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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 { |
e31c5e0e ED |
41 | const __be32 *saddr; |
42 | const __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 | ||
e31c5e0e | 64 | static void inet_diag_unlock_handler(const struct inet_diag_handler *handler) |
d523a328 HX |
65 | { |
66 | mutex_unlock(&inet_diag_table_mutex); | |
67 | } | |
68 | ||
a4458343 ED |
69 | static void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) |
70 | { | |
71 | r->idiag_family = sk->sk_family; | |
72 | ||
73 | r->id.idiag_sport = htons(sk->sk_num); | |
74 | r->id.idiag_dport = sk->sk_dport; | |
75 | r->id.idiag_if = sk->sk_bound_dev_if; | |
76 | sock_diag_save_cookie(sk, r->id.idiag_cookie); | |
77 | ||
78 | #if IS_ENABLED(CONFIG_IPV6) | |
79 | if (sk->sk_family == AF_INET6) { | |
80 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; | |
81 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; | |
82 | } else | |
83 | #endif | |
84 | { | |
85 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
86 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
87 | ||
88 | r->id.idiag_src[0] = sk->sk_rcv_saddr; | |
89 | r->id.idiag_dst[0] = sk->sk_daddr; | |
90 | } | |
91 | } | |
92 | ||
3c4d05c8 | 93 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 94 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
95 | struct user_namespace *user_ns, |
96 | u32 portid, u32 seq, u16 nlmsg_flags, | |
97 | const struct nlmsghdr *unlh) | |
1da177e4 | 98 | { |
463c84b9 | 99 | const struct inet_sock *inet = inet_sk(sk); |
e31c5e0e ED |
100 | const struct inet_diag_handler *handler; |
101 | int ext = req->idiag_ext; | |
73c1f4a0 | 102 | struct inet_diag_msg *r; |
1da177e4 | 103 | struct nlmsghdr *nlh; |
6e277ed5 | 104 | struct nlattr *attr; |
4f5736c4 | 105 | void *info = NULL; |
4f5736c4 | 106 | |
a029fe26 | 107 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 108 | BUG_ON(!handler); |
1da177e4 | 109 | |
15e47304 | 110 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
111 | nlmsg_flags); |
112 | if (!nlh) | |
d106352d | 113 | return -EMSGSIZE; |
4f5736c4 | 114 | |
d106352d | 115 | r = nlmsg_data(nlh); |
a58917f5 | 116 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 117 | |
a4458343 | 118 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
119 | r->idiag_state = sk->sk_state; |
120 | r->idiag_timer = 0; | |
121 | r->idiag_retrans = 0; | |
1da177e4 | 122 | |
e4e541a8 PE |
123 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) |
124 | goto errout; | |
125 | ||
717b6d83 MŻ |
126 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
127 | * hence this needs to be included regardless of socket family. | |
128 | */ | |
129 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
6e277ed5 TG |
130 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
131 | goto errout; | |
717b6d83 | 132 | |
dfd56b8b | 133 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 134 | if (r->idiag_family == AF_INET6) { |
06236ac3 | 135 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
efe4208f ED |
136 | if (nla_put_u8(skb, INET_DIAG_TCLASS, |
137 | inet6_sk(sk)->tclass) < 0) | |
6e277ed5 | 138 | goto errout; |
1da177e4 LT |
139 | } |
140 | #endif | |
141 | ||
d06ca956 | 142 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
3c4d05c8 PE |
143 | r->idiag_inode = sock_i_ino(sk); |
144 | ||
6e277ed5 TG |
145 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
146 | struct inet_diag_meminfo minfo = { | |
147 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
148 | .idiag_wmem = sk->sk_wmem_queued, | |
149 | .idiag_fmem = sk->sk_forward_alloc, | |
150 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
151 | }; | |
152 | ||
153 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
154 | goto errout; | |
3c4d05c8 PE |
155 | } |
156 | ||
c0636faa PE |
157 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
158 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 159 | goto errout; |
c0636faa | 160 | |
e31c5e0e | 161 | if (!icsk) { |
62ad6fcd | 162 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
163 | goto out; |
164 | } | |
165 | ||
172589cc | 166 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 167 | |
6ba8a3b1 ND |
168 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
169 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || | |
170 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { | |
73c1f4a0 ACM |
171 | r->idiag_timer = 1; |
172 | r->idiag_retrans = icsk->icsk_retransmits; | |
173 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 174 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
175 | r->idiag_timer = 4; |
176 | r->idiag_retrans = icsk->icsk_probes_out; | |
