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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
73c1f4a0 | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 3 | * |
1da177e4 LT |
4 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
172589cc | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/random.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/cache.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/time.h> | |
21 | ||
22 | #include <net/icmp.h> | |
23 | #include <net/tcp.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <net/inet_common.h> | |
505cbfc5 ACM |
26 | #include <net/inet_connection_sock.h> |
27 | #include <net/inet_hashtables.h> | |
28 | #include <net/inet_timewait_sock.h> | |
29 | #include <net/inet6_hashtables.h> | |
dc5fc579 | 30 | #include <net/netlink.h> |
1da177e4 LT |
31 | |
32 | #include <linux/inet.h> | |
33 | #include <linux/stddef.h> | |
34 | ||
a8c2190e | 35 | #include <linux/inet_diag.h> |
d366477a | 36 | #include <linux/sock_diag.h> |
1da177e4 | 37 | |
4f5736c4 ACM |
38 | static const struct inet_diag_handler **inet_diag_table; |
39 | ||
73c1f4a0 | 40 | struct inet_diag_entry { |
9f855299 AV |
41 | __be32 *saddr; |
42 | __be32 *daddr; | |
1da177e4 LT |
43 | u16 sport; |
44 | u16 dport; | |
45 | u16 family; | |
46 | u16 userlocks; | |
47 | }; | |
48 | ||
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 | ||
f13c95f0 | 54 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 55 | { |
f13c95f0 | 56 | if (!inet_diag_table[proto]) |
d523a328 | 57 | request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK, |
f13c95f0 | 58 | NETLINK_SOCK_DIAG, proto); |
d523a328 HX |
59 | |
60 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 61 | if (!inet_diag_table[proto]) |
d523a328 HX |
62 | return ERR_PTR(-ENOENT); |
63 | ||
f13c95f0 | 64 | return inet_diag_table[proto]; |
d523a328 HX |
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 | 73 | static int inet_csk_diag_fill(struct sock *sk, |
a029fe26 PE |
74 | struct sk_buff *skb, struct inet_diag_req *req, |
75 | u32 pid, u32 seq, u16 nlmsg_flags, | |
dff2c035 | 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 | 85 | const struct inet_diag_handler *handler; |
a029fe26 | 86 | int ext = req->idiag_ext; |
4f5736c4 | 87 | |
a029fe26 | 88 | handler = inet_diag_table[req->sdiag_protocol]; |
4f5736c4 | 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))) | |
7b35eadd | 101 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, sizeof(struct tcp_info)); |
c7d58aab ACM |
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 | |
c720c7e8 ED |
119 | r->id.idiag_sport = inet->inet_sport; |
120 | r->id.idiag_dport = inet->inet_dport; | |
121 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
122 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 123 | |
717b6d83 MŻ |
124 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
125 | * hence this needs to be included regardless of socket family. | |
126 | */ | |
127 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
128 | RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos); | |
129 | ||
505cbfc5 | 130 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 131 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 132 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 133 | |
4e3fd7a0 AD |
134 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
135 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
06236ac3 MŻ |
136 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
137 | RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass); | |
1da177e4 LT |
138 | } |
139 | #endif | |
140 | ||
172589cc | 141 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 142 | |
463c84b9 | 143 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
144 | r->idiag_timer = 1; |
145 | r->idiag_retrans = icsk->icsk_retransmits; | |
146 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 147 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
148 | r->idiag_timer = 4; |
149 | r->idiag_retrans = icsk->icsk_probes_out; | |
150 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 151 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
152 | r->idiag_timer = 2; |
