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> | |
17 | #include <linux/cache.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/time.h> | |
20 | ||
21 | #include <net/icmp.h> | |
22 | #include <net/tcp.h> | |
23 | #include <net/ipv6.h> | |
24 | #include <net/inet_common.h> | |
505cbfc5 ACM |
25 | #include <net/inet_connection_sock.h> |
26 | #include <net/inet_hashtables.h> | |
27 | #include <net/inet_timewait_sock.h> | |
28 | #include <net/inet6_hashtables.h> | |
dc5fc579 | 29 | #include <net/netlink.h> |
1da177e4 LT |
30 | |
31 | #include <linux/inet.h> | |
32 | #include <linux/stddef.h> | |
33 | ||
a8c2190e | 34 | #include <linux/inet_diag.h> |
1da177e4 | 35 | |
4f5736c4 ACM |
36 | static const struct inet_diag_handler **inet_diag_table; |
37 | ||
73c1f4a0 | 38 | struct inet_diag_entry { |
9f855299 AV |
39 | __be32 *saddr; |
40 | __be32 *daddr; | |
1da177e4 LT |
41 | u16 sport; |
42 | u16 dport; | |
43 | u16 family; | |
44 | u16 userlocks; | |
45 | }; | |
46 | ||
73c1f4a0 | 47 | static struct sock *idiagnl; |
1da177e4 | 48 | |
73c1f4a0 | 49 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
7c99c909 | 50 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
1da177e4 | 51 | |
d523a328 HX |
52 | static DEFINE_MUTEX(inet_diag_table_mutex); |
53 | ||
54 | static const struct inet_diag_handler *inet_diag_lock_handler(int type) | |
55 | { | |
d523a328 HX |
56 | if (!inet_diag_table[type]) |
57 | request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK, | |
58 | NETLINK_INET_DIAG, type); | |
d523a328 HX |
59 | |
60 | mutex_lock(&inet_diag_table_mutex); | |
61 | if (!inet_diag_table[type]) | |
62 | return ERR_PTR(-ENOENT); | |
63 | ||
64 | return inet_diag_table[type]; | |
65 | } | |
66 | ||
67 | static inline void inet_diag_unlock_handler( | |
68 | const struct inet_diag_handler *handler) | |
69 | { | |
70 | mutex_unlock(&inet_diag_table_mutex); | |
71 | } | |
72 | ||
dff2c035 ACM |
73 | static int inet_csk_diag_fill(struct sock *sk, |
74 | struct sk_buff *skb, | |
75 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
76 | const struct nlmsghdr *unlh) | |
1da177e4 | 77 | { |
463c84b9 | 78 | const struct inet_sock *inet = inet_sk(sk); |
463c84b9 | 79 | const struct inet_connection_sock *icsk = inet_csk(sk); |
73c1f4a0 | 80 | struct inet_diag_msg *r; |
1da177e4 | 81 | struct nlmsghdr *nlh; |
4f5736c4 | 82 | void *info = NULL; |
73c1f4a0 | 83 | struct inet_diag_meminfo *minfo = NULL; |
27a884dc | 84 | unsigned char *b = skb_tail_pointer(skb); |
4f5736c4 ACM |
85 | const struct inet_diag_handler *handler; |
86 | ||
87 | handler = inet_diag_table[unlh->nlmsg_type]; | |
88 | BUG_ON(handler == NULL); | |
1da177e4 | 89 | |
540722ff | 90 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 | 91 | nlh->nlmsg_flags = nlmsg_flags; |
4f5736c4 | 92 | |
1da177e4 | 93 | r = NLMSG_DATA(nlh); |
c7d58aab ACM |
94 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
95 | ||
96 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) | |
97 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo)); | |
98 | ||
99 | if (ext & (1 << (INET_DIAG_INFO - 1))) | |
100 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, | |
101 | handler->idiag_info_size); | |
102 | ||
103 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { | |
104 | const size_t len = strlen(icsk->icsk_ca_ops->name); | |
105 | ||
106 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), | |
107 | icsk->icsk_ca_ops->name); | |
1da177e4 | 108 | } |
c7d58aab | 109 | |
73c1f4a0 ACM |
110 | r->idiag_family = sk->sk_family; |
111 | r->idiag_state = sk->sk_state; | |
112 | r->idiag_timer = 0; | |
113 | r->idiag_retrans = 0; | |
1da177e4 | 114 | |
73c1f4a0 ACM |
115 | r->id.idiag_if = sk->sk_bound_dev_if; |
116 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; | |
117 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); | |
1da177e4 | 118 | |
73c1f4a0 ACM |
119 | r->id.idiag_sport = inet->sport; |
120 | r->id.idiag_dport = inet->dport; | |
121 | r->id.idiag_src[0] = inet->rcv_saddr; | |
122 | r->id.idiag_dst[0] = inet->daddr; | |
1da177e4 | 123 | |
