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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 | ||
3c4d05c8 | 73 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
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); |
73c1f4a0 | 79 | struct inet_diag_msg *r; |
1da177e4 | 80 | struct nlmsghdr *nlh; |
4f5736c4 | 81 | void *info = NULL; |
73c1f4a0 | 82 | struct inet_diag_meminfo *minfo = NULL; |
27a884dc | 83 | unsigned char *b = skb_tail_pointer(skb); |
4f5736c4 | 84 | const struct inet_diag_handler *handler; |
a029fe26 | 85 | int ext = req->idiag_ext; |
4f5736c4 | 86 | |
a029fe26 | 87 | handler = inet_diag_table[req->sdiag_protocol]; |
4f5736c4 | 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 | ||
73c1f4a0 ACM |
99 | r->idiag_family = sk->sk_family; |
100 | r->idiag_state = sk->sk_state; | |
101 | r->idiag_timer = 0; | |
102 | r->idiag_retrans = 0; | |
1da177e4 | 103 | |
73c1f4a0 ACM |
104 | r->id.idiag_if = sk->sk_bound_dev_if; |
105 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; | |
106 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); | |
1da177e4 | 107 | |
c720c7e8 ED |
108 | r->id.idiag_sport = inet->inet_sport; |
109 | r->id.idiag_dport = inet->inet_dport; | |
110 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
111 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 112 | |
717b6d83 MŻ |
113 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
114 | * hence this needs to be included regardless of socket family. | |
115 | */ | |
116 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
117 | RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos); | |
118 | ||
dfd56b8b | 119 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 120 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 121 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 122 | |
4e3fd7a0 AD |
123 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
124 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
06236ac3 MŻ |
125 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
126 | RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass); | |
1da177e4 LT |
127 | } |
128 | #endif | |
129 | ||
3c4d05c8 PE |
130 | r->idiag_uid = sock_i_uid(sk); |
131 | r->idiag_inode = sock_i_ino(sk); | |
132 | ||
133 | if (minfo) { | |
134 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); | |
135 | minfo->idiag_wmem = sk->sk_wmem_queued; | |
136 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
137 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); | |
138 | } | |
139 | ||
140 | if (icsk == NULL) { | |
141 | r->idiag_rqueue = r->idiag_wqueue = 0; | |
142 | goto out; | |
143 | } | |
144 | ||
172589cc | 145 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 146 | |
463c84b9 | 147 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
148 | r->idiag_timer = 1; |
149 | r->idiag_retrans = icsk->icsk_retransmits; | |
150 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 151 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
152 | r->idiag_timer = 4; |
153 | r->idiag_retrans = icsk->icsk_probes_out; | |
154 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 155 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
156 | r->idiag_timer = 2; |
157 | r->idiag_retrans = icsk->icsk_probes_out; | |
158 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 159 | } else { |
73c1f4a0 ACM |
160 | r->idiag_timer = 0; |
161 | r->idiag_expires = 0; | |
1da177e4 LT |
162 | } |
163 | #undef EXPIRES_IN_MS | |
540722ff | 164 | |
3c4d05c8 PE |
165 | if (ext & (1 << (INET_DIAG_INFO - 1))) |
166 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, sizeof(struct tcp_info)); | |
1da177e4 | 167 | |
3c4d05c8 PE |
168 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { |
169 | const size_t len = strlen(icsk->icsk_ca_ops->name); | |
170 | ||
171 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), | |
172 | icsk->icsk_ca_ops->name); | |
1da177e4 LT |
173 | } |
174 | ||
4f5736c4 | 175 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 176 | |
6687e988 ACM |
177 | if (sk->sk_state < TCP_TIME_WAIT && |
178 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
179 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 180 | |
3c4d05c8 | 181 | out: |
27a884dc | 182 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
183 | return skb->len; |
184 | ||
7c99c909 | 185 | rtattr_failure: |
1da177e4 | 186 | nlmsg_failure: |
dc5fc579 | 187 | nlmsg_trim(skb, b); |
26932566 | 188 | return -EMSGSIZE; |
1da177e4 | 189 | } |
3c4d05c8 PE |
190 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
191 | ||
192 | static int inet_csk_diag_fill(struct sock *sk, | |
193 | struct sk_buff *skb, struct inet_diag_req *req, | |
194 | u32 pid, u32 seq, u16 nlmsg_flags, | |
195 | const struct nlmsghdr *unlh) | |
196 | { | |
197 | return inet_sk_diag_fill(sk, inet_csk(sk), | |
198 | skb, req, pid, seq, nlmsg_flags, unlh); | |
199 | } | |
1da177e4 | 200 | |
c7d58aab | 201 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
a029fe26 PE |
202 | struct sk_buff *skb, struct inet_diag_req *req, |
203 | u32 pid, u32 seq, u16 nlmsg_flags, | |
c7d58aab ACM |
204 | const struct nlmsghdr *unlh) |
205 | { | |
206 | long tmo; | |
207 | struct inet_diag_msg *r; | |
27a884dc | 208 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
209 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
210 | unlh->nlmsg_type, sizeof(*r)); | |
211 | ||
212 | r = NLMSG_DATA(nlh); | |
213 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
214 | ||
215 | nlh->nlmsg_flags = nlmsg_flags; | |
216 | ||
217 | tmo = tw->tw_ttd - jiffies; | |
218 | if (tmo < 0) | |
219 | tmo = 0; | |
220 | ||
221 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
222 | r->idiag_retrans = 0; |
223 | r->id.idiag_if = tw->tw_bound_dev_if; | |
224 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
225 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
226 | r->id.idiag_sport = tw->tw_sport; | |
227 | r->id.idiag_dport = tw->tw_dport; | |
228 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
229 | r->id.idiag_dst[0] = tw->tw_daddr; | |
230 | r->idiag_state = tw->tw_substate; | |
231 | r->idiag_timer = 3; | |
172589cc | 232 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
233 | r->idiag_rqueue = 0; |
234 | r->idiag_wqueue = 0; | |
235 | r->idiag_uid = 0; | |
236 | r->idiag_inode = 0; | |
dfd56b8b | 237 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
238 | if (tw->tw_family == AF_INET6) { |
239 | const struct inet6_timewait_sock *tw6 = | |
240 | inet6_twsk((struct sock *)tw); | |
241 | ||
4e3fd7a0 AD |
242 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
243 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
244 | } |
245 | #endif | |
27a884dc | 246 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
247 | return skb->len; |
248 | nlmsg_failure: | |
dc5fc579 | 249 | nlmsg_trim(skb, previous_tail); |
26932566 | 250 | return -EMSGSIZE; |
c7d58aab ACM |
251 | } |
252 | ||
dff2c035 | 253 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
a029fe26 | 254 | struct inet_diag_req *r, u32 pid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
255 | const struct nlmsghdr *unlh) |
256 | { | |
257 | if (sk->sk_state == TCP_TIME_WAIT) | |
258 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
a029fe26 | 259 | skb, r, pid, seq, nlmsg_flags, |
dff2c035 | 260 | unlh); |
a029fe26 | 261 | return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh); |
dff2c035 ACM |
262 | } |
263 | ||
b005ab4e PE |
264 | int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req) |
265 | { | |
266 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || | |
267 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
268 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
269 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
270 | return -ESTALE; | |
271 | else | |
272 | return 0; | |
273 | } | |
274 | EXPORT_SYMBOL_GPL(inet_diag_check_cookie); | |
275 | ||
1942c518 | 276 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
476f7dbf | 277 | const struct nlmsghdr *nlh, struct inet_diag_req *req) |
1da177e4 LT |
278 | { |
279 | int err; | |
280 | struct sock *sk; | |
1da177e4 | 281 | struct sk_buff *rep; |
d523a328 | 282 | |
d523a328 | 283 | err = -EINVAL; |
fe50ce28 | 284 | if (req->sdiag_family == AF_INET) { |
c67499c0 | 285 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
286 | req->id.idiag_dport, req->id.idiag_src[0], |
287 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 288 | } |
dfd56b8b | 289 | #if IS_ENABLED(CONFIG_IPV6) |
fe50ce28 | 290 | else if (req->sdiag_family == AF_INET6) { |
d86e0dac | 291 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
292 | (struct in6_addr *)req->id.idiag_dst, |
293 | req->id.idiag_dport, | |
294 | (struct in6_addr *)req->id.idiag_src, | |
295 | req->id.idiag_sport, | |
296 | req->id.idiag_if); | |
1da177e4 LT |
297 | } |
298 | #endif | |
299 | else { | |
476f7dbf | 300 | goto out_nosk; |
1da177e4 LT |
301 | } |
302 | ||
d523a328 | 303 | err = -ENOENT; |
1da177e4 | 304 | if (sk == NULL) |
476f7dbf | 305 | goto out_nosk; |
1da177e4 | 306 | |
b005ab4e PE |
307 | err = inet_diag_check_cookie(sk, req); |
308 | if (err) | |
1da177e4 LT |
309 | goto out; |
310 | ||
311 | err = -ENOMEM; | |
73c1f4a0 ACM |
312 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
313 | sizeof(struct inet_diag_meminfo) + | |
7b35eadd | 314 | sizeof(struct tcp_info) + 64)), |
4f5736c4 | 315 | GFP_KERNEL); |
1da177e4 LT |
316 | if (!rep) |
317 | goto out; | |
318 | ||
a029fe26 | 319 | err = sk_diag_fill(sk, rep, req, |
26932566 PM |
320 | NETLINK_CB(in_skb).pid, |
321 | nlh->nlmsg_seq, 0, nlh); | |
322 | if (err < 0) { | |
323 | WARN_ON(err == -EMSGSIZE); | |
324 | kfree_skb(rep); | |
325 | goto out; | |
326 | } | |
8ef874bf | 327 | err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid, |
73c1f4a0 | 328 | MSG_DONTWAIT); |
1da177e4 LT |
329 | if (err > 0) |
330 | err = 0; | |
331 | ||
332 | out: | |
333 | if (sk) { | |
334 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 335 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
336 | else |
337 | sock_put(sk); | |
338 | } | |
476f7dbf PE |
339 | out_nosk: |
340 | return err; | |
341 | } | |
1942c518 | 342 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
343 | |
344 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
345 | const struct nlmsghdr *nlh, | |
346 | struct inet_diag_req *req) | |
347 | { | |
348 | const struct inet_diag_handler *handler; | |
349 | int err; | |
350 | ||
351 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
352 | if (IS_ERR(handler)) | |
353 | err = PTR_ERR(handler); | |
354 | else | |
1942c518 | 355 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 356 | inet_diag_unlock_handler(handler); |
476f7dbf | 357 | |
1da177e4 LT |
358 | return err; |
359 | } | |
360 | ||
9f855299 | 361 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
362 | { |
363 | int words = bits >> 5; | |
364 | ||
365 | bits &= 0x1f; | |
366 | ||
367 | if (words) { | |
368 | if (memcmp(a1, a2, words << 2)) | |
369 | return 0; | |
370 | } | |
371 | if (bits) { | |
9f855299 AV |
372 | __be32 w1, w2; |
373 | __be32 mask; | |
1da177e4 LT |
374 | |
375 | w1 = a1[words]; | |
376 | w2 = a2[words]; | |
377 | ||
378 | mask = htonl((0xffffffff) << (32 - bits)); | |
379 | ||
380 | if ((w1 ^ w2) & mask) | |
381 | return 0; | |
382 | } | |
383 | ||
384 | return 1; | |
385 | } | |
386 | ||
387 | ||
87c22ea5 PE |
388 | static int inet_diag_bc_run(const struct nlattr *_bc, |
389 | const struct inet_diag_entry *entry) | |
1da177e4 | 390 | { |
87c22ea5 PE |
391 | const void *bc = nla_data(_bc); |
392 | int len = nla_len(_bc); | |
393 | ||
1da177e4 LT |
394 | while (len > 0) { |
395 | int yes = 1; | |
73c1f4a0 | 396 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
397 | |
398 | switch (op->code) { | |
73c1f4a0 | 399 | case INET_DIAG_BC_NOP: |
1da177e4 | 400 | break; |
73c1f4a0 | 401 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
402 | yes = 0; |
403 | break; | |
73c1f4a0 | 404 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
405 | yes = entry->sport >= op[1].no; |
406 | break; | |
73c1f4a0 | 407 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 408 | yes = entry->sport <= op[1].no; |
1da177e4 | 409 | break; |
73c1f4a0 | 410 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
411 | yes = entry->dport >= op[1].no; |
412 | break; | |
73c1f4a0 | 413 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
414 | yes = entry->dport <= op[1].no; |
415 | break; | |
73c1f4a0 | 416 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
417 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
418 | break; | |
73c1f4a0 | 419 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
420 | case INET_DIAG_BC_D_COND: { |
421 | struct inet_diag_hostcond *cond; | |
9f855299 | 422 | __be32 *addr; |
1da177e4 | 423 | |
a8c2190e | 424 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 425 | if (cond->port != -1 && |
73c1f4a0 | 426 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
427 | entry->sport : entry->dport)) { |
428 | yes = 0; | |
429 | break; | |
430 | } | |
4e852c02 | 431 | |
1da177e4 LT |
432 | if (cond->prefix_len == 0) |
433 | break; | |
434 | ||
73c1f4a0 | 435 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
436 | addr = entry->saddr; |
437 | else | |
438 | addr = entry->daddr; | |
439 | ||
4e852c02 ACM |
440 | if (bitstring_match(addr, cond->addr, |
441 | cond->prefix_len)) | |
1da177e4 LT |
442 | break; |
443 | if (entry->family == AF_INET6 && | |
444 | cond->family == AF_INET) { | |
445 | if (addr[0] == 0 && addr[1] == 0 && | |
446 | addr[2] == htonl(0xffff) && | |
a8c2190e | 447 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 448 | cond->prefix_len)) |
1da177e4 LT |
449 | break; |
450 | } | |
451 | yes = 0; | |
452 | break; | |
453 | } | |
454 | } | |
455 | ||
4e852c02 | 456 | if (yes) { |
1da177e4 LT |
457 | len -= op->yes; |
458 | bc += op->yes; | |
459 | } else { | |
460 | len -= op->no; | |
461 | bc += op->no; | |
462 | } | |
463 | } | |
a02cec21 | 464 | return len == 0; |
1da177e4 LT |
465 | } |
466 | ||
8d07d151 PE |
467 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
468 | { | |
469 | struct inet_diag_entry entry; | |
470 | struct inet_sock *inet = inet_sk(sk); | |
471 | ||
472 | if (bc == NULL) | |
473 | return 1; | |
474 | ||
475 | entry.family = sk->sk_family; | |
dfd56b8b | 476 | #if IS_ENABLED(CONFIG_IPV6) |
8d07d151 PE |
477 | if (entry.family == AF_INET6) { |
478 | struct ipv6_pinfo *np = inet6_sk(sk); | |
479 | ||
480 | entry.saddr = np->rcv_saddr.s6_addr32; | |
481 | entry.daddr = np->daddr.s6_addr32; | |
482 | } else | |
483 | #endif | |
484 | { | |
485 | entry.saddr = &inet->inet_rcv_saddr; | |
486 | entry.daddr = &inet->inet_daddr; | |
487 | } | |
488 | entry.sport = inet->inet_num; | |
489 | entry.dport = ntohs(inet->inet_dport); | |
490 | entry.userlocks = sk->sk_userlocks; | |
491 | ||
492 | return inet_diag_bc_run(bc, &entry); | |
493 | } | |
494 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
495 | ||
1da177e4 LT |
496 | static int valid_cc(const void *bc, int len, int cc) |
497 | { | |
498 | while (len >= 0) { | |
73c1f4a0 | 499 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
500 | |
501 | if (cc > len) | |
502 | return 0; | |
503 | if (cc == len) | |
504 | return 1; | |
eeb14972 | 505 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
506 | return 0; |
507 | len -= op->yes; | |
508 | bc += op->yes; | |
509 | } | |
510 | return 0; | |
511 | } | |
512 | ||
73c1f4a0 | 513 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 514 | { |
eeb14972 | 515 | const void *bc = bytecode; |
1da177e4 LT |
516 | int len = bytecode_len; |
517 | ||
518 | while (len > 0) { | |
eeb14972 | 519 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
520 | |
521 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
522 | switch (op->code) { | |
73c1f4a0 ACM |
523 | case INET_DIAG_BC_AUTO: |
524 | case INET_DIAG_BC_S_COND: | |
525 | case INET_DIAG_BC_D_COND: | |
526 | case INET_DIAG_BC_S_GE: | |
527 | case INET_DIAG_BC_S_LE: | |
528 | case INET_DIAG_BC_D_GE: | |
529 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 530 | case INET_DIAG_BC_JMP: |
eeb14972 | 531 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
532 | return -EINVAL; |
533 | if (op->no < len && | |
a8c2190e | 534 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
535 | return -EINVAL; |
536 | break; | |
73c1f4a0 | 537 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
538 | break; |
539 | default: | |
540 | return -EINVAL; | |
541 | } | |
eeb14972 ED |
542 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
543 | return -EINVAL; | |
4e852c02 | 544 | bc += op->yes; |
1da177e4 LT |
545 | len -= op->yes; |
546 | } | |
547 | return len == 0 ? 0 : -EINVAL; | |
548 | } | |
549 | ||
dff2c035 ACM |
550 | static int inet_csk_diag_dump(struct sock *sk, |
551 | struct sk_buff *skb, | |
37f352b5 | 552 | struct netlink_callback *cb, |
25c4cd2b | 553 | struct inet_diag_req *r, |
37f352b5 | 554 | const struct nlattr *bc) |
1da177e4 | 555 | { |
8d07d151 PE |
556 | if (!inet_diag_bc_sk(bc, sk)) |
557 | return 0; | |
1da177e4 | 558 | |
a029fe26 | 559 | return inet_csk_diag_fill(sk, skb, r, |
dff2c035 ACM |
560 | NETLINK_CB(cb->skb).pid, |
561 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
562 | } |
563 | ||
c7d58aab ACM |
564 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
565 | struct sk_buff *skb, | |
37f352b5 | 566 | struct netlink_callback *cb, |
25c4cd2b | 567 | struct inet_diag_req *r, |
37f352b5 | 568 | const struct nlattr *bc) |
c7d58aab | 569 | { |
37f352b5 | 570 | if (bc != NULL) { |
c7d58aab | 571 | struct inet_diag_entry entry; |
c7d58aab ACM |
572 | |
573 | entry.family = tw->tw_family; | |
dfd56b8b | 574 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
575 | if (tw->tw_family == AF_INET6) { |
576 | struct inet6_timewait_sock *tw6 = | |
577 | inet6_twsk((struct sock *)tw); | |
578 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
579 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
580 | } else | |
581 | #endif | |
582 | { | |
583 | entry.saddr = &tw->tw_rcv_saddr; | |
584 | entry.daddr = &tw->tw_daddr; | |
585 | } | |
586 | entry.sport = tw->tw_num; | |
587 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 588 | entry.userlocks = 0; |
c7d58aab | 589 | |
87c22ea5 | 590 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
591 | return 0; |
592 | } | |
593 | ||
a029fe26 | 594 | return inet_twsk_diag_fill(tw, skb, r, |
c7d58aab ACM |
595 | NETLINK_CB(cb->skb).pid, |
596 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
597 | } | |
598 | ||
73c1f4a0 | 599 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
600 | struct request_sock *req, u32 pid, u32 seq, |
601 | const struct nlmsghdr *unlh) | |
1da177e4 | 602 | { |
2e6599cb | 603 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 604 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 605 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 606 | struct inet_diag_msg *r; |
1da177e4 LT |
607 | struct nlmsghdr *nlh; |
608 | long tmo; | |
609 | ||
540722ff | 610 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
611 | nlh->nlmsg_flags = NLM_F_MULTI; |
612 | r = NLMSG_DATA(nlh); | |
613 | ||
73c1f4a0 ACM |
614 | r->idiag_family = sk->sk_family; |
615 | r->idiag_state = TCP_SYN_RECV; | |
616 | r->idiag_timer = 1; | |
617 | r->idiag_retrans = req->retrans; | |
1da177e4 | 618 | |
73c1f4a0 ACM |
619 | r->id.idiag_if = sk->sk_bound_dev_if; |
620 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
621 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
622 | |
623 | tmo = req->expires - jiffies; | |
624 | if (tmo < 0) | |
625 | tmo = 0; | |
626 | ||
c720c7e8 | 627 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
628 | r->id.idiag_dport = ireq->rmt_port; |
629 | r->id.idiag_src[0] = ireq->loc_addr; | |
630 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
631 | r->idiag_expires = jiffies_to_msecs(tmo); | |
632 | r->idiag_rqueue = 0; | |
633 | r->idiag_wqueue = 0; | |
634 | r->idiag_uid = sock_i_uid(sk); | |
635 | r->idiag_inode = 0; | |
dfd56b8b | 636 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 637 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
638 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
639 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
640 | } |
641 | #endif | |
27a884dc | 642 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
643 | |
644 | return skb->len; | |
645 | ||
646 | nlmsg_failure: | |
dc5fc579 | 647 | nlmsg_trim(skb, b); |
1da177e4 LT |
648 | return -1; |
649 | } | |
650 | ||
73c1f4a0 | 651 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 652 | struct netlink_callback *cb, |
25c4cd2b | 653 | struct inet_diag_req *r, |
37f352b5 | 654 | const struct nlattr *bc) |
1da177e4 | 655 | { |
73c1f4a0 | 656 | struct inet_diag_entry entry; |
463c84b9 | 657 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 658 | struct listen_sock *lopt; |
1da177e4 LT |
659 | struct inet_sock *inet = inet_sk(sk); |
660 | int j, s_j; | |
661 | int reqnum, s_reqnum; | |
662 | int err = 0; | |
663 | ||
664 | s_j = cb->args[3]; | |
665 | s_reqnum = cb->args[4]; | |
666 | ||
667 | if (s_j > 0) | |
668 | s_j--; | |
669 | ||
670 | entry.family = sk->sk_family; | |
671 | ||
463c84b9 | 672 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 673 | |
463c84b9 | 674 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
675 | if (!lopt || !lopt->qlen) |
676 | goto out; | |
677 | ||
37f352b5 | 678 | if (bc != NULL) { |
c720c7e8 | 679 | entry.sport = inet->inet_num; |
1da177e4 LT |
680 | entry.userlocks = sk->sk_userlocks; |
681 | } | |
682 | ||
540722ff | 683 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 684 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
685 | |
686 | reqnum = 0; | |
687 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
688 | struct inet_request_sock *ireq = inet_rsk(req); |
689 | ||
1da177e4 LT |
690 | if (reqnum < s_reqnum) |
691 | continue; | |
73c1f4a0 ACM |
692 | if (r->id.idiag_dport != ireq->rmt_port && |
693 | r->id.idiag_dport) | |
1da177e4 LT |
694 | continue; |
695 | ||
696 | if (bc) { | |
697 | entry.saddr = | |
dfd56b8b | 698 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 699 | (entry.family == AF_INET6) ? |
ca304b61 | 700 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 701 | #endif |
2e6599cb | 702 | &ireq->loc_addr; |
4e852c02 | 703 | entry.daddr = |
dfd56b8b | 704 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 705 | (entry.family == AF_INET6) ? |
ca304b61 | 706 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 707 | #endif |
2e6599cb ACM |
708 | &ireq->rmt_addr; |
709 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 710 | |
87c22ea5 | 711 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
712 | continue; |
713 | } | |
714 | ||
73c1f4a0 | 715 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 716 | NETLINK_CB(cb->skb).pid, |
540722ff | 717 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
718 | if (err < 0) { |
719 | cb->args[3] = j + 1; | |
720 | cb->args[4] = reqnum; | |
721 | goto out; | |
722 | } | |
723 | } | |
724 | ||
725 | s_reqnum = 0; | |
726 | } | |
727 | ||
728 | out: | |
463c84b9 | 729 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
730 | |
731 | return err; | |
732 | } | |
733 | ||
1942c518 | 734 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
efb3cb42 | 735 | struct netlink_callback *cb, struct inet_diag_req *r, struct nlattr *bc) |
1da177e4 LT |
736 | { |
737 | int i, num; | |
738 | int s_i, s_num; | |
4e852c02 | 739 | |
1da177e4 LT |
740 | s_i = cb->args[1]; |
741 | s_num = num = cb->args[2]; | |
4f5736c4 | 742 | |
1da177e4 | 743 | if (cb->args[0] == 0) { |
73c1f4a0 | 744 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 745 | goto skip_listen_ht; |
540722ff | 746 | |
0f7ff927 | 747 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 748 | struct sock *sk; |
c25eb3bf | 749 | struct hlist_nulls_node *node; |
5caea4ea | 750 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
751 | |
752 | num = 0; | |
5caea4ea ED |
753 | ilb = &hashinfo->listening_hash[i]; |
754 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 755 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
756 | struct inet_sock *inet = inet_sk(sk); |
757 | ||
758 | if (num < s_num) { | |
759 | num++; | |
760 | continue; | |
761 | } | |
762 | ||
d23deaa0 PE |
763 | if (r->sdiag_family != AF_UNSPEC && |
764 | sk->sk_family != r->sdiag_family) | |
765 | goto next_listen; | |
766 | ||
c720c7e8 | 767 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 768 | r->id.idiag_sport) |
1da177e4 LT |
769 | goto next_listen; |
770 | ||
73c1f4a0 ACM |
771 | if (!(r->idiag_states & TCPF_LISTEN) || |
772 | r->id.idiag_dport || | |
1da177e4 LT |
773 | cb->args[3] > 0) |
774 | goto syn_recv; | |
775 | ||
25c4cd2b | 776 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 777 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
778 | goto done; |
779 | } | |
780 | ||
781 | syn_recv: | |
73c1f4a0 | 782 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
783 | goto next_listen; |
784 | ||
25c4cd2b | 785 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 786 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
787 | goto done; |
788 | } | |
789 | ||
790 | next_listen: | |
791 | cb->args[3] = 0; | |
792 | cb->args[4] = 0; | |
793 | ++num; | |
794 | } | |
5caea4ea | 795 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
796 | |
797 | s_num = 0; | |
798 | cb->args[3] = 0; | |
799 | cb->args[4] = 0; | |
800 | } | |
1da177e4 LT |
801 | skip_listen_ht: |
802 | cb->args[0] = 1; | |
803 | s_i = num = s_num = 0; | |
804 | } | |
805 | ||
73c1f4a0 | 806 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 807 | goto out; |
1da177e4 | 808 | |
f373b53b | 809 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 810 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 811 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 812 | struct sock *sk; |
3ab5aee7 | 813 | struct hlist_nulls_node *node; |
1da177e4 | 814 | |
6be547a6 AK |
815 | num = 0; |
816 | ||
3ab5aee7 ED |
817 | if (hlist_nulls_empty(&head->chain) && |
818 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
819 | continue; |
820 | ||
1da177e4 LT |
821 | if (i > s_i) |
822 | s_num = 0; | |
823 | ||
7e3aab4a | 824 | spin_lock_bh(lock); |
3ab5aee7 | 825 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
826 | struct inet_sock *inet = inet_sk(sk); |
827 | ||
828 | if (num < s_num) | |
829 | goto next_normal; | |
73c1f4a0 | 830 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 831 | goto next_normal; |
d23deaa0 PE |
832 | if (r->sdiag_family != AF_UNSPEC && |
833 | sk->sk_family != r->sdiag_family) | |
834 | goto next_normal; | |
c720c7e8 | 835 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 836 | r->id.idiag_sport) |
1da177e4 | 837 | goto next_normal; |
c720c7e8 | 838 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 839 | r->id.idiag_dport) |
1da177e4 | 840 | goto next_normal; |
25c4cd2b | 841 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
7e3aab4a | 842 | spin_unlock_bh(lock); |
1da177e4 LT |
843 | goto done; |
844 | } | |
845 | next_normal: | |
846 | ++num; | |
847 | } | |
848 | ||
73c1f4a0 | 849 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
850 | struct inet_timewait_sock *tw; |
851 | ||
852 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 853 | &head->twchain) { |
1da177e4 LT |
854 | |
855 | if (num < s_num) | |
856 | goto next_dying; | |
d23deaa0 PE |
857 | if (r->sdiag_family != AF_UNSPEC && |
858 | tw->tw_family != r->sdiag_family) | |
859 | goto next_dying; | |
7dbf0755 | 860 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 861 | r->id.idiag_sport) |
1da177e4 | 862 | goto next_dying; |
7dbf0755 | 863 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 864 | r->id.idiag_dport) |
1da177e4 | 865 | goto next_dying; |
25c4cd2b | 866 | if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) { |
7e3aab4a | 867 | spin_unlock_bh(lock); |
1da177e4 LT |
868 | goto done; |
869 | } | |
870 | next_dying: | |
871 | ++num; | |
872 | } | |
873 | } | |
7e3aab4a | 874 | spin_unlock_bh(lock); |
1da177e4 LT |
875 | } |
876 | ||
877 | done: | |
878 | cb->args[1] = i; | |
879 | cb->args[2] = num; | |
efb3cb42 PE |
880 | out: |
881 | ; | |
882 | } | |
1942c518 | 883 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
884 | |
885 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
886 | struct inet_diag_req *r, struct nlattr *bc) | |
887 | { | |
888 | const struct inet_diag_handler *handler; | |
889 | ||
890 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
891 | if (!IS_ERR(handler)) | |
1942c518 | 892 | handler->dump(skb, cb, r, bc); |
d523a328 | 893 | inet_diag_unlock_handler(handler); |
efb3cb42 | 894 | |
1da177e4 LT |
895 | return skb->len; |
896 | } | |
897 | ||
25c4cd2b PE |
898 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
899 | { | |
900 | struct nlattr *bc = NULL; | |
901 | int hdrlen = sizeof(struct inet_diag_req); | |
902 | ||
903 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
904 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
905 | ||
906 | return __inet_diag_dump(skb, cb, (struct inet_diag_req *)NLMSG_DATA(cb->nlh), bc); | |
907 | } | |
908 | ||
a029fe26 PE |
909 | static inline int inet_diag_type2proto(int type) |
910 | { | |
911 | switch (type) { | |
912 | case TCPDIAG_GETSOCK: | |
913 | return IPPROTO_TCP; | |
914 | case DCCPDIAG_GETSOCK: | |
915 | return IPPROTO_DCCP; | |
916 | default: | |
917 | return 0; | |
918 | } | |
919 | } | |
920 | ||
25c4cd2b PE |
921 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
922 | { | |
923 | struct inet_diag_req_compat *rc = NLMSG_DATA(cb->nlh); | |
924 | struct inet_diag_req req; | |
925 | struct nlattr *bc = NULL; | |
926 | int hdrlen = sizeof(struct inet_diag_req_compat); | |
927 | ||
d23deaa0 | 928 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
929 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
930 | req.idiag_ext = rc->idiag_ext; | |
931 | req.idiag_states = rc->idiag_states; | |
932 | req.id = rc->id; | |
933 | ||
934 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
935 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
936 | ||
937 | return __inet_diag_dump(skb, cb, &req, bc); | |
938 | } | |
939 | ||
fe50ce28 PE |
940 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
941 | const struct nlmsghdr *nlh) | |
942 | { | |
943 | struct inet_diag_req_compat *rc = NLMSG_DATA(nlh); | |
944 | struct inet_diag_req req; | |
945 | ||
946 | req.sdiag_family = rc->idiag_family; | |
947 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
948 | req.idiag_ext = rc->idiag_ext; | |
949 | req.idiag_states = rc->idiag_states; | |
950 | req.id = rc->id; | |
951 | ||
952 | return inet_diag_get_exact(in_skb, nlh, &req); | |
953 | } | |
954 | ||
8d34172d | 955 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 956 | { |
126fdc32 | 957 | int hdrlen = sizeof(struct inet_diag_req_compat); |
1da177e4 | 958 | |
ead592ba TG |
959 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
960 | nlmsg_len(nlh) < hdrlen) | |
961 | return -EINVAL; | |
1da177e4 | 962 | |
b8f3ab42 | 963 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
964 | if (nlmsg_attrlen(nlh, hdrlen)) { |
965 | struct nlattr *attr; | |
1da177e4 | 966 | |
ead592ba TG |
967 | attr = nlmsg_find_attr(nlh, hdrlen, |
968 | INET_DIAG_REQ_BYTECODE); | |
969 | if (attr == NULL || | |
970 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
971 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
972 | return -EINVAL; | |
973 | } | |
1da177e4 | 974 | |
8ef874bf | 975 | return netlink_dump_start(sock_diag_nlsk, skb, nlh, |
25c4cd2b | 976 | inet_diag_dump_compat, NULL, 0); |
1da177e4 | 977 | } |
ead592ba | 978 | |
fe50ce28 | 979 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
980 | } |
981 | ||
d366477a PE |
982 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
983 | { | |
984 | int hdrlen = sizeof(struct inet_diag_req); | |
985 | ||
986 | if (nlmsg_len(h) < hdrlen) | |
987 | return -EINVAL; | |
988 | ||
989 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
990 | if (nlmsg_attrlen(h, hdrlen)) { |
991 | struct nlattr *attr; | |
992 | attr = nlmsg_find_attr(h, hdrlen, | |
993 | INET_DIAG_REQ_BYTECODE); | |
994 | if (attr == NULL || | |
995 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
996 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
997 | return -EINVAL; | |
998 | } | |
999 | ||
8ef874bf | 1000 | return netlink_dump_start(sock_diag_nlsk, skb, h, |
25c4cd2b | 1001 | inet_diag_dump, NULL, 0); |
d366477a PE |
1002 | } |
1003 | ||
fe50ce28 | 1004 | return inet_diag_get_exact(skb, h, (struct inet_diag_req *)NLMSG_DATA(h)); |
d366477a PE |
1005 | } |
1006 | ||
1007 | static struct sock_diag_handler inet_diag_handler = { | |
1008 | .family = AF_INET, | |
1009 | .dump = inet_diag_handler_dump, | |
1010 | }; | |
1011 | ||
1012 | static struct sock_diag_handler inet6_diag_handler = { | |
1013 | .family = AF_INET6, | |
1014 | .dump = inet_diag_handler_dump, | |
1015 | }; | |
1016 | ||
4f5736c4 ACM |
1017 | int inet_diag_register(const struct inet_diag_handler *h) |
1018 | { | |
1019 | const __u16 type = h->idiag_type; | |
1020 | int err = -EINVAL; | |
1021 | ||
f13c95f0 | 1022 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1023 | goto out; |
1024 | ||
d523a328 | 1025 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1026 | err = -EEXIST; |
1027 | if (inet_diag_table[type] == NULL) { | |
1028 | inet_diag_table[type] = h; | |
1029 | err = 0; | |
1030 | } | |
d523a328 | 1031 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1032 | out: |
1033 | return err; | |
1034 | } | |
1035 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1036 | ||
1037 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1038 | { | |
1039 | const __u16 type = h->idiag_type; | |
1040 | ||
f13c95f0 | 1041 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1042 | return; |
1043 | ||
d523a328 | 1044 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1045 | inet_diag_table[type] = NULL; |
d523a328 | 1046 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1047 | } |
1048 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1049 | ||
73c1f4a0 | 1050 | static int __init inet_diag_init(void) |
1da177e4 | 1051 | { |
f13c95f0 | 1052 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1053 | sizeof(struct inet_diag_handler *)); |
1054 | int err = -ENOMEM; | |
1055 | ||
0da974f4 | 1056 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1057 | if (!inet_diag_table) |
1058 | goto out; | |
1059 | ||
d366477a PE |
1060 | err = sock_diag_register(&inet_diag_handler); |
1061 | if (err) | |
1062 | goto out_free_nl; | |
1063 | ||
1064 | err = sock_diag_register(&inet6_diag_handler); | |
1065 | if (err) | |
1066 | goto out_free_inet; | |
1067 | ||
8ef874bf | 1068 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1069 | out: |
1070 | return err; | |
d366477a PE |
1071 | |
1072 | out_free_inet: | |
1073 | sock_diag_unregister(&inet_diag_handler); | |
1074 | out_free_nl: | |
4f5736c4 ACM |
1075 | kfree(inet_diag_table); |
1076 | goto out; | |
1da177e4 LT |
1077 | } |
1078 | ||
73c1f4a0 | 1079 | static void __exit inet_diag_exit(void) |
1da177e4 | 1080 | { |
d366477a PE |
1081 | sock_diag_unregister(&inet6_diag_handler); |
1082 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1083 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1084 | kfree(inet_diag_table); |
1da177e4 LT |
1085 | } |
1086 | ||
73c1f4a0 ACM |
1087 | module_init(inet_diag_init); |
1088 | module_exit(inet_diag_exit); | |
1da177e4 | 1089 | MODULE_LICENSE("GPL"); |
8ef874bf | 1090 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 0); |