153 | r->idiag_retrans = icsk->icsk_probes_out; | |
154 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 155 | } else { |
73c1f4a0 ACM |
156 | r->idiag_timer = 0; |
157 | r->idiag_expires = 0; | |
1da177e4 LT |
158 | } |
159 | #undef EXPIRES_IN_MS | |
540722ff | 160 | |
73c1f4a0 ACM |
161 | r->idiag_uid = sock_i_uid(sk); |
162 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
163 | |
164 | if (minfo) { | |
31e6d363 | 165 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); |
73c1f4a0 ACM |
166 | minfo->idiag_wmem = sk->sk_wmem_queued; |
167 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
31e6d363 | 168 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); |
1da177e4 LT |
169 | } |
170 | ||
4f5736c4 | 171 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 172 | |
6687e988 ACM |
173 | if (sk->sk_state < TCP_TIME_WAIT && |
174 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
175 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 176 | |
27a884dc | 177 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
178 | return skb->len; |
179 | ||
7c99c909 | 180 | rtattr_failure: |
1da177e4 | 181 | nlmsg_failure: |
dc5fc579 | 182 | nlmsg_trim(skb, b); |
26932566 | 183 | return -EMSGSIZE; |
1da177e4 LT |
184 | } |
185 | ||
c7d58aab | 186 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
a029fe26 PE |
187 | struct sk_buff *skb, struct inet_diag_req *req, |
188 | u32 pid, u32 seq, u16 nlmsg_flags, | |
c7d58aab ACM |
189 | const struct nlmsghdr *unlh) |
190 | { | |
191 | long tmo; | |
192 | struct inet_diag_msg *r; | |
27a884dc | 193 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
194 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
195 | unlh->nlmsg_type, sizeof(*r)); | |
196 | ||
197 | r = NLMSG_DATA(nlh); | |
198 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
199 | ||
200 | nlh->nlmsg_flags = nlmsg_flags; | |
201 | ||
202 | tmo = tw->tw_ttd - jiffies; | |
203 | if (tmo < 0) | |
204 | tmo = 0; | |
205 | ||
206 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
207 | r->idiag_retrans = 0; |
208 | r->id.idiag_if = tw->tw_bound_dev_if; | |
209 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
210 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
211 | r->id.idiag_sport = tw->tw_sport; | |
212 | r->id.idiag_dport = tw->tw_dport; | |
213 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
214 | r->id.idiag_dst[0] = tw->tw_daddr; | |
215 | r->idiag_state = tw->tw_substate; | |
216 | r->idiag_timer = 3; | |
172589cc | 217 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
218 | r->idiag_rqueue = 0; |
219 | r->idiag_wqueue = 0; | |
220 | r->idiag_uid = 0; | |
221 | r->idiag_inode = 0; | |
222 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
223 | if (tw->tw_family == AF_INET6) { | |
224 | const struct inet6_timewait_sock *tw6 = | |
225 | inet6_twsk((struct sock *)tw); | |
226 | ||
4e3fd7a0 AD |
227 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
228 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
229 | } |
230 | #endif | |
27a884dc | 231 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
232 | return skb->len; |
233 | nlmsg_failure: | |
dc5fc579 | 234 | nlmsg_trim(skb, previous_tail); |
26932566 | 235 | return -EMSGSIZE; |
c7d58aab ACM |
236 | } |
237 | ||
dff2c035 | 238 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
a029fe26 | 239 | struct inet_diag_req *r, u32 pid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
240 | const struct nlmsghdr *unlh) |
241 | { | |
242 | if (sk->sk_state == TCP_TIME_WAIT) | |
243 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
a029fe26 | 244 | skb, r, pid, seq, nlmsg_flags, |
dff2c035 | 245 | unlh); |
a029fe26 | 246 | return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh); |
dff2c035 ACM |
247 | } |
248 | ||
4e852c02 | 249 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
fe50ce28 PE |
250 | const struct nlmsghdr *nlh, |
251 | struct inet_diag_req *req) | |
1da177e4 LT |
252 | { |
253 | int err; | |
254 | struct sock *sk; | |
1da177e4 | 255 | struct sk_buff *rep; |
4f5736c4 ACM |
256 | struct inet_hashinfo *hashinfo; |
257 | const struct inet_diag_handler *handler; | |
258 | ||
fe50ce28 | 259 | handler = inet_diag_lock_handler(req->sdiag_protocol); |
8cf8e5a6 ACM |
260 | if (IS_ERR(handler)) { |
261 | err = PTR_ERR(handler); | |
262 | goto unlock; | |
263 | } | |
d523a328 | 264 | |
4f5736c4 | 265 | hashinfo = handler->idiag_hashinfo; |
d523a328 | 266 | err = -EINVAL; |
4f5736c4 | 267 | |
fe50ce28 | 268 | if (req->sdiag_family == AF_INET) { |
c67499c0 | 269 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
270 | req->id.idiag_dport, req->id.idiag_src[0], |
271 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 272 | } |
505cbfc5 | 273 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
fe50ce28 | 274 | else if (req->sdiag_family == AF_INET6) { |
d86e0dac | 275 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
276 | (struct in6_addr *)req->id.idiag_dst, |
277 | req->id.idiag_dport, | |
278 | (struct in6_addr *)req->id.idiag_src, | |
279 | req->id.idiag_sport, | |
280 | req->id.idiag_if); | |
1da177e4 LT |
281 | } |
282 | #endif | |
283 | else { | |
d523a328 | 284 | goto unlock; |
1da177e4 LT |
285 | } |
286 | ||
d523a328 | 287 | err = -ENOENT; |
1da177e4 | 288 | if (sk == NULL) |
d523a328 | 289 | goto unlock; |
1da177e4 LT |
290 | |
291 | err = -ESTALE; | |
73c1f4a0 ACM |
292 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
293 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
294 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
295 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
296 | goto out; |
297 | ||
298 | err = -ENOMEM; | |
73c1f4a0 ACM |
299 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
300 | sizeof(struct inet_diag_meminfo) + | |
7b35eadd | 301 | sizeof(struct tcp_info) + 64)), |
4f5736c4 | 302 | GFP_KERNEL); |
1da177e4 LT |
303 | if (!rep) |
304 | goto out; | |
305 | ||
a029fe26 | 306 | err = sk_diag_fill(sk, rep, req, |
26932566 PM |
307 | NETLINK_CB(in_skb).pid, |
308 | nlh->nlmsg_seq, 0, nlh); | |
309 | if (err < 0) { | |
310 | WARN_ON(err == -EMSGSIZE); | |
311 | kfree_skb(rep); | |
312 | goto out; | |
313 | } | |
8ef874bf | 314 | err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid, |
73c1f4a0 | 315 | MSG_DONTWAIT); |
1da177e4 LT |
316 | if (err > 0) |
317 | err = 0; | |
318 | ||
319 | out: | |
320 | if (sk) { | |
321 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 322 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
323 | else |
324 | sock_put(sk); | |
325 | } | |
d523a328 HX |
326 | unlock: |
327 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
328 | return err; |
329 | } | |
330 | ||
9f855299 | 331 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
332 | { |
333 | int words = bits >> 5; | |
334 | ||
335 | bits &= 0x1f; | |
336 | ||
337 | if (words) { | |
338 | if (memcmp(a1, a2, words << 2)) | |
339 | return 0; | |
340 | } | |
341 | if (bits) { | |
9f855299 AV |
342 | __be32 w1, w2; |
343 | __be32 mask; | |
1da177e4 LT |
344 | |
345 | w1 = a1[words]; | |
346 | w2 = a2[words]; | |
347 | ||
348 | mask = htonl((0xffffffff) << (32 - bits)); | |
349 | ||
350 | if ((w1 ^ w2) & mask) | |
351 | return 0; | |
352 | } | |
353 | ||
354 | return 1; | |
355 | } | |
356 | ||
357 | ||
73c1f4a0 | 358 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 359 | const struct inet_diag_entry *entry) |
1da177e4 LT |
360 | { |
361 | while (len > 0) { | |
362 | int yes = 1; | |
73c1f4a0 | 363 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
364 | |
365 | switch (op->code) { | |
73c1f4a0 | 366 | case INET_DIAG_BC_NOP: |
1da177e4 | 367 | break; |
73c1f4a0 | 368 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
369 | yes = 0; |
370 | break; | |
73c1f4a0 | 371 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
372 | yes = entry->sport >= op[1].no; |
373 | break; | |
73c1f4a0 | 374 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 375 | yes = entry->sport <= op[1].no; |
1da177e4 | 376 | break; |
73c1f4a0 | 377 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
378 | yes = entry->dport >= op[1].no; |
379 | break; | |
73c1f4a0 | 380 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
381 | yes = entry->dport <= op[1].no; |
382 | break; | |
73c1f4a0 | 383 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
384 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
385 | break; | |
73c1f4a0 | 386 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
387 | case INET_DIAG_BC_D_COND: { |
388 | struct inet_diag_hostcond *cond; | |
9f855299 | 389 | __be32 *addr; |
1da177e4 | 390 | |
a8c2190e | 391 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 392 | if (cond->port != -1 && |
73c1f4a0 | 393 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
394 | entry->sport : entry->dport)) { |
395 | yes = 0; | |
396 | break; | |
397 | } | |
4e852c02 | 398 | |
1da177e4 LT |
399 | if (cond->prefix_len == 0) |
400 | break; | |
401 | ||
73c1f4a0 | 402 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
403 | addr = entry->saddr; |
404 | else | |
405 | addr = entry->daddr; | |
406 | ||
4e852c02 ACM |
407 | if (bitstring_match(addr, cond->addr, |
408 | cond->prefix_len)) | |
1da177e4 LT |
409 | break; |
410 | if (entry->family == AF_INET6 && | |
411 | cond->family == AF_INET) { | |
412 | if (addr[0] == 0 && addr[1] == 0 && | |
413 | addr[2] == htonl(0xffff) && | |
a8c2190e | 414 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 415 | cond->prefix_len)) |
1da177e4 LT |
416 | break; |
417 | } | |
418 | yes = 0; | |
419 | break; | |
420 | } | |
421 | } | |
422 | ||
4e852c02 | 423 | if (yes) { |
1da177e4 LT |
424 | len -= op->yes; |
425 | bc += op->yes; | |
426 | } else { | |
427 | len -= op->no; | |
428 | bc += op->no; | |
429 | } | |
430 | } | |
a02cec21 | 431 | return len == 0; |
1da177e4 LT |
432 | } |
433 | ||
434 | static int valid_cc(const void *bc, int len, int cc) | |
435 | { | |
436 | while (len >= 0) { | |
73c1f4a0 | 437 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
438 | |
439 | if (cc > len) | |
440 | return 0; | |
441 | if (cc == len) | |
442 | return 1; | |
eeb14972 | 443 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
444 | return 0; |
445 | len -= op->yes; | |
446 | bc += op->yes; | |
447 | } | |
448 | return 0; | |
449 | } | |
450 | ||
73c1f4a0 | 451 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 452 | { |
eeb14972 | 453 | const void *bc = bytecode; |
1da177e4 LT |
454 | int len = bytecode_len; |
455 | ||
456 | while (len > 0) { | |
eeb14972 | 457 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
458 | |
459 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
460 | switch (op->code) { | |
73c1f4a0 ACM |
461 | case INET_DIAG_BC_AUTO: |
462 | case INET_DIAG_BC_S_COND: | |
463 | case INET_DIAG_BC_D_COND: | |
464 | case INET_DIAG_BC_S_GE: | |
465 | case INET_DIAG_BC_S_LE: | |
466 | case INET_DIAG_BC_D_GE: | |
467 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 468 | case INET_DIAG_BC_JMP: |
eeb14972 | 469 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
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: |
1da177e4 LT |
476 | break; |
477 | default: | |
478 | return -EINVAL; | |
479 | } | |
eeb14972 ED |
480 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
481 | return -EINVAL; | |
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, | |
37f352b5 | 490 | struct netlink_callback *cb, |
25c4cd2b | 491 | struct inet_diag_req *r, |
37f352b5 | 492 | const struct nlattr *bc) |
1da177e4 | 493 | { |
37f352b5 | 494 | if (bc != NULL) { |
73c1f4a0 | 495 | struct inet_diag_entry entry; |
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 | ||
a029fe26 | 519 | return inet_csk_diag_fill(sk, skb, r, |
dff2c035 ACM |
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, | |
37f352b5 | 526 | struct netlink_callback *cb, |
25c4cd2b | 527 | struct inet_diag_req *r, |
37f352b5 | 528 | const struct nlattr *bc) |
c7d58aab | 529 | { |
37f352b5 | 530 | if (bc != NULL) { |
c7d58aab | 531 | struct inet_diag_entry entry; |
c7d58aab ACM |
532 | |
533 | entry.family = tw->tw_family; | |
534 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
535 | if (tw->tw_family == AF_INET6) { | |
536 | struct inet6_timewait_sock *tw6 = | |
537 | inet6_twsk((struct sock *)tw); | |
538 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
539 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
540 | } else | |
541 | #endif | |
542 | { | |
543 | entry.saddr = &tw->tw_rcv_saddr; | |
544 | entry.daddr = &tw->tw_daddr; | |
545 | } | |
546 | entry.sport = tw->tw_num; | |
547 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 548 | entry.userlocks = 0; |
c7d58aab | 549 | |
22e76c84 | 550 | if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry)) |
c7d58aab ACM |
551 | return 0; |
552 | } | |
553 | ||
a029fe26 | 554 | return inet_twsk_diag_fill(tw, skb, r, |
c7d58aab ACM |
555 | NETLINK_CB(cb->skb).pid, |
556 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
557 | } | |
558 | ||
73c1f4a0 | 559 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
560 | struct request_sock *req, u32 pid, u32 seq, |
561 | const struct nlmsghdr *unlh) | |
1da177e4 | 562 | { |
2e6599cb | 563 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 564 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 565 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 566 | struct inet_diag_msg *r; |
1da177e4 LT |
567 | struct nlmsghdr *nlh; |
568 | long tmo; | |
569 | ||
540722ff | 570 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
571 | nlh->nlmsg_flags = NLM_F_MULTI; |
572 | r = NLMSG_DATA(nlh); | |
573 | ||
73c1f4a0 ACM |
574 | r->idiag_family = sk->sk_family; |
575 | r->idiag_state = TCP_SYN_RECV; | |
576 | r->idiag_timer = 1; | |
577 | r->idiag_retrans = req->retrans; | |
1da177e4 | 578 | |
73c1f4a0 ACM |
579 | r->id.idiag_if = sk->sk_bound_dev_if; |
580 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
581 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
582 | |
583 | tmo = req->expires - jiffies; | |
584 | if (tmo < 0) | |
585 | tmo = 0; | |
586 | ||
c720c7e8 | 587 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
588 | r->id.idiag_dport = ireq->rmt_port; |
589 | r->id.idiag_src[0] = ireq->loc_addr; | |
590 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
591 | r->idiag_expires = jiffies_to_msecs(tmo); | |
592 | r->idiag_rqueue = 0; | |
593 | r->idiag_wqueue = 0; | |
594 | r->idiag_uid = sock_i_uid(sk); | |
595 | r->idiag_inode = 0; | |
505cbfc5 | 596 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 597 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
598 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
599 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
600 | } |
601 | #endif | |
27a884dc | 602 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
603 | |
604 | return skb->len; | |
605 | ||
606 | nlmsg_failure: | |
dc5fc579 | 607 | nlmsg_trim(skb, b); |
1da177e4 LT |
608 | return -1; |
609 | } | |
610 | ||
73c1f4a0 | 611 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 612 | struct netlink_callback *cb, |
25c4cd2b | 613 | struct inet_diag_req *r, |
37f352b5 | 614 | const struct nlattr *bc) |
1da177e4 | 615 | { |
73c1f4a0 | 616 | struct inet_diag_entry entry; |
463c84b9 | 617 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 618 | struct listen_sock *lopt; |
1da177e4 LT |
619 | struct inet_sock *inet = inet_sk(sk); |
620 | int j, s_j; | |
621 | int reqnum, s_reqnum; | |
622 | int err = 0; | |
623 | ||
624 | s_j = cb->args[3]; | |
625 | s_reqnum = cb->args[4]; | |
626 | ||
627 | if (s_j > 0) | |
628 | s_j--; | |
629 | ||
630 | entry.family = sk->sk_family; | |
631 | ||
463c84b9 | 632 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 633 | |
463c84b9 | 634 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
635 | if (!lopt || !lopt->qlen) |
636 | goto out; | |
637 | ||
37f352b5 | 638 | if (bc != NULL) { |
c720c7e8 | 639 | entry.sport = inet->inet_num; |
1da177e4 LT |
640 | entry.userlocks = sk->sk_userlocks; |
641 | } | |
642 | ||
540722ff | 643 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 644 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
645 | |
646 | reqnum = 0; | |
647 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
648 | struct inet_request_sock *ireq = inet_rsk(req); |
649 | ||
1da177e4 LT |
650 | if (reqnum < s_reqnum) |
651 | continue; | |
73c1f4a0 ACM |
652 | if (r->id.idiag_dport != ireq->rmt_port && |
653 | r->id.idiag_dport) | |
1da177e4 LT |
654 | continue; |
655 | ||
656 | if (bc) { | |
657 | entry.saddr = | |
505cbfc5 | 658 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 659 | (entry.family == AF_INET6) ? |
ca304b61 | 660 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 661 | #endif |
2e6599cb | 662 | &ireq->loc_addr; |
4e852c02 | 663 | entry.daddr = |
505cbfc5 | 664 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 665 | (entry.family == AF_INET6) ? |
ca304b61 | 666 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 667 | #endif |
2e6599cb ACM |
668 | &ireq->rmt_addr; |
669 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 670 | |
22e76c84 NE |
671 | if (!inet_diag_bc_run(nla_data(bc), |
672 | nla_len(bc), &entry)) | |
1da177e4 LT |
673 | continue; |
674 | } | |
675 | ||
73c1f4a0 | 676 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 677 | NETLINK_CB(cb->skb).pid, |
540722ff | 678 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
679 | if (err < 0) { |
680 | cb->args[3] = j + 1; | |
681 | cb->args[4] = reqnum; | |
682 | goto out; | |
683 | } | |
684 | } | |
685 | ||
686 | s_reqnum = 0; | |
687 | } | |
688 | ||
689 | out: | |
463c84b9 | 690 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
691 | |
692 | return err; | |
693 | } | |
694 | ||
25c4cd2b PE |
695 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, |
696 | struct inet_diag_req *r, struct nlattr *bc) | |
1da177e4 LT |
697 | { |
698 | int i, num; | |
699 | int s_i, s_num; | |
4f5736c4 | 700 | const struct inet_diag_handler *handler; |
540722ff | 701 | struct inet_hashinfo *hashinfo; |
37f352b5 | 702 | |
25c4cd2b | 703 | handler = inet_diag_lock_handler(r->sdiag_protocol); |
8cf8e5a6 ACM |
704 | if (IS_ERR(handler)) |
705 | goto unlock; | |
d523a328 | 706 | |
4f5736c4 | 707 | hashinfo = handler->idiag_hashinfo; |
4e852c02 | 708 | |
1da177e4 LT |
709 | s_i = cb->args[1]; |
710 | s_num = num = cb->args[2]; | |
4f5736c4 | 711 | |
1da177e4 | 712 | if (cb->args[0] == 0) { |
73c1f4a0 | 713 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 714 | goto skip_listen_ht; |
540722ff | 715 | |
0f7ff927 | 716 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 717 | struct sock *sk; |
c25eb3bf | 718 | struct hlist_nulls_node *node; |
5caea4ea | 719 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
720 | |
721 | num = 0; | |
5caea4ea ED |
722 | ilb = &hashinfo->listening_hash[i]; |
723 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 724 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
725 | struct inet_sock *inet = inet_sk(sk); |
726 | ||
727 | if (num < s_num) { | |
728 | num++; | |
729 | continue; | |
730 | } | |
731 | ||
d23deaa0 PE |
732 | if (r->sdiag_family != AF_UNSPEC && |
733 | sk->sk_family != r->sdiag_family) | |
734 | goto next_listen; | |
735 | ||
c720c7e8 | 736 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 737 | r->id.idiag_sport) |
1da177e4 LT |
738 | goto next_listen; |
739 | ||
73c1f4a0 ACM |
740 | if (!(r->idiag_states & TCPF_LISTEN) || |
741 | r->id.idiag_dport || | |
1da177e4 LT |
742 | cb->args[3] > 0) |
743 | goto syn_recv; | |
744 | ||
25c4cd2b | 745 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 746 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
747 | goto done; |
748 | } | |
749 | ||
750 | syn_recv: | |
73c1f4a0 | 751 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
752 | goto next_listen; |
753 | ||
25c4cd2b | 754 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 755 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
756 | goto done; |
757 | } | |
758 | ||
759 | next_listen: | |
760 | cb->args[3] = 0; | |
761 | cb->args[4] = 0; | |
762 | ++num; | |
763 | } | |
5caea4ea | 764 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
765 | |
766 | s_num = 0; | |
767 | cb->args[3] = 0; | |
768 | cb->args[4] = 0; | |
769 | } | |
1da177e4 LT |
770 | skip_listen_ht: |
771 | cb->args[0] = 1; | |
772 | s_i = num = s_num = 0; | |
773 | } | |
774 | ||
73c1f4a0 | 775 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
d523a328 | 776 | goto unlock; |
1da177e4 | 777 | |
f373b53b | 778 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 779 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 780 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 781 | struct sock *sk; |
3ab5aee7 | 782 | struct hlist_nulls_node *node; |
1da177e4 | 783 | |
6be547a6 AK |
784 | num = 0; |
785 | ||
3ab5aee7 ED |
786 | if (hlist_nulls_empty(&head->chain) && |
787 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
788 | continue; |
789 | ||
1da177e4 LT |
790 | if (i > s_i) |
791 | s_num = 0; | |
792 | ||
7e3aab4a | 793 | spin_lock_bh(lock); |
3ab5aee7 | 794 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
795 | struct inet_sock *inet = inet_sk(sk); |
796 | ||
797 | if (num < s_num) | |
798 | goto next_normal; | |
73c1f4a0 | 799 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 800 | goto next_normal; |
d23deaa0 PE |
801 | if (r->sdiag_family != AF_UNSPEC && |
802 | sk->sk_family != r->sdiag_family) | |
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; |
25c4cd2b | 810 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 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; | |
d23deaa0 PE |
826 | if (r->sdiag_family != AF_UNSPEC && |
827 | tw->tw_family != r->sdiag_family) | |
828 | goto next_dying; | |
7dbf0755 | 829 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 830 | r->id.idiag_sport) |
1da177e4 | 831 | goto next_dying; |
7dbf0755 | 832 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 833 | r->id.idiag_dport) |
1da177e4 | 834 | goto next_dying; |
25c4cd2b | 835 | if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) { |
7e3aab4a | 836 | spin_unlock_bh(lock); |
1da177e4 LT |
837 | goto done; |
838 | } | |
839 | next_dying: | |
840 | ++num; | |
841 | } | |
842 | } | |
7e3aab4a | 843 | spin_unlock_bh(lock); |
1da177e4 LT |
844 | } |
845 | ||
846 | done: | |
847 | cb->args[1] = i; | |
848 | cb->args[2] = num; | |
d523a328 HX |
849 | unlock: |
850 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
851 | return skb->len; |
852 | } | |
853 | ||
25c4cd2b PE |
854 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
855 | { | |
856 | struct nlattr *bc = NULL; | |
857 | int hdrlen = sizeof(struct inet_diag_req); | |
858 | ||
859 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
860 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
861 | ||
862 | return __inet_diag_dump(skb, cb, (struct inet_diag_req *)NLMSG_DATA(cb->nlh), bc); | |
863 | } | |
864 | ||
a029fe26 PE |
865 | static inline int inet_diag_type2proto(int type) |
866 | { | |
867 | switch (type) { | |
868 | case TCPDIAG_GETSOCK: | |
869 | return IPPROTO_TCP; | |
870 | case DCCPDIAG_GETSOCK: | |
871 | return IPPROTO_DCCP; | |
872 | default: | |
873 | return 0; | |
874 | } | |
875 | } | |
876 | ||
25c4cd2b PE |
877 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
878 | { | |
879 | struct inet_diag_req_compat *rc = NLMSG_DATA(cb->nlh); | |
880 | struct inet_diag_req req; | |
881 | struct nlattr *bc = NULL; | |
882 | int hdrlen = sizeof(struct inet_diag_req_compat); | |
883 | ||
d23deaa0 | 884 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
885 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
886 | req.idiag_ext = rc->idiag_ext; | |
887 | req.idiag_states = rc->idiag_states; | |
888 | req.id = rc->id; | |
889 | ||
890 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
891 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
892 | ||
893 | return __inet_diag_dump(skb, cb, &req, bc); | |
894 | } | |
895 | ||
fe50ce28 PE |
896 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
897 | const struct nlmsghdr *nlh) | |
898 | { | |
899 | struct inet_diag_req_compat *rc = NLMSG_DATA(nlh); | |
900 | struct inet_diag_req req; | |
901 | ||
902 | req.sdiag_family = rc->idiag_family; | |
903 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
904 | req.idiag_ext = rc->idiag_ext; | |
905 | req.idiag_states = rc->idiag_states; | |
906 | req.id = rc->id; | |
907 | ||
908 | return inet_diag_get_exact(in_skb, nlh, &req); | |
909 | } | |
910 | ||
8d34172d | 911 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 912 | { |
126fdc32 | 913 | int hdrlen = sizeof(struct inet_diag_req_compat); |
1da177e4 | 914 | |
ead592ba TG |
915 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
916 | nlmsg_len(nlh) < hdrlen) | |
917 | return -EINVAL; | |
1da177e4 | 918 | |
b8f3ab42 | 919 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
920 | if (nlmsg_attrlen(nlh, hdrlen)) { |
921 | struct nlattr *attr; | |
1da177e4 | 922 | |
ead592ba TG |
923 | attr = nlmsg_find_attr(nlh, hdrlen, |
924 | INET_DIAG_REQ_BYTECODE); | |
925 | if (attr == NULL || | |
926 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
927 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
928 | return -EINVAL; | |
929 | } | |
1da177e4 | 930 | |
8ef874bf | 931 | return netlink_dump_start(sock_diag_nlsk, skb, nlh, |
25c4cd2b | 932 | inet_diag_dump_compat, NULL, 0); |
1da177e4 | 933 | } |
ead592ba | 934 | |
fe50ce28 | 935 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
936 | } |
937 | ||
d366477a PE |
938 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
939 | { | |
940 | int hdrlen = sizeof(struct inet_diag_req); | |
941 | ||
942 | if (nlmsg_len(h) < hdrlen) | |
943 | return -EINVAL; | |
944 | ||
945 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
946 | if (nlmsg_attrlen(h, hdrlen)) { |
947 | struct nlattr *attr; | |
948 | attr = nlmsg_find_attr(h, hdrlen, | |
949 | INET_DIAG_REQ_BYTECODE); | |
950 | if (attr == NULL || | |
951 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
952 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
953 | return -EINVAL; | |
954 | } | |
955 | ||
8ef874bf | 956 | return netlink_dump_start(sock_diag_nlsk, skb, h, |
25c4cd2b | 957 | inet_diag_dump, NULL, 0); |
d366477a PE |
958 | } |
959 | ||
fe50ce28 | 960 | return inet_diag_get_exact(skb, h, (struct inet_diag_req *)NLMSG_DATA(h)); |
d366477a PE |
961 | } |
962 | ||
963 | static struct sock_diag_handler inet_diag_handler = { | |
964 | .family = AF_INET, | |
965 | .dump = inet_diag_handler_dump, | |
966 | }; | |
967 | ||
968 | static struct sock_diag_handler inet6_diag_handler = { | |
969 | .family = AF_INET6, | |
970 | .dump = inet_diag_handler_dump, | |
971 | }; | |
972 | ||
4f5736c4 ACM |
973 | int inet_diag_register(const struct inet_diag_handler *h) |
974 | { | |
975 | const __u16 type = h->idiag_type; | |
976 | int err = -EINVAL; | |
977 | ||
f13c95f0 | 978 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
979 | goto out; |
980 | ||
d523a328 | 981 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
982 | err = -EEXIST; |
983 | if (inet_diag_table[type] == NULL) { | |
984 | inet_diag_table[type] = h; | |
985 | err = 0; | |
986 | } | |
d523a328 | 987 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
988 | out: |
989 | return err; | |
990 | } | |
991 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
992 | ||
993 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
994 | { | |
995 | const __u16 type = h->idiag_type; | |
996 | ||
f13c95f0 | 997 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
998 | return; |
999 | ||
d523a328 | 1000 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1001 | inet_diag_table[type] = NULL; |
d523a328 | 1002 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1003 | } |
1004 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1005 | ||
73c1f4a0 | 1006 | static int __init inet_diag_init(void) |
1da177e4 | 1007 | { |
f13c95f0 | 1008 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1009 | sizeof(struct inet_diag_handler *)); |
1010 | int err = -ENOMEM; | |
1011 | ||
0da974f4 | 1012 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1013 | if (!inet_diag_table) |
1014 | goto out; | |
1015 | ||
d366477a PE |
1016 | err = sock_diag_register(&inet_diag_handler); |
1017 | if (err) | |
1018 | goto out_free_nl; | |
1019 | ||
1020 | err = sock_diag_register(&inet6_diag_handler); | |
1021 | if (err) | |
1022 | goto out_free_inet; | |
1023 | ||
8ef874bf | 1024 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1025 | out: |
1026 | return err; | |
d366477a PE |
1027 | |
1028 | out_free_inet: | |
1029 | sock_diag_unregister(&inet_diag_handler); | |
1030 | out_free_nl: | |
4f5736c4 ACM |
1031 | kfree(inet_diag_table); |
1032 | goto out; | |
1da177e4 LT |
1033 | } |
1034 | ||
73c1f4a0 | 1035 | static void __exit inet_diag_exit(void) |
1da177e4 | 1036 | { |
d366477a PE |
1037 | sock_diag_unregister(&inet6_diag_handler); |
1038 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1039 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1040 | kfree(inet_diag_table); |
1da177e4 LT |
1041 | } |
1042 | ||
73c1f4a0 ACM |
1043 | module_init(inet_diag_init); |
1044 | module_exit(inet_diag_exit); | |
1da177e4 | 1045 | MODULE_LICENSE("GPL"); |
8ef874bf | 1046 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 0); |