177 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 178 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
179 | r->idiag_timer = 2; |
180 | r->idiag_retrans = icsk->icsk_probes_out; | |
181 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 182 | } else { |
73c1f4a0 ACM |
183 | r->idiag_timer = 0; |
184 | r->idiag_expires = 0; | |
1da177e4 LT |
185 | } |
186 | #undef EXPIRES_IN_MS | |
540722ff | 187 | |
6e277ed5 TG |
188 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
189 | attr = nla_reserve(skb, INET_DIAG_INFO, | |
190 | sizeof(struct tcp_info)); | |
191 | if (!attr) | |
192 | goto errout; | |
3c4d05c8 | 193 | |
6e277ed5 | 194 | info = nla_data(attr); |
1da177e4 LT |
195 | } |
196 | ||
6e277ed5 TG |
197 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
198 | if (nla_put_string(skb, INET_DIAG_CONG, | |
199 | icsk->icsk_ca_ops->name) < 0) | |
200 | goto errout; | |
201 | ||
4f5736c4 | 202 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 203 | |
6687e988 ACM |
204 | if (sk->sk_state < TCP_TIME_WAIT && |
205 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
206 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 207 | |
3c4d05c8 | 208 | out: |
053c095a JB |
209 | nlmsg_end(skb, nlh); |
210 | return 0; | |
1da177e4 | 211 | |
6e277ed5 TG |
212 | errout: |
213 | nlmsg_cancel(skb, nlh); | |
26932566 | 214 | return -EMSGSIZE; |
1da177e4 | 215 | } |
3c4d05c8 PE |
216 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
217 | ||
218 | static int inet_csk_diag_fill(struct sock *sk, | |
e31c5e0e | 219 | struct sk_buff *skb, |
34160ea3 | 220 | const struct inet_diag_req_v2 *req, |
d06ca956 | 221 | struct user_namespace *user_ns, |
15e47304 | 222 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
223 | const struct nlmsghdr *unlh) |
224 | { | |
e31c5e0e ED |
225 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, |
226 | user_ns, portid, seq, nlmsg_flags, unlh); | |
3c4d05c8 | 227 | } |
1da177e4 | 228 | |
33cf7c90 | 229 | static int inet_twsk_diag_fill(struct sock *sk, |
e31c5e0e | 230 | struct sk_buff *skb, |
15e47304 | 231 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
232 | const struct nlmsghdr *unlh) |
233 | { | |
33cf7c90 | 234 | struct inet_timewait_sock *tw = inet_twsk(sk); |
c7d58aab | 235 | struct inet_diag_msg *r; |
6e277ed5 | 236 | struct nlmsghdr *nlh; |
e31c5e0e | 237 | s32 tmo; |
d106352d | 238 | |
15e47304 | 239 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
240 | nlmsg_flags); |
241 | if (!nlh) | |
d106352d | 242 | return -EMSGSIZE; |
c7d58aab | 243 | |
d106352d | 244 | r = nlmsg_data(nlh); |
c7d58aab ACM |
245 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
246 | ||
96f817fe | 247 | tmo = tw->tw_ttd - inet_tw_time_stamp(); |
c7d58aab ACM |
248 | if (tmo < 0) |
249 | tmo = 0; | |
250 | ||
a4458343 | 251 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 252 | r->idiag_retrans = 0; |
b1aac815 | 253 | |
c7d58aab ACM |
254 | r->idiag_state = tw->tw_substate; |
255 | r->idiag_timer = 3; | |
96f817fe | 256 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
257 | r->idiag_rqueue = 0; |
258 | r->idiag_wqueue = 0; | |
259 | r->idiag_uid = 0; | |
260 | r->idiag_inode = 0; | |
6e277ed5 | 261 | |
053c095a JB |
262 | nlmsg_end(skb, nlh); |
263 | return 0; | |
c7d58aab ACM |
264 | } |
265 | ||
a58917f5 ED |
266 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
267 | u32 portid, u32 seq, u16 nlmsg_flags, | |
268 | const struct nlmsghdr *unlh) | |
269 | { | |
270 | struct inet_diag_msg *r; | |
271 | struct nlmsghdr *nlh; | |
272 | long tmo; | |
273 | ||
274 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
275 | nlmsg_flags); | |
276 | if (!nlh) | |
277 | return -EMSGSIZE; | |
278 | ||
279 | r = nlmsg_data(nlh); | |
280 | inet_diag_msg_common_fill(r, sk); | |
281 | r->idiag_state = TCP_SYN_RECV; | |
282 | r->idiag_timer = 1; | |
283 | r->idiag_retrans = inet_reqsk(sk)->num_retrans; | |
284 | ||
285 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
286 | offsetof(struct sock, sk_cookie)); | |
287 | ||
288 | tmo = inet_reqsk(sk)->expires - jiffies; | |
289 | r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0; | |
290 | r->idiag_rqueue = 0; | |
291 | r->idiag_wqueue = 0; | |
292 | r->idiag_uid = 0; | |
293 | r->idiag_inode = 0; | |
294 | ||
295 | nlmsg_end(skb, nlh); | |
296 | return 0; | |
297 | } | |
298 | ||
dff2c035 | 299 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 300 | const struct inet_diag_req_v2 *r, |
d06ca956 | 301 | struct user_namespace *user_ns, |
15e47304 | 302 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
303 | const struct nlmsghdr *unlh) |
304 | { | |
305 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 306 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
307 | nlmsg_flags, unlh); |