505cbfc5 | 124 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 125 | if (r->idiag_family == AF_INET6) { |
1da177e4 LT |
126 | struct ipv6_pinfo *np = inet6_sk(sk); |
127 | ||
73c1f4a0 | 128 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
1da177e4 | 129 | &np->rcv_saddr); |
73c1f4a0 | 130 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
1da177e4 LT |
131 | &np->daddr); |
132 | } | |
133 | #endif | |
134 | ||
172589cc | 135 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 136 | |
463c84b9 | 137 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
138 | r->idiag_timer = 1; |
139 | r->idiag_retrans = icsk->icsk_retransmits; | |
140 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 141 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
142 | r->idiag_timer = 4; |
143 | r->idiag_retrans = icsk->icsk_probes_out; | |
144 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 145 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
146 | r->idiag_timer = 2; |
147 | r->idiag_retrans = icsk->icsk_probes_out; | |
148 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 149 | } else { |
73c1f4a0 ACM |
150 | r->idiag_timer = 0; |
151 | r->idiag_expires = 0; | |
1da177e4 LT |
152 | } |
153 | #undef EXPIRES_IN_MS | |
540722ff | 154 | |
73c1f4a0 ACM |
155 | r->idiag_uid = sock_i_uid(sk); |
156 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
157 | |
158 | if (minfo) { | |
73c1f4a0 ACM |
159 | minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc); |
160 | minfo->idiag_wmem = sk->sk_wmem_queued; | |
161 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
162 | minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc); | |
1da177e4 LT |
163 | } |
164 | ||
4f5736c4 | 165 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 166 | |
6687e988 ACM |
167 | if (sk->sk_state < TCP_TIME_WAIT && |
168 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
169 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 170 | |
27a884dc | 171 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
172 | return skb->len; |
173 | ||
7c99c909 | 174 | rtattr_failure: |
1da177e4 | 175 | nlmsg_failure: |
dc5fc579 | 176 | nlmsg_trim(skb, b); |
26932566 | 177 | return -EMSGSIZE; |
1da177e4 LT |
178 | } |
179 | ||
c7d58aab ACM |
180 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
181 | struct sk_buff *skb, int ext, u32 pid, | |
182 | u32 seq, u16 nlmsg_flags, | |
183 | const struct nlmsghdr *unlh) | |
184 | { | |
185 | long tmo; | |
186 | struct inet_diag_msg *r; | |
27a884dc | 187 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
188 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
189 | unlh->nlmsg_type, sizeof(*r)); | |
190 | ||
191 | r = NLMSG_DATA(nlh); | |
192 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
193 | ||
194 | nlh->nlmsg_flags = nlmsg_flags; | |
195 | ||
196 | tmo = tw->tw_ttd - jiffies; | |
197 | if (tmo < 0) | |
198 | tmo = 0; | |
199 | ||
200 | r->idiag_family = tw->tw_family; | |
201 | r->idiag_state = tw->tw_state; | |
202 | r->idiag_timer = 0; | |
203 | r->idiag_retrans = 0; | |
204 | r->id.idiag_if = tw->tw_bound_dev_if; | |
205 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
206 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
207 | r->id.idiag_sport = tw->tw_sport; | |
208 | r->id.idiag_dport = tw->tw_dport; | |
209 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
210 | r->id.idiag_dst[0] = tw->tw_daddr; | |
211 | r->idiag_state = tw->tw_substate; | |
212 | r->idiag_timer = 3; | |
172589cc | 213 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
214 | r->idiag_rqueue = 0; |
215 | r->idiag_wqueue = 0; | |
216 | r->idiag_uid = 0; | |
217 | r->idiag_inode = 0; | |
218 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
219 | if (tw->tw_family == AF_INET6) { | |
220 | const struct inet6_timewait_sock *tw6 = | |
221 | inet6_twsk((struct sock *)tw); | |
222 | ||
223 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
224 | &tw6->tw_v6_rcv_saddr); | |
225 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, | |
226 | &tw6->tw_v6_daddr); | |
