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 | |
505cbfc5 | 125 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 126 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 127 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 128 | |
73c1f4a0 | 129 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
1da177e4 | 130 | &np->rcv_saddr); |
73c1f4a0 | 131 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
1da177e4 LT |
132 | &np->daddr); |
133 | } | |
134 | #endif | |
135 | ||
172589cc | 136 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 137 | |
463c84b9 | 138 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
139 | r->idiag_timer = 1; |
140 | r->idiag_retrans = icsk->icsk_retransmits; | |
141 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 142 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
143 | r->idiag_timer = 4; |
144 | r->idiag_retrans = icsk->icsk_probes_out; | |
145 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 146 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
147 | r->idiag_timer = 2; |
148 | r->idiag_retrans = icsk->icsk_probes_out; | |
149 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 150 | } else { |
73c1f4a0 ACM |
151 | r->idiag_timer = 0; |
152 | r->idiag_expires = 0; | |
1da177e4 LT |
153 | } |
154 | #undef EXPIRES_IN_MS | |
540722ff | 155 | |
73c1f4a0 ACM |
156 | r->idiag_uid = sock_i_uid(sk); |
157 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
158 | |
159 | if (minfo) { | |
31e6d363 | 160 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); |
73c1f4a0 ACM |
161 | minfo->idiag_wmem = sk->sk_wmem_queued; |
162 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
31e6d363 | 163 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); |
1da177e4 LT |
164 | } |
165 | ||
4f5736c4 | 166 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 167 | |
6687e988 ACM |
168 | if (sk->sk_state < TCP_TIME_WAIT && |
169 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
170 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 171 | |
27a884dc | 172 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
173 | return skb->len; |
174 | ||
7c99c909 | 175 | rtattr_failure: |
1da177e4 | 176 | nlmsg_failure: |
dc5fc579 | 177 | nlmsg_trim(skb, b); |
26932566 | 178 | return -EMSGSIZE; |
1da177e4 LT |
179 | } |
180 | ||
c7d58aab ACM |
181 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
182 | struct sk_buff *skb, int ext, u32 pid, | |
183 | u32 seq, u16 nlmsg_flags, | |
184 | const struct nlmsghdr *unlh) | |
185 | { | |
186 | long tmo; | |
187 | struct inet_diag_msg *r; | |
27a884dc | 188 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
189 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
190 | unlh->nlmsg_type, sizeof(*r)); | |
191 | ||
192 | r = NLMSG_DATA(nlh); | |
193 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
194 | ||
195 | nlh->nlmsg_flags = nlmsg_flags; | |
196 | ||
197 | tmo = tw->tw_ttd - jiffies; | |
198 | if (tmo < 0) | |
199 | tmo = 0; | |
200 | ||
201 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
202 | r->idiag_retrans = 0; |
203 | r->id.idiag_if = tw->tw_bound_dev_if; | |
204 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
205 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
206 | r->id.idiag_sport = tw->tw_sport; | |
207 | r->id.idiag_dport = tw->tw_dport; | |
208 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
209 | r->id.idiag_dst[0] = tw->tw_daddr; | |
210 | r->idiag_state = tw->tw_substate; | |
211 | r->idiag_timer = 3; | |
172589cc | 212 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
213 | r->idiag_rqueue = 0; |
214 | r->idiag_wqueue = 0; | |
215 | r->idiag_uid = 0; | |
216 | r->idiag_inode = 0; | |
217 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
218 | if (tw->tw_family == AF_INET6) { | |
219 | const struct inet6_timewait_sock *tw6 = | |
220 | inet6_twsk((struct sock *)tw); | |
221 | ||
222 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
223 | &tw6->tw_v6_rcv_saddr); | |
224 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, | |
225 | &tw6->tw_v6_daddr); | |
226 | } | |
227 | #endif | |
27a884dc | 228 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