308 | ||
a58917f5 ED |
309 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
310 | return inet_req_diag_fill(sk, skb, portid, seq, | |
311 | nlmsg_flags, unlh); | |
312 | ||
efe4208f ED |
313 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
314 | nlmsg_flags, unlh); | |
dff2c035 ACM |
315 | } |
316 | ||
e31c5e0e ED |
317 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, |
318 | struct sk_buff *in_skb, | |
319 | const struct nlmsghdr *nlh, | |
34160ea3 | 320 | const struct inet_diag_req_v2 *req) |
1da177e4 | 321 | { |
51d7cccf | 322 | struct net *net = sock_net(in_skb->sk); |
e31c5e0e ED |
323 | struct sk_buff *rep; |
324 | struct sock *sk; | |
325 | int err; | |
d523a328 | 326 | |
d523a328 | 327 | err = -EINVAL; |
e31c5e0e | 328 | if (req->sdiag_family == AF_INET) |
51d7cccf | 329 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
330 | req->id.idiag_dport, req->id.idiag_src[0], |
331 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 332 | #if IS_ENABLED(CONFIG_IPV6) |
e31c5e0e | 333 | else if (req->sdiag_family == AF_INET6) |
51d7cccf | 334 | sk = inet6_lookup(net, hashinfo, |
73c1f4a0 ACM |
335 | (struct in6_addr *)req->id.idiag_dst, |
336 | req->id.idiag_dport, | |
337 | (struct in6_addr *)req->id.idiag_src, | |
338 | req->id.idiag_sport, | |
339 | req->id.idiag_if); | |
1da177e4 | 340 | #endif |
e31c5e0e | 341 | else |
476f7dbf | 342 | goto out_nosk; |
1da177e4 | 343 | |
d523a328 | 344 | err = -ENOENT; |
e31c5e0e | 345 | if (!sk) |
476f7dbf | 346 | goto out_nosk; |
1da177e4 | 347 | |
f65c1b53 | 348 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 349 | if (err) |
1da177e4 LT |
350 | goto out; |
351 | ||
6e277ed5 TG |
352 | rep = nlmsg_new(sizeof(struct inet_diag_msg) + |
353 | sizeof(struct inet_diag_meminfo) + | |
354 | sizeof(struct tcp_info) + 64, GFP_KERNEL); | |
355 | if (!rep) { | |
356 | err = -ENOMEM; | |
1da177e4 | 357 | goto out; |
6e277ed5 | 358 | } |
1da177e4 | 359 | |
a029fe26 | 360 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 361 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 362 | NETLINK_CB(in_skb).portid, |
26932566 PM |
363 | nlh->nlmsg_seq, 0, nlh); |
364 | if (err < 0) { | |
365 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 366 | nlmsg_free(rep); |
26932566 PM |
367 | goto out; |
368 | } | |
15e47304 | 369 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 370 | MSG_DONTWAIT); |
1da177e4 LT |
371 | if (err > 0) |
372 | err = 0; | |
373 | ||
374 | out: | |
c1d607cc ED |
375 | if (sk) |
376 | sock_gen_put(sk); | |
377 | ||
476f7dbf PE |
378 | out_nosk: |
379 | return err; | |
380 | } | |
1942c518 | 381 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
382 | |
383 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
384 | const struct nlmsghdr *nlh, | |
34160ea3 | 385 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
386 | { |
387 | const struct inet_diag_handler *handler; | |
388 | int err; | |
389 | ||
390 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
391 | if (IS_ERR(handler)) | |
392 | err = PTR_ERR(handler); | |
393 | else | |
1942c518 | 394 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 395 | inet_diag_unlock_handler(handler); |
476f7dbf | 396 | |
1da177e4 LT |
397 | return err; |
398 | } | |
399 | ||
9f855299 | 400 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
401 | { |
402 | int words = bits >> 5; | |
403 | ||
404 | bits &= 0x1f; | |
405 | ||
406 | if (words) { | |
407 | if (memcmp(a1, a2, words << 2)) | |
408 | return 0; | |
409 | } | |
410 | if (bits) { | |
9f855299 AV |
411 | __be32 w1, w2; |
412 | __be32 mask; | |
1da177e4 LT |
413 | |
414 | w1 = a1[words]; | |
415 | w2 = a2[words]; | |
416 | ||
417 | mask = htonl((0xffffffff) << (32 - bits)); | |
418 | ||
419 | if ((w1 ^ w2) & mask) | |
420 | return 0; | |
421 | } | |
422 | ||
423 | return 1; | |
424 | } | |
425 | ||
87c22ea5 | 426 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 427 | const struct inet_diag_entry *entry) |
1da177e4 | 428 | { |
87c22ea5 PE |
429 | const void *bc = nla_data(_bc); |
430 | int len = nla_len(_bc); | |
431 | ||
1da177e4 LT |
432 | while (len > 0) { |
433 | int yes = 1; | |
73c1f4a0 | 434 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
435 | |
436 | switch (op->code) { | |
73c1f4a0 | 437 | case INET_DIAG_BC_NOP: |
1da177e4 | 438 | break; |
73c1f4a0 | 439 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
440 | yes = 0; |
441 | break; | |
73c1f4a0 | 442 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
443 | yes = entry->sport >= op[1].no; |
444 | break; | |
73c1f4a0 | 445 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 446 | yes = entry->sport <= op[1].no; |
1da177e4 | 447 | break; |
73c1f4a0 | 448 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