227 | } | |
228 | #endif | |
27a884dc | 229 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
230 | return skb->len; |
231 | nlmsg_failure: | |
dc5fc579 | 232 | nlmsg_trim(skb, previous_tail); |
26932566 | 233 | return -EMSGSIZE; |
c7d58aab ACM |
234 | } |
235 | ||
dff2c035 ACM |
236 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
237 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
238 | const struct nlmsghdr *unlh) | |
239 | { | |
240 | if (sk->sk_state == TCP_TIME_WAIT) | |
241 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
242 | skb, ext, pid, seq, nlmsg_flags, | |
243 | unlh); | |
244 | return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh); | |
245 | } | |
246 | ||
4e852c02 ACM |
247 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
248 | const struct nlmsghdr *nlh) | |
1da177e4 LT |
249 | { |
250 | int err; | |
251 | struct sock *sk; | |
73c1f4a0 | 252 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 253 | struct sk_buff *rep; |
4f5736c4 ACM |
254 | struct inet_hashinfo *hashinfo; |
255 | const struct inet_diag_handler *handler; | |
256 | ||
d523a328 | 257 | handler = inet_diag_lock_handler(nlh->nlmsg_type); |
8cf8e5a6 ACM |
258 | if (IS_ERR(handler)) { |
259 | err = PTR_ERR(handler); | |
260 | goto unlock; | |
261 | } | |
d523a328 | 262 | |
4f5736c4 | 263 | hashinfo = handler->idiag_hashinfo; |
d523a328 | 264 | err = -EINVAL; |
4f5736c4 | 265 | |
73c1f4a0 | 266 | if (req->idiag_family == AF_INET) { |
c67499c0 | 267 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
268 | req->id.idiag_dport, req->id.idiag_src[0], |
269 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 270 | } |
505cbfc5 | 271 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 272 | else if (req->idiag_family == AF_INET6) { |
d86e0dac | 273 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
274 | (struct in6_addr *)req->id.idiag_dst, |
275 | req->id.idiag_dport, | |
276 | (struct in6_addr *)req->id.idiag_src, | |
277 | req->id.idiag_sport, | |
278 | req->id.idiag_if); | |
1da177e4 LT |
279 | } |
280 | #endif | |
281 | else { | |
d523a328 | 282 | goto unlock; |
1da177e4 LT |
283 | } |
284 | ||
d523a328 | 285 | err = -ENOENT; |
1da177e4 | 286 | if (sk == NULL) |
d523a328 | 287 | goto unlock; |
1da177e4 LT |
288 | |
289 | err = -ESTALE; | |
73c1f4a0 ACM |
290 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
291 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
292 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
293 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
294 | goto out; |
295 | ||
296 | err = -ENOMEM; | |
73c1f4a0 ACM |
297 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
298 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
299 | handler->idiag_info_size + 64)), |
300 | GFP_KERNEL); | |
1da177e4 LT |
301 | if (!rep) |
302 | goto out; | |
303 | ||
26932566 PM |
304 | err = sk_diag_fill(sk, rep, req->idiag_ext, |
305 | NETLINK_CB(in_skb).pid, | |
306 | nlh->nlmsg_seq, 0, nlh); | |
307 | if (err < 0) { | |
308 | WARN_ON(err == -EMSGSIZE); | |
309 | kfree_skb(rep); | |
310 | goto out; | |
311 | } | |
73c1f4a0 ACM |
312 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
313 | MSG_DONTWAIT); | |
1da177e4 LT |
314 | if (err > 0) |
315 | err = 0; | |
316 | ||
317 | out: | |
318 | if (sk) { | |
319 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 320 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
321 | else |
322 | sock_put(sk); | |
323 | } | |
d523a328 HX |
324 | unlock: |
325 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
326 | return err; |
327 | } | |
328 | ||
9f855299 | 329 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
330 | { |
331 | int words = bits >> 5; | |
332 | ||
333 | bits &= 0x1f; | |
334 | ||
335 | if (words) { | |
336 | if (memcmp(a1, a2, words << 2)) | |
337 | return 0; | |
338 | } | |
339 | if (bits) { | |
9f855299 AV |
340 | __be32 w1, w2; |
341 | __be32 mask; | |
1da177e4 LT |
342 | |
343 | w1 = a1[words]; | |
344 | w2 = a2[words]; | |
345 | ||
346 | mask = htonl((0xffffffff) << (32 - bits)); | |
347 | ||
348 | if ((w1 ^ w2) & mask) | |
349 | return 0; | |
350 | } | |
351 | ||
352 | return 1; | |
353 | } | |
354 | ||
355 | ||
73c1f4a0 | 356 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 357 | const struct inet_diag_entry *entry) |
1da177e4 LT |
358 | { |
359 | while (len > 0) { | |
360 | int yes = 1; | |
73c1f4a0 | 361 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
362 | |
363 | switch (op->code) { | |
73c1f4a0 | 364 | case INET_DIAG_BC_NOP: |
1da177e4 | 365 | break; |
73c1f4a0 | 366 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
367 | yes = 0; |
368 | break; | |
73c1f4a0 | 369 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
370 | yes = entry->sport >= op[1].no; |
371 | break; | |
73c1f4a0 | 372 | case INET_DIAG_BC_S_LE: |
1da177e4 LT |
373 | yes = entry->dport <= op[1].no; |
374 | break; | |
73c1f4a0 | 375 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
376 | yes = entry->dport >= op[1].no; |
377 | break; | |
73c1f4a0 | 378 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
379 | yes = entry->dport <= op[1].no; |
380 | break; | |
73c1f4a0 | 381 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
382 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
383 | break; | |
73c1f4a0 | 384 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
385 | case INET_DIAG_BC_D_COND: { |
386 | struct inet_diag_hostcond *cond; | |
9f855299 | 387 | __be32 *addr; |
1da177e4 | 388 | |
a8c2190e | 389 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 390 | if (cond->port != -1 && |
73c1f4a0 | 391 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
392 | entry->sport : entry->dport)) { |
393 | yes = 0; | |
394 | break; | |
395 | } | |
4e852c02 | 396 | |
1da177e4 LT |
397 | if (cond->prefix_len == 0) |
398 | break; | |
399 | ||
73c1f4a0 | 400 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
401 | addr = entry->saddr; |
402 | else | |
403 | addr = entry->daddr; | |
404 | ||
4e852c02 ACM |
405 | if (bitstring_match(addr, cond->addr, |
406 | cond->prefix_len)) | |
1da177e4 LT |
407 | break; |
408 | if (entry->family == AF_INET6 && | |
409 | cond->family == AF_INET) { | |
410 | if (addr[0] == 0 && addr[1] == 0 && | |
411 | addr[2] == htonl(0xffff) && | |
a8c2190e | 412 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 413 | cond->prefix_len)) |
1da177e4 LT |
414 | break; |
415 | } | |
416 | yes = 0; | |
417 | break; | |
418 | } | |
419 | } | |
420 | ||
4e852c02 | 421 | if (yes) { |
1da177e4 LT |
422 | len -= op->yes; |
423 | bc += op->yes; | |
424 | } else { | |
425 | len -= op->no; | |
426 | bc += op->no; | |
427 | } | |
428 | } | |
429 | return (len == 0); | |
430 | } | |
431 | ||
432 | static int valid_cc(const void *bc, int len, int cc) | |
433 | { | |
434 | while (len >= 0) { | |
73c1f4a0 | 435 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
436 | |
437 | if (cc > len) | |
438 | return 0; | |
439 | if (cc == len) | |
440 | return 1; | |
441 | if (op->yes < 4) | |
442 | return 0; | |
443 | len -= op->yes; | |
444 | bc += op->yes; | |
445 | } | |
446 | return 0; | |
447 | } | |
448 | ||
73c1f4a0 | 449 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 LT |
450 | { |
451 | const unsigned char *bc = bytecode; | |
452 | int len = bytecode_len; | |
453 | ||
454 | while (len > 0) { | |
a8c2190e | 455 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc; |
1da177e4 LT |
456 | |
457 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
458 | switch (op->code) { | |
73c1f4a0 ACM |
459 | case INET_DIAG_BC_AUTO: |
460 | case INET_DIAG_BC_S_COND: | |
461 | case INET_DIAG_BC_D_COND: | |
462 | case INET_DIAG_BC_S_GE: | |
463 | case INET_DIAG_BC_S_LE: | |
464 | case INET_DIAG_BC_D_GE: | |
465 | case INET_DIAG_BC_D_LE: | |
a8c2190e | 466 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 | 467 | return -EINVAL; |
73c1f4a0 | 468 | case INET_DIAG_BC_JMP: |
a8c2190e | 469 | if (op->no < 4 || op->no > len + 4) |
1da177e4 LT |
470 | return -EINVAL; |
471 | if (op->no < len && | |
a8c2190e | 472 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
473 | return -EINVAL; |
474 | break; | |
73c1f4a0 | 475 | case INET_DIAG_BC_NOP: |
a8c2190e | 476 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 LT |
477 | return -EINVAL; |
478 | break; | |
479 | default: | |
480 | return -EINVAL; | |
481 | } | |
4e852c02 | 482 | bc += op->yes; |
1da177e4 LT |
483 | len -= op->yes; |
484 | } | |
485 | return len == 0 ? 0 : -EINVAL; | |
486 | } | |
487 | ||
dff2c035 ACM |
488 | static int inet_csk_diag_dump(struct sock *sk, |
489 | struct sk_buff *skb, | |
490 | struct netlink_callback *cb) | |
1da177e4 | 491 | { |
73c1f4a0 | 492 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 LT |
493 | |
494 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
73c1f4a0 | 495 | struct inet_diag_entry entry; |
1da177e4 LT |
496 | struct rtattr *bc = (struct rtattr *)(r + 1); |
497 | struct inet_sock *inet = inet_sk(sk); | |
498 | ||
499 | entry.family = sk->sk_family; | |
505cbfc5 | 500 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
501 | if (entry.family == AF_INET6) { |
502 | struct ipv6_pinfo *np = inet6_sk(sk); | |
503 | ||
504 | entry.saddr = np->rcv_saddr.s6_addr32; | |
505 | entry.daddr = np->daddr.s6_addr32; | |
506 | } else | |
507 | #endif | |
508 | { | |
509 | entry.saddr = &inet->rcv_saddr; | |
510 | entry.daddr = &inet->daddr; | |
511 | } | |
512 | entry.sport = inet->num; | |
513 | entry.dport = ntohs(inet->dport); | |
514 | entry.userlocks = sk->sk_userlocks; | |
515 | ||
73c1f4a0 | 516 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
1da177e4 LT |
517 | return 0; |
518 | } | |
519 | ||
dff2c035 ACM |
520 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
521 | NETLINK_CB(cb->skb).pid, | |
522 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
523 | } |
524 | ||
c7d58aab ACM |
525 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
526 | struct sk_buff *skb, | |
527 | struct netlink_callback *cb) | |
528 | { | |
529 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
530 | ||
531 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
532 | struct inet_diag_entry entry; | |
533 | struct rtattr *bc = (struct rtattr *)(r + 1); | |
534 | ||
535 | entry.family = tw->tw_family; | |
536 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
537 | if (tw->tw_family == AF_INET6) { | |
538 | struct inet6_timewait_sock *tw6 = | |
539 | inet6_twsk((struct sock *)tw); | |
540 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
541 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
542 | } else | |
543 | #endif | |
544 | { | |
545 | entry.saddr = &tw->tw_rcv_saddr; | |
546 | entry.daddr = &tw->tw_daddr; | |
547 | } | |
548 | entry.sport = tw->tw_num; | |
549 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 550 | entry.userlocks = 0; |
c7d58aab ACM |
551 | |
552 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) | |
553 | return 0; | |
554 | } | |
555 | ||
556 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
557 | NETLINK_CB(cb->skb).pid, | |
558 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
559 | } | |
560 | ||
73c1f4a0 | 561 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
562 | struct request_sock *req, u32 pid, u32 seq, |
563 | const struct nlmsghdr *unlh) | |
1da177e4 | 564 | { |
2e6599cb | 565 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 566 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 567 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 568 | struct inet_diag_msg *r; |
1da177e4 LT |
569 | struct nlmsghdr *nlh; |
570 | long tmo; | |
571 | ||
540722ff | 572 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
573 | nlh->nlmsg_flags = NLM_F_MULTI; |
574 | r = NLMSG_DATA(nlh); | |
575 | ||
73c1f4a0 ACM |
576 | r->idiag_family = sk->sk_family; |
577 | r->idiag_state = TCP_SYN_RECV; | |
578 | r->idiag_timer = 1; | |
579 | r->idiag_retrans = req->retrans; | |
1da177e4 | 580 | |
73c1f4a0 ACM |
581 | r->id.idiag_if = sk->sk_bound_dev_if; |
582 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
583 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
584 | |
585 | tmo = req->expires - jiffies; | |
586 | if (tmo < 0) | |
587 | tmo = 0; | |
588 | ||
73c1f4a0 ACM |
589 | r->id.idiag_sport = inet->sport; |
590 | r->id.idiag_dport = ireq->rmt_port; | |
591 | r->id.idiag_src[0] = ireq->loc_addr; | |
592 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
593 | r->idiag_expires = jiffies_to_msecs(tmo); | |
594 | r->idiag_rqueue = 0; | |
595 | r->idiag_wqueue = 0; | |
596 | r->idiag_uid = sock_i_uid(sk); | |
597 | r->idiag_inode = 0; | |
505cbfc5 | 598 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
599 | if (r->idiag_family == AF_INET6) { |
600 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
ca304b61 | 601 | &inet6_rsk(req)->loc_addr); |
73c1f4a0 | 602 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
ca304b61 | 603 | &inet6_rsk(req)->rmt_addr); |
1da177e4 LT |
604 | } |
605 | #endif | |
27a884dc | 606 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
607 | |
608 | return skb->len; | |
609 | ||
610 | nlmsg_failure: | |
dc5fc579 | 611 | nlmsg_trim(skb, b); |
1da177e4 LT |
612 | return -1; |
613 | } | |
614 | ||
73c1f4a0 | 615 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 616 | struct netlink_callback *cb) |
1da177e4 | 617 | { |
73c1f4a0 ACM |
618 | struct inet_diag_entry entry; |
619 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 620 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 621 | struct listen_sock *lopt; |
1da177e4 LT |
622 | struct rtattr *bc = NULL; |
623 | struct inet_sock *inet = inet_sk(sk); | |
624 | int j, s_j; | |
625 | int reqnum, s_reqnum; | |
626 | int err = 0; | |
627 | ||
628 | s_j = cb->args[3]; | |
629 | s_reqnum = cb->args[4]; | |
630 | ||
631 | if (s_j > 0) | |
632 | s_j--; | |
633 | ||
634 | entry.family = sk->sk_family; | |
635 | ||
463c84b9 | 636 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 637 | |
463c84b9 | 638 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
639 | if (!lopt || !lopt->qlen) |
640 | goto out; | |
641 | ||
642 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
643 | bc = (struct rtattr *)(r + 1); | |
644 | entry.sport = inet->num; | |
645 | entry.userlocks = sk->sk_userlocks; | |
646 | } | |
647 | ||
540722ff | 648 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 649 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
650 | |
651 | reqnum = 0; | |
652 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
653 | struct inet_request_sock *ireq = inet_rsk(req); |
654 | ||
1da177e4 LT |
655 | if (reqnum < s_reqnum) |
656 | continue; | |
73c1f4a0 ACM |
657 | if (r->id.idiag_dport != ireq->rmt_port && |
658 | r->id.idiag_dport) | |
1da177e4 LT |
659 | continue; |
660 | ||
661 | if (bc) { | |
662 | entry.saddr = | |
505cbfc5 | 663 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 664 | (entry.family == AF_INET6) ? |
ca304b61 | 665 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 666 | #endif |
2e6599cb | 667 | &ireq->loc_addr; |
4e852c02 | 668 | entry.daddr = |
505cbfc5 | 669 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 670 | (entry.family == AF_INET6) ? |
ca304b61 | 671 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 672 | #endif |
2e6599cb ACM |
673 | &ireq->rmt_addr; |
674 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 675 | |
73c1f4a0 | 676 | if (!inet_diag_bc_run(RTA_DATA(bc), |
1da177e4 LT |
677 | RTA_PAYLOAD(bc), &entry)) |
678 | continue; | |
679 | } | |
680 | ||
73c1f4a0 | 681 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 682 | NETLINK_CB(cb->skb).pid, |
540722ff | 683 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
684 | if (err < 0) { |
685 | cb->args[3] = j + 1; | |
686 | cb->args[4] = reqnum; | |
687 | goto out; | |
688 | } | |
689 | } | |
690 | ||
691 | s_reqnum = 0; | |
692 | } | |
693 | ||
694 | out: | |
463c84b9 | 695 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
696 | |
697 | return err; | |
698 | } | |
699 | ||
73c1f4a0 | 700 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
701 | { |
702 | int i, num; | |
703 | int s_i, s_num; | |
73c1f4a0 | 704 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 705 | const struct inet_diag_handler *handler; |
540722ff | 706 | struct inet_hashinfo *hashinfo; |
1da177e4 | 707 | |
d523a328 | 708 | handler = inet_diag_lock_handler(cb->nlh->nlmsg_type); |
8cf8e5a6 ACM |
709 | if (IS_ERR(handler)) |
710 | goto unlock; | |
d523a328 | 711 | |
4f5736c4 | 712 | hashinfo = handler->idiag_hashinfo; |
4e852c02 | 713 | |
1da177e4 LT |
714 | s_i = cb->args[1]; |
715 | s_num = num = cb->args[2]; | |
4f5736c4 | 716 | |
1da177e4 | 717 | if (cb->args[0] == 0) { |
73c1f4a0 | 718 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 719 | goto skip_listen_ht; |
540722ff ACM |
720 | |
721 | inet_listen_lock(hashinfo); | |
0f7ff927 | 722 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 LT |
723 | struct sock *sk; |
724 | struct hlist_node *node; | |
725 | ||
726 | num = 0; | |
540722ff | 727 | sk_for_each(sk, node, &hashinfo->listening_hash[i]) { |
1da177e4 LT |
728 | struct inet_sock *inet = inet_sk(sk); |
729 | ||
730 | if (num < s_num) { | |
731 | num++; | |
732 | continue; | |
733 | } | |
734 | ||
73c1f4a0 ACM |
735 | if (r->id.idiag_sport != inet->sport && |
736 | r->id.idiag_sport) | |
1da177e4 LT |
737 | goto next_listen; |
738 | ||
73c1f4a0 ACM |
739 | if (!(r->idiag_states & TCPF_LISTEN) || |
740 | r->id.idiag_dport || | |
1da177e4 LT |
741 | cb->args[3] > 0) |
742 | goto syn_recv; | |
743 | ||
dff2c035 | 744 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
540722ff | 745 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
746 | goto done; |
747 | } | |
748 | ||
749 | syn_recv: | |
73c1f4a0 | 750 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
751 | goto next_listen; |
752 | ||
73c1f4a0 | 753 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
540722ff | 754 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
755 | goto done; |
756 | } | |
757 | ||
758 | next_listen: | |
759 | cb->args[3] = 0; | |
760 | cb->args[4] = 0; | |
761 | ++num; | |
762 | } | |
763 | ||
764 | s_num = 0; | |
765 | cb->args[3] = 0; | |
766 | cb->args[4] = 0; | |
767 | } | |
540722ff | 768 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
769 | skip_listen_ht: |
770 | cb->args[0] = 1; | |
771 | s_i = num = s_num = 0; | |
772 | } | |
773 | ||
73c1f4a0 | 774 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
d523a328 | 775 | goto unlock; |
1da177e4 | 776 | |
540722ff ACM |
777 | for (i = s_i; i < hashinfo->ehash_size; i++) { |
778 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; | |
230140cf | 779 | rwlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 LT |
780 | struct sock *sk; |
781 | struct hlist_node *node; | |
782 | ||
6be547a6 AK |
783 | num = 0; |
784 | ||
785 | if (hlist_empty(&head->chain) && hlist_empty(&head->twchain)) | |
786 | continue; | |
787 | ||
1da177e4 LT |
788 | if (i > s_i) |
789 | s_num = 0; | |
790 | ||
230140cf | 791 | read_lock_bh(lock); |
1da177e4 LT |
792 | sk_for_each(sk, node, &head->chain) { |
793 | struct inet_sock *inet = inet_sk(sk); | |
794 | ||
795 | if (num < s_num) | |
796 | goto next_normal; | |
73c1f4a0 | 797 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 798 | goto next_normal; |
73c1f4a0 ACM |
799 | if (r->id.idiag_sport != inet->sport && |
800 | r->id.idiag_sport) | |
1da177e4 | 801 | goto next_normal; |
4e852c02 ACM |
802 | if (r->id.idiag_dport != inet->dport && |
803 | r->id.idiag_dport) | |
1da177e4 | 804 | goto next_normal; |
dff2c035 | 805 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
230140cf | 806 | read_unlock_bh(lock); |
1da177e4 LT |
807 | goto done; |
808 | } | |
809 | next_normal: | |
810 | ++num; | |
811 | } | |
812 | ||
73c1f4a0 | 813 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
814 | struct inet_timewait_sock *tw; |
815 | ||
816 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 817 | &head->twchain) { |
1da177e4 LT |
818 | |
819 | if (num < s_num) | |
820 | goto next_dying; | |
7dbf0755 | 821 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 822 | r->id.idiag_sport) |
1da177e4 | 823 | goto next_dying; |
7dbf0755 | 824 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 825 | r->id.idiag_dport) |
1da177e4 | 826 | goto next_dying; |
c7d58aab | 827 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
230140cf | 828 | read_unlock_bh(lock); |
1da177e4 LT |
829 | goto done; |
830 | } | |
831 | next_dying: | |
832 | ++num; | |
833 | } | |
834 | } | |
230140cf | 835 | read_unlock_bh(lock); |
1da177e4 LT |
836 | } |
837 | ||
838 | done: | |
839 | cb->args[1] = i; | |
840 | cb->args[2] = num; | |
d523a328 HX |
841 | unlock: |
842 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
843 | return skb->len; |
844 | } | |
845 | ||
ead592ba | 846 | static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 847 | { |
ead592ba | 848 | int hdrlen = sizeof(struct inet_diag_req); |
1da177e4 | 849 | |
ead592ba TG |
850 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
851 | nlmsg_len(nlh) < hdrlen) | |
852 | return -EINVAL; | |
1da177e4 | 853 | |
ead592ba | 854 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
855 | if (nlmsg_attrlen(nlh, hdrlen)) { |
856 | struct nlattr *attr; | |
1da177e4 | 857 | |
ead592ba TG |
858 | attr = nlmsg_find_attr(nlh, hdrlen, |
859 | INET_DIAG_REQ_BYTECODE); | |
860 | if (attr == NULL || | |
861 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
862 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
863 | return -EINVAL; | |
864 | } | |
1da177e4 | 865 | |
c702e804 TG |
866 | return netlink_dump_start(idiagnl, skb, nlh, |
867 | inet_diag_dump, NULL); | |
1da177e4 | 868 | } |
ead592ba TG |
869 | |
870 | return inet_diag_get_exact(skb, nlh); | |
1da177e4 LT |
871 | } |
872 | ||
0a9c7301 PM |
873 | static DEFINE_MUTEX(inet_diag_mutex); |
874 | ||
cd40b7d3 | 875 | static void inet_diag_rcv(struct sk_buff *skb) |
1da177e4 | 876 | { |
cd40b7d3 DL |
877 | mutex_lock(&inet_diag_mutex); |
878 | netlink_rcv_skb(skb, &inet_diag_rcv_msg); | |
879 | mutex_unlock(&inet_diag_mutex); | |
1da177e4 LT |
880 | } |
881 | ||
4f5736c4 ACM |
882 | int inet_diag_register(const struct inet_diag_handler *h) |
883 | { | |
884 | const __u16 type = h->idiag_type; | |
885 | int err = -EINVAL; | |
886 | ||
887 | if (type >= INET_DIAG_GETSOCK_MAX) | |
888 | goto out; | |
889 | ||
d523a328 | 890 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
891 | err = -EEXIST; |
892 | if (inet_diag_table[type] == NULL) { | |
893 | inet_diag_table[type] = h; | |
894 | err = 0; | |
895 | } | |
d523a328 | 896 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
897 | out: |
898 | return err; | |
899 | } | |
900 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
901 | ||
902 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
903 | { | |
904 | const __u16 type = h->idiag_type; | |
905 | ||
906 | if (type >= INET_DIAG_GETSOCK_MAX) | |
907 | return; | |
908 | ||
d523a328 | 909 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 910 | inet_diag_table[type] = NULL; |
d523a328 | 911 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
912 | } |
913 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
914 | ||
73c1f4a0 | 915 | static int __init inet_diag_init(void) |
1da177e4 | 916 | { |
4f5736c4 ACM |
917 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
918 | sizeof(struct inet_diag_handler *)); | |
919 | int err = -ENOMEM; | |
920 | ||
0da974f4 | 921 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
922 | if (!inet_diag_table) |
923 | goto out; | |
924 | ||
b4b51029 | 925 | idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0, |
d523a328 | 926 | inet_diag_rcv, NULL, THIS_MODULE); |
73c1f4a0 | 927 | if (idiagnl == NULL) |
4f5736c4 | 928 | goto out_free_table; |
17b085ea | 929 | err = 0; |
4f5736c4 ACM |
930 | out: |
931 | return err; | |
4f5736c4 ACM |
932 | out_free_table: |
933 | kfree(inet_diag_table); | |
934 | goto out; | |
1da177e4 LT |
935 | } |
936 | ||
73c1f4a0 | 937 | static void __exit inet_diag_exit(void) |
1da177e4 | 938 | { |
b7c6ba6e | 939 | netlink_kernel_release(idiagnl); |
4f5736c4 | 940 | kfree(inet_diag_table); |
1da177e4 LT |
941 | } |
942 | ||
73c1f4a0 ACM |
943 | module_init(inet_diag_init); |
944 | module_exit(inet_diag_exit); | |
1da177e4 | 945 | MODULE_LICENSE("GPL"); |
305e1e96 | 946 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG); |