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 | ||
cb2050a7 | 69 | void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) |
a4458343 ED |
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 | } | |
cb2050a7 | 92 | EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill); |
a4458343 | 93 | |
c8e2c80d ED |
94 | static size_t inet_sk_attr_size(void) |
95 | { | |
96 | return nla_total_size(sizeof(struct tcp_info)) | |
97 | + nla_total_size(1) /* INET_DIAG_SHUTDOWN */ | |
98 | + nla_total_size(1) /* INET_DIAG_TOS */ | |
99 | + nla_total_size(1) /* INET_DIAG_TCLASS */ | |
100 | + nla_total_size(sizeof(struct inet_diag_meminfo)) | |
101 | + nla_total_size(sizeof(struct inet_diag_msg)) | |
102 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) | |
103 | + nla_total_size(TCP_CA_NAME_MAX) | |
104 | + nla_total_size(sizeof(struct tcpvegas_info)) | |
105 | + 64; | |
106 | } | |
107 | ||
cb2050a7 XL |
108 | int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb, |
109 | struct inet_diag_msg *r, int ext, | |
110 | struct user_namespace *user_ns) | |
111 | { | |
112 | const struct inet_sock *inet = inet_sk(sk); | |
113 | ||
114 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) | |
115 | goto errout; | |
116 | ||
117 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, | |
118 | * hence this needs to be included regardless of socket family. | |
119 | */ | |
120 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
121 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) | |
122 | goto errout; | |
123 | ||
124 | #if IS_ENABLED(CONFIG_IPV6) | |
125 | if (r->idiag_family == AF_INET6) { | |
126 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) | |
127 | if (nla_put_u8(skb, INET_DIAG_TCLASS, | |
128 | inet6_sk(sk)->tclass) < 0) | |
129 | goto errout; | |
130 | ||
131 | if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
132 | nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk))) | |
133 | goto errout; | |
134 | } | |
135 | #endif | |
136 | ||
137 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); | |
138 | r->idiag_inode = sock_i_ino(sk); | |
139 | ||
140 | return 0; | |
141 | errout: | |
142 | return 1; | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill); | |
145 | ||
3c4d05c8 | 146 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 147 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
148 | struct user_namespace *user_ns, |
149 | u32 portid, u32 seq, u16 nlmsg_flags, | |
150 | const struct nlmsghdr *unlh) | |
1da177e4 | 151 | { |
521f1cf1 | 152 | const struct tcp_congestion_ops *ca_ops; |
e31c5e0e ED |
153 | const struct inet_diag_handler *handler; |
154 | int ext = req->idiag_ext; | |
73c1f4a0 | 155 | struct inet_diag_msg *r; |
1da177e4 | 156 | struct nlmsghdr *nlh; |
6e277ed5 | 157 | struct nlattr *attr; |
4f5736c4 | 158 | void *info = NULL; |
4f5736c4 | 159 | |
a029fe26 | 160 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 161 | BUG_ON(!handler); |
1da177e4 | 162 | |
15e47304 | 163 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
164 | nlmsg_flags); |
165 | if (!nlh) | |
d106352d | 166 | return -EMSGSIZE; |
4f5736c4 | 167 | |
d106352d | 168 | r = nlmsg_data(nlh); |
a58917f5 | 169 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 170 | |
a4458343 | 171 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
172 | r->idiag_state = sk->sk_state; |
173 | r->idiag_timer = 0; | |
174 | r->idiag_retrans = 0; | |
1da177e4 | 175 | |
cb2050a7 | 176 | if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns)) |
e4e541a8 PE |
177 | goto errout; |
178 | ||
6e277ed5 TG |
179 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
180 | struct inet_diag_meminfo minfo = { | |
181 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
182 | .idiag_wmem = sk->sk_wmem_queued, | |
183 | .idiag_fmem = sk->sk_forward_alloc, | |
184 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
185 | }; | |
186 | ||
187 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
188 | goto errout; | |
3c4d05c8 PE |
189 | } |
190 | ||
c0636faa PE |
191 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
192 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 193 | goto errout; |
c0636faa | 194 | |
e31c5e0e | 195 | if (!icsk) { |
62ad6fcd | 196 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
197 | goto out; |
198 | } | |
199 | ||
6ba8a3b1 ND |
200 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
201 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || | |
202 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { | |
73c1f4a0 ACM |
203 | r->idiag_timer = 1; |
204 | r->idiag_retrans = icsk->icsk_retransmits; | |
b7de529c XL |
205 | r->idiag_expires = |
206 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
463c84b9 | 207 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
208 | r->idiag_timer = 4; |
209 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
210 | r->idiag_expires = |
211 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
1da177e4 | 212 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
213 | r->idiag_timer = 2; |
214 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
215 | r->idiag_expires = |
216 | jiffies_to_msecs(sk->sk_timer.expires - jiffies); | |
1da177e4 | 217 | } else { |
73c1f4a0 ACM |
218 | r->idiag_timer = 0; |
219 | r->idiag_expires = 0; | |
1da177e4 | 220 | } |
540722ff | 221 | |
3fd22af8 | 222 | if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { |
6e277ed5 | 223 | attr = nla_reserve(skb, INET_DIAG_INFO, |
3fd22af8 | 224 | handler->idiag_info_size); |
6e277ed5 TG |
225 | if (!attr) |
226 | goto errout; | |
3c4d05c8 | 227 | |
6e277ed5 | 228 | info = nla_data(attr); |
1da177e4 LT |
229 | } |
230 | ||
521f1cf1 ED |
231 | if (ext & (1 << (INET_DIAG_CONG - 1))) { |
232 | int err = 0; | |
233 | ||
234 | rcu_read_lock(); | |
235 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
236 | if (ca_ops) | |
237 | err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); | |
238 | rcu_read_unlock(); | |
239 | if (err < 0) | |
6e277ed5 | 240 | goto errout; |
521f1cf1 | 241 | } |
6e277ed5 | 242 | |
4f5736c4 | 243 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 244 | |
521f1cf1 | 245 | if (sk->sk_state < TCP_TIME_WAIT) { |
64f40ff5 ED |
246 | union tcp_cc_info info; |
247 | size_t sz = 0; | |
248 | int attr; | |
521f1cf1 ED |
249 | |
250 | rcu_read_lock(); | |
251 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
252 | if (ca_ops && ca_ops->get_info) | |
64f40ff5 | 253 | sz = ca_ops->get_info(sk, ext, &attr, &info); |
521f1cf1 | 254 | rcu_read_unlock(); |
64f40ff5 | 255 | if (sz && nla_put(skb, attr, sz, &info) < 0) |
521f1cf1 ED |
256 | goto errout; |
257 | } | |
1da177e4 | 258 | |
3c4d05c8 | 259 | out: |
053c095a JB |
260 | nlmsg_end(skb, nlh); |
261 | return 0; | |
1da177e4 | 262 | |
6e277ed5 TG |
263 | errout: |
264 | nlmsg_cancel(skb, nlh); | |
26932566 | 265 | return -EMSGSIZE; |
1da177e4 | 266 | } |
3c4d05c8 PE |
267 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
268 | ||
269 | static int inet_csk_diag_fill(struct sock *sk, | |
e31c5e0e | 270 | struct sk_buff *skb, |
34160ea3 | 271 | const struct inet_diag_req_v2 *req, |
d06ca956 | 272 | struct user_namespace *user_ns, |
15e47304 | 273 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
274 | const struct nlmsghdr *unlh) |
275 | { | |
e31c5e0e ED |
276 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, |
277 | user_ns, portid, seq, nlmsg_flags, unlh); | |
3c4d05c8 | 278 | } |
1da177e4 | 279 | |
33cf7c90 | 280 | static int inet_twsk_diag_fill(struct sock *sk, |
e31c5e0e | 281 | struct sk_buff *skb, |
15e47304 | 282 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
283 | const struct nlmsghdr *unlh) |
284 | { | |
33cf7c90 | 285 | struct inet_timewait_sock *tw = inet_twsk(sk); |
c7d58aab | 286 | struct inet_diag_msg *r; |
6e277ed5 | 287 | struct nlmsghdr *nlh; |
789f558c | 288 | long tmo; |
d106352d | 289 | |
15e47304 | 290 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
291 | nlmsg_flags); |
292 | if (!nlh) | |
d106352d | 293 | return -EMSGSIZE; |
c7d58aab | 294 | |
d106352d | 295 | r = nlmsg_data(nlh); |
c7d58aab ACM |
296 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
297 | ||
789f558c | 298 | tmo = tw->tw_timer.expires - jiffies; |
c7d58aab ACM |
299 | if (tmo < 0) |
300 | tmo = 0; | |
301 | ||
a4458343 | 302 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 303 | r->idiag_retrans = 0; |
b1aac815 | 304 | |
c7d58aab ACM |
305 | r->idiag_state = tw->tw_substate; |
306 | r->idiag_timer = 3; | |
96f817fe | 307 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
308 | r->idiag_rqueue = 0; |
309 | r->idiag_wqueue = 0; | |
310 | r->idiag_uid = 0; | |
311 | r->idiag_inode = 0; | |
6e277ed5 | 312 | |
053c095a JB |
313 | nlmsg_end(skb, nlh); |
314 | return 0; | |
c7d58aab ACM |
315 | } |
316 | ||
a58917f5 ED |
317 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
318 | u32 portid, u32 seq, u16 nlmsg_flags, | |
319 | const struct nlmsghdr *unlh) | |
320 | { | |
321 | struct inet_diag_msg *r; | |
322 | struct nlmsghdr *nlh; | |
323 | long tmo; | |
324 | ||
325 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
326 | nlmsg_flags); | |
327 | if (!nlh) | |
328 | return -EMSGSIZE; | |
329 | ||
330 | r = nlmsg_data(nlh); | |
331 | inet_diag_msg_common_fill(r, sk); | |
332 | r->idiag_state = TCP_SYN_RECV; | |
333 | r->idiag_timer = 1; | |
334 | r->idiag_retrans = inet_reqsk(sk)->num_retrans; | |
335 | ||
336 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
337 | offsetof(struct sock, sk_cookie)); | |
338 | ||
fa76ce73 | 339 | tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; |
a58917f5 ED |
340 | r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0; |
341 | r->idiag_rqueue = 0; | |
342 | r->idiag_wqueue = 0; | |
343 | r->idiag_uid = 0; | |
344 | r->idiag_inode = 0; | |
345 | ||
346 | nlmsg_end(skb, nlh); | |
347 | return 0; | |
348 | } | |
349 | ||
dff2c035 | 350 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 351 | const struct inet_diag_req_v2 *r, |
d06ca956 | 352 | struct user_namespace *user_ns, |
15e47304 | 353 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
354 | const struct nlmsghdr *unlh) |
355 | { | |
356 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 357 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
358 | nlmsg_flags, unlh); |
359 | ||
a58917f5 ED |
360 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
361 | return inet_req_diag_fill(sk, skb, portid, seq, | |
362 | nlmsg_flags, unlh); | |
363 | ||
efe4208f ED |
364 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
365 | nlmsg_flags, unlh); | |
dff2c035 ACM |
366 | } |
367 | ||
b613f56e LC |
368 | struct sock *inet_diag_find_one_icsk(struct net *net, |
369 | struct inet_hashinfo *hashinfo, | |
370 | const struct inet_diag_req_v2 *req) | |
1da177e4 | 371 | { |
e31c5e0e | 372 | struct sock *sk; |
d523a328 | 373 | |
2d331915 | 374 | rcu_read_lock(); |
e31c5e0e | 375 | if (req->sdiag_family == AF_INET) |
a583636a | 376 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0], |
73c1f4a0 ACM |
377 | req->id.idiag_dport, req->id.idiag_src[0], |
378 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 379 | #if IS_ENABLED(CONFIG_IPV6) |
7c130672 ED |
380 | else if (req->sdiag_family == AF_INET6) { |
381 | if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) && | |
382 | ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src)) | |
a583636a | 383 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3], |
7c130672 ED |
384 | req->id.idiag_dport, req->id.idiag_src[3], |
385 | req->id.idiag_sport, req->id.idiag_if); | |
386 | else | |
a583636a | 387 | sk = inet6_lookup(net, hashinfo, NULL, 0, |
7c130672 ED |
388 | (struct in6_addr *)req->id.idiag_dst, |
389 | req->id.idiag_dport, | |
390 | (struct in6_addr *)req->id.idiag_src, | |
391 | req->id.idiag_sport, | |
392 | req->id.idiag_if); | |
393 | } | |
1da177e4 | 394 | #endif |
2d331915 ED |
395 | else { |
396 | rcu_read_unlock(); | |
b613f56e | 397 | return ERR_PTR(-EINVAL); |
2d331915 ED |
398 | } |
399 | rcu_read_unlock(); | |
e31c5e0e | 400 | if (!sk) |
b613f56e | 401 | return ERR_PTR(-ENOENT); |
1da177e4 | 402 | |
b613f56e LC |
403 | if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) { |
404 | sock_gen_put(sk); | |
405 | return ERR_PTR(-ENOENT); | |
406 | } | |
407 | ||
408 | return sk; | |
409 | } | |
410 | EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk); | |
411 | ||
412 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, | |
413 | struct sk_buff *in_skb, | |
414 | const struct nlmsghdr *nlh, | |
415 | const struct inet_diag_req_v2 *req) | |
416 | { | |
417 | struct net *net = sock_net(in_skb->sk); | |
418 | struct sk_buff *rep; | |
419 | struct sock *sk; | |
420 | int err; | |
421 | ||
422 | sk = inet_diag_find_one_icsk(net, hashinfo, req); | |
423 | if (IS_ERR(sk)) | |
424 | return PTR_ERR(sk); | |
1da177e4 | 425 | |
c8e2c80d | 426 | rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL); |
6e277ed5 TG |
427 | if (!rep) { |
428 | err = -ENOMEM; | |
1da177e4 | 429 | goto out; |
6e277ed5 | 430 | } |
1da177e4 | 431 | |
a029fe26 | 432 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 433 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 434 | NETLINK_CB(in_skb).portid, |
26932566 PM |
435 | nlh->nlmsg_seq, 0, nlh); |
436 | if (err < 0) { | |
437 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 438 | nlmsg_free(rep); |
26932566 PM |
439 | goto out; |
440 | } | |
15e47304 | 441 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 442 | MSG_DONTWAIT); |
1da177e4 LT |
443 | if (err > 0) |
444 | err = 0; | |
445 | ||
446 | out: | |
c1d607cc ED |
447 | if (sk) |
448 | sock_gen_put(sk); | |
449 | ||
476f7dbf PE |
450 | return err; |
451 | } | |
1942c518 | 452 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf | 453 | |
6eb5d2e0 | 454 | static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb, |
476f7dbf | 455 | const struct nlmsghdr *nlh, |
34160ea3 | 456 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
457 | { |
458 | const struct inet_diag_handler *handler; | |
459 | int err; | |
460 | ||
461 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
462 | if (IS_ERR(handler)) | |
463 | err = PTR_ERR(handler); | |
6eb5d2e0 | 464 | else if (cmd == SOCK_DIAG_BY_FAMILY) |
1942c518 | 465 | err = handler->dump_one(in_skb, nlh, req); |
6eb5d2e0 LC |
466 | else if (cmd == SOCK_DESTROY && handler->destroy) |
467 | err = handler->destroy(in_skb, req); | |
468 | else | |
469 | err = -EOPNOTSUPP; | |
d523a328 | 470 | inet_diag_unlock_handler(handler); |
476f7dbf | 471 | |
1da177e4 LT |
472 | return err; |
473 | } | |
474 | ||
9f855299 | 475 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
476 | { |
477 | int words = bits >> 5; | |
478 | ||
479 | bits &= 0x1f; | |
480 | ||
481 | if (words) { | |
482 | if (memcmp(a1, a2, words << 2)) | |
483 | return 0; | |
484 | } | |
485 | if (bits) { | |
9f855299 AV |
486 | __be32 w1, w2; |
487 | __be32 mask; | |
1da177e4 LT |
488 | |
489 | w1 = a1[words]; | |
490 | w2 = a2[words]; | |
491 | ||
492 | mask = htonl((0xffffffff) << (32 - bits)); | |
493 | ||
494 | if ((w1 ^ w2) & mask) | |
495 | return 0; | |
496 | } | |
497 | ||
498 | return 1; | |
499 | } | |
500 | ||
87c22ea5 | 501 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 502 | const struct inet_diag_entry *entry) |
1da177e4 | 503 | { |
87c22ea5 PE |
504 | const void *bc = nla_data(_bc); |
505 | int len = nla_len(_bc); | |
506 | ||
1da177e4 LT |
507 | while (len > 0) { |
508 | int yes = 1; | |
73c1f4a0 | 509 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
510 | |
511 | switch (op->code) { | |
73c1f4a0 | 512 | case INET_DIAG_BC_NOP: |
1da177e4 | 513 | break; |
73c1f4a0 | 514 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
515 | yes = 0; |
516 | break; | |
73c1f4a0 | 517 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
518 | yes = entry->sport >= op[1].no; |
519 | break; | |
73c1f4a0 | 520 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 521 | yes = entry->sport <= op[1].no; |
1da177e4 | 522 | break; |
73c1f4a0 | 523 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
524 | yes = entry->dport >= op[1].no; |
525 | break; | |
73c1f4a0 | 526 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
527 | yes = entry->dport <= op[1].no; |
528 | break; | |
73c1f4a0 | 529 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
530 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
531 | break; | |
73c1f4a0 | 532 | case INET_DIAG_BC_S_COND: |
a8c2190e | 533 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
534 | const struct inet_diag_hostcond *cond; |
535 | const __be32 *addr; | |
1da177e4 | 536 | |
e31c5e0e | 537 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 538 | if (cond->port != -1 && |
73c1f4a0 | 539 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
540 | entry->sport : entry->dport)) { |
541 | yes = 0; | |
542 | break; | |
543 | } | |
4e852c02 | 544 | |
73c1f4a0 | 545 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
546 | addr = entry->saddr; |
547 | else | |
548 | addr = entry->daddr; | |
549 | ||
f67caec9 NC |
550 | if (cond->family != AF_UNSPEC && |
551 | cond->family != entry->family) { | |
552 | if (entry->family == AF_INET6 && | |
553 | cond->family == AF_INET) { | |
554 | if (addr[0] == 0 && addr[1] == 0 && | |
555 | addr[2] == htonl(0xffff) && | |
556 | bitstring_match(addr + 3, | |
557 | cond->addr, | |
558 | cond->prefix_len)) | |
559 | break; | |
560 | } | |
561 | yes = 0; | |
562 | break; | |
563 | } | |
564 | ||
565 | if (cond->prefix_len == 0) | |
566 | break; | |
4e852c02 ACM |
567 | if (bitstring_match(addr, cond->addr, |
568 | cond->prefix_len)) | |
1da177e4 | 569 | break; |
1da177e4 LT |
570 | yes = 0; |
571 | break; | |
572 | } | |
573 | } | |
574 | ||
4e852c02 | 575 | if (yes) { |
1da177e4 LT |
576 | len -= op->yes; |
577 | bc += op->yes; | |
578 | } else { | |
579 | len -= op->no; | |
580 | bc += op->no; | |
581 | } | |
582 | } | |
a02cec21 | 583 | return len == 0; |
1da177e4 LT |
584 | } |
585 | ||
a4458343 ED |
586 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
587 | */ | |
588 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
589 | const struct sock *sk) | |
590 | { | |
591 | #if IS_ENABLED(CONFIG_IPV6) | |
592 | if (sk->sk_family == AF_INET6) { | |
593 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
594 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
595 | } else | |
596 | #endif | |
597 | { | |
598 | entry->saddr = &sk->sk_rcv_saddr; | |
599 | entry->daddr = &sk->sk_daddr; | |
600 | } | |
601 | } | |
602 | ||
8d07d151 PE |
603 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
604 | { | |
8d07d151 | 605 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 606 | struct inet_diag_entry entry; |
8d07d151 | 607 | |
e31c5e0e | 608 | if (!bc) |
8d07d151 PE |
609 | return 1; |
610 | ||
611 | entry.family = sk->sk_family; | |
a4458343 | 612 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
613 | entry.sport = inet->inet_num; |
614 | entry.dport = ntohs(inet->inet_dport); | |
a58917f5 | 615 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
8d07d151 PE |
616 | |
617 | return inet_diag_bc_run(bc, &entry); | |
618 | } | |
619 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
620 | ||
1da177e4 LT |
621 | static int valid_cc(const void *bc, int len, int cc) |
622 | { | |
623 | while (len >= 0) { | |
73c1f4a0 | 624 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
625 | |
626 | if (cc > len) | |
627 | return 0; | |
628 | if (cc == len) | |
629 | return 1; | |
eeb14972 | 630 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