449 | yes = entry->dport >= op[1].no; |
450 | break; | |
73c1f4a0 | 451 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
452 | yes = entry->dport <= op[1].no; |
453 | break; | |
73c1f4a0 | 454 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
455 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
456 | break; | |
73c1f4a0 | 457 | case INET_DIAG_BC_S_COND: |
a8c2190e | 458 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
459 | const struct inet_diag_hostcond *cond; |
460 | const __be32 *addr; | |
1da177e4 | 461 | |
e31c5e0e | 462 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 463 | if (cond->port != -1 && |
73c1f4a0 | 464 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
465 | entry->sport : entry->dport)) { |
466 | yes = 0; | |
467 | break; | |
468 | } | |
4e852c02 | 469 | |
73c1f4a0 | 470 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
471 | addr = entry->saddr; |
472 | else | |
473 | addr = entry->daddr; | |
474 | ||
f67caec9 NC |
475 | if (cond->family != AF_UNSPEC && |
476 | cond->family != entry->family) { | |
477 | if (entry->family == AF_INET6 && | |
478 | cond->family == AF_INET) { | |
479 | if (addr[0] == 0 && addr[1] == 0 && | |
480 | addr[2] == htonl(0xffff) && | |
481 | bitstring_match(addr + 3, | |
482 | cond->addr, | |
483 | cond->prefix_len)) | |
484 | break; | |
485 | } | |
486 | yes = 0; | |
487 | break; | |
488 | } | |
489 | ||
490 | if (cond->prefix_len == 0) | |
491 | break; | |
4e852c02 ACM |
492 | if (bitstring_match(addr, cond->addr, |
493 | cond->prefix_len)) | |
1da177e4 | 494 | break; |
1da177e4 LT |
495 | yes = 0; |
496 | break; | |
497 | } | |
498 | } | |
499 | ||
4e852c02 | 500 | if (yes) { |
1da177e4 LT |
501 | len -= op->yes; |
502 | bc += op->yes; | |
503 | } else { | |
504 | len -= op->no; | |
505 | bc += op->no; | |
506 | } | |
507 | } | |
a02cec21 | 508 | return len == 0; |
1da177e4 LT |
509 | } |
510 | ||
a4458343 ED |
511 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
512 | */ | |
513 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
514 | const struct sock *sk) | |
515 | { | |
516 | #if IS_ENABLED(CONFIG_IPV6) | |
517 | if (sk->sk_family == AF_INET6) { | |
518 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
519 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
520 | } else | |
521 | #endif | |
522 | { | |
523 | entry->saddr = &sk->sk_rcv_saddr; | |
524 | entry->daddr = &sk->sk_daddr; | |
525 | } | |
526 | } | |
527 | ||
8d07d151 PE |
528 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
529 | { | |
8d07d151 | 530 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 531 | struct inet_diag_entry entry; |
8d07d151 | 532 | |
e31c5e0e | 533 | if (!bc) |
8d07d151 PE |
534 | return 1; |
535 | ||
536 | entry.family = sk->sk_family; | |
a4458343 | 537 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
538 | entry.sport = inet->inet_num; |
539 | entry.dport = ntohs(inet->inet_dport); | |
a58917f5 | 540 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
8d07d151 PE |
541 | |
542 | return inet_diag_bc_run(bc, &entry); | |
543 | } | |
544 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
545 | ||
1da177e4 LT |
546 | static int valid_cc(const void *bc, int len, int cc) |
547 | { | |
548 | while (len >= 0) { | |
73c1f4a0 | 549 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
550 | |
551 | if (cc > len) | |
552 | return 0; | |
553 | if (cc == len) | |
554 | return 1; | |
eeb14972 | 555 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
556 | return 0; |
557 | len -= op->yes; | |
558 | bc += op->yes; | |
559 | } | |
560 | return 0; | |
561 | } | |
562 | ||
405c0059 NC |
563 | /* Validate an inet_diag_hostcond. */ |
564 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
565 | int *min_len) | |
566 | { | |
405c0059 | 567 | struct inet_diag_hostcond *cond; |
e31c5e0e | 568 | int addr_len; |
405c0059 NC |
569 | |
570 | /* Check hostcond space. */ | |
571 | *min_len += sizeof(struct inet_diag_hostcond); | |
572 | if (len < *min_len) | |
573 | return false; | |
574 | cond = (struct inet_diag_hostcond *)(op + 1); | |
575 | ||
576 | /* Check address family and address length. */ | |
577 | switch (cond->family) { | |
578 | case AF_UNSPEC: | |
579 | addr_len = 0; | |
580 | break; | |
581 | case AF_INET: | |
582 | addr_len = sizeof(struct in_addr); | |
583 | break; | |
584 | case AF_INET6: | |
585 | addr_len = sizeof(struct in6_addr); | |
586 | break; | |
587 | default: | |
588 | return false; | |
589 | } | |
590 | *min_len += addr_len; | |
591 | if (len < *min_len) | |
592 | return false; | |
593 | ||
594 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
595 | if (cond->prefix_len > 8 * addr_len) | |
596 | return false; | |
597 | ||
598 | return true; | |
599 | } | |