229 | return skb->len; |
230 | nlmsg_failure: | |
dc5fc579 | 231 | nlmsg_trim(skb, previous_tail); |
26932566 | 232 | return -EMSGSIZE; |
c7d58aab ACM |
233 | } |
234 | ||
dff2c035 ACM |
235 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
236 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
237 | const struct nlmsghdr *unlh) | |
238 | { | |
239 | if (sk->sk_state == TCP_TIME_WAIT) | |
240 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
241 | skb, ext, pid, seq, nlmsg_flags, | |
242 | unlh); | |
243 | return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh); | |
244 | } | |
245 | ||
4e852c02 ACM |
246 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
247 | const struct nlmsghdr *nlh) | |
1da177e4 LT |
248 | { |
249 | int err; | |
250 | struct sock *sk; | |
73c1f4a0 | 251 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 252 | struct sk_buff *rep; |
4f5736c4 ACM |
253 | struct inet_hashinfo *hashinfo; |
254 | const struct inet_diag_handler *handler; | |
255 | ||
d523a328 | 256 | handler = inet_diag_lock_handler(nlh->nlmsg_type); |
8cf8e5a6 ACM |
257 | if (IS_ERR(handler)) { |
258 | err = PTR_ERR(handler); | |
259 | goto unlock; | |
260 | } | |
d523a328 | 261 | |
4f5736c4 | 262 | hashinfo = handler->idiag_hashinfo; |
d523a328 | 263 | err = -EINVAL; |
4f5736c4 | 264 | |
73c1f4a0 | 265 | if (req->idiag_family == AF_INET) { |
c67499c0 | 266 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
267 | req->id.idiag_dport, req->id.idiag_src[0], |
268 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 269 | } |
505cbfc5 | 270 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 271 | else if (req->idiag_family == AF_INET6) { |
d86e0dac | 272 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
273 | (struct in6_addr *)req->id.idiag_dst, |
274 | req->id.idiag_dport, | |
275 | (struct in6_addr *)req->id.idiag_src, | |
276 | req->id.idiag_sport, | |
277 | req->id.idiag_if); | |
1da177e4 LT |
278 | } |
279 | #endif | |
280 | else { | |
d523a328 | 281 | goto unlock; |
1da177e4 LT |
282 | } |
283 | ||
d523a328 | 284 | err = -ENOENT; |
1da177e4 | 285 | if (sk == NULL) |
d523a328 | 286 | goto unlock; |
1da177e4 LT |
287 | |
288 | err = -ESTALE; | |
73c1f4a0 ACM |
289 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
290 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
291 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
292 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
293 | goto out; |
294 | ||
295 | err = -ENOMEM; | |
73c1f4a0 ACM |
296 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
297 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
298 | handler->idiag_info_size + 64)), |
299 | GFP_KERNEL); | |
1da177e4 LT |
300 | if (!rep) |
301 | goto out; | |
302 | ||
26932566 PM |
303 | err = sk_diag_fill(sk, rep, req->idiag_ext, |
304 | NETLINK_CB(in_skb).pid, | |
305 | nlh->nlmsg_seq, 0, nlh); | |
306 | if (err < 0) { | |
307 | WARN_ON(err == -EMSGSIZE); | |
308 | kfree_skb(rep); | |
309 | goto out; | |
310 | } | |
73c1f4a0 ACM |
311 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
312 | MSG_DONTWAIT); | |
1da177e4 LT |
313 | if (err > 0) |
314 | err = 0; | |
315 | ||
316 | out: | |
317 | if (sk) { | |
318 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 319 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
320 | else |
321 | sock_put(sk); | |
322 | } | |
d523a328 HX |
323 | unlock: |
324 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
325 | return err; |
326 | } | |
327 | ||
9f855299 | 328 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
329 | { |
330 | int words = bits >> 5; | |
331 | ||
332 | bits &= 0x1f; | |
333 | ||
334 | if (words) { | |
335 | if (memcmp(a1, a2, words << 2)) | |
336 | return 0; | |
337 | } | |
338 | if (bits) { | |
9f855299 AV |
339 | __be32 w1, w2; |
340 | __be32 mask; | |
1da177e4 LT |
341 | |
342 | w1 = a1[words]; | |
343 | w2 = a2[words]; | |
344 | ||
345 | mask = htonl((0xffffffff) << (32 - bits)); | |
346 | ||
347 | if ((w1 ^ w2) & mask) | |
348 | return 0; | |
349 | } | |
350 | ||
351 | return 1; | |
352 | } | |
353 | ||
354 | ||
73c1f4a0 | 355 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 356 | const struct inet_diag_entry *entry) |
1da177e4 LT |
357 | { |
358 | while (len > 0) { | |
359 | int yes = 1; | |
73c1f4a0 | 360 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
361 | |
362 | switch (op->code) { | |
73c1f4a0 | 363 | case INET_DIAG_BC_NOP: |
1da177e4 | 364 | break; |
73c1f4a0 | 365 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
366 | yes = 0; |
367 | break; | |
73c1f4a0 | 368 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
369 | yes = entry->sport >= op[1].no; |
370 | break; | |
73c1f4a0 | 371 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 372 | yes = entry->sport <= op[1].no; |
1da177e4 | 373 | break; |
73c1f4a0 | 374 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
375 | yes = entry->dport >= op[1].no; |
376 | break; | |
73c1f4a0 | 377 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
378 | yes = entry->dport <= op[1].no; |
379 | break; | |
73c1f4a0 | 380 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
381 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
382 | break; | |
73c1f4a0 | 383 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
384 | case INET_DIAG_BC_D_COND: { |
385 | struct inet_diag_hostcond *cond; | |
9f855299 | 386 | __be32 *addr; |
1da177e4 | 387 | |
a8c2190e | 388 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 389 | if (cond->port != -1 && |
73c1f4a0 | 390 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
391 | entry->sport : entry->dport)) { |
392 | yes = 0; | |
393 | break; | |
394 | } | |
4e852c02 | 395 | |
1da177e4 LT |
396 | if (cond->prefix_len == 0) |
397 | break; | |
398 | ||
73c1f4a0 | 399 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
400 | addr = entry->saddr; |
401 | else | |
402 | addr = entry->daddr; | |
403 | ||
4e852c02 ACM |
404 | if (bitstring_match(addr, cond->addr, |
405 | cond->prefix_len)) | |
1da177e4 LT |
406 | break; |
407 | if (entry->family == AF_INET6 && | |
408 | cond->family == AF_INET) { | |
409 | if (addr[0] == 0 && addr[1] == 0 && | |
410 | addr[2] == htonl(0xffff) && | |
a8c2190e | 411 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 412 | cond->prefix_len)) |
1da177e4 LT |
413 | break; |
414 | } | |
415 | yes = 0; | |
416 | break; | |
417 | } | |
418 | } | |
419 | ||
4e852c02 | 420 | if (yes) { |
1da177e4 LT |
421 | len -= op->yes; |
422 | bc += op->yes; | |
423 | } else { | |
424 | len -= op->no; | |
425 | bc += op->no; | |
426 | } | |
427 | } | |
a02cec21 | 428 | return len == 0; |
1da177e4 LT |
429 | } |
430 | ||
431 | static int valid_cc(const void *bc, int len, int cc) | |
432 | { | |
433 | while (len >= 0) { | |
73c1f4a0 | 434 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
435 | |
436 | if (cc > len) | |
437 | return 0; | |
438 | if (cc == len) | |
439 | return 1; | |
eeb14972 | 440 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
441 | return 0; |
442 | len -= op->yes; | |
443 | bc += op->yes; | |
444 | } | |
445 | return 0; | |
446 | } | |
447 | ||
73c1f4a0 | 448 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 449 | { |
eeb14972 | 450 | const void *bc = bytecode; |
1da177e4 LT |
451 | int len = bytecode_len; |
452 | ||
453 | while (len > 0) { | |
eeb14972 | 454 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
455 | |
456 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
457 | switch (op->code) { | |
73c1f4a0 ACM |
458 | case INET_DIAG_BC_AUTO: |
459 | case INET_DIAG_BC_S_COND: | |
460 | case INET_DIAG_BC_D_COND: | |
461 | case INET_DIAG_BC_S_GE: | |
462 | case INET_DIAG_BC_S_LE: | |
463 | case INET_DIAG_BC_D_GE: | |
464 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 465 | case INET_DIAG_BC_JMP: |
eeb14972 | 466 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
467 | return -EINVAL; |
468 | if (op->no < len && | |
a8c2190e | 469 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
470 | return -EINVAL; |
471 | break; | |
73c1f4a0 | 472 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
473 | break; |
474 | default: | |
475 | return -EINVAL; | |
476 | } | |
eeb14972 ED |
477 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
478 | return -EINVAL; | |
4e852c02 | 479 | bc += op->yes; |
1da177e4 LT |
480 | len -= op->yes; |
481 | } | |
482 | return len == 0 ? 0 : -EINVAL; | |
483 | } | |
484 | ||
dff2c035 ACM |
485 | static int inet_csk_diag_dump(struct sock *sk, |
486 | struct sk_buff *skb, | |
487 | struct netlink_callback *cb) | |
1da177e4 | 488 | { |
73c1f4a0 | 489 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 | 490 | |
22e76c84 | 491 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
73c1f4a0 | 492 | struct inet_diag_entry entry; |
22e76c84 NE |
493 | const struct nlattr *bc = nlmsg_find_attr(cb->nlh, |
494 | sizeof(*r), | |
495 | INET_DIAG_REQ_BYTECODE); | |
1da177e4 LT |
496 | struct inet_sock *inet = inet_sk(sk); |
497 | ||
498 | entry.family = sk->sk_family; | |
505cbfc5 | 499 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
500 | if (entry.family == AF_INET6) { |
501 | struct ipv6_pinfo *np = inet6_sk(sk); | |
502 | ||
503 | entry.saddr = np->rcv_saddr.s6_addr32; | |
504 | entry.daddr = np->daddr.s6_addr32; | |
505 | } else | |
506 | #endif | |
507 | { | |
c720c7e8 ED |
508 | entry.saddr = &inet->inet_rcv_saddr; |
509 | entry.daddr = &inet->inet_daddr; | |
1da177e4 | 510 | } |
c720c7e8 ED |
511 | entry.sport = inet->inet_num; |
512 | entry.dport = ntohs(inet->inet_dport); | |
1da177e4 LT |
513 | entry.userlocks = sk->sk_userlocks; |
514 | ||
22e76c84 | 515 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
1da177e4 LT |
516 | return 0; |
517 | } | |
518 | ||
dff2c035 ACM |
519 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
520 | NETLINK_CB(cb->skb).pid, | |
521 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
522 | } |
523 | ||
c7d58aab ACM |
524 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
525 | struct sk_buff *skb, | |
526 | struct netlink_callback *cb) | |
527 | { | |
528 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
529 | ||
22e76c84 | 530 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
c7d58aab | 531 | struct inet_diag_entry entry; |
22e76c84 NE |
532 | const struct nlattr *bc = nlmsg_find_attr(cb->nlh, |
533 | sizeof(*r), | |
534 | INET_DIAG_REQ_BYTECODE); | |
c7d58aab ACM |
535 | |
536 | entry.family = tw->tw_family; | |
537 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
538 | if (tw->tw_family == AF_INET6) { | |
539 | struct inet6_timewait_sock *tw6 = | |
540 | inet6_twsk((struct sock *)tw); | |
541 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
542 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
543 | } else | |
544 | #endif | |
545 | { | |
546 | entry.saddr = &tw->tw_rcv_saddr; | |
547 | entry.daddr = &tw->tw_daddr; | |
548 | } | |
549 | entry.sport = tw->tw_num; | |
550 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 551 | entry.userlocks = 0; |
c7d58aab | 552 | |
22e76c84 | 553 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
c7d58aab ACM |
554 | return 0; |
555 | } | |
556 | ||
557 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
558 | NETLINK_CB(cb->skb).pid, | |
559 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
560 | } | |
561 | ||
73c1f4a0 | 562 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
563 | struct request_sock *req, u32 pid, u32 seq, |
564 | const struct nlmsghdr *unlh) | |
1da177e4 | 565 | { |
2e6599cb | 566 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 567 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 568 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 569 | struct inet_diag_msg *r; |
1da177e4 LT |
570 | struct nlmsghdr *nlh; |
571 | long tmo; | |
572 | ||
540722ff | 573 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
574 | nlh->nlmsg_flags = NLM_F_MULTI; |
575 | r = NLMSG_DATA(nlh); | |
576 | ||
73c1f4a0 ACM |
577 | r->idiag_family = sk->sk_family; |
578 | r->idiag_state = TCP_SYN_RECV; | |
579 | r->idiag_timer = 1; | |
580 | r->idiag_retrans = req->retrans; | |
1da177e4 | 581 | |
73c1f4a0 ACM |
582 | r->id.idiag_if = sk->sk_bound_dev_if; |
583 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
584 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
585 | |
586 | tmo = req->expires - jiffies; | |
587 | if (tmo < 0) | |
588 | tmo = 0; | |
589 | ||
c720c7e8 | 590 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
591 | r->id.idiag_dport = ireq->rmt_port; |
592 | r->id.idiag_src[0] = ireq->loc_addr; | |
593 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
594 | r->idiag_expires = jiffies_to_msecs(tmo); | |
595 | r->idiag_rqueue = 0; | |
596 | r->idiag_wqueue = 0; | |
597 | r->idiag_uid = sock_i_uid(sk); | |
598 | r->idiag_inode = 0; | |
505cbfc5 | 599 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
600 | if (r->idiag_family == AF_INET6) { |
601 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
ca304b61 | 602 | &inet6_rsk(req)->loc_addr); |
73c1f4a0 | 603 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
ca304b61 | 604 | &inet6_rsk(req)->rmt_addr); |
1da177e4 LT |
605 | } |
606 | #endif | |
27a884dc | 607 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
608 | |
609 | return skb->len; | |
610 | ||
611 | nlmsg_failure: | |
dc5fc579 | 612 | nlmsg_trim(skb, b); |
1da177e4 LT |
613 | return -1; |
614 | } | |
615 | ||
73c1f4a0 | 616 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 617 | struct netlink_callback *cb) |
1da177e4 | 618 | { |
73c1f4a0 ACM |
619 | struct inet_diag_entry entry; |
620 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 621 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 622 | struct listen_sock *lopt; |
22e76c84 | 623 | const struct nlattr *bc = NULL; |
1da177e4 LT |
624 | struct inet_sock *inet = inet_sk(sk); |
625 | int j, s_j; | |
626 | int reqnum, s_reqnum; | |
627 | int err = 0; | |
628 | ||
629 | s_j = cb->args[3]; | |
630 | s_reqnum = cb->args[4]; | |
631 | ||
632 | if (s_j > 0) | |
633 | s_j--; | |
634 | ||
635 | entry.family = sk->sk_family; | |
636 | ||
463c84b9 | 637 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 638 | |
463c84b9 | 639 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
640 | if (!lopt || !lopt->qlen) |
641 | goto out; | |
642 | ||
22e76c84 NE |
643 | if (nlmsg_attrlen(cb->nlh, sizeof(*r))) { |
644 | bc = nlmsg_find_attr(cb->nlh, sizeof(*r), | |
645 | INET_DIAG_REQ_BYTECODE); | |
c720c7e8 | 646 | entry.sport = inet->inet_num; |
1da177e4 LT |
647 | entry.userlocks = sk->sk_userlocks; |
648 | } | |
649 | ||
540722ff | 650 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 651 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
652 | |
653 | reqnum = 0; | |
654 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
655 | struct inet_request_sock *ireq = inet_rsk(req); |
656 | ||
1da177e4 LT |
657 | if (reqnum < s_reqnum) |
658 | continue; | |
73c1f4a0 ACM |
659 | if (r->id.idiag_dport != ireq->rmt_port && |
660 | r->id.idiag_dport) | |
1da177e4 LT |
661 | continue; |
662 | ||
663 | if (bc) { | |
664 | entry.saddr = | |
505cbfc5 | 665 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 666 | (entry.family == AF_INET6) ? |
ca304b61 | 667 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 668 | #endif |
2e6599cb | 669 | &ireq->loc_addr; |
4e852c02 | 670 | entry.daddr = |
505cbfc5 | 671 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 672 | (entry.family == AF_INET6) ? |
ca304b61 | 673 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 674 | #endif |
2e6599cb ACM |
675 | &ireq->rmt_addr; |
676 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 677 | |
22e76c84 NE |
678 | if (!inet_diag_bc_run(nla_data(bc), |
679 | nla_len(bc), &entry)) | |
1da177e4 LT |
680 | continue; |
681 | } | |
682 | ||
73c1f4a0 | 683 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 684 | NETLINK_CB(cb->skb).pid, |
540722ff | 685 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
686 | if (err < 0) { |
687 | cb->args[3] = j + 1; | |
688 | cb->args[4] = reqnum; | |
689 | goto out; | |
690 | } | |
691 | } | |
692 | ||
693 | s_reqnum = 0; | |
694 | } | |
695 | ||
696 | out: | |
463c84b9 | 697 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
698 | |
699 | return err; | |
700 | } | |
701 | ||
73c1f4a0 | 702 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
703 | { |
704 | int i, num; | |
705 | int s_i, s_num; | |
73c1f4a0 | 706 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 707 | const struct inet_diag_handler *handler; |
540722ff | 708 | struct inet_hashinfo *hashinfo; |
1da177e4 | 709 | |
d523a328 | 710 | handler = inet_diag_lock_handler(cb->nlh->nlmsg_type); |
8cf8e5a6 ACM |
711 | if (IS_ERR(handler)) |
712 | goto unlock; | |
d523a328 | 713 | |
4f5736c4 | 714 | hashinfo = handler->idiag_hashinfo; |
4e852c02 | 715 | |
1da177e4 LT |
716 | s_i = cb->args[1]; |
717 | s_num = num = cb->args[2]; | |
4f5736c4 | 718 | |
1da177e4 | 719 | if (cb->args[0] == 0) { |
73c1f4a0 | 720 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 721 | goto skip_listen_ht; |
540722ff | 722 | |
0f7ff927 | 723 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 724 | struct sock *sk; |
c25eb3bf | 725 | struct hlist_nulls_node *node; |
5caea4ea | 726 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
727 | |
728 | num = 0; | |
5caea4ea ED |
729 | ilb = &hashinfo->listening_hash[i]; |
730 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 731 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
732 | struct inet_sock *inet = inet_sk(sk); |
733 | ||
734 | if (num < s_num) { | |
735 | num++; | |
736 | continue; | |
737 | } | |
738 | ||
c720c7e8 | 739 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 740 | r->id.idiag_sport) |
1da177e4 LT |
741 | goto next_listen; |
742 | ||
73c1f4a0 ACM |
743 | if (!(r->idiag_states & TCPF_LISTEN) || |
744 | r->id.idiag_dport || | |
1da177e4 LT |
745 | cb->args[3] > 0) |
746 | goto syn_recv; | |
747 | ||
dff2c035 | 748 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
5caea4ea | 749 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
750 | goto done; |
751 | } | |
752 | ||
753 | syn_recv: | |
73c1f4a0 | 754 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
755 | goto next_listen; |
756 | ||
73c1f4a0 | 757 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
5caea4ea | 758 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
759 | goto done; |
760 | } | |
761 | ||
762 | next_listen: | |
763 | cb->args[3] = 0; | |
764 | cb->args[4] = 0; | |
765 | ++num; | |
766 | } | |
5caea4ea | 767 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
768 | |
769 | s_num = 0; | |
770 | cb->args[3] = 0; | |
771 | cb->args[4] = 0; | |
772 | } | |
1da177e4 LT |
773 | skip_listen_ht: |
774 | cb->args[0] = 1; | |
775 | s_i = num = s_num = 0; | |
776 | } | |
777 | ||
73c1f4a0 | 778 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
d523a328 | 779 | goto unlock; |
1da177e4 | 780 | |
f373b53b | 781 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 782 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 783 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 784 | struct sock *sk; |
3ab5aee7 | 785 | struct hlist_nulls_node *node; |
1da177e4 | 786 | |
6be547a6 AK |
787 | num = 0; |
788 | ||
3ab5aee7 ED |
789 | if (hlist_nulls_empty(&head->chain) && |
790 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
791 | continue; |
792 | ||
1da177e4 LT |
793 | if (i > s_i) |
794 | s_num = 0; | |
795 | ||
7e3aab4a | 796 | spin_lock_bh(lock); |
3ab5aee7 | 797 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
798 | struct inet_sock *inet = inet_sk(sk); |
799 | ||
800 | if (num < s_num) | |
801 | goto next_normal; | |
73c1f4a0 | 802 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 803 | goto next_normal; |
c720c7e8 | 804 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 805 | r->id.idiag_sport) |
1da177e4 | 806 | goto next_normal; |
c720c7e8 | 807 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 808 | r->id.idiag_dport) |
1da177e4 | 809 | goto next_normal; |
dff2c035 | 810 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
7e3aab4a | 811 | spin_unlock_bh(lock); |
1da177e4 LT |
812 | goto done; |
813 | } | |
814 | next_normal: | |
815 | ++num; | |
816 | } | |
817 | ||
73c1f4a0 | 818 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
819 | struct inet_timewait_sock *tw; |
820 | ||
821 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 822 | &head->twchain) { |
1da177e4 LT |
823 | |
824 | if (num < s_num) | |
825 | goto next_dying; | |
7dbf0755 | 826 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 827 | r->id.idiag_sport) |
1da177e4 | 828 | goto next_dying; |
7dbf0755 | 829 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 830 | r->id.idiag_dport) |
1da177e4 | 831 | goto next_dying; |
c7d58aab | 832 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
7e3aab4a | 833 | spin_unlock_bh(lock); |
1da177e4 LT |
834 | goto done; |
835 | } | |
836 | next_dying: | |
837 | ++num; | |
838 | } | |
839 | } | |
7e3aab4a | 840 | spin_unlock_bh(lock); |
1da177e4 LT |
841 | } |
842 | ||
843 | done: | |
844 | cb->args[1] = i; | |
845 | cb->args[2] = num; | |
d523a328 HX |
846 | unlock: |
847 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
848 | return skb->len; |
849 | } | |
850 | ||
ead592ba | 851 | static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 852 | { |
ead592ba | 853 | int hdrlen = sizeof(struct inet_diag_req); |
1da177e4 | 854 | |
ead592ba TG |
855 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
856 | nlmsg_len(nlh) < hdrlen) | |
857 | return -EINVAL; | |
1da177e4 | 858 | |
b8f3ab42 | 859 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
860 | if (nlmsg_attrlen(nlh, hdrlen)) { |
861 | struct nlattr *attr; | |
1da177e4 | 862 | |
ead592ba TG |
863 | attr = nlmsg_find_attr(nlh, hdrlen, |
864 | INET_DIAG_REQ_BYTECODE); | |
865 | if (attr == NULL || | |
866 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
867 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
868 | return -EINVAL; | |
869 | } | |
1da177e4 | 870 | |
c702e804 TG |
871 | return netlink_dump_start(idiagnl, skb, nlh, |
872 | inet_diag_dump, NULL); | |
1da177e4 | 873 | } |
ead592ba TG |
874 | |
875 | return inet_diag_get_exact(skb, nlh); | |
1da177e4 LT |
876 | } |
877 | ||
0a9c7301 PM |
878 | static DEFINE_MUTEX(inet_diag_mutex); |
879 | ||
cd40b7d3 | 880 | static void inet_diag_rcv(struct sk_buff *skb) |
1da177e4 | 881 | { |
cd40b7d3 DL |
882 | mutex_lock(&inet_diag_mutex); |
883 | netlink_rcv_skb(skb, &inet_diag_rcv_msg); | |
884 | mutex_unlock(&inet_diag_mutex); | |
1da177e4 LT |
885 | } |
886 | ||
4f5736c4 ACM |
887 | int inet_diag_register(const struct inet_diag_handler *h) |
888 | { | |
889 | const __u16 type = h->idiag_type; | |
890 | int err = -EINVAL; | |
891 | ||
892 | if (type >= INET_DIAG_GETSOCK_MAX) | |
893 | goto out; | |
894 | ||
d523a328 | 895 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
896 | err = -EEXIST; |
897 | if (inet_diag_table[type] == NULL) { | |
898 | inet_diag_table[type] = h; | |
899 | err = 0; | |
900 | } | |
d523a328 | 901 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
902 | out: |
903 | return err; | |
904 | } | |
905 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
906 | ||
907 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
908 | { | |
909 | const __u16 type = h->idiag_type; | |
910 | ||
911 | if (type >= INET_DIAG_GETSOCK_MAX) | |
912 | return; | |
913 | ||
d523a328 | 914 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 915 | inet_diag_table[type] = NULL; |
d523a328 | 916 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
917 | } |
918 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
919 | ||
73c1f4a0 | 920 | static int __init inet_diag_init(void) |
1da177e4 | 921 | { |
4f5736c4 ACM |
922 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
923 | sizeof(struct inet_diag_handler *)); | |
924 | int err = -ENOMEM; | |
925 | ||
0da974f4 | 926 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
927 | if (!inet_diag_table) |
928 | goto out; | |
929 | ||
b4b51029 | 930 | idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0, |
d523a328 | 931 | inet_diag_rcv, NULL, THIS_MODULE); |
73c1f4a0 | 932 | if (idiagnl == NULL) |
4f5736c4 | 933 | goto out_free_table; |
17b085ea | 934 | err = 0; |
4f5736c4 ACM |
935 | out: |
936 | return err; | |
4f5736c4 ACM |
937 | out_free_table: |
938 | kfree(inet_diag_table); | |
939 | goto out; | |
1da177e4 LT |
940 | } |
941 | ||
73c1f4a0 | 942 | static void __exit inet_diag_exit(void) |
1da177e4 | 943 | { |
b7c6ba6e | 944 | netlink_kernel_release(idiagnl); |
4f5736c4 | 945 | kfree(inet_diag_table); |
1da177e4 LT |
946 | } |
947 | ||
73c1f4a0 ACM |
948 | module_init(inet_diag_init); |
949 | module_exit(inet_diag_exit); | |
1da177e4 | 950 | MODULE_LICENSE("GPL"); |
305e1e96 | 951 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG); |