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 | |
73c1f4a0 ACM |
111 | r->idiag_family = sk->sk_family; |
112 | r->idiag_state = sk->sk_state; | |
113 | r->idiag_timer = 0; | |
114 | r->idiag_retrans = 0; | |
1da177e4 | 115 | |
73c1f4a0 ACM |
116 | r->id.idiag_if = sk->sk_bound_dev_if; |
117 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; | |
118 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); | |
1da177e4 | 119 | |
c720c7e8 ED |
120 | r->id.idiag_sport = inet->inet_sport; |
121 | r->id.idiag_dport = inet->inet_dport; | |
122 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
123 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 124 | |
717b6d83 MŻ |
125 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
126 | * hence this needs to be included regardless of socket family. | |
127 | */ | |
128 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
129 | RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos); | |
130 | ||
505cbfc5 | 131 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 132 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 133 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 134 | |
4e3fd7a0 AD |
135 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
136 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
06236ac3 MŻ |
137 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
138 | RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass); | |
1da177e4 LT |
139 | } |
140 | #endif | |
141 | ||
172589cc | 142 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 143 | |
463c84b9 | 144 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
145 | r->idiag_timer = 1; |
146 | r->idiag_retrans = icsk->icsk_retransmits; | |
147 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 148 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
149 | r->idiag_timer = 4; |
150 | r->idiag_retrans = icsk->icsk_probes_out; | |
151 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 152 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
153 | r->idiag_timer = 2; |
154 | r->idiag_retrans = icsk->icsk_probes_out; | |
155 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 156 | } else { |
73c1f4a0 ACM |
157 | r->idiag_timer = 0; |
158 | r->idiag_expires = 0; | |
1da177e4 LT |
159 | } |
160 | #undef EXPIRES_IN_MS | |
540722ff | 161 | |
73c1f4a0 ACM |
162 | r->idiag_uid = sock_i_uid(sk); |
163 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
164 | |
165 | if (minfo) { | |
31e6d363 | 166 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); |
73c1f4a0 ACM |
167 | minfo->idiag_wmem = sk->sk_wmem_queued; |
168 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
31e6d363 | 169 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); |
1da177e4 LT |
170 | } |
171 | ||
4f5736c4 | 172 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 173 | |
6687e988 ACM |
174 | if (sk->sk_state < TCP_TIME_WAIT && |
175 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
176 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 177 | |
27a884dc | 178 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
179 | return skb->len; |
180 | ||
7c99c909 | 181 | rtattr_failure: |
1da177e4 | 182 | nlmsg_failure: |
dc5fc579 | 183 | nlmsg_trim(skb, b); |
26932566 | 184 | return -EMSGSIZE; |
1da177e4 LT |
185 | } |
186 | ||
c7d58aab ACM |
187 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
188 | struct sk_buff *skb, int ext, u32 pid, | |
189 | u32 seq, u16 nlmsg_flags, | |
190 | const struct nlmsghdr *unlh) | |
191 | { | |
192 | long tmo; | |
193 | struct inet_diag_msg *r; | |
27a884dc | 194 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
195 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
196 | unlh->nlmsg_type, sizeof(*r)); | |
197 | ||
198 | r = NLMSG_DATA(nlh); | |
199 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
200 | ||
201 | nlh->nlmsg_flags = nlmsg_flags; | |
202 | ||
203 | tmo = tw->tw_ttd - jiffies; | |
204 | if (tmo < 0) | |
205 | tmo = 0; | |
206 | ||
207 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
208 | r->idiag_retrans = 0; |
209 | r->id.idiag_if = tw->tw_bound_dev_if; | |
210 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
211 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
212 | r->id.idiag_sport = tw->tw_sport; | |
213 | r->id.idiag_dport = tw->tw_dport; | |
214 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
215 | r->id.idiag_dst[0] = tw->tw_daddr; | |
216 | r->idiag_state = tw->tw_substate; | |
217 | r->idiag_timer = 3; | |
172589cc | 218 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
219 | r->idiag_rqueue = 0; |
220 | r->idiag_wqueue = 0; | |
221 | r->idiag_uid = 0; | |
222 | r->idiag_inode = 0; | |
223 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
224 | if (tw->tw_family == AF_INET6) { | |
225 | const struct inet6_timewait_sock *tw6 = | |
226 | inet6_twsk((struct sock *)tw); | |
227 | ||
4e3fd7a0 AD |
228 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
229 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
230 | } |
231 | #endif | |
27a884dc | 232 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
233 | return skb->len; |
234 | nlmsg_failure: | |
dc5fc579 | 235 | nlmsg_trim(skb, previous_tail); |
26932566 | 236 | return -EMSGSIZE; |
c7d58aab ACM |
237 | } |
238 | ||
dff2c035 ACM |
239 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
240 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
241 | const struct nlmsghdr *unlh) | |
242 | { | |
243 | if (sk->sk_state == TCP_TIME_WAIT) | |
244 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
245 | skb, ext, pid, seq, nlmsg_flags, | |
246 | unlh); | |
247 | return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh); | |
248 | } | |
249 | ||
4e852c02 ACM |
250 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
251 | const struct nlmsghdr *nlh) | |
1da177e4 LT |
252 | { |
253 | int err; | |
254 | struct sock *sk; | |
73c1f4a0 | 255 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 256 | struct sk_buff *rep; |
4f5736c4 ACM |
257 | struct inet_hashinfo *hashinfo; |
258 | const struct inet_diag_handler *handler; | |
259 | ||
d523a328 | 260 | handler = inet_diag_lock_handler(nlh->nlmsg_type); |
8cf8e5a6 ACM |
261 | if (IS_ERR(handler)) { |
262 | err = PTR_ERR(handler); | |
263 | goto unlock; | |
264 | } | |
d523a328 | 265 | |
4f5736c4 | 266 | hashinfo = handler->idiag_hashinfo; |
d523a328 | 267 | err = -EINVAL; |
4f5736c4 | 268 | |
73c1f4a0 | 269 | if (req->idiag_family == AF_INET) { |
c67499c0 | 270 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
271 | req->id.idiag_dport, req->id.idiag_src[0], |
272 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 273 | } |
505cbfc5 | 274 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 275 | else if (req->idiag_family == AF_INET6) { |
d86e0dac | 276 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
277 | (struct in6_addr *)req->id.idiag_dst, |
278 | req->id.idiag_dport, | |
279 | (struct in6_addr *)req->id.idiag_src, | |
280 | req->id.idiag_sport, | |
281 | req->id.idiag_if); | |
1da177e4 LT |
282 | } |
283 | #endif | |
284 | else { | |
d523a328 | 285 | goto unlock; |
1da177e4 LT |
286 | } |
287 | ||
d523a328 | 288 | err = -ENOENT; |
1da177e4 | 289 | if (sk == NULL) |
d523a328 | 290 | goto unlock; |
1da177e4 LT |
291 | |
292 | err = -ESTALE; | |
73c1f4a0 ACM |
293 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
294 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
295 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
296 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
297 | goto out; |
298 | ||
299 | err = -ENOMEM; | |
73c1f4a0 ACM |
300 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
301 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
302 | handler->idiag_info_size + 64)), |
303 | GFP_KERNEL); | |
1da177e4 LT |
304 | if (!rep) |
305 | goto out; | |
306 | ||
26932566 PM |
307 | err = sk_diag_fill(sk, rep, req->idiag_ext, |
308 | NETLINK_CB(in_skb).pid, | |
309 | nlh->nlmsg_seq, 0, nlh); | |
310 | if (err < 0) { | |
311 | WARN_ON(err == -EMSGSIZE); | |
312 | kfree_skb(rep); | |
313 | goto out; | |
314 | } | |
73c1f4a0 ACM |
315 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
316 | MSG_DONTWAIT); | |
1da177e4 LT |
317 | if (err > 0) |
318 | err = 0; | |
319 | ||
320 | out: | |
321 | if (sk) { | |
322 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 323 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
324 | else |
325 | sock_put(sk); | |
326 | } | |
d523a328 HX |
327 | unlock: |
328 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
329 | return err; |
330 | } | |
331 | ||
9f855299 | 332 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
333 | { |
334 | int words = bits >> 5; | |
335 | ||
336 | bits &= 0x1f; | |
337 | ||
338 | if (words) { | |
339 | if (memcmp(a1, a2, words << 2)) | |
340 | return 0; | |
341 | } | |
342 | if (bits) { | |
9f855299 AV |
343 | __be32 w1, w2; |
344 | __be32 mask; | |
1da177e4 LT |
345 | |
346 | w1 = a1[words]; | |
347 | w2 = a2[words]; | |
348 | ||
349 | mask = htonl((0xffffffff) << (32 - bits)); | |
350 | ||
351 | if ((w1 ^ w2) & mask) | |
352 | return 0; | |
353 | } | |
354 | ||
355 | return 1; | |
356 | } | |
357 | ||
358 | ||
73c1f4a0 | 359 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 360 | const struct inet_diag_entry *entry) |
1da177e4 LT |
361 | { |
362 | while (len > 0) { | |
363 | int yes = 1; | |
73c1f4a0 | 364 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
365 | |
366 | switch (op->code) { | |
73c1f4a0 | 367 | case INET_DIAG_BC_NOP: |
1da177e4 | 368 | break; |
73c1f4a0 | 369 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
370 | yes = 0; |
371 | break; | |
73c1f4a0 | 372 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
373 | yes = entry->sport >= op[1].no; |
374 | break; | |
73c1f4a0 | 375 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 376 | yes = entry->sport <= op[1].no; |
1da177e4 | 377 | break; |
73c1f4a0 | 378 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
379 | yes = entry->dport >= op[1].no; |
380 | break; | |
73c1f4a0 | 381 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
382 | yes = entry->dport <= op[1].no; |
383 | break; | |
73c1f4a0 | 384 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
385 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
386 | break; | |
73c1f4a0 | 387 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
388 | case INET_DIAG_BC_D_COND: { |
389 | struct inet_diag_hostcond *cond; | |
9f855299 | 390 | __be32 *addr; |
1da177e4 | 391 | |
a8c2190e | 392 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 393 | if (cond->port != -1 && |
73c1f4a0 | 394 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
395 | entry->sport : entry->dport)) { |
396 | yes = 0; | |
397 | break; | |
398 | } | |
4e852c02 | 399 | |
1da177e4 LT |
400 | if (cond->prefix_len == 0) |
401 | break; | |
402 | ||
73c1f4a0 | 403 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
404 | addr = entry->saddr; |
405 | else | |
406 | addr = entry->daddr; | |
407 | ||
4e852c02 ACM |
408 | if (bitstring_match(addr, cond->addr, |
409 | cond->prefix_len)) | |
1da177e4 LT |
410 | break; |
411 | if (entry->family == AF_INET6 && | |
412 | cond->family == AF_INET) { | |
413 | if (addr[0] == 0 && addr[1] == 0 && | |
414 | addr[2] == htonl(0xffff) && | |
a8c2190e | 415 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 416 | cond->prefix_len)) |
1da177e4 LT |
417 | break; |
418 | } | |
419 | yes = 0; | |
420 | break; | |
421 | } | |
422 | } | |
423 | ||
4e852c02 | 424 | if (yes) { |
1da177e4 LT |
425 | len -= op->yes; |
426 | bc += op->yes; | |
427 | } else { | |
428 | len -= op->no; | |
429 | bc += op->no; | |
430 | } | |
431 | } | |
a02cec21 | 432 | return len == 0; |
1da177e4 LT |
433 | } |
434 | ||
435 | static int valid_cc(const void *bc, int len, int cc) | |
436 | { | |
437 | while (len >= 0) { | |
73c1f4a0 | 438 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
439 | |
440 | if (cc > len) | |
441 | return 0; | |
442 | if (cc == len) | |
443 | return 1; | |
eeb14972 | 444 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
445 | return 0; |
446 | len -= op->yes; | |
447 | bc += op->yes; | |
448 | } | |
449 | return 0; | |
450 | } | |
451 | ||
73c1f4a0 | 452 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 453 | { |
eeb14972 | 454 | const void *bc = bytecode; |
1da177e4 LT |
455 | int len = bytecode_len; |
456 | ||
457 | while (len > 0) { | |
eeb14972 | 458 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
459 | |
460 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
461 | switch (op->code) { | |
73c1f4a0 ACM |
462 | case INET_DIAG_BC_AUTO: |
463 | case INET_DIAG_BC_S_COND: | |
464 | case INET_DIAG_BC_D_COND: | |
465 | case INET_DIAG_BC_S_GE: | |
466 | case INET_DIAG_BC_S_LE: | |
467 | case INET_DIAG_BC_D_GE: | |
468 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 469 | case INET_DIAG_BC_JMP: |
eeb14972 | 470 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
471 | return -EINVAL; |
472 | if (op->no < len && | |
a8c2190e | 473 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
474 | return -EINVAL; |
475 | break; | |
73c1f4a0 | 476 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
477 | break; |
478 | default: | |
479 | return -EINVAL; | |
480 | } | |
eeb14972 ED |
481 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
482 | return -EINVAL; | |
4e852c02 | 483 | bc += op->yes; |
1da177e4 LT |
484 | len -= op->yes; |
485 | } | |
486 | return len == 0 ? 0 : -EINVAL; | |
487 | } | |
488 | ||
dff2c035 ACM |
489 | static int inet_csk_diag_dump(struct sock *sk, |
490 | struct sk_buff *skb, | |
491 | struct netlink_callback *cb) | |
1da177e4 | 492 | { |
73c1f4a0 | 493 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 | 494 | |
22e76c84 | 495 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
73c1f4a0 | 496 | struct inet_diag_entry entry; |
22e76c84 NE |
497 | const struct nlattr *bc = nlmsg_find_attr(cb->nlh, |
498 | sizeof(*r), | |
499 | INET_DIAG_REQ_BYTECODE); | |
1da177e4 LT |
500 | struct inet_sock *inet = inet_sk(sk); |
501 | ||
502 | entry.family = sk->sk_family; | |
505cbfc5 | 503 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
504 | if (entry.family == AF_INET6) { |
505 | struct ipv6_pinfo *np = inet6_sk(sk); | |
506 | ||
507 | entry.saddr = np->rcv_saddr.s6_addr32; | |
508 | entry.daddr = np->daddr.s6_addr32; | |
509 | } else | |
510 | #endif | |
511 | { | |
c720c7e8 ED |
512 | entry.saddr = &inet->inet_rcv_saddr; |
513 | entry.daddr = &inet->inet_daddr; | |
1da177e4 | 514 | } |
c720c7e8 ED |
515 | entry.sport = inet->inet_num; |
516 | entry.dport = ntohs(inet->inet_dport); | |
1da177e4 LT |
517 | entry.userlocks = sk->sk_userlocks; |
518 | ||
22e76c84 | 519 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
1da177e4 LT |
520 | return 0; |
521 | } | |
522 | ||
dff2c035 ACM |
523 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
524 | NETLINK_CB(cb->skb).pid, | |
525 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
526 | } |
527 | ||
c7d58aab ACM |
528 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
529 | struct sk_buff *skb, | |
530 | struct netlink_callback *cb) | |
531 | { | |
532 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
533 | ||
22e76c84 | 534 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
c7d58aab | 535 | struct inet_diag_entry entry; |
22e76c84 NE |
536 | const struct nlattr *bc = nlmsg_find_attr(cb->nlh, |
537 | sizeof(*r), | |
538 | INET_DIAG_REQ_BYTECODE); | |
c7d58aab ACM |
539 | |
540 | entry.family = tw->tw_family; | |
541 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
542 | if (tw->tw_family == AF_INET6) { | |
543 | struct inet6_timewait_sock *tw6 = | |
544 | inet6_twsk((struct sock *)tw); | |
545 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
546 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
547 | } else | |
548 | #endif | |
549 | { | |
550 | entry.saddr = &tw->tw_rcv_saddr; | |
551 | entry.daddr = &tw->tw_daddr; | |
552 | } | |
553 | entry.sport = tw->tw_num; | |
554 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 555 | entry.userlocks = 0; |
c7d58aab | 556 | |
22e76c84 | 557 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
c7d58aab ACM |
558 | return 0; |
559 | } | |
560 | ||
561 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
562 | NETLINK_CB(cb->skb).pid, | |
563 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
564 | } | |
565 | ||
73c1f4a0 | 566 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
567 | struct request_sock *req, u32 pid, u32 seq, |
568 | const struct nlmsghdr *unlh) | |
1da177e4 | 569 | { |
2e6599cb | 570 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 571 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 572 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 573 | struct inet_diag_msg *r; |
1da177e4 LT |
574 | struct nlmsghdr *nlh; |
575 | long tmo; | |
576 | ||
540722ff | 577 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
578 | nlh->nlmsg_flags = NLM_F_MULTI; |
579 | r = NLMSG_DATA(nlh); | |
580 | ||
73c1f4a0 ACM |
581 | r->idiag_family = sk->sk_family; |
582 | r->idiag_state = TCP_SYN_RECV; | |
583 | r->idiag_timer = 1; | |
584 | r->idiag_retrans = req->retrans; | |
1da177e4 | 585 | |
73c1f4a0 ACM |
586 | r->id.idiag_if = sk->sk_bound_dev_if; |
587 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
588 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
589 | |
590 | tmo = req->expires - jiffies; | |
591 | if (tmo < 0) | |
592 | tmo = 0; | |
593 | ||
c720c7e8 | 594 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
595 | r->id.idiag_dport = ireq->rmt_port; |
596 | r->id.idiag_src[0] = ireq->loc_addr; | |
597 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
598 | r->idiag_expires = jiffies_to_msecs(tmo); | |
599 | r->idiag_rqueue = 0; | |
600 | r->idiag_wqueue = 0; | |
601 | r->idiag_uid = sock_i_uid(sk); | |
602 | r->idiag_inode = 0; | |
505cbfc5 | 603 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 604 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
605 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
606 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
607 | } |
608 | #endif | |
27a884dc | 609 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
610 | |
611 | return skb->len; | |
612 | ||
613 | nlmsg_failure: | |
dc5fc579 | 614 | nlmsg_trim(skb, b); |
1da177e4 LT |
615 | return -1; |
616 | } | |
617 | ||
73c1f4a0 | 618 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 619 | struct netlink_callback *cb) |
1da177e4 | 620 | { |
73c1f4a0 ACM |
621 | struct inet_diag_entry entry; |
622 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 623 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 624 | struct listen_sock *lopt; |
22e76c84 | 625 | const struct nlattr *bc = NULL; |
1da177e4 LT |
626 | struct inet_sock *inet = inet_sk(sk); |
627 | int j, s_j; | |
628 | int reqnum, s_reqnum; | |
629 | int err = 0; | |
630 | ||
631 | s_j = cb->args[3]; | |
632 | s_reqnum = cb->args[4]; | |
633 | ||
634 | if (s_j > 0) | |
635 | s_j--; | |
636 | ||
637 | entry.family = sk->sk_family; | |
638 | ||
463c84b9 | 639 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 640 | |
463c84b9 | 641 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
642 | if (!lopt || !lopt->qlen) |
643 | goto out; | |
644 | ||
22e76c84 NE |
645 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
646 | bc = nlmsg_find_attr(cb->nlh, sizeof(*r), | |
647 | INET_DIAG_REQ_BYTECODE); | |
c720c7e8 | 648 | entry.sport = inet->inet_num; |
1da177e4 LT |
649 | entry.userlocks = sk->sk_userlocks; |
650 | } | |
651 | ||
540722ff | 652 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 653 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
654 | |
655 | reqnum = 0; | |
656 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
657 | struct inet_request_sock *ireq = inet_rsk(req); |
658 | ||
1da177e4 LT |
659 | if (reqnum < s_reqnum) |
660 | continue; | |
73c1f4a0 ACM |
661 | if (r->id.idiag_dport != ireq->rmt_port && |
662 | r->id.idiag_dport) | |
1da177e4 LT |
663 | continue; |
664 | ||
665 | if (bc) { | |
666 | entry.saddr = | |
505cbfc5 | 667 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 668 | (entry.family == AF_INET6) ? |
ca304b61 | 669 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 670 | #endif |
2e6599cb | 671 | &ireq->loc_addr; |
4e852c02 | 672 | entry.daddr = |
505cbfc5 | 673 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 674 | (entry.family == AF_INET6) ? |
ca304b61 | 675 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 676 | #endif |
2e6599cb ACM |
677 | &ireq->rmt_addr; |
678 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 679 | |
22e76c84 NE |
680 | if (!inet_diag_bc_run(nla_data(bc), |
681 | nla_len(bc), &entry)) | |
1da177e4 LT |
682 | continue; |
683 | } | |
684 | ||
73c1f4a0 | 685 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 686 | NETLINK_CB(cb->skb).pid, |
540722ff | 687 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
688 | if (err < 0) { |
689 | cb->args[3] = j + 1; | |
690 | cb->args[4] = reqnum; | |
691 | goto out; | |
692 | } | |
693 | } | |
694 | ||
695 | s_reqnum = 0; | |
696 | } | |
697 | ||
698 | out: | |
463c84b9 | 699 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
700 | |
701 | return err; | |
702 | } | |
703 | ||
73c1f4a0 | 704 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
705 | { |
706 | int i, num; | |
707 | int s_i, s_num; | |
73c1f4a0 | 708 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 709 | const struct inet_diag_handler *handler; |
540722ff | 710 | struct inet_hashinfo *hashinfo; |
1da177e4 | 711 | |
d523a328 | 712 | handler = inet_diag_lock_handler(cb->nlh->nlmsg_type); |
8cf8e5a6 ACM |
713 | if (IS_ERR(handler)) |
714 | goto unlock; | |
d523a328 | 715 | |
4f5736c4 | 716 | hashinfo = handler->idiag_hashinfo; |
4e852c02 | 717 | |
1da177e4 LT |
718 | s_i = cb->args[1]; |
719 | s_num = num = cb->args[2]; | |
4f5736c4 | 720 | |
1da177e4 | 721 | if (cb->args[0] == 0) { |
73c1f4a0 | 722 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 723 | goto skip_listen_ht; |
540722ff | 724 | |
0f7ff927 | 725 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 726 | struct sock *sk; |
c25eb3bf | 727 | struct hlist_nulls_node *node; |
5caea4ea | 728 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
729 | |
730 | num = 0; | |
5caea4ea ED |
731 | ilb = &hashinfo->listening_hash[i]; |
732 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 733 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
734 | struct inet_sock *inet = inet_sk(sk); |
735 | ||
736 | if (num < s_num) { | |
737 | num++; | |
738 | continue; | |
739 | } | |
740 | ||
c720c7e8 | 741 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 742 | r->id.idiag_sport) |
1da177e4 LT |
743 | goto next_listen; |
744 | ||
73c1f4a0 ACM |
745 | if (!(r->idiag_states & TCPF_LISTEN) || |
746 | r->id.idiag_dport || | |
1da177e4 LT |
747 | cb->args[3] > 0) |
748 | goto syn_recv; | |
749 | ||
dff2c035 | 750 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
5caea4ea | 751 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
752 | goto done; |
753 | } | |
754 | ||
755 | syn_recv: | |
73c1f4a0 | 756 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
757 | goto next_listen; |
758 | ||
73c1f4a0 | 759 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
5caea4ea | 760 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
761 | goto done; |
762 | } | |
763 | ||
764 | next_listen: | |
765 | cb->args[3] = 0; | |
766 | cb->args[4] = 0; | |
767 | ++num; | |
768 | } | |
5caea4ea | 769 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
770 | |
771 | s_num = 0; | |
772 | cb->args[3] = 0; | |
773 | cb->args[4] = 0; | |
774 | } | |
1da177e4 LT |
775 | skip_listen_ht: |
776 | cb->args[0] = 1; | |
777 | s_i = num = s_num = 0; | |
778 | } | |
779 | ||
73c1f4a0 | 780 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
d523a328 | 781 | goto unlock; |
1da177e4 | 782 | |
f373b53b | 783 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 784 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 785 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 786 | struct sock *sk; |
3ab5aee7 | 787 | struct hlist_nulls_node *node; |
1da177e4 | 788 | |
6be547a6 AK |
789 | num = 0; |
790 | ||
3ab5aee7 ED |
791 | if (hlist_nulls_empty(&head->chain) && |
792 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
793 | continue; |
794 | ||
1da177e4 LT |
795 | if (i > s_i) |
796 | s_num = 0; | |
797 | ||
7e3aab4a | 798 | spin_lock_bh(lock); |
3ab5aee7 | 799 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
800 | struct inet_sock *inet = inet_sk(sk); |
801 | ||
802 | if (num < s_num) | |
803 | goto next_normal; | |
73c1f4a0 | 804 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 805 | goto next_normal; |
c720c7e8 | 806 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 807 | r->id.idiag_sport) |
1da177e4 | 808 | goto next_normal; |
c720c7e8 | 809 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 810 | r->id.idiag_dport) |
1da177e4 | 811 | goto next_normal; |
dff2c035 | 812 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
7e3aab4a | 813 | spin_unlock_bh(lock); |
1da177e4 LT |
814 | goto done; |
815 | } | |
816 | next_normal: | |
817 | ++num; | |
818 | } | |
819 | ||
73c1f4a0 | 820 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
821 | struct inet_timewait_sock *tw; |
822 | ||
823 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 824 | &head->twchain) { |
1da177e4 LT |
825 | |
826 | if (num < s_num) | |
827 | goto next_dying; | |
7dbf0755 | 828 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 829 | r->id.idiag_sport) |
1da177e4 | 830 | goto next_dying; |
7dbf0755 | 831 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 832 | r->id.idiag_dport) |
1da177e4 | 833 | goto next_dying; |
c7d58aab | 834 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
7e3aab4a | 835 | spin_unlock_bh(lock); |
1da177e4 LT |
836 | goto done; |
837 | } | |
838 | next_dying: | |
839 | ++num; | |
840 | } | |
841 | } | |
7e3aab4a | 842 | spin_unlock_bh(lock); |
1da177e4 LT |
843 | } |
844 | ||
845 | done: | |
846 | cb->args[1] = i; | |
847 | cb->args[2] = num; | |
d523a328 HX |
848 | unlock: |
849 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
850 | return skb->len; |
851 | } | |
852 | ||
ead592ba | 853 | static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 854 | { |
ead592ba | 855 | int hdrlen = sizeof(struct inet_diag_req); |
1da177e4 | 856 | |
ead592ba TG |
857 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
858 | nlmsg_len(nlh) < hdrlen) | |
859 | return -EINVAL; | |
1da177e4 | 860 | |
b8f3ab42 | 861 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
862 | if (nlmsg_attrlen(nlh, hdrlen)) { |
863 | struct nlattr *attr; | |
1da177e4 | 864 | |
ead592ba TG |
865 | attr = nlmsg_find_attr(nlh, hdrlen, |
866 | INET_DIAG_REQ_BYTECODE); | |
867 | if (attr == NULL || | |
868 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
869 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
870 | return -EINVAL; | |
871 | } | |
1da177e4 | 872 | |
c702e804 | 873 | return netlink_dump_start(idiagnl, skb, nlh, |
c7ac8679 | 874 | inet_diag_dump, NULL, 0); |
1da177e4 | 875 | } |
ead592ba TG |
876 | |
877 | return inet_diag_get_exact(skb, nlh); | |
1da177e4 LT |
878 | } |
879 | ||
0a9c7301 PM |
880 | static DEFINE_MUTEX(inet_diag_mutex); |
881 | ||
cd40b7d3 | 882 | static void inet_diag_rcv(struct sk_buff *skb) |
1da177e4 | 883 | { |
cd40b7d3 DL |
884 | mutex_lock(&inet_diag_mutex); |
885 | netlink_rcv_skb(skb, &inet_diag_rcv_msg); | |
886 | mutex_unlock(&inet_diag_mutex); | |
1da177e4 LT |
887 | } |
888 | ||
4f5736c4 ACM |
889 | int inet_diag_register(const struct inet_diag_handler *h) |
890 | { | |
891 | const __u16 type = h->idiag_type; | |
892 | int err = -EINVAL; | |
893 | ||
894 | if (type >= INET_DIAG_GETSOCK_MAX) | |
895 | goto out; | |
896 | ||
d523a328 | 897 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
898 | err = -EEXIST; |
899 | if (inet_diag_table[type] == NULL) { | |
900 | inet_diag_table[type] = h; | |
901 | err = 0; | |
902 | } | |
d523a328 | 903 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
904 | out: |
905 | return err; | |
906 | } | |
907 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
908 | ||
909 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
910 | { | |
911 | const __u16 type = h->idiag_type; | |
912 | ||
913 | if (type >= INET_DIAG_GETSOCK_MAX) | |
914 | return; | |
915 | ||
d523a328 | 916 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 917 | inet_diag_table[type] = NULL; |
d523a328 | 918 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
919 | } |
920 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
921 | ||
73c1f4a0 | 922 | static int __init inet_diag_init(void) |
1da177e4 | 923 | { |
4f5736c4 ACM |
924 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
925 | sizeof(struct inet_diag_handler *)); | |
926 | int err = -ENOMEM; | |
927 | ||
0da974f4 | 928 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
929 | if (!inet_diag_table) |
930 | goto out; | |
931 | ||
b4b51029 | 932 | idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0, |
d523a328 | 933 | inet_diag_rcv, NULL, THIS_MODULE); |
73c1f4a0 | 934 | if (idiagnl == NULL) |
4f5736c4 | 935 | goto out_free_table; |
17b085ea | 936 | err = 0; |
4f5736c4 ACM |
937 | out: |
938 | return err; | |
4f5736c4 ACM |
939 | out_free_table: |
940 | kfree(inet_diag_table); | |
941 | goto out; | |
1da177e4 LT |
942 | } |
943 | ||
73c1f4a0 | 944 | static void __exit inet_diag_exit(void) |
1da177e4 | 945 | { |
b7c6ba6e | 946 | netlink_kernel_release(idiagnl); |
4f5736c4 | 947 | kfree(inet_diag_table); |
1da177e4 LT |
948 | } |
949 | ||
73c1f4a0 ACM |
950 | module_init(inet_diag_init); |
951 | module_exit(inet_diag_exit); | |
1da177e4 | 952 | MODULE_LICENSE("GPL"); |
305e1e96 | 953 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG); |