600 | ||
5e1f5420 | 601 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
602 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
603 | int len, int *min_len) | |
5e1f5420 NC |
604 | { |
605 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
606 | *min_len += sizeof(struct inet_diag_bc_op); | |
607 | if (len < *min_len) | |
608 | return false; | |
609 | return true; | |
610 | } | |
611 | ||
73c1f4a0 | 612 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 613 | { |
eeb14972 | 614 | const void *bc = bytecode; |
1da177e4 LT |
615 | int len = bytecode_len; |
616 | ||
617 | while (len > 0) { | |
405c0059 | 618 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 619 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 620 | |
1da177e4 | 621 | switch (op->code) { |
73c1f4a0 ACM |
622 | case INET_DIAG_BC_S_COND: |
623 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
624 | if (!valid_hostcond(bc, len, &min_len)) |
625 | return -EINVAL; | |
5e1f5420 | 626 | break; |
73c1f4a0 ACM |
627 | case INET_DIAG_BC_S_GE: |
628 | case INET_DIAG_BC_S_LE: | |
629 | case INET_DIAG_BC_D_GE: | |
630 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 631 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
632 | return -EINVAL; |
633 | break; | |
5e1f5420 NC |
634 | case INET_DIAG_BC_AUTO: |
635 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 636 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
637 | break; |
638 | default: | |
639 | return -EINVAL; | |
640 | } | |
5e1f5420 NC |
641 | |
642 | if (op->code != INET_DIAG_BC_NOP) { | |
643 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
644 | return -EINVAL; | |
645 | if (op->no < len && | |
646 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
647 | return -EINVAL; | |
648 | } | |
649 | ||
405c0059 | 650 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 651 | return -EINVAL; |
4e852c02 | 652 | bc += op->yes; |
1da177e4 LT |
653 | len -= op->yes; |
654 | } | |
655 | return len == 0 ? 0 : -EINVAL; | |
656 | } | |
657 | ||
dff2c035 ACM |
658 | static int inet_csk_diag_dump(struct sock *sk, |
659 | struct sk_buff *skb, | |
37f352b5 | 660 | struct netlink_callback *cb, |
34160ea3 | 661 | const struct inet_diag_req_v2 *r, |
37f352b5 | 662 | const struct nlattr *bc) |
1da177e4 | 663 | { |
8d07d151 PE |
664 | if (!inet_diag_bc_sk(bc, sk)) |
665 | return 0; | |
1da177e4 | 666 | |
a029fe26 | 667 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 668 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 669 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 670 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
671 | } |
672 | ||
49612729 ED |
673 | static void twsk_build_assert(void) |
674 | { | |
675 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
676 | offsetof(struct sock, sk_family)); | |
677 | ||
678 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
679 | offsetof(struct inet_sock, inet_num)); | |
680 | ||
681 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
682 | offsetof(struct inet_sock, inet_dport)); | |
683 | ||
684 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
685 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
686 | ||
687 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
688 | offsetof(struct inet_sock, inet_daddr)); | |
689 | ||
690 | #if IS_ENABLED(CONFIG_IPV6) | |
691 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
692 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
693 | ||
694 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
695 | offsetof(struct sock, sk_v6_daddr)); | |
696 | #endif | |
697 | } | |
698 | ||
73c1f4a0 | 699 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 700 | struct netlink_callback *cb, |
34160ea3 | 701 | const struct inet_diag_req_v2 *r, |
37f352b5 | 702 | const struct nlattr *bc) |
1da177e4 | 703 | { |
463c84b9 | 704 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 705 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e ED |
706 | struct inet_diag_entry entry; |
707 | int j, s_j, reqnum, s_reqnum; | |
708 | struct listen_sock *lopt; | |
1da177e4 LT |
709 | int err = 0; |
710 | ||
711 | s_j = cb->args[3]; | |
712 | s_reqnum = cb->args[4]; | |
713 | ||
714 | if (s_j > 0) | |
715 | s_j--; | |
716 | ||
717 | entry.family = sk->sk_family; | |
718 | ||
463c84b9 | 719 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 720 | |
463c84b9 | 721 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
722 | if (!lopt || !lopt->qlen) |
723 | goto out; | |
724 | ||
e31c5e0e | 725 | if (bc) { |
c720c7e8 | 726 | entry.sport = inet->inet_num; |
1da177e4 LT |
727 | entry.userlocks = sk->sk_userlocks; |
728 | } | |
729 | ||
540722ff | 730 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 731 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
732 | |
733 | reqnum = 0; | |
734 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
735 | struct inet_request_sock *ireq = inet_rsk(req); |
736 | ||
1da177e4 LT |
737 | if (reqnum < s_reqnum) |
738 | continue; | |
634fb979 | 739 | if (r->id.idiag_dport != ireq->ir_rmt_port && |
73c1f4a0 | 740 | r->id.idiag_dport) |
1da177e4 LT |
741 | continue; |
742 | ||
743 | if (bc) { | |
a4458343 | 744 | /* Note: entry.sport and entry.userlocks are already set */ |
08d2cc3b | 745 | entry_fill_addrs(&entry, req_to_sk(req)); |
634fb979 | 746 | entry.dport = ntohs(ireq->ir_rmt_port); |
1da177e4 | 747 | |
87c22ea5 | 748 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
749 | continue; |
750 | } | |
751 | ||
08d2cc3b | 752 | err = inet_req_diag_fill(req_to_sk(req), skb, |
e31c5e0e | 753 | NETLINK_CB(cb->skb).portid, |
a58917f5 ED |
754 | cb->nlh->nlmsg_seq, |
755 | NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
756 | if (err < 0) { |
757 | cb->args[3] = j + 1; | |
758 | cb->args[4] = reqnum; | |
759 | goto out; | |
760 | } | |
761 | } | |
762 | ||
763 | s_reqnum = 0; | |
764 | } | |
765 | ||
766 | out: | |
463c84b9 | 767 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
768 | |
769 | return err; | |
770 | } | |
771 | ||
1942c518 | 772 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
e31c5e0e | 773 | struct netlink_callback *cb, |
34160ea3 | 774 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 | 775 | { |
51d7cccf | 776 | struct net *net = sock_net(skb->sk); |
e31c5e0e | 777 | int i, num, s_i, s_num; |
4e852c02 | 778 | |
1da177e4 LT |
779 | s_i = cb->args[1]; |
780 | s_num = num = cb->args[2]; | |
4f5736c4 | 781 | |
1da177e4 | 782 | if (cb->args[0] == 0) { |
73c1f4a0 | 783 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 784 | goto skip_listen_ht; |
540722ff | 785 | |
0f7ff927 | 786 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 787 | struct inet_listen_hashbucket *ilb; |
e31c5e0e ED |
788 | struct hlist_nulls_node *node; |
789 | struct sock *sk; | |
1da177e4 LT |
790 | |
791 | num = 0; | |
5caea4ea ED |
792 | ilb = &hashinfo->listening_hash[i]; |
793 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 794 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
795 | struct inet_sock *inet = inet_sk(sk); |
796 | ||
51d7cccf AV |
797 | if (!net_eq(sock_net(sk), net)) |
798 | continue; | |
799 | ||
1da177e4 LT |
800 | if (num < s_num) { |
801 | num++; | |
802 | continue; | |
803 | } | |
804 | ||
d23deaa0 | 805 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 806 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
807 | goto next_listen; |
808 | ||
c720c7e8 | 809 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 810 | r->id.idiag_sport) |
1da177e4 LT |
811 | goto next_listen; |
812 | ||
73c1f4a0 ACM |
813 | if (!(r->idiag_states & TCPF_LISTEN) || |
814 | r->id.idiag_dport || | |
1da177e4 LT |
815 | cb->args[3] > 0) |
816 | goto syn_recv; | |
817 | ||
25c4cd2b | 818 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 819 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
820 | goto done; |
821 | } | |
822 | ||
823 | syn_recv: | |
73c1f4a0 | 824 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
825 | goto next_listen; |
826 | ||
25c4cd2b | 827 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 828 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
829 | goto done; |
830 | } | |
831 | ||
832 | next_listen: | |
833 | cb->args[3] = 0; | |
834 | cb->args[4] = 0; | |
835 | ++num; | |
836 | } | |
5caea4ea | 837 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
838 | |
839 | s_num = 0; | |
840 | cb->args[3] = 0; | |
841 | cb->args[4] = 0; | |
842 | } | |
1da177e4 LT |
843 | skip_listen_ht: |
844 | cb->args[0] = 1; | |
845 | s_i = num = s_num = 0; | |
846 | } | |
847 | ||
73c1f4a0 | 848 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 849 | goto out; |
1da177e4 | 850 | |
f373b53b | 851 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 852 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 853 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 854 | struct hlist_nulls_node *node; |
e31c5e0e | 855 | struct sock *sk; |
1da177e4 | 856 | |
6be547a6 AK |
857 | num = 0; |
858 | ||
05dbc7b5 | 859 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
860 | continue; |
861 | ||
1da177e4 LT |
862 | if (i > s_i) |
863 | s_num = 0; | |
864 | ||
7e3aab4a | 865 | spin_lock_bh(lock); |
3ab5aee7 | 866 | sk_nulls_for_each(sk, node, &head->chain) { |
e31c5e0e | 867 | int state, res; |
1da177e4 | 868 | |
51d7cccf AV |
869 | if (!net_eq(sock_net(sk), net)) |
870 | continue; | |
1da177e4 LT |
871 | if (num < s_num) |
872 | goto next_normal; | |
70315d22 NC |
873 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
874 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
875 | if (!(r->idiag_states & (1 << state))) | |
1da177e4 | 876 | goto next_normal; |
d23deaa0 | 877 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 878 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 879 | goto next_normal; |
05dbc7b5 | 880 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 881 | r->id.idiag_sport) |
1da177e4 | 882 | goto next_normal; |
05dbc7b5 | 883 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 884 | r->id.idiag_dport) |
1da177e4 | 885 | goto next_normal; |
a58917f5 ED |
886 | twsk_build_assert(); |
887 | ||
888 | if (!inet_diag_bc_sk(bc, sk)) | |
889 | goto next_normal; | |
890 | ||
891 | res = sk_diag_fill(sk, skb, r, | |
892 | sk_user_ns(NETLINK_CB(cb->skb).sk), | |
893 | NETLINK_CB(cb->skb).portid, | |
894 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
895 | cb->nlh); | |
05dbc7b5 | 896 | if (res < 0) { |
7e3aab4a | 897 | spin_unlock_bh(lock); |
1da177e4 LT |
898 | goto done; |
899 | } | |
900 | next_normal: | |
901 | ++num; | |
902 | } | |
903 | ||
7e3aab4a | 904 | spin_unlock_bh(lock); |
1da177e4 LT |
905 | } |
906 | ||
907 | done: | |
908 | cb->args[1] = i; | |
909 | cb->args[2] = num; | |
efb3cb42 PE |
910 | out: |
911 | ; | |
912 | } | |
1942c518 | 913 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
914 | |
915 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
34160ea3 | 916 | const struct inet_diag_req_v2 *r, |
e31c5e0e | 917 | struct nlattr *bc) |
efb3cb42 PE |
918 | { |
919 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 920 | int err = 0; |
efb3cb42 PE |
921 | |
922 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
923 | if (!IS_ERR(handler)) | |
1942c518 | 924 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
925 | else |
926 | err = PTR_ERR(handler); | |
d523a328 | 927 | inet_diag_unlock_handler(handler); |
efb3cb42 | 928 | |
cacb6ba0 | 929 | return err ? : skb->len; |
1da177e4 LT |
930 | } |
931 | ||
25c4cd2b PE |
932 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
933 | { | |
c8991362 | 934 | int hdrlen = sizeof(struct inet_diag_req_v2); |
e31c5e0e | 935 | struct nlattr *bc = NULL; |
25c4cd2b PE |
936 | |
937 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
938 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
939 | ||
d106352d | 940 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
941 | } |
942 | ||
e31c5e0e | 943 | static int inet_diag_type2proto(int type) |
a029fe26 PE |
944 | { |
945 | switch (type) { | |
946 | case TCPDIAG_GETSOCK: | |
947 | return IPPROTO_TCP; | |
948 | case DCCPDIAG_GETSOCK: | |
949 | return IPPROTO_DCCP; | |
950 | default: | |
951 | return 0; | |
952 | } | |
953 | } | |
954 | ||
e31c5e0e ED |
955 | static int inet_diag_dump_compat(struct sk_buff *skb, |
956 | struct netlink_callback *cb) | |
25c4cd2b | 957 | { |
d106352d | 958 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
e31c5e0e | 959 | int hdrlen = sizeof(struct inet_diag_req); |
c8991362 | 960 | struct inet_diag_req_v2 req; |
25c4cd2b | 961 | struct nlattr *bc = NULL; |
25c4cd2b | 962 | |
d23deaa0 | 963 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
964 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
965 | req.idiag_ext = rc->idiag_ext; | |
966 | req.idiag_states = rc->idiag_states; | |
967 | req.id = rc->id; | |
968 | ||
969 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
970 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
971 | ||
972 | return __inet_diag_dump(skb, cb, &req, bc); | |
973 | } | |
974 | ||
fe50ce28 | 975 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
e31c5e0e | 976 | const struct nlmsghdr *nlh) |
fe50ce28 | 977 | { |
d106352d | 978 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 979 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
980 | |
981 | req.sdiag_family = rc->idiag_family; | |
982 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
983 | req.idiag_ext = rc->idiag_ext; | |
984 | req.idiag_states = rc->idiag_states; | |
985 | req.id = rc->id; | |
986 | ||
987 | return inet_diag_get_exact(in_skb, nlh, &req); | |
988 | } | |
989 | ||
8d34172d | 990 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 991 | { |
3b09c84c | 992 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 993 | struct net *net = sock_net(skb->sk); |
1da177e4 | 994 | |
ead592ba TG |
995 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
996 | nlmsg_len(nlh) < hdrlen) | |
997 | return -EINVAL; | |
1da177e4 | 998 | |
b8f3ab42 | 999 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1000 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1001 | struct nlattr *attr; | |
1da177e4 | 1002 | |
ead592ba TG |
1003 | attr = nlmsg_find_attr(nlh, hdrlen, |
1004 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1005 | if (!attr || |
ead592ba TG |
1006 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1007 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1008 | return -EINVAL; | |
1009 | } | |
80d326fa PNA |
1010 | { |
1011 | struct netlink_dump_control c = { | |
1012 | .dump = inet_diag_dump_compat, | |
1013 | }; | |
51d7cccf | 1014 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1015 | } |
1da177e4 | 1016 | } |
ead592ba | 1017 | |
fe50ce28 | 1018 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1019 | } |
1020 | ||
d366477a PE |
1021 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
1022 | { | |
c8991362 | 1023 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1024 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1025 | |
1026 | if (nlmsg_len(h) < hdrlen) | |
1027 | return -EINVAL; | |
1028 | ||
1029 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1030 | if (nlmsg_attrlen(h, hdrlen)) { |
1031 | struct nlattr *attr; | |
e31c5e0e | 1032 | |
25c4cd2b PE |
1033 | attr = nlmsg_find_attr(h, hdrlen, |
1034 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1035 | if (!attr || |
25c4cd2b PE |
1036 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1037 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1038 | return -EINVAL; | |
1039 | } | |
80d326fa PNA |
1040 | { |
1041 | struct netlink_dump_control c = { | |
1042 | .dump = inet_diag_dump, | |
1043 | }; | |
51d7cccf | 1044 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1045 | } |
d366477a PE |
1046 | } |
1047 | ||
d106352d | 1048 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
d366477a PE |
1049 | } |
1050 | ||
8dcf01fc | 1051 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a PE |
1052 | .family = AF_INET, |
1053 | .dump = inet_diag_handler_dump, | |
1054 | }; | |
1055 | ||
8dcf01fc | 1056 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a PE |
1057 | .family = AF_INET6, |
1058 | .dump = inet_diag_handler_dump, | |
1059 | }; | |
1060 | ||
4f5736c4 ACM |
1061 | int inet_diag_register(const struct inet_diag_handler *h) |
1062 | { | |
1063 | const __u16 type = h->idiag_type; | |
1064 | int err = -EINVAL; | |
1065 | ||
f13c95f0 | 1066 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1067 | goto out; |
1068 | ||
d523a328 | 1069 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1070 | err = -EEXIST; |
e31c5e0e | 1071 | if (!inet_diag_table[type]) { |
4f5736c4 ACM |
1072 | inet_diag_table[type] = h; |
1073 | err = 0; | |
1074 | } | |
d523a328 | 1075 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1076 | out: |
1077 | return err; | |
1078 | } | |
1079 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1080 | ||
1081 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1082 | { | |
1083 | const __u16 type = h->idiag_type; | |
1084 | ||
f13c95f0 | 1085 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1086 | return; |
1087 | ||
d523a328 | 1088 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1089 | inet_diag_table[type] = NULL; |
d523a328 | 1090 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1091 | } |
1092 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1093 | ||
73c1f4a0 | 1094 | static int __init inet_diag_init(void) |
1da177e4 | 1095 | { |
f13c95f0 | 1096 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1097 | sizeof(struct inet_diag_handler *)); |
1098 | int err = -ENOMEM; | |
1099 | ||
0da974f4 | 1100 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1101 | if (!inet_diag_table) |
1102 | goto out; | |
1103 | ||
d366477a PE |
1104 | err = sock_diag_register(&inet_diag_handler); |
1105 | if (err) | |
1106 | goto out_free_nl; | |
1107 | ||
1108 | err = sock_diag_register(&inet6_diag_handler); | |
1109 | if (err) | |
1110 | goto out_free_inet; | |
1111 | ||
8ef874bf | 1112 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1113 | out: |
1114 | return err; | |
d366477a PE |
1115 | |
1116 | out_free_inet: | |
1117 | sock_diag_unregister(&inet_diag_handler); | |
1118 | out_free_nl: | |
4f5736c4 ACM |
1119 | kfree(inet_diag_table); |
1120 | goto out; | |
1da177e4 LT |
1121 | } |
1122 | ||
73c1f4a0 | 1123 | static void __exit inet_diag_exit(void) |
1da177e4 | 1124 | { |
d366477a PE |
1125 | sock_diag_unregister(&inet6_diag_handler); |
1126 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1127 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1128 | kfree(inet_diag_table); |
1da177e4 LT |
1129 | } |
1130 | ||
73c1f4a0 ACM |
1131 | module_init(inet_diag_init); |
1132 | module_exit(inet_diag_exit); | |
1da177e4 | 1133 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1134 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1135 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |