8f3ab42 | 864 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
865 | if (nlmsg_attrlen(nlh, hdrlen)) { |
866 | struct nlattr *attr; | |
1da177e4 | 867 | |
ead592ba TG |
868 | attr = nlmsg_find_attr(nlh, hdrlen, |
869 | INET_DIAG_REQ_BYTECODE); | |
870 | if (attr == NULL || | |
871 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
872 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
873 | return -EINVAL; | |
874 | } | |
1da177e4 | 875 | |
c702e804 | 876 | return netlink_dump_start(idiagnl, skb, nlh, |
c7ac8679 | 877 | inet_diag_dump, NULL, 0); |
1da177e4 | 878 | } |
ead592ba TG |
879 | |
880 | return inet_diag_get_exact(skb, nlh); | |
1da177e4 LT |
881 | } |
882 | ||
0a9c7301 PM |
883 | static DEFINE_MUTEX(inet_diag_mutex); |
884 | ||
cd40b7d3 | 885 | static void inet_diag_rcv(struct sk_buff *skb) |
1da177e4 | 886 | { |
cd40b7d3 DL |
887 | mutex_lock(&inet_diag_mutex); |
888 | netlink_rcv_skb(skb, &inet_diag_rcv_msg); | |
889 | mutex_unlock(&inet_diag_mutex); | |
1da177e4 LT |
890 | } |
891 | ||
4f5736c4 ACM |
892 | int inet_diag_register(const struct inet_diag_handler *h) |
893 | { | |
894 | const __u16 type = h->idiag_type; | |
895 | int err = -EINVAL; | |
896 | ||
897 | if (type >= INET_DIAG_GETSOCK_MAX) | |
898 | goto out; | |
899 | ||
d523a328 | 900 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
901 | err = -EEXIST; |
902 | if (inet_diag_table[type] == NULL) { | |
903 | inet_diag_table[type] = h; | |
904 | err = 0; | |
905 | } | |
d523a328 | 906 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
907 | out: |
908 | return err; | |
909 | } | |
910 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
911 | ||
912 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
913 | { | |
914 | const __u16 type = h->idiag_type; | |
915 | ||
916 | if (type >= INET_DIAG_GETSOCK_MAX) | |
917 | return; | |
918 | ||
d523a328 | 919 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 920 | inet_diag_table[type] = NULL; |
d523a328 | 921 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
922 | } |
923 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
924 | ||
73c1f4a0 | 925 | static int __init inet_diag_init(void) |
1da177e4 | 926 | { |
4f5736c4 ACM |
927 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
928 | sizeof(struct inet_diag_handler *)); | |
929 | int err = -ENOMEM; | |
930 | ||
0da974f4 | 931 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
932 | if (!inet_diag_table) |
933 | goto out; | |
934 | ||
b4b51029 | 935 | idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0, |
d523a328 | 936 | inet_diag_rcv, NULL, THIS_MODULE); |
73c1f4a0 | 937 | if (idiagnl == NULL) |
4f5736c4 | 938 | goto out_free_table; |
17b085ea | 939 | err = 0; |
4f5736c4 ACM |
940 | out: |
941 | return err; | |
4f5736c4 ACM |
942 | out_free_table: |
943 | kfree(inet_diag_table); | |
944 | goto out; | |
1da177e4 LT |
945 | } |
946 | ||
73c1f4a0 | 947 | static void __exit inet_diag_exit(void) |
1da177e4 | 948 | { |
b7c6ba6e | 949 | netlink_kernel_release(idiagnl); |
4f5736c4 | 950 | kfree(inet_diag_table); |
1da177e4 LT |
951 | } |
952 | ||
73c1f4a0 ACM |
953 | module_init(inet_diag_init); |
954 | module_exit(inet_diag_exit); | |
1da177e4 | 955 | MODULE_LICENSE("GPL"); |
305e1e96 | 956 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG); |