631 | return 0; |
632 | len -= op->yes; | |
633 | bc += op->yes; | |
634 | } | |
635 | return 0; | |
636 | } | |
637 | ||
405c0059 NC |
638 | /* Validate an inet_diag_hostcond. */ |
639 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
640 | int *min_len) | |
641 | { | |
405c0059 | 642 | struct inet_diag_hostcond *cond; |
e31c5e0e | 643 | int addr_len; |
405c0059 NC |
644 | |
645 | /* Check hostcond space. */ | |
646 | *min_len += sizeof(struct inet_diag_hostcond); | |
647 | if (len < *min_len) | |
648 | return false; | |
649 | cond = (struct inet_diag_hostcond *)(op + 1); | |
650 | ||
651 | /* Check address family and address length. */ | |
652 | switch (cond->family) { | |
653 | case AF_UNSPEC: | |
654 | addr_len = 0; | |
655 | break; | |
656 | case AF_INET: | |
657 | addr_len = sizeof(struct in_addr); | |
658 | break; | |
659 | case AF_INET6: | |
660 | addr_len = sizeof(struct in6_addr); | |
661 | break; | |
662 | default: | |
663 | return false; | |
664 | } | |
665 | *min_len += addr_len; | |
666 | if (len < *min_len) | |
667 | return false; | |
668 | ||
669 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
670 | if (cond->prefix_len > 8 * addr_len) | |
671 | return false; | |
672 | ||
673 | return true; | |
674 | } | |
675 | ||
5e1f5420 | 676 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
677 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
678 | int len, int *min_len) | |
5e1f5420 NC |
679 | { |
680 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
681 | *min_len += sizeof(struct inet_diag_bc_op); | |
682 | if (len < *min_len) | |
683 | return false; | |
684 | return true; | |
685 | } | |
686 | ||
73c1f4a0 | 687 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 688 | { |
eeb14972 | 689 | const void *bc = bytecode; |
1da177e4 LT |
690 | int len = bytecode_len; |
691 | ||
692 | while (len > 0) { | |
405c0059 | 693 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 694 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 695 | |
1da177e4 | 696 | switch (op->code) { |
73c1f4a0 ACM |
697 | case INET_DIAG_BC_S_COND: |
698 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
699 | if (!valid_hostcond(bc, len, &min_len)) |
700 | return -EINVAL; | |
5e1f5420 | 701 | break; |
73c1f4a0 ACM |
702 | case INET_DIAG_BC_S_GE: |
703 | case INET_DIAG_BC_S_LE: | |
704 | case INET_DIAG_BC_D_GE: | |
705 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 706 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
707 | return -EINVAL; |
708 | break; | |
5e1f5420 NC |
709 | case INET_DIAG_BC_AUTO: |
710 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 711 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
712 | break; |
713 | default: | |
714 | return -EINVAL; | |
715 | } | |
5e1f5420 NC |
716 | |
717 | if (op->code != INET_DIAG_BC_NOP) { | |
718 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
719 | return -EINVAL; | |
720 | if (op->no < len && | |
721 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
722 | return -EINVAL; | |
723 | } | |
724 | ||
405c0059 | 725 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 726 | return -EINVAL; |
4e852c02 | 727 | bc += op->yes; |
1da177e4 LT |
728 | len -= op->yes; |
729 | } | |
730 | return len == 0 ? 0 : -EINVAL; | |
731 | } | |
732 | ||
dff2c035 ACM |
733 | static int inet_csk_diag_dump(struct sock *sk, |
734 | struct sk_buff *skb, | |
37f352b5 | 735 | struct netlink_callback *cb, |
34160ea3 | 736 | const struct inet_diag_req_v2 *r, |
37f352b5 | 737 | const struct nlattr *bc) |
1da177e4 | 738 | { |
8d07d151 PE |
739 | if (!inet_diag_bc_sk(bc, sk)) |
740 | return 0; | |
1da177e4 | 741 | |
a029fe26 | 742 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 743 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 744 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 745 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
746 | } |
747 | ||
49612729 ED |
748 | static void twsk_build_assert(void) |
749 | { | |
750 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
751 | offsetof(struct sock, sk_family)); | |
752 | ||
753 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
754 | offsetof(struct inet_sock, inet_num)); | |
755 | ||
756 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
757 | offsetof(struct inet_sock, inet_dport)); | |
758 | ||
759 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
760 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
761 | ||
762 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
763 | offsetof(struct inet_sock, inet_daddr)); | |
764 | ||
765 | #if IS_ENABLED(CONFIG_IPV6) | |
766 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
767 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
768 | ||
769 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
770 | offsetof(struct sock, sk_v6_daddr)); | |
771 | #endif | |
772 | } | |
773 | ||
1942c518 | 774 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
e31c5e0e | 775 | struct netlink_callback *cb, |
34160ea3 | 776 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 | 777 | { |
51d7cccf | 778 | struct net *net = sock_net(skb->sk); |
e31c5e0e | 779 | int i, num, s_i, s_num; |
079096f1 | 780 | u32 idiag_states = r->idiag_states; |
4e852c02 | 781 | |
079096f1 ED |
782 | if (idiag_states & TCPF_SYN_RECV) |
783 | idiag_states |= TCPF_NEW_SYN_RECV; | |
1da177e4 LT |
784 | s_i = cb->args[1]; |
785 | s_num = num = cb->args[2]; | |
4f5736c4 | 786 | |
1da177e4 | 787 | if (cb->args[0] == 0) { |
079096f1 | 788 | if (!(idiag_states & TCPF_LISTEN)) |
1da177e4 | 789 | goto skip_listen_ht; |
540722ff | 790 | |
0f7ff927 | 791 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 792 | struct inet_listen_hashbucket *ilb; |
e31c5e0e | 793 | struct sock *sk; |
1da177e4 LT |
794 | |
795 | num = 0; | |
5caea4ea ED |
796 | ilb = &hashinfo->listening_hash[i]; |
797 | spin_lock_bh(&ilb->lock); | |
3b24d854 | 798 | sk_for_each(sk, &ilb->head) { |
1da177e4 LT |
799 | struct inet_sock *inet = inet_sk(sk); |
800 | ||
51d7cccf AV |
801 | if (!net_eq(sock_net(sk), net)) |
802 | continue; | |
803 | ||
1da177e4 LT |
804 | if (num < s_num) { |
805 | num++; | |
806 | continue; | |
807 | } | |
808 | ||
d23deaa0 | 809 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 810 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
811 | goto next_listen; |
812 | ||
c720c7e8 | 813 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 814 | r->id.idiag_sport) |
1da177e4 LT |
815 | goto next_listen; |
816 | ||
079096f1 | 817 | if (r->id.idiag_dport || |
1da177e4 | 818 | cb->args[3] > 0) |
1da177e4 LT |
819 | goto next_listen; |
820 | ||
079096f1 | 821 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 822 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
823 | goto done; |
824 | } | |
825 | ||
826 | next_listen: | |
827 | cb->args[3] = 0; | |
828 | cb->args[4] = 0; | |
829 | ++num; | |
830 | } | |
5caea4ea | 831 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
832 | |
833 | s_num = 0; | |
834 | cb->args[3] = 0; | |
835 | cb->args[4] = 0; | |
836 | } | |
1da177e4 LT |
837 | skip_listen_ht: |
838 | cb->args[0] = 1; | |
839 | s_i = num = s_num = 0; | |
840 | } | |
841 | ||
079096f1 | 842 | if (!(idiag_states & ~TCPF_LISTEN)) |
efb3cb42 | 843 | goto out; |
1da177e4 | 844 | |
f373b53b | 845 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 846 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 847 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 848 | struct hlist_nulls_node *node; |
e31c5e0e | 849 | struct sock *sk; |
1da177e4 | 850 | |
6be547a6 AK |
851 | num = 0; |
852 | ||
05dbc7b5 | 853 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
854 | continue; |
855 | ||
1da177e4 LT |
856 | if (i > s_i) |
857 | s_num = 0; | |
858 | ||
7e3aab4a | 859 | spin_lock_bh(lock); |
3ab5aee7 | 860 | sk_nulls_for_each(sk, node, &head->chain) { |
e31c5e0e | 861 | int state, res; |
1da177e4 | 862 | |
51d7cccf AV |
863 | if (!net_eq(sock_net(sk), net)) |
864 | continue; | |
1da177e4 LT |
865 | if (num < s_num) |
866 | goto next_normal; | |
70315d22 NC |
867 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
868 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
079096f1 | 869 | if (!(idiag_states & (1 << state))) |
1da177e4 | 870 | goto next_normal; |
d23deaa0 | 871 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 872 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 873 | goto next_normal; |
05dbc7b5 | 874 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 875 | r->id.idiag_sport) |
1da177e4 | 876 | goto next_normal; |
05dbc7b5 | 877 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 878 | r->id.idiag_dport) |
1da177e4 | 879 | goto next_normal; |
a58917f5 ED |
880 | twsk_build_assert(); |
881 | ||
882 | if (!inet_diag_bc_sk(bc, sk)) | |
883 | goto next_normal; | |
884 | ||
885 | res = sk_diag_fill(sk, skb, r, | |
886 | sk_user_ns(NETLINK_CB(cb->skb).sk), | |
887 | NETLINK_CB(cb->skb).portid, | |
888 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
889 | cb->nlh); | |
05dbc7b5 | 890 | if (res < 0) { |
7e3aab4a | 891 | spin_unlock_bh(lock); |
1da177e4 LT |
892 | goto done; |
893 | } | |
894 | next_normal: | |
895 | ++num; | |
896 | } | |
897 | ||
7e3aab4a | 898 | spin_unlock_bh(lock); |
acffb584 | 899 | cond_resched(); |
1da177e4 LT |
900 | } |
901 | ||
902 | done: | |
903 | cb->args[1] = i; | |
904 | cb->args[2] = num; | |
efb3cb42 PE |
905 | out: |
906 | ; | |
907 | } | |
1942c518 | 908 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
909 | |
910 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
34160ea3 | 911 | const struct inet_diag_req_v2 *r, |
e31c5e0e | 912 | struct nlattr *bc) |
efb3cb42 PE |
913 | { |
914 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 915 | int err = 0; |
efb3cb42 PE |
916 | |
917 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
918 | if (!IS_ERR(handler)) | |
1942c518 | 919 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
920 | else |
921 | err = PTR_ERR(handler); | |
d523a328 | 922 | inet_diag_unlock_handler(handler); |
efb3cb42 | 923 | |
cacb6ba0 | 924 | return err ? : skb->len; |
1da177e4 LT |
925 | } |
926 | ||
25c4cd2b PE |
927 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
928 | { | |
c8991362 | 929 | int hdrlen = sizeof(struct inet_diag_req_v2); |
e31c5e0e | 930 | struct nlattr *bc = NULL; |
25c4cd2b PE |
931 | |
932 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
933 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
934 | ||
d106352d | 935 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
936 | } |
937 | ||
e31c5e0e | 938 | static int inet_diag_type2proto(int type) |
a029fe26 PE |
939 | { |
940 | switch (type) { | |
941 | case TCPDIAG_GETSOCK: | |
942 | return IPPROTO_TCP; | |
943 | case DCCPDIAG_GETSOCK: | |
944 | return IPPROTO_DCCP; | |
945 | default: | |
946 | return 0; | |
947 | } | |
948 | } | |
949 | ||
e31c5e0e ED |
950 | static int inet_diag_dump_compat(struct sk_buff *skb, |
951 | struct netlink_callback *cb) | |
25c4cd2b | 952 | { |
d106352d | 953 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
e31c5e0e | 954 | int hdrlen = sizeof(struct inet_diag_req); |
c8991362 | 955 | struct inet_diag_req_v2 req; |
25c4cd2b | 956 | struct nlattr *bc = NULL; |
25c4cd2b | 957 | |
d23deaa0 | 958 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
959 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
960 | req.idiag_ext = rc->idiag_ext; | |
961 | req.idiag_states = rc->idiag_states; | |
962 | req.id = rc->id; | |
963 | ||
964 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
965 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
966 | ||
967 | return __inet_diag_dump(skb, cb, &req, bc); | |
968 | } | |
969 | ||
fe50ce28 | 970 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
e31c5e0e | 971 | const struct nlmsghdr *nlh) |
fe50ce28 | 972 | { |
d106352d | 973 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 974 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
975 | |
976 | req.sdiag_family = rc->idiag_family; | |
977 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
978 | req.idiag_ext = rc->idiag_ext; | |
979 | req.idiag_states = rc->idiag_states; | |
980 | req.id = rc->id; | |
981 | ||
6eb5d2e0 | 982 | return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req); |
fe50ce28 PE |
983 | } |
984 | ||
8d34172d | 985 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 986 | { |
3b09c84c | 987 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 988 | struct net *net = sock_net(skb->sk); |
1da177e4 | 989 | |
ead592ba TG |
990 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
991 | nlmsg_len(nlh) < hdrlen) | |
992 | return -EINVAL; | |
1da177e4 | 993 | |
b8f3ab42 | 994 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
995 | if (nlmsg_attrlen(nlh, hdrlen)) { |
996 | struct nlattr *attr; | |
1da177e4 | 997 | |
ead592ba TG |
998 | attr = nlmsg_find_attr(nlh, hdrlen, |
999 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1000 | if (!attr || |
ead592ba TG |
1001 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1002 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1003 | return -EINVAL; | |
1004 | } | |
80d326fa PNA |
1005 | { |
1006 | struct netlink_dump_control c = { | |
1007 | .dump = inet_diag_dump_compat, | |
1008 | }; | |
51d7cccf | 1009 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1010 | } |
1da177e4 | 1011 | } |
ead592ba | 1012 | |
fe50ce28 | 1013 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1014 | } |
1015 | ||
6eb5d2e0 | 1016 | static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h) |
d366477a | 1017 | { |
c8991362 | 1018 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1019 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1020 | |
1021 | if (nlmsg_len(h) < hdrlen) | |
1022 | return -EINVAL; | |
1023 | ||
6eb5d2e0 LC |
1024 | if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY && |
1025 | h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1026 | if (nlmsg_attrlen(h, hdrlen)) { |
1027 | struct nlattr *attr; | |
e31c5e0e | 1028 | |
25c4cd2b PE |
1029 | attr = nlmsg_find_attr(h, hdrlen, |
1030 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1031 | if (!attr || |
25c4cd2b PE |
1032 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1033 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1034 | return -EINVAL; | |
1035 | } | |
80d326fa PNA |
1036 | { |
1037 | struct netlink_dump_control c = { | |
1038 | .dump = inet_diag_dump, | |
1039 | }; | |
51d7cccf | 1040 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1041 | } |
d366477a PE |
1042 | } |
1043 | ||
6eb5d2e0 | 1044 | return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h)); |
d366477a PE |
1045 | } |
1046 | ||
35ac838a CG |
1047 | static |
1048 | int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk) | |
1049 | { | |
1050 | const struct inet_diag_handler *handler; | |
1051 | struct nlmsghdr *nlh; | |
1052 | struct nlattr *attr; | |
1053 | struct inet_diag_msg *r; | |
1054 | void *info = NULL; | |
1055 | int err = 0; | |
1056 | ||
1057 | nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0); | |
1058 | if (!nlh) | |
1059 | return -ENOMEM; | |
1060 | ||
1061 | r = nlmsg_data(nlh); | |
1062 | memset(r, 0, sizeof(*r)); | |
1063 | inet_diag_msg_common_fill(r, sk); | |
e0df02e0 CG |
1064 | if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM) |
1065 | r->id.idiag_sport = inet_sk(sk)->inet_sport; | |
35ac838a CG |
1066 | r->idiag_state = sk->sk_state; |
1067 | ||
1068 | if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) { | |
1069 | nlmsg_cancel(skb, nlh); | |
1070 | return err; | |
1071 | } | |
1072 | ||
1073 | handler = inet_diag_lock_handler(sk->sk_protocol); | |
1074 | if (IS_ERR(handler)) { | |
1075 | inet_diag_unlock_handler(handler); | |
1076 | nlmsg_cancel(skb, nlh); | |
1077 | return PTR_ERR(handler); | |
1078 | } | |
1079 | ||
1080 | attr = handler->idiag_info_size | |
1081 | ? nla_reserve(skb, INET_DIAG_INFO, handler->idiag_info_size) | |
1082 | : NULL; | |
1083 | if (attr) | |
1084 | info = nla_data(attr); | |
1085 | ||
1086 | handler->idiag_get_info(sk, r, info); | |
1087 | inet_diag_unlock_handler(handler); | |
1088 | ||
1089 | nlmsg_end(skb, nlh); | |
1090 | return 0; | |
1091 | } | |
1092 | ||
8dcf01fc | 1093 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a | 1094 | .family = AF_INET, |
6eb5d2e0 | 1095 | .dump = inet_diag_handler_cmd, |
35ac838a | 1096 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1097 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1098 | }; |
1099 | ||
8dcf01fc | 1100 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a | 1101 | .family = AF_INET6, |
6eb5d2e0 | 1102 | .dump = inet_diag_handler_cmd, |
35ac838a | 1103 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1104 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1105 | }; |
1106 | ||
4f5736c4 ACM |
1107 | int inet_diag_register(const struct inet_diag_handler *h) |
1108 | { | |
1109 | const __u16 type = h->idiag_type; | |
1110 | int err = -EINVAL; | |
1111 | ||
f13c95f0 | 1112 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1113 | goto out; |
1114 | ||
d523a328 | 1115 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1116 | err = -EEXIST; |
e31c5e0e | 1117 | if (!inet_diag_table[type]) { |
4f5736c4 ACM |
1118 | inet_diag_table[type] = h; |
1119 | err = 0; | |
1120 | } | |
d523a328 | 1121 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1122 | out: |
1123 | return err; | |
1124 | } | |
1125 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1126 | ||
1127 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1128 | { | |
1129 | const __u16 type = h->idiag_type; | |
1130 | ||
f13c95f0 | 1131 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1132 | return; |
1133 | ||
d523a328 | 1134 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1135 | inet_diag_table[type] = NULL; |
d523a328 | 1136 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1137 | } |
1138 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1139 | ||
73c1f4a0 | 1140 | static int __init inet_diag_init(void) |
1da177e4 | 1141 | { |
f13c95f0 | 1142 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1143 | sizeof(struct inet_diag_handler *)); |
1144 | int err = -ENOMEM; | |
1145 | ||
0da974f4 | 1146 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1147 | if (!inet_diag_table) |
1148 | goto out; | |
1149 | ||
d366477a PE |
1150 | err = sock_diag_register(&inet_diag_handler); |
1151 | if (err) | |
1152 | goto out_free_nl; | |
1153 | ||
1154 | err = sock_diag_register(&inet6_diag_handler); | |
1155 | if (err) | |
1156 | goto out_free_inet; | |
1157 | ||
8ef874bf | 1158 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1159 | out: |
1160 | return err; | |
d366477a PE |
1161 | |
1162 | out_free_inet: | |
1163 | sock_diag_unregister(&inet_diag_handler); | |
1164 | out_free_nl: | |
4f5736c4 ACM |
1165 | kfree(inet_diag_table); |
1166 | goto out; | |
1da177e4 LT |
1167 | } |
1168 | ||
73c1f4a0 | 1169 | static void __exit inet_diag_exit(void) |
1da177e4 | 1170 | { |
d366477a PE |
1171 | sock_diag_unregister(&inet6_diag_handler); |
1172 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1173 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1174 | kfree(inet_diag_table); |
1da177e4 LT |
1175 | } |
1176 | ||
73c1f4a0 ACM |
1177 | module_init(inet_diag_init); |
1178 | module_exit(inet_diag_exit); | |
1da177e4 | 1179 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1180 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1181 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |