]>
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 | ||
d523a328 HX |
49 | static DEFINE_MUTEX(inet_diag_table_mutex); |
50 | ||
f13c95f0 | 51 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 52 | { |
f13c95f0 | 53 | if (!inet_diag_table[proto]) |
aec8dc62 PE |
54 | request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK, |
55 | NETLINK_SOCK_DIAG, AF_INET, proto); | |
d523a328 HX |
56 | |
57 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 58 | if (!inet_diag_table[proto]) |
d523a328 HX |
59 | return ERR_PTR(-ENOENT); |
60 | ||
f13c95f0 | 61 | return inet_diag_table[proto]; |
d523a328 HX |
62 | } |
63 | ||
64 | static inline void inet_diag_unlock_handler( | |
65 | const struct inet_diag_handler *handler) | |
66 | { | |
67 | mutex_unlock(&inet_diag_table_mutex); | |
68 | } | |
69 | ||
3c4d05c8 | 70 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
c8991362 | 71 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
a029fe26 | 72 | u32 pid, u32 seq, u16 nlmsg_flags, |
dff2c035 | 73 | const struct nlmsghdr *unlh) |
1da177e4 | 74 | { |
463c84b9 | 75 | const struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 76 | struct inet_diag_msg *r; |
1da177e4 | 77 | struct nlmsghdr *nlh; |
6e277ed5 | 78 | struct nlattr *attr; |
4f5736c4 | 79 | void *info = NULL; |
4f5736c4 | 80 | const struct inet_diag_handler *handler; |
a029fe26 | 81 | int ext = req->idiag_ext; |
4f5736c4 | 82 | |
a029fe26 | 83 | handler = inet_diag_table[req->sdiag_protocol]; |
4f5736c4 | 84 | BUG_ON(handler == NULL); |
1da177e4 | 85 | |
6e277ed5 TG |
86 | nlh = nlmsg_put(skb, pid, seq, unlh->nlmsg_type, sizeof(*r), |
87 | nlmsg_flags); | |
88 | if (!nlh) | |
d106352d | 89 | return -EMSGSIZE; |
4f5736c4 | 90 | |
d106352d | 91 | r = nlmsg_data(nlh); |
c7d58aab ACM |
92 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
93 | ||
73c1f4a0 ACM |
94 | r->idiag_family = sk->sk_family; |
95 | r->idiag_state = sk->sk_state; | |
96 | r->idiag_timer = 0; | |
97 | r->idiag_retrans = 0; | |
1da177e4 | 98 | |
73c1f4a0 | 99 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 100 | sock_diag_save_cookie(sk, r->id.idiag_cookie); |
1da177e4 | 101 | |
c720c7e8 ED |
102 | r->id.idiag_sport = inet->inet_sport; |
103 | r->id.idiag_dport = inet->inet_dport; | |
104 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
105 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 106 | |
717b6d83 MŻ |
107 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
108 | * hence this needs to be included regardless of socket family. | |
109 | */ | |
110 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
6e277ed5 TG |
111 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
112 | goto errout; | |
717b6d83 | 113 | |
dfd56b8b | 114 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 115 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 116 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 117 | |
4e3fd7a0 AD |
118 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
119 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
6e277ed5 | 120 | |
06236ac3 | 121 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
6e277ed5 TG |
122 | if (nla_put_u8(skb, INET_DIAG_TCLASS, np->tclass) < 0) |
123 | goto errout; | |
1da177e4 LT |
124 | } |
125 | #endif | |
126 | ||
3c4d05c8 PE |
127 | r->idiag_uid = sock_i_uid(sk); |
128 | r->idiag_inode = sock_i_ino(sk); | |
129 | ||
6e277ed5 TG |
130 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
131 | struct inet_diag_meminfo minfo = { | |
132 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
133 | .idiag_wmem = sk->sk_wmem_queued, | |
134 | .idiag_fmem = sk->sk_forward_alloc, | |
135 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
136 | }; | |
137 | ||
138 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
139 | goto errout; | |
3c4d05c8 PE |
140 | } |
141 | ||
c0636faa PE |
142 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
143 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 144 | goto errout; |
c0636faa | 145 | |
3c4d05c8 | 146 | if (icsk == NULL) { |
62ad6fcd | 147 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
148 | goto out; |
149 | } | |
150 | ||
172589cc | 151 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 152 | |
463c84b9 | 153 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
154 | r->idiag_timer = 1; |
155 | r->idiag_retrans = icsk->icsk_retransmits; | |
156 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 157 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
158 | r->idiag_timer = 4; |
159 | r->idiag_retrans = icsk->icsk_probes_out; | |
160 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 161 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
162 | r->idiag_timer = 2; |
163 | r->idiag_retrans = icsk->icsk_probes_out; | |
164 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 165 | } else { |
73c1f4a0 ACM |
166 | r->idiag_timer = 0; |
167 | r->idiag_expires = 0; | |
1da177e4 LT |
168 | } |
169 | #undef EXPIRES_IN_MS | |
540722ff | 170 | |
6e277ed5 TG |
171 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
172 | attr = nla_reserve(skb, INET_DIAG_INFO, | |
173 | sizeof(struct tcp_info)); | |
174 | if (!attr) | |
175 | goto errout; | |
3c4d05c8 | 176 | |
6e277ed5 | 177 | info = nla_data(attr); |
1da177e4 LT |
178 | } |
179 | ||
6e277ed5 TG |
180 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
181 | if (nla_put_string(skb, INET_DIAG_CONG, | |
182 | icsk->icsk_ca_ops->name) < 0) | |
183 | goto errout; | |
184 | ||
4f5736c4 | 185 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 186 | |
6687e988 ACM |
187 | if (sk->sk_state < TCP_TIME_WAIT && |
188 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
189 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 190 | |
3c4d05c8 | 191 | out: |
6e277ed5 | 192 | return nlmsg_end(skb, nlh); |
1da177e4 | 193 | |
6e277ed5 TG |
194 | errout: |
195 | nlmsg_cancel(skb, nlh); | |
26932566 | 196 | return -EMSGSIZE; |
1da177e4 | 197 | } |
3c4d05c8 PE |
198 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
199 | ||
200 | static int inet_csk_diag_fill(struct sock *sk, | |
c8991362 | 201 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
3c4d05c8 PE |
202 | u32 pid, u32 seq, u16 nlmsg_flags, |
203 | const struct nlmsghdr *unlh) | |
204 | { | |
205 | return inet_sk_diag_fill(sk, inet_csk(sk), | |
206 | skb, req, pid, seq, nlmsg_flags, unlh); | |
207 | } | |
1da177e4 | 208 | |
c7d58aab | 209 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
c8991362 | 210 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
a029fe26 | 211 | u32 pid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
212 | const struct nlmsghdr *unlh) |
213 | { | |
214 | long tmo; | |
215 | struct inet_diag_msg *r; | |
6e277ed5 | 216 | struct nlmsghdr *nlh; |
d106352d | 217 | |
6e277ed5 TG |
218 | nlh = nlmsg_put(skb, pid, seq, unlh->nlmsg_type, sizeof(*r), |
219 | nlmsg_flags); | |
220 | if (!nlh) | |
d106352d | 221 | return -EMSGSIZE; |
c7d58aab | 222 | |
d106352d | 223 | r = nlmsg_data(nlh); |
c7d58aab ACM |
224 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
225 | ||
c7d58aab ACM |
226 | tmo = tw->tw_ttd - jiffies; |
227 | if (tmo < 0) | |
228 | tmo = 0; | |
229 | ||
230 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
231 | r->idiag_retrans = 0; |
232 | r->id.idiag_if = tw->tw_bound_dev_if; | |
f65c1b53 | 233 | sock_diag_save_cookie(tw, r->id.idiag_cookie); |
c7d58aab ACM |
234 | r->id.idiag_sport = tw->tw_sport; |
235 | r->id.idiag_dport = tw->tw_dport; | |
236 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
237 | r->id.idiag_dst[0] = tw->tw_daddr; | |
238 | r->idiag_state = tw->tw_substate; | |
239 | r->idiag_timer = 3; | |
172589cc | 240 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
241 | r->idiag_rqueue = 0; |
242 | r->idiag_wqueue = 0; | |
243 | r->idiag_uid = 0; | |
244 | r->idiag_inode = 0; | |
dfd56b8b | 245 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
246 | if (tw->tw_family == AF_INET6) { |
247 | const struct inet6_timewait_sock *tw6 = | |
248 | inet6_twsk((struct sock *)tw); | |
249 | ||
4e3fd7a0 AD |
250 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
251 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
252 | } |
253 | #endif | |
6e277ed5 TG |
254 | |
255 | return nlmsg_end(skb, nlh); | |
c7d58aab ACM |
256 | } |
257 | ||
dff2c035 | 258 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
c8991362 | 259 | struct inet_diag_req_v2 *r, u32 pid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
260 | const struct nlmsghdr *unlh) |
261 | { | |
262 | if (sk->sk_state == TCP_TIME_WAIT) | |
263 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
a029fe26 | 264 | skb, r, pid, seq, nlmsg_flags, |
dff2c035 | 265 | unlh); |
a029fe26 | 266 | return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh); |
dff2c035 ACM |
267 | } |
268 | ||
1942c518 | 269 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
c8991362 | 270 | const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req) |
1da177e4 LT |
271 | { |
272 | int err; | |
273 | struct sock *sk; | |
1da177e4 | 274 | struct sk_buff *rep; |
d523a328 | 275 | |
d523a328 | 276 | err = -EINVAL; |
fe50ce28 | 277 | if (req->sdiag_family == AF_INET) { |
c67499c0 | 278 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
279 | req->id.idiag_dport, req->id.idiag_src[0], |
280 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 281 | } |
dfd56b8b | 282 | #if IS_ENABLED(CONFIG_IPV6) |
fe50ce28 | 283 | else if (req->sdiag_family == AF_INET6) { |
d86e0dac | 284 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
285 | (struct in6_addr *)req->id.idiag_dst, |
286 | req->id.idiag_dport, | |
287 | (struct in6_addr *)req->id.idiag_src, | |
288 | req->id.idiag_sport, | |
289 | req->id.idiag_if); | |
1da177e4 LT |
290 | } |
291 | #endif | |
292 | else { | |
476f7dbf | 293 | goto out_nosk; |
1da177e4 LT |
294 | } |
295 | ||
d523a328 | 296 | err = -ENOENT; |
1da177e4 | 297 | if (sk == NULL) |
476f7dbf | 298 | goto out_nosk; |
1da177e4 | 299 | |
f65c1b53 | 300 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 301 | if (err) |
1da177e4 LT |
302 | goto out; |
303 | ||
6e277ed5 TG |
304 | rep = nlmsg_new(sizeof(struct inet_diag_msg) + |
305 | sizeof(struct inet_diag_meminfo) + | |
306 | sizeof(struct tcp_info) + 64, GFP_KERNEL); | |
307 | if (!rep) { | |
308 | err = -ENOMEM; | |
1da177e4 | 309 | goto out; |
6e277ed5 | 310 | } |
1da177e4 | 311 | |
a029fe26 | 312 | err = sk_diag_fill(sk, rep, req, |
26932566 PM |
313 | NETLINK_CB(in_skb).pid, |
314 | nlh->nlmsg_seq, 0, nlh); | |
315 | if (err < 0) { | |
316 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 317 | nlmsg_free(rep); |
26932566 PM |
318 | goto out; |
319 | } | |
8ef874bf | 320 | err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid, |
73c1f4a0 | 321 | MSG_DONTWAIT); |
1da177e4 LT |
322 | if (err > 0) |
323 | err = 0; | |
324 | ||
325 | out: | |
326 | if (sk) { | |
327 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 328 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
329 | else |
330 | sock_put(sk); | |
331 | } | |
476f7dbf PE |
332 | out_nosk: |
333 | return err; | |
334 | } | |
1942c518 | 335 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
336 | |
337 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
338 | const struct nlmsghdr *nlh, | |
c8991362 | 339 | struct inet_diag_req_v2 *req) |
476f7dbf PE |
340 | { |
341 | const struct inet_diag_handler *handler; | |
342 | int err; | |
343 | ||
344 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
345 | if (IS_ERR(handler)) | |
346 | err = PTR_ERR(handler); | |
347 | else | |
1942c518 | 348 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 349 | inet_diag_unlock_handler(handler); |
476f7dbf | 350 | |
1da177e4 LT |
351 | return err; |
352 | } | |
353 | ||
9f855299 | 354 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
355 | { |
356 | int words = bits >> 5; | |
357 | ||
358 | bits &= 0x1f; | |
359 | ||
360 | if (words) { | |
361 | if (memcmp(a1, a2, words << 2)) | |
362 | return 0; | |
363 | } | |
364 | if (bits) { | |
9f855299 AV |
365 | __be32 w1, w2; |
366 | __be32 mask; | |
1da177e4 LT |
367 | |
368 | w1 = a1[words]; | |
369 | w2 = a2[words]; | |
370 | ||
371 | mask = htonl((0xffffffff) << (32 - bits)); | |
372 | ||
373 | if ((w1 ^ w2) & mask) | |
374 | return 0; | |
375 | } | |
376 | ||
377 | return 1; | |
378 | } | |
379 | ||
380 | ||
87c22ea5 PE |
381 | static int inet_diag_bc_run(const struct nlattr *_bc, |
382 | const struct inet_diag_entry *entry) | |
1da177e4 | 383 | { |
87c22ea5 PE |
384 | const void *bc = nla_data(_bc); |
385 | int len = nla_len(_bc); | |
386 | ||
1da177e4 LT |
387 | while (len > 0) { |
388 | int yes = 1; | |
73c1f4a0 | 389 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
390 | |
391 | switch (op->code) { | |
73c1f4a0 | 392 | case INET_DIAG_BC_NOP: |
1da177e4 | 393 | break; |
73c1f4a0 | 394 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
395 | yes = 0; |
396 | break; | |
73c1f4a0 | 397 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
398 | yes = entry->sport >= op[1].no; |
399 | break; | |
73c1f4a0 | 400 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 401 | yes = entry->sport <= op[1].no; |
1da177e4 | 402 | break; |
73c1f4a0 | 403 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
404 | yes = entry->dport >= op[1].no; |
405 | break; | |
73c1f4a0 | 406 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
407 | yes = entry->dport <= op[1].no; |
408 | break; | |
73c1f4a0 | 409 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
410 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
411 | break; | |
73c1f4a0 | 412 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
413 | case INET_DIAG_BC_D_COND: { |
414 | struct inet_diag_hostcond *cond; | |
9f855299 | 415 | __be32 *addr; |
1da177e4 | 416 | |
a8c2190e | 417 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 418 | if (cond->port != -1 && |
73c1f4a0 | 419 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
420 | entry->sport : entry->dport)) { |
421 | yes = 0; | |
422 | break; | |
423 | } | |
4e852c02 | 424 | |
1da177e4 LT |
425 | if (cond->prefix_len == 0) |
426 | break; | |
427 | ||
73c1f4a0 | 428 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
429 | addr = entry->saddr; |
430 | else | |
431 | addr = entry->daddr; | |
432 | ||
4e852c02 ACM |
433 | if (bitstring_match(addr, cond->addr, |
434 | cond->prefix_len)) | |
1da177e4 LT |
435 | break; |
436 | if (entry->family == AF_INET6 && | |
437 | cond->family == AF_INET) { | |
438 | if (addr[0] == 0 && addr[1] == 0 && | |
439 | addr[2] == htonl(0xffff) && | |
a8c2190e | 440 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 441 | cond->prefix_len)) |
1da177e4 LT |
442 | break; |
443 | } | |
444 | yes = 0; | |
445 | break; | |
446 | } | |
447 | } | |
448 | ||
4e852c02 | 449 | if (yes) { |
1da177e4 LT |
450 | len -= op->yes; |
451 | bc += op->yes; | |
452 | } else { | |
453 | len -= op->no; | |
454 | bc += op->no; | |
455 | } | |
456 | } | |
a02cec21 | 457 | return len == 0; |
1da177e4 LT |
458 | } |
459 | ||
8d07d151 PE |
460 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
461 | { | |
462 | struct inet_diag_entry entry; | |
463 | struct inet_sock *inet = inet_sk(sk); | |
464 | ||
465 | if (bc == NULL) | |
466 | return 1; | |
467 | ||
468 | entry.family = sk->sk_family; | |
dfd56b8b | 469 | #if IS_ENABLED(CONFIG_IPV6) |
8d07d151 PE |
470 | if (entry.family == AF_INET6) { |
471 | struct ipv6_pinfo *np = inet6_sk(sk); | |
472 | ||
473 | entry.saddr = np->rcv_saddr.s6_addr32; | |
474 | entry.daddr = np->daddr.s6_addr32; | |
475 | } else | |
476 | #endif | |
477 | { | |
478 | entry.saddr = &inet->inet_rcv_saddr; | |
479 | entry.daddr = &inet->inet_daddr; | |
480 | } | |
481 | entry.sport = inet->inet_num; | |
482 | entry.dport = ntohs(inet->inet_dport); | |
483 | entry.userlocks = sk->sk_userlocks; | |
484 | ||
485 | return inet_diag_bc_run(bc, &entry); | |
486 | } | |
487 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
488 | ||
1da177e4 LT |
489 | static int valid_cc(const void *bc, int len, int cc) |
490 | { | |
491 | while (len >= 0) { | |
73c1f4a0 | 492 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
493 | |
494 | if (cc > len) | |
495 | return 0; | |
496 | if (cc == len) | |
497 | return 1; | |
eeb14972 | 498 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
499 | return 0; |
500 | len -= op->yes; | |
501 | bc += op->yes; | |
502 | } | |
503 | return 0; | |
504 | } | |
505 | ||
73c1f4a0 | 506 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 507 | { |
eeb14972 | 508 | const void *bc = bytecode; |
1da177e4 LT |
509 | int len = bytecode_len; |
510 | ||
511 | while (len > 0) { | |
eeb14972 | 512 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
513 | |
514 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
515 | switch (op->code) { | |
73c1f4a0 ACM |
516 | case INET_DIAG_BC_AUTO: |
517 | case INET_DIAG_BC_S_COND: | |
518 | case INET_DIAG_BC_D_COND: | |
519 | case INET_DIAG_BC_S_GE: | |
520 | case INET_DIAG_BC_S_LE: | |
521 | case INET_DIAG_BC_D_GE: | |
522 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 523 | case INET_DIAG_BC_JMP: |
eeb14972 | 524 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
525 | return -EINVAL; |
526 | if (op->no < len && | |
a8c2190e | 527 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
528 | return -EINVAL; |
529 | break; | |
73c1f4a0 | 530 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
531 | break; |
532 | default: | |
533 | return -EINVAL; | |
534 | } | |
eeb14972 ED |
535 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
536 | return -EINVAL; | |
4e852c02 | 537 | bc += op->yes; |
1da177e4 LT |
538 | len -= op->yes; |
539 | } | |
540 | return len == 0 ? 0 : -EINVAL; | |
541 | } | |
542 | ||
dff2c035 ACM |
543 | static int inet_csk_diag_dump(struct sock *sk, |
544 | struct sk_buff *skb, | |
37f352b5 | 545 | struct netlink_callback *cb, |
c8991362 | 546 | struct inet_diag_req_v2 *r, |
37f352b5 | 547 | const struct nlattr *bc) |
1da177e4 | 548 | { |
8d07d151 PE |
549 | if (!inet_diag_bc_sk(bc, sk)) |
550 | return 0; | |
1da177e4 | 551 | |
a029fe26 | 552 | return inet_csk_diag_fill(sk, skb, r, |
dff2c035 ACM |
553 | NETLINK_CB(cb->skb).pid, |
554 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
555 | } |
556 | ||
c7d58aab ACM |
557 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
558 | struct sk_buff *skb, | |
37f352b5 | 559 | struct netlink_callback *cb, |
c8991362 | 560 | struct inet_diag_req_v2 *r, |
37f352b5 | 561 | const struct nlattr *bc) |
c7d58aab | 562 | { |
37f352b5 | 563 | if (bc != NULL) { |
c7d58aab | 564 | struct inet_diag_entry entry; |
c7d58aab ACM |
565 | |
566 | entry.family = tw->tw_family; | |
dfd56b8b | 567 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
568 | if (tw->tw_family == AF_INET6) { |
569 | struct inet6_timewait_sock *tw6 = | |
570 | inet6_twsk((struct sock *)tw); | |
571 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
572 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
573 | } else | |
574 | #endif | |
575 | { | |
576 | entry.saddr = &tw->tw_rcv_saddr; | |
577 | entry.daddr = &tw->tw_daddr; | |
578 | } | |
579 | entry.sport = tw->tw_num; | |
580 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 581 | entry.userlocks = 0; |
c7d58aab | 582 | |
87c22ea5 | 583 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
584 | return 0; |
585 | } | |
586 | ||
a029fe26 | 587 | return inet_twsk_diag_fill(tw, skb, r, |
c7d58aab ACM |
588 | NETLINK_CB(cb->skb).pid, |
589 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
590 | } | |
591 | ||
73c1f4a0 | 592 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
593 | struct request_sock *req, u32 pid, u32 seq, |
594 | const struct nlmsghdr *unlh) | |
1da177e4 | 595 | { |
2e6599cb | 596 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 597 | struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 598 | struct inet_diag_msg *r; |
1da177e4 LT |
599 | struct nlmsghdr *nlh; |
600 | long tmo; | |
601 | ||
6e277ed5 TG |
602 | nlh = nlmsg_put(skb, pid, seq, unlh->nlmsg_type, sizeof(*r), |
603 | NLM_F_MULTI); | |
604 | if (!nlh) | |
605 | return -EMSGSIZE; | |
1da177e4 | 606 | |
6e277ed5 | 607 | r = nlmsg_data(nlh); |
73c1f4a0 ACM |
608 | r->idiag_family = sk->sk_family; |
609 | r->idiag_state = TCP_SYN_RECV; | |
610 | r->idiag_timer = 1; | |
611 | r->idiag_retrans = req->retrans; | |
1da177e4 | 612 | |
73c1f4a0 | 613 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 614 | sock_diag_save_cookie(req, r->id.idiag_cookie); |
1da177e4 LT |
615 | |
616 | tmo = req->expires - jiffies; | |
617 | if (tmo < 0) | |
618 | tmo = 0; | |
619 | ||
c720c7e8 | 620 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
621 | r->id.idiag_dport = ireq->rmt_port; |
622 | r->id.idiag_src[0] = ireq->loc_addr; | |
623 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
624 | r->idiag_expires = jiffies_to_msecs(tmo); | |
625 | r->idiag_rqueue = 0; | |
626 | r->idiag_wqueue = 0; | |
627 | r->idiag_uid = sock_i_uid(sk); | |
628 | r->idiag_inode = 0; | |
dfd56b8b | 629 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 630 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
631 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
632 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
633 | } |
634 | #endif | |
1da177e4 | 635 | |
6e277ed5 | 636 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
637 | } |
638 | ||
73c1f4a0 | 639 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 640 | struct netlink_callback *cb, |
c8991362 | 641 | struct inet_diag_req_v2 *r, |
37f352b5 | 642 | const struct nlattr *bc) |
1da177e4 | 643 | { |
73c1f4a0 | 644 | struct inet_diag_entry entry; |
463c84b9 | 645 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 646 | struct listen_sock *lopt; |
1da177e4 LT |
647 | struct inet_sock *inet = inet_sk(sk); |
648 | int j, s_j; | |
649 | int reqnum, s_reqnum; | |
650 | int err = 0; | |
651 | ||
652 | s_j = cb->args[3]; | |
653 | s_reqnum = cb->args[4]; | |
654 | ||
655 | if (s_j > 0) | |
656 | s_j--; | |
657 | ||
658 | entry.family = sk->sk_family; | |
659 | ||
463c84b9 | 660 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 661 | |
463c84b9 | 662 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
663 | if (!lopt || !lopt->qlen) |
664 | goto out; | |
665 | ||
37f352b5 | 666 | if (bc != NULL) { |
c720c7e8 | 667 | entry.sport = inet->inet_num; |
1da177e4 LT |
668 | entry.userlocks = sk->sk_userlocks; |
669 | } | |
670 | ||
540722ff | 671 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 672 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
673 | |
674 | reqnum = 0; | |
675 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
676 | struct inet_request_sock *ireq = inet_rsk(req); |
677 | ||
1da177e4 LT |
678 | if (reqnum < s_reqnum) |
679 | continue; | |
73c1f4a0 ACM |
680 | if (r->id.idiag_dport != ireq->rmt_port && |
681 | r->id.idiag_dport) | |
1da177e4 LT |
682 | continue; |
683 | ||
684 | if (bc) { | |
685 | entry.saddr = | |
dfd56b8b | 686 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 687 | (entry.family == AF_INET6) ? |
ca304b61 | 688 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 689 | #endif |
2e6599cb | 690 | &ireq->loc_addr; |
4e852c02 | 691 | entry.daddr = |
dfd56b8b | 692 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 693 | (entry.family == AF_INET6) ? |
ca304b61 | 694 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 695 | #endif |
2e6599cb ACM |
696 | &ireq->rmt_addr; |
697 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 698 | |
87c22ea5 | 699 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
700 | continue; |
701 | } | |
702 | ||
73c1f4a0 | 703 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 704 | NETLINK_CB(cb->skb).pid, |
540722ff | 705 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
706 | if (err < 0) { |
707 | cb->args[3] = j + 1; | |
708 | cb->args[4] = reqnum; | |
709 | goto out; | |
710 | } | |
711 | } | |
712 | ||
713 | s_reqnum = 0; | |
714 | } | |
715 | ||
716 | out: | |
463c84b9 | 717 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
718 | |
719 | return err; | |
720 | } | |
721 | ||
1942c518 | 722 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
c8991362 | 723 | struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 LT |
724 | { |
725 | int i, num; | |
726 | int s_i, s_num; | |
4e852c02 | 727 | |
1da177e4 LT |
728 | s_i = cb->args[1]; |
729 | s_num = num = cb->args[2]; | |
4f5736c4 | 730 | |
1da177e4 | 731 | if (cb->args[0] == 0) { |
73c1f4a0 | 732 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 733 | goto skip_listen_ht; |
540722ff | 734 | |
0f7ff927 | 735 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 736 | struct sock *sk; |
c25eb3bf | 737 | struct hlist_nulls_node *node; |
5caea4ea | 738 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
739 | |
740 | num = 0; | |
5caea4ea ED |
741 | ilb = &hashinfo->listening_hash[i]; |
742 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 743 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
744 | struct inet_sock *inet = inet_sk(sk); |
745 | ||
746 | if (num < s_num) { | |
747 | num++; | |
748 | continue; | |
749 | } | |
750 | ||
d23deaa0 PE |
751 | if (r->sdiag_family != AF_UNSPEC && |
752 | sk->sk_family != r->sdiag_family) | |
753 | goto next_listen; | |
754 | ||
c720c7e8 | 755 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 756 | r->id.idiag_sport) |
1da177e4 LT |
757 | goto next_listen; |
758 | ||
73c1f4a0 ACM |
759 | if (!(r->idiag_states & TCPF_LISTEN) || |
760 | r->id.idiag_dport || | |
1da177e4 LT |
761 | cb->args[3] > 0) |
762 | goto syn_recv; | |
763 | ||
25c4cd2b | 764 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 765 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
766 | goto done; |
767 | } | |
768 | ||
769 | syn_recv: | |
73c1f4a0 | 770 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
771 | goto next_listen; |
772 | ||
25c4cd2b | 773 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 774 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
775 | goto done; |
776 | } | |
777 | ||
778 | next_listen: | |
779 | cb->args[3] = 0; | |
780 | cb->args[4] = 0; | |
781 | ++num; | |
782 | } | |
5caea4ea | 783 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
784 | |
785 | s_num = 0; | |
786 | cb->args[3] = 0; | |
787 | cb->args[4] = 0; | |
788 | } | |
1da177e4 LT |
789 | skip_listen_ht: |
790 | cb->args[0] = 1; | |
791 | s_i = num = s_num = 0; | |
792 | } | |
793 | ||
73c1f4a0 | 794 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 795 | goto out; |
1da177e4 | 796 | |
f373b53b | 797 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 798 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 799 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 800 | struct sock *sk; |
3ab5aee7 | 801 | struct hlist_nulls_node *node; |
1da177e4 | 802 | |
6be547a6 AK |
803 | num = 0; |
804 | ||
3ab5aee7 ED |
805 | if (hlist_nulls_empty(&head->chain) && |
806 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
807 | continue; |
808 | ||
1da177e4 LT |
809 | if (i > s_i) |
810 | s_num = 0; | |
811 | ||
7e3aab4a | 812 | spin_lock_bh(lock); |
3ab5aee7 | 813 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
814 | struct inet_sock *inet = inet_sk(sk); |
815 | ||
816 | if (num < s_num) | |
817 | goto next_normal; | |
73c1f4a0 | 818 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 819 | goto next_normal; |
d23deaa0 PE |
820 | if (r->sdiag_family != AF_UNSPEC && |
821 | sk->sk_family != r->sdiag_family) | |
822 | goto next_normal; | |
c720c7e8 | 823 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 824 | r->id.idiag_sport) |
1da177e4 | 825 | goto next_normal; |
c720c7e8 | 826 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 827 | r->id.idiag_dport) |
1da177e4 | 828 | goto next_normal; |
25c4cd2b | 829 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
7e3aab4a | 830 | spin_unlock_bh(lock); |
1da177e4 LT |
831 | goto done; |
832 | } | |
833 | next_normal: | |
834 | ++num; | |
835 | } | |
836 | ||
73c1f4a0 | 837 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
838 | struct inet_timewait_sock *tw; |
839 | ||
840 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 841 | &head->twchain) { |
1da177e4 LT |
842 | |
843 | if (num < s_num) | |
844 | goto next_dying; | |
d23deaa0 PE |
845 | if (r->sdiag_family != AF_UNSPEC && |
846 | tw->tw_family != r->sdiag_family) | |
847 | goto next_dying; | |
7dbf0755 | 848 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 849 | r->id.idiag_sport) |
1da177e4 | 850 | goto next_dying; |
7dbf0755 | 851 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 852 | r->id.idiag_dport) |
1da177e4 | 853 | goto next_dying; |
25c4cd2b | 854 | if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) { |
7e3aab4a | 855 | spin_unlock_bh(lock); |
1da177e4 LT |
856 | goto done; |
857 | } | |
858 | next_dying: | |
859 | ++num; | |
860 | } | |
861 | } | |
7e3aab4a | 862 | spin_unlock_bh(lock); |
1da177e4 LT |
863 | } |
864 | ||
865 | done: | |
866 | cb->args[1] = i; | |
867 | cb->args[2] = num; | |
efb3cb42 PE |
868 | out: |
869 | ; | |
870 | } | |
1942c518 | 871 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
872 | |
873 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
c8991362 | 874 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
efb3cb42 PE |
875 | { |
876 | const struct inet_diag_handler *handler; | |
877 | ||
878 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
879 | if (!IS_ERR(handler)) | |
1942c518 | 880 | handler->dump(skb, cb, r, bc); |
d523a328 | 881 | inet_diag_unlock_handler(handler); |
efb3cb42 | 882 | |
1da177e4 LT |
883 | return skb->len; |
884 | } | |
885 | ||
25c4cd2b PE |
886 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
887 | { | |
888 | struct nlattr *bc = NULL; | |
c8991362 | 889 | int hdrlen = sizeof(struct inet_diag_req_v2); |
25c4cd2b PE |
890 | |
891 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
892 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
893 | ||
d106352d | 894 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
895 | } |
896 | ||
a029fe26 PE |
897 | static inline int inet_diag_type2proto(int type) |
898 | { | |
899 | switch (type) { | |
900 | case TCPDIAG_GETSOCK: | |
901 | return IPPROTO_TCP; | |
902 | case DCCPDIAG_GETSOCK: | |
903 | return IPPROTO_DCCP; | |
904 | default: | |
905 | return 0; | |
906 | } | |
907 | } | |
908 | ||
25c4cd2b PE |
909 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
910 | { | |
d106352d | 911 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
c8991362 | 912 | struct inet_diag_req_v2 req; |
25c4cd2b | 913 | struct nlattr *bc = NULL; |
3b09c84c | 914 | int hdrlen = sizeof(struct inet_diag_req); |
25c4cd2b | 915 | |
d23deaa0 | 916 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
917 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
918 | req.idiag_ext = rc->idiag_ext; | |
919 | req.idiag_states = rc->idiag_states; | |
920 | req.id = rc->id; | |
921 | ||
922 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
923 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
924 | ||
925 | return __inet_diag_dump(skb, cb, &req, bc); | |
926 | } | |
927 | ||
fe50ce28 PE |
928 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
929 | const struct nlmsghdr *nlh) | |
930 | { | |
d106352d | 931 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 932 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
933 | |
934 | req.sdiag_family = rc->idiag_family; | |
935 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
936 | req.idiag_ext = rc->idiag_ext; | |
937 | req.idiag_states = rc->idiag_states; | |
938 | req.id = rc->id; | |
939 | ||
940 | return inet_diag_get_exact(in_skb, nlh, &req); | |
941 | } | |
942 | ||
8d34172d | 943 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 944 | { |
3b09c84c | 945 | int hdrlen = sizeof(struct inet_diag_req); |
1da177e4 | 946 | |
ead592ba TG |
947 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
948 | nlmsg_len(nlh) < hdrlen) | |
949 | return -EINVAL; | |
1da177e4 | 950 | |
b8f3ab42 | 951 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
952 | if (nlmsg_attrlen(nlh, hdrlen)) { |
953 | struct nlattr *attr; | |
1da177e4 | 954 | |
ead592ba TG |
955 | attr = nlmsg_find_attr(nlh, hdrlen, |
956 | INET_DIAG_REQ_BYTECODE); | |
957 | if (attr == NULL || | |
958 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
959 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
960 | return -EINVAL; | |
961 | } | |
80d326fa PNA |
962 | { |
963 | struct netlink_dump_control c = { | |
964 | .dump = inet_diag_dump_compat, | |
965 | }; | |
966 | return netlink_dump_start(sock_diag_nlsk, skb, nlh, &c); | |
967 | } | |
1da177e4 | 968 | } |
ead592ba | 969 | |
fe50ce28 | 970 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
971 | } |
972 | ||
d366477a PE |
973 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
974 | { | |
c8991362 | 975 | int hdrlen = sizeof(struct inet_diag_req_v2); |
d366477a PE |
976 | |
977 | if (nlmsg_len(h) < hdrlen) | |
978 | return -EINVAL; | |
979 | ||
980 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
981 | if (nlmsg_attrlen(h, hdrlen)) { |
982 | struct nlattr *attr; | |
983 | attr = nlmsg_find_attr(h, hdrlen, | |
984 | INET_DIAG_REQ_BYTECODE); | |
985 | if (attr == NULL || | |
986 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
987 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
988 | return -EINVAL; | |
989 | } | |
80d326fa PNA |
990 | { |
991 | struct netlink_dump_control c = { | |
992 | .dump = inet_diag_dump, | |
993 | }; | |
994 | return netlink_dump_start(sock_diag_nlsk, skb, h, &c); | |
995 | } | |
d366477a PE |
996 | } |
997 | ||
d106352d | 998 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
d366477a PE |
999 | } |
1000 | ||
8dcf01fc | 1001 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a PE |
1002 | .family = AF_INET, |
1003 | .dump = inet_diag_handler_dump, | |
1004 | }; | |
1005 | ||
8dcf01fc | 1006 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a PE |
1007 | .family = AF_INET6, |
1008 | .dump = inet_diag_handler_dump, | |
1009 | }; | |
1010 | ||
4f5736c4 ACM |
1011 | int inet_diag_register(const struct inet_diag_handler *h) |
1012 | { | |
1013 | const __u16 type = h->idiag_type; | |
1014 | int err = -EINVAL; | |
1015 | ||
f13c95f0 | 1016 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1017 | goto out; |
1018 | ||
d523a328 | 1019 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1020 | err = -EEXIST; |
1021 | if (inet_diag_table[type] == NULL) { | |
1022 | inet_diag_table[type] = h; | |
1023 | err = 0; | |
1024 | } | |
d523a328 | 1025 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1026 | out: |
1027 | return err; | |
1028 | } | |
1029 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1030 | ||
1031 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1032 | { | |
1033 | const __u16 type = h->idiag_type; | |
1034 | ||
f13c95f0 | 1035 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1036 | return; |
1037 | ||
d523a328 | 1038 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1039 | inet_diag_table[type] = NULL; |
d523a328 | 1040 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1041 | } |
1042 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1043 | ||
73c1f4a0 | 1044 | static int __init inet_diag_init(void) |
1da177e4 | 1045 | { |
f13c95f0 | 1046 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1047 | sizeof(struct inet_diag_handler *)); |
1048 | int err = -ENOMEM; | |
1049 | ||
0da974f4 | 1050 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1051 | if (!inet_diag_table) |
1052 | goto out; | |
1053 | ||
d366477a PE |
1054 | err = sock_diag_register(&inet_diag_handler); |
1055 | if (err) | |
1056 | goto out_free_nl; | |
1057 | ||
1058 | err = sock_diag_register(&inet6_diag_handler); | |
1059 | if (err) | |
1060 | goto out_free_inet; | |
1061 | ||
8ef874bf | 1062 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1063 | out: |
1064 | return err; | |
d366477a PE |
1065 | |
1066 | out_free_inet: | |
1067 | sock_diag_unregister(&inet_diag_handler); | |
1068 | out_free_nl: | |
4f5736c4 ACM |
1069 | kfree(inet_diag_table); |
1070 | goto out; | |
1da177e4 LT |
1071 | } |
1072 | ||
73c1f4a0 | 1073 | static void __exit inet_diag_exit(void) |
1da177e4 | 1074 | { |
d366477a PE |
1075 | sock_diag_unregister(&inet6_diag_handler); |
1076 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1077 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1078 | kfree(inet_diag_table); |
1da177e4 LT |
1079 | } |
1080 | ||
73c1f4a0 ACM |
1081 | module_init(inet_diag_init); |
1082 | module_exit(inet_diag_exit); | |
1da177e4 | 1083 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1084 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1085 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |