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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 | ||
b005ab4e PE |
249 | int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req) |
250 | { | |
251 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || | |
252 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
253 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
254 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
255 | return -ESTALE; | |
256 | else | |
257 | return 0; | |
258 | } | |
259 | EXPORT_SYMBOL_GPL(inet_diag_check_cookie); | |
260 | ||
476f7dbf PE |
261 | static int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
262 | const struct nlmsghdr *nlh, struct inet_diag_req *req) | |
1da177e4 LT |
263 | { |
264 | int err; | |
265 | struct sock *sk; | |
1da177e4 | 266 | struct sk_buff *rep; |
d523a328 | 267 | |
d523a328 | 268 | err = -EINVAL; |
fe50ce28 | 269 | if (req->sdiag_family == AF_INET) { |
c67499c0 | 270 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
271 | req->id.idiag_dport, req->id.idiag_src[0], |
272 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 273 | } |
505cbfc5 | 274 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
fe50ce28 | 275 | else if (req->sdiag_family == AF_INET6) { |
d86e0dac | 276 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
277 | (struct in6_addr *)req->id.idiag_dst, |
278 | req->id.idiag_dport, | |
279 | (struct in6_addr *)req->id.idiag_src, | |
280 | req->id.idiag_sport, | |
281 | req->id.idiag_if); | |
1da177e4 LT |
282 | } |
283 | #endif | |
284 | else { | |
476f7dbf | 285 | goto out_nosk; |
1da177e4 LT |
286 | } |
287 | ||
d523a328 | 288 | err = -ENOENT; |
1da177e4 | 289 | if (sk == NULL) |
476f7dbf | 290 | goto out_nosk; |
1da177e4 | 291 | |
b005ab4e PE |
292 | err = inet_diag_check_cookie(sk, req); |
293 | if (err) | |
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) + | |
7b35eadd | 299 | sizeof(struct tcp_info) + 64)), |
4f5736c4 | 300 | GFP_KERNEL); |
1da177e4 LT |
301 | if (!rep) |
302 | goto out; | |
303 | ||
a029fe26 | 304 | err = sk_diag_fill(sk, rep, req, |
26932566 PM |
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 | } | |
8ef874bf | 312 | err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid, |
73c1f4a0 | 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 | } | |
476f7dbf PE |
324 | out_nosk: |
325 | return err; | |
326 | } | |
327 | ||
328 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
329 | const struct nlmsghdr *nlh, | |
330 | struct inet_diag_req *req) | |
331 | { | |
332 | const struct inet_diag_handler *handler; | |
333 | int err; | |
334 | ||
335 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
336 | if (IS_ERR(handler)) | |
337 | err = PTR_ERR(handler); | |
338 | else | |
339 | err = inet_diag_dump_one_icsk(handler->idiag_hashinfo, | |
340 | in_skb, nlh, req); | |
d523a328 | 341 | inet_diag_unlock_handler(handler); |
476f7dbf | 342 | |
1da177e4 LT |
343 | return err; |
344 | } | |
345 | ||
9f855299 | 346 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
347 | { |
348 | int words = bits >> 5; | |
349 | ||
350 | bits &= 0x1f; | |
351 | ||
352 | if (words) { | |
353 | if (memcmp(a1, a2, words << 2)) | |
354 | return 0; | |
355 | } | |
356 | if (bits) { | |
9f855299 AV |
357 | __be32 w1, w2; |
358 | __be32 mask; | |
1da177e4 LT |
359 | |
360 | w1 = a1[words]; | |
361 | w2 = a2[words]; | |
362 | ||
363 | mask = htonl((0xffffffff) << (32 - bits)); | |
364 | ||
365 | if ((w1 ^ w2) & mask) | |
366 | return 0; | |
367 | } | |
368 | ||
369 | return 1; | |
370 | } | |
371 | ||
372 | ||
87c22ea5 PE |
373 | static int inet_diag_bc_run(const struct nlattr *_bc, |
374 | const struct inet_diag_entry *entry) | |
1da177e4 | 375 | { |
87c22ea5 PE |
376 | const void *bc = nla_data(_bc); |
377 | int len = nla_len(_bc); | |
378 | ||
1da177e4 LT |
379 | while (len > 0) { |
380 | int yes = 1; | |
73c1f4a0 | 381 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
382 | |
383 | switch (op->code) { | |
73c1f4a0 | 384 | case INET_DIAG_BC_NOP: |
1da177e4 | 385 | break; |
73c1f4a0 | 386 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
387 | yes = 0; |
388 | break; | |
73c1f4a0 | 389 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
390 | yes = entry->sport >= op[1].no; |
391 | break; | |
73c1f4a0 | 392 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 393 | yes = entry->sport <= op[1].no; |
1da177e4 | 394 | break; |
73c1f4a0 | 395 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
396 | yes = entry->dport >= op[1].no; |
397 | break; | |
73c1f4a0 | 398 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
399 | yes = entry->dport <= op[1].no; |
400 | break; | |
73c1f4a0 | 401 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
402 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
403 | break; | |
73c1f4a0 | 404 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
405 | case INET_DIAG_BC_D_COND: { |
406 | struct inet_diag_hostcond *cond; | |
9f855299 | 407 | __be32 *addr; |
1da177e4 | 408 | |
a8c2190e | 409 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 410 | if (cond->port != -1 && |
73c1f4a0 | 411 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
412 | entry->sport : entry->dport)) { |
413 | yes = 0; | |
414 | break; | |
415 | } | |
4e852c02 | 416 | |
1da177e4 LT |
417 | if (cond->prefix_len == 0) |
418 | break; | |
419 | ||
73c1f4a0 | 420 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
421 | addr = entry->saddr; |
422 | else | |
423 | addr = entry->daddr; | |
424 | ||
4e852c02 ACM |
425 | if (bitstring_match(addr, cond->addr, |
426 | cond->prefix_len)) | |
1da177e4 LT |
427 | break; |
428 | if (entry->family == AF_INET6 && | |
429 | cond->family == AF_INET) { | |
430 | if (addr[0] == 0 && addr[1] == 0 && | |
431 | addr[2] == htonl(0xffff) && | |
a8c2190e | 432 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 433 | cond->prefix_len)) |
1da177e4 LT |
434 | break; |
435 | } | |
436 | yes = 0; | |
437 | break; | |
438 | } | |
439 | } | |
440 | ||
4e852c02 | 441 | if (yes) { |
1da177e4 LT |
442 | len -= op->yes; |
443 | bc += op->yes; | |
444 | } else { | |
445 | len -= op->no; | |
446 | bc += op->no; | |
447 | } | |
448 | } | |
a02cec21 | 449 | return len == 0; |
1da177e4 LT |
450 | } |
451 | ||
452 | static int valid_cc(const void *bc, int len, int cc) | |
453 | { | |
454 | while (len >= 0) { | |
73c1f4a0 | 455 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
456 | |
457 | if (cc > len) | |
458 | return 0; | |
459 | if (cc == len) | |
460 | return 1; | |
eeb14972 | 461 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
462 | return 0; |
463 | len -= op->yes; | |
464 | bc += op->yes; | |
465 | } | |
466 | return 0; | |
467 | } | |
468 | ||
73c1f4a0 | 469 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 470 | { |
eeb14972 | 471 | const void *bc = bytecode; |
1da177e4 LT |
472 | int len = bytecode_len; |
473 | ||
474 | while (len > 0) { | |
eeb14972 | 475 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
476 | |
477 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
478 | switch (op->code) { | |
73c1f4a0 ACM |
479 | case INET_DIAG_BC_AUTO: |
480 | case INET_DIAG_BC_S_COND: | |
481 | case INET_DIAG_BC_D_COND: | |
482 | case INET_DIAG_BC_S_GE: | |
483 | case INET_DIAG_BC_S_LE: | |
484 | case INET_DIAG_BC_D_GE: | |
485 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 486 | case INET_DIAG_BC_JMP: |
eeb14972 | 487 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
488 | return -EINVAL; |
489 | if (op->no < len && | |
a8c2190e | 490 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
491 | return -EINVAL; |
492 | break; | |
73c1f4a0 | 493 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
494 | break; |
495 | default: | |
496 | return -EINVAL; | |
497 | } | |
eeb14972 ED |
498 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
499 | return -EINVAL; | |
4e852c02 | 500 | bc += op->yes; |
1da177e4 LT |
501 | len -= op->yes; |
502 | } | |
503 | return len == 0 ? 0 : -EINVAL; | |
504 | } | |
505 | ||
dff2c035 ACM |
506 | static int inet_csk_diag_dump(struct sock *sk, |
507 | struct sk_buff *skb, | |
37f352b5 | 508 | struct netlink_callback *cb, |
25c4cd2b | 509 | struct inet_diag_req *r, |
37f352b5 | 510 | const struct nlattr *bc) |
1da177e4 | 511 | { |
37f352b5 | 512 | if (bc != NULL) { |
73c1f4a0 | 513 | struct inet_diag_entry entry; |
1da177e4 LT |
514 | struct inet_sock *inet = inet_sk(sk); |
515 | ||
516 | entry.family = sk->sk_family; | |
505cbfc5 | 517 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
518 | if (entry.family == AF_INET6) { |
519 | struct ipv6_pinfo *np = inet6_sk(sk); | |
520 | ||
521 | entry.saddr = np->rcv_saddr.s6_addr32; | |
522 | entry.daddr = np->daddr.s6_addr32; | |
523 | } else | |
524 | #endif | |
525 | { | |
c720c7e8 ED |
526 | entry.saddr = &inet->inet_rcv_saddr; |
527 | entry.daddr = &inet->inet_daddr; | |
1da177e4 | 528 | } |
c720c7e8 ED |
529 | entry.sport = inet->inet_num; |
530 | entry.dport = ntohs(inet->inet_dport); | |
1da177e4 LT |
531 | entry.userlocks = sk->sk_userlocks; |
532 | ||
87c22ea5 | 533 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
534 | return 0; |
535 | } | |
536 | ||
a029fe26 | 537 | return inet_csk_diag_fill(sk, skb, r, |
dff2c035 ACM |
538 | NETLINK_CB(cb->skb).pid, |
539 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
540 | } |
541 | ||
c7d58aab ACM |
542 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
543 | struct sk_buff *skb, | |
37f352b5 | 544 | struct netlink_callback *cb, |
25c4cd2b | 545 | struct inet_diag_req *r, |
37f352b5 | 546 | const struct nlattr *bc) |
c7d58aab | 547 | { |
37f352b5 | 548 | if (bc != NULL) { |
c7d58aab | 549 | struct inet_diag_entry entry; |
c7d58aab ACM |
550 | |
551 | entry.family = tw->tw_family; | |
552 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
553 | if (tw->tw_family == AF_INET6) { | |
554 | struct inet6_timewait_sock *tw6 = | |
555 | inet6_twsk((struct sock *)tw); | |
556 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
557 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
558 | } else | |
559 | #endif | |
560 | { | |
561 | entry.saddr = &tw->tw_rcv_saddr; | |
562 | entry.daddr = &tw->tw_daddr; | |
563 | } | |
564 | entry.sport = tw->tw_num; | |
565 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 566 | entry.userlocks = 0; |
c7d58aab | 567 | |
87c22ea5 | 568 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
569 | return 0; |
570 | } | |
571 | ||
a029fe26 | 572 | return inet_twsk_diag_fill(tw, skb, r, |
c7d58aab ACM |
573 | NETLINK_CB(cb->skb).pid, |
574 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
575 | } | |
576 | ||
73c1f4a0 | 577 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
578 | struct request_sock *req, u32 pid, u32 seq, |
579 | const struct nlmsghdr *unlh) | |
1da177e4 | 580 | { |
2e6599cb | 581 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 582 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 583 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 584 | struct inet_diag_msg *r; |
1da177e4 LT |
585 | struct nlmsghdr *nlh; |
586 | long tmo; | |
587 | ||
540722ff | 588 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
589 | nlh->nlmsg_flags = NLM_F_MULTI; |
590 | r = NLMSG_DATA(nlh); | |
591 | ||
73c1f4a0 ACM |
592 | r->idiag_family = sk->sk_family; |
593 | r->idiag_state = TCP_SYN_RECV; | |
594 | r->idiag_timer = 1; | |
595 | r->idiag_retrans = req->retrans; | |
1da177e4 | 596 | |
73c1f4a0 ACM |
597 | r->id.idiag_if = sk->sk_bound_dev_if; |
598 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
599 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
600 | |
601 | tmo = req->expires - jiffies; | |
602 | if (tmo < 0) | |
603 | tmo = 0; | |
604 | ||
c720c7e8 | 605 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
606 | r->id.idiag_dport = ireq->rmt_port; |
607 | r->id.idiag_src[0] = ireq->loc_addr; | |
608 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
609 | r->idiag_expires = jiffies_to_msecs(tmo); | |
610 | r->idiag_rqueue = 0; | |
611 | r->idiag_wqueue = 0; | |
612 | r->idiag_uid = sock_i_uid(sk); | |
613 | r->idiag_inode = 0; | |
505cbfc5 | 614 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 615 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
616 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
617 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
618 | } |
619 | #endif | |
27a884dc | 620 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
621 | |
622 | return skb->len; | |
623 | ||
624 | nlmsg_failure: | |
dc5fc579 | 625 | nlmsg_trim(skb, b); |
1da177e4 LT |
626 | return -1; |
627 | } | |
628 | ||
73c1f4a0 | 629 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 630 | struct netlink_callback *cb, |
25c4cd2b | 631 | struct inet_diag_req *r, |
37f352b5 | 632 | const struct nlattr *bc) |
1da177e4 | 633 | { |
73c1f4a0 | 634 | struct inet_diag_entry entry; |
463c84b9 | 635 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 636 | struct listen_sock *lopt; |
1da177e4 LT |
637 | struct inet_sock *inet = inet_sk(sk); |
638 | int j, s_j; | |
639 | int reqnum, s_reqnum; | |
640 | int err = 0; | |
641 | ||
642 | s_j = cb->args[3]; | |
643 | s_reqnum = cb->args[4]; | |
644 | ||
645 | if (s_j > 0) | |
646 | s_j--; | |
647 | ||
648 | entry.family = sk->sk_family; | |
649 | ||
463c84b9 | 650 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 651 | |
463c84b9 | 652 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
653 | if (!lopt || !lopt->qlen) |
654 | goto out; | |
655 | ||
37f352b5 | 656 | if (bc != NULL) { |
c720c7e8 | 657 | entry.sport = inet->inet_num; |
1da177e4 LT |
658 | entry.userlocks = sk->sk_userlocks; |
659 | } | |
660 | ||
540722ff | 661 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 662 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
663 | |
664 | reqnum = 0; | |
665 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
666 | struct inet_request_sock *ireq = inet_rsk(req); |
667 | ||
1da177e4 LT |
668 | if (reqnum < s_reqnum) |
669 | continue; | |
73c1f4a0 ACM |
670 | if (r->id.idiag_dport != ireq->rmt_port && |
671 | r->id.idiag_dport) | |
1da177e4 LT |
672 | continue; |
673 | ||
674 | if (bc) { | |
675 | entry.saddr = | |
505cbfc5 | 676 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 677 | (entry.family == AF_INET6) ? |
ca304b61 | 678 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 679 | #endif |
2e6599cb | 680 | &ireq->loc_addr; |
4e852c02 | 681 | entry.daddr = |
505cbfc5 | 682 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 683 | (entry.family == AF_INET6) ? |
ca304b61 | 684 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 685 | #endif |
2e6599cb ACM |
686 | &ireq->rmt_addr; |
687 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 688 | |
87c22ea5 | 689 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
690 | continue; |
691 | } | |
692 | ||
73c1f4a0 | 693 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 694 | NETLINK_CB(cb->skb).pid, |
540722ff | 695 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
696 | if (err < 0) { |
697 | cb->args[3] = j + 1; | |
698 | cb->args[4] = reqnum; | |
699 | goto out; | |
700 | } | |
701 | } | |
702 | ||
703 | s_reqnum = 0; | |
704 | } | |
705 | ||
706 | out: | |
463c84b9 | 707 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
708 | |
709 | return err; | |
710 | } | |
711 | ||
25c4cd2b PE |
712 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, |
713 | struct inet_diag_req *r, struct nlattr *bc) | |
1da177e4 LT |
714 | { |
715 | int i, num; | |
716 | int s_i, s_num; | |
4f5736c4 | 717 | const struct inet_diag_handler *handler; |
540722ff | 718 | struct inet_hashinfo *hashinfo; |
37f352b5 | 719 | |
25c4cd2b | 720 | handler = inet_diag_lock_handler(r->sdiag_protocol); |
8cf8e5a6 ACM |
721 | if (IS_ERR(handler)) |
722 | goto unlock; | |
d523a328 | 723 | |
4f5736c4 | 724 | hashinfo = handler->idiag_hashinfo; |
4e852c02 | 725 | |
1da177e4 LT |
726 | s_i = cb->args[1]; |
727 | s_num = num = cb->args[2]; | |
4f5736c4 | 728 | |
1da177e4 | 729 | if (cb->args[0] == 0) { |
73c1f4a0 | 730 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 731 | goto skip_listen_ht; |
540722ff | 732 | |
0f7ff927 | 733 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 734 | struct sock *sk; |
c25eb3bf | 735 | struct hlist_nulls_node *node; |
5caea4ea | 736 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
737 | |
738 | num = 0; | |
5caea4ea ED |
739 | ilb = &hashinfo->listening_hash[i]; |
740 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 741 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
742 | struct inet_sock *inet = inet_sk(sk); |
743 | ||
744 | if (num < s_num) { | |
745 | num++; | |
746 | continue; | |
747 | } | |
748 | ||
d23deaa0 PE |
749 | if (r->sdiag_family != AF_UNSPEC && |
750 | sk->sk_family != r->sdiag_family) | |
751 | goto next_listen; | |
752 | ||
c720c7e8 | 753 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 754 | r->id.idiag_sport) |
1da177e4 LT |
755 | goto next_listen; |
756 | ||
73c1f4a0 ACM |
757 | if (!(r->idiag_states & TCPF_LISTEN) || |
758 | r->id.idiag_dport || | |
1da177e4 LT |
759 | cb->args[3] > 0) |
760 | goto syn_recv; | |
761 | ||
25c4cd2b | 762 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 763 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
764 | goto done; |
765 | } | |
766 | ||
767 | syn_recv: | |
73c1f4a0 | 768 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
769 | goto next_listen; |
770 | ||
25c4cd2b | 771 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 772 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
773 | goto done; |
774 | } | |
775 | ||
776 | next_listen: | |
777 | cb->args[3] = 0; | |
778 | cb->args[4] = 0; | |
779 | ++num; | |
780 | } | |
5caea4ea | 781 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
782 | |
783 | s_num = 0; | |
784 | cb->args[3] = 0; | |
785 | cb->args[4] = 0; | |
786 | } | |
1da177e4 LT |
787 | skip_listen_ht: |
788 | cb->args[0] = 1; | |
789 | s_i = num = s_num = 0; | |
790 | } | |
791 | ||
73c1f4a0 | 792 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
d523a328 | 793 | goto unlock; |
1da177e4 | 794 | |
f373b53b | 795 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 796 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 797 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 798 | struct sock *sk; |
3ab5aee7 | 799 | struct hlist_nulls_node *node; |
1da177e4 | 800 | |
6be547a6 AK |
801 | num = 0; |
802 | ||
3ab5aee7 ED |
803 | if (hlist_nulls_empty(&head->chain) && |
804 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
805 | continue; |
806 | ||
1da177e4 LT |
807 | if (i > s_i) |
808 | s_num = 0; | |
809 | ||
7e3aab4a | 810 | spin_lock_bh(lock); |
3ab5aee7 | 811 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
812 | struct inet_sock *inet = inet_sk(sk); |
813 | ||
814 | if (num < s_num) | |
815 | goto next_normal; | |
73c1f4a0 | 816 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 817 | goto next_normal; |
d23deaa0 PE |
818 | if (r->sdiag_family != AF_UNSPEC && |
819 | sk->sk_family != r->sdiag_family) | |
820 | goto next_normal; | |
c720c7e8 | 821 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 822 | r->id.idiag_sport) |
1da177e4 | 823 | goto next_normal; |
c720c7e8 | 824 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 825 | r->id.idiag_dport) |
1da177e4 | 826 | goto next_normal; |
25c4cd2b | 827 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
7e3aab4a | 828 | spin_unlock_bh(lock); |
1da177e4 LT |
829 | goto done; |
830 | } | |
831 | next_normal: | |
832 | ++num; | |
833 | } | |
834 | ||
73c1f4a0 | 835 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
836 | struct inet_timewait_sock *tw; |
837 | ||
838 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 839 | &head->twchain) { |
1da177e4 LT |
840 | |
841 | if (num < s_num) | |
842 | goto next_dying; | |
d23deaa0 PE |
843 | if (r->sdiag_family != AF_UNSPEC && |
844 | tw->tw_family != r->sdiag_family) | |
845 | goto next_dying; | |
7dbf0755 | 846 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 847 | r->id.idiag_sport) |
1da177e4 | 848 | goto next_dying; |
7dbf0755 | 849 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 850 | r->id.idiag_dport) |
1da177e4 | 851 | goto next_dying; |
25c4cd2b | 852 | if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) { |
7e3aab4a | 853 | spin_unlock_bh(lock); |
1da177e4 LT |
854 | goto done; |
855 | } | |
856 | next_dying: | |
857 | ++num; | |
858 | } | |
859 | } | |
7e3aab4a | 860 | spin_unlock_bh(lock); |
1da177e4 LT |
861 | } |
862 | ||
863 | done: | |
864 | cb->args[1] = i; | |
865 | cb->args[2] = num; | |
d523a328 HX |
866 | unlock: |
867 | inet_diag_unlock_handler(handler); | |
1da177e4 LT |
868 | return skb->len; |
869 | } | |
870 | ||
25c4cd2b PE |
871 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
872 | { | |
873 | struct nlattr *bc = NULL; | |
874 | int hdrlen = sizeof(struct inet_diag_req); | |
875 | ||
876 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
877 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
878 | ||
879 | return __inet_diag_dump(skb, cb, (struct inet_diag_req *)NLMSG_DATA(cb->nlh), bc); | |
880 | } | |
881 | ||
a029fe26 PE |
882 | static inline int inet_diag_type2proto(int type) |
883 | { | |
884 | switch (type) { | |
885 | case TCPDIAG_GETSOCK: | |
886 | return IPPROTO_TCP; | |
887 | case DCCPDIAG_GETSOCK: | |
888 | return IPPROTO_DCCP; | |
889 | default: | |
890 | return 0; | |
891 | } | |
892 | } | |
893 | ||
25c4cd2b PE |
894 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
895 | { | |
896 | struct inet_diag_req_compat *rc = NLMSG_DATA(cb->nlh); | |
897 | struct inet_diag_req req; | |
898 | struct nlattr *bc = NULL; | |
899 | int hdrlen = sizeof(struct inet_diag_req_compat); | |
900 | ||
d23deaa0 | 901 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
902 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
903 | req.idiag_ext = rc->idiag_ext; | |
904 | req.idiag_states = rc->idiag_states; | |
905 | req.id = rc->id; | |
906 | ||
907 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
908 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
909 | ||
910 | return __inet_diag_dump(skb, cb, &req, bc); | |
911 | } | |
912 | ||
fe50ce28 PE |
913 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
914 | const struct nlmsghdr *nlh) | |
915 | { | |
916 | struct inet_diag_req_compat *rc = NLMSG_DATA(nlh); | |
917 | struct inet_diag_req req; | |
918 | ||
919 | req.sdiag_family = rc->idiag_family; | |
920 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
921 | req.idiag_ext = rc->idiag_ext; | |
922 | req.idiag_states = rc->idiag_states; | |
923 | req.id = rc->id; | |
924 | ||
925 | return inet_diag_get_exact(in_skb, nlh, &req); | |
926 | } | |
927 | ||
8d34172d | 928 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 929 | { |
126fdc32 | 930 | int hdrlen = sizeof(struct inet_diag_req_compat); |
1da177e4 | 931 | |
ead592ba TG |
932 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
933 | nlmsg_len(nlh) < hdrlen) | |
934 | return -EINVAL; | |
1da177e4 | 935 | |
b8f3ab42 | 936 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
937 | if (nlmsg_attrlen(nlh, hdrlen)) { |
938 | struct nlattr *attr; | |
1da177e4 | 939 | |
ead592ba TG |
940 | attr = nlmsg_find_attr(nlh, hdrlen, |
941 | INET_DIAG_REQ_BYTECODE); | |
942 | if (attr == NULL || | |
943 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
944 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
945 | return -EINVAL; | |
946 | } | |
1da177e4 | 947 | |
8ef874bf | 948 | return netlink_dump_start(sock_diag_nlsk, skb, nlh, |
25c4cd2b | 949 | inet_diag_dump_compat, NULL, 0); |
1da177e4 | 950 | } |
ead592ba | 951 | |
fe50ce28 | 952 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
953 | } |
954 | ||
d366477a PE |
955 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
956 | { | |
957 | int hdrlen = sizeof(struct inet_diag_req); | |
958 | ||
959 | if (nlmsg_len(h) < hdrlen) | |
960 | return -EINVAL; | |
961 | ||
962 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
963 | if (nlmsg_attrlen(h, hdrlen)) { |
964 | struct nlattr *attr; | |
965 | attr = nlmsg_find_attr(h, hdrlen, | |
966 | INET_DIAG_REQ_BYTECODE); | |
967 | if (attr == NULL || | |
968 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
969 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
970 | return -EINVAL; | |
971 | } | |
972 | ||
8ef874bf | 973 | return netlink_dump_start(sock_diag_nlsk, skb, h, |
25c4cd2b | 974 | inet_diag_dump, NULL, 0); |
d366477a PE |
975 | } |
976 | ||
fe50ce28 | 977 | return inet_diag_get_exact(skb, h, (struct inet_diag_req *)NLMSG_DATA(h)); |
d366477a PE |
978 | } |
979 | ||
980 | static struct sock_diag_handler inet_diag_handler = { | |
981 | .family = AF_INET, | |
982 | .dump = inet_diag_handler_dump, | |
983 | }; | |
984 | ||
985 | static struct sock_diag_handler inet6_diag_handler = { | |
986 | .family = AF_INET6, | |
987 | .dump = inet_diag_handler_dump, | |
988 | }; | |
989 | ||
4f5736c4 ACM |
990 | int inet_diag_register(const struct inet_diag_handler *h) |
991 | { | |
992 | const __u16 type = h->idiag_type; | |
993 | int err = -EINVAL; | |
994 | ||
f13c95f0 | 995 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
996 | goto out; |
997 | ||
d523a328 | 998 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
999 | err = -EEXIST; |
1000 | if (inet_diag_table[type] == NULL) { | |
1001 | inet_diag_table[type] = h; | |
1002 | err = 0; | |
1003 | } | |
d523a328 | 1004 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1005 | out: |
1006 | return err; | |
1007 | } | |
1008 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1009 | ||
1010 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1011 | { | |
1012 | const __u16 type = h->idiag_type; | |
1013 | ||
f13c95f0 | 1014 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1015 | return; |
1016 | ||
d523a328 | 1017 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1018 | inet_diag_table[type] = NULL; |
d523a328 | 1019 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1020 | } |
1021 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1022 | ||
73c1f4a0 | 1023 | static int __init inet_diag_init(void) |
1da177e4 | 1024 | { |
f13c95f0 | 1025 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1026 | sizeof(struct inet_diag_handler *)); |
1027 | int err = -ENOMEM; | |
1028 | ||
0da974f4 | 1029 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1030 | if (!inet_diag_table) |
1031 | goto out; | |
1032 | ||
d366477a PE |
1033 | err = sock_diag_register(&inet_diag_handler); |
1034 | if (err) | |
1035 | goto out_free_nl; | |
1036 | ||
1037 | err = sock_diag_register(&inet6_diag_handler); | |
1038 | if (err) | |
1039 | goto out_free_inet; | |
1040 | ||
8ef874bf | 1041 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1042 | out: |
1043 | return err; | |
d366477a PE |
1044 | |
1045 | out_free_inet: | |
1046 | sock_diag_unregister(&inet_diag_handler); | |
1047 | out_free_nl: | |
4f5736c4 ACM |
1048 | kfree(inet_diag_table); |
1049 | goto out; | |
1da177e4 LT |
1050 | } |
1051 | ||
73c1f4a0 | 1052 | static void __exit inet_diag_exit(void) |
1da177e4 | 1053 | { |
d366477a PE |
1054 | sock_diag_unregister(&inet6_diag_handler); |
1055 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1056 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1057 | kfree(inet_diag_table); |
1da177e4 LT |
1058 | } |
1059 | ||
73c1f4a0 ACM |
1060 | module_init(inet_diag_init); |
1061 | module_exit(inet_diag_exit); | |
1da177e4 | 1062 | MODULE_LICENSE("GPL"); |
8ef874bf | 1063 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 0); |