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; | |
637c841d | 47 | u32 ifindex; |
a52e95ab | 48 | u32 mark; |
1da177e4 LT |
49 | }; |
50 | ||
d523a328 HX |
51 | static DEFINE_MUTEX(inet_diag_table_mutex); |
52 | ||
f13c95f0 | 53 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 54 | { |
f13c95f0 | 55 | if (!inet_diag_table[proto]) |
bf2ae2e4 | 56 | sock_load_diag_module(AF_INET, proto); |
d523a328 HX |
57 | |
58 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 59 | if (!inet_diag_table[proto]) |
d523a328 HX |
60 | return ERR_PTR(-ENOENT); |
61 | ||
f13c95f0 | 62 | return inet_diag_table[proto]; |
d523a328 HX |
63 | } |
64 | ||
e31c5e0e | 65 | static void inet_diag_unlock_handler(const struct inet_diag_handler *handler) |
d523a328 HX |
66 | { |
67 | mutex_unlock(&inet_diag_table_mutex); | |
68 | } | |
69 | ||
cb2050a7 | 70 | void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) |
a4458343 ED |
71 | { |
72 | r->idiag_family = sk->sk_family; | |
73 | ||
74 | r->id.idiag_sport = htons(sk->sk_num); | |
75 | r->id.idiag_dport = sk->sk_dport; | |
76 | r->id.idiag_if = sk->sk_bound_dev_if; | |
77 | sock_diag_save_cookie(sk, r->id.idiag_cookie); | |
78 | ||
79 | #if IS_ENABLED(CONFIG_IPV6) | |
80 | if (sk->sk_family == AF_INET6) { | |
81 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; | |
82 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; | |
83 | } else | |
84 | #endif | |
85 | { | |
86 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
87 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
88 | ||
89 | r->id.idiag_src[0] = sk->sk_rcv_saddr; | |
90 | r->id.idiag_dst[0] = sk->sk_daddr; | |
91 | } | |
92 | } | |
cb2050a7 | 93 | EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill); |
a4458343 | 94 | |
b37e8840 ID |
95 | static size_t inet_sk_attr_size(struct sock *sk, |
96 | const struct inet_diag_req_v2 *req, | |
97 | bool net_admin) | |
c8e2c80d | 98 | { |
b37e8840 ID |
99 | const struct inet_diag_handler *handler; |
100 | size_t aux = 0; | |
101 | ||
102 | handler = inet_diag_table[req->sdiag_protocol]; | |
103 | if (handler && handler->idiag_get_aux_size) | |
104 | aux = handler->idiag_get_aux_size(sk, net_admin); | |
105 | ||
c8e2c80d ED |
106 | return nla_total_size(sizeof(struct tcp_info)) |
107 | + nla_total_size(1) /* INET_DIAG_SHUTDOWN */ | |
108 | + nla_total_size(1) /* INET_DIAG_TOS */ | |
109 | + nla_total_size(1) /* INET_DIAG_TCLASS */ | |
d545caca | 110 | + nla_total_size(4) /* INET_DIAG_MARK */ |
c8e2c80d ED |
111 | + nla_total_size(sizeof(struct inet_diag_meminfo)) |
112 | + nla_total_size(sizeof(struct inet_diag_msg)) | |
113 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) | |
114 | + nla_total_size(TCP_CA_NAME_MAX) | |
115 | + nla_total_size(sizeof(struct tcpvegas_info)) | |
b37e8840 | 116 | + aux |
c8e2c80d ED |
117 | + 64; |
118 | } | |
119 | ||
cb2050a7 XL |
120 | int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb, |
121 | struct inet_diag_msg *r, int ext, | |
d545caca LC |
122 | struct user_namespace *user_ns, |
123 | bool net_admin) | |
cb2050a7 XL |
124 | { |
125 | const struct inet_sock *inet = inet_sk(sk); | |
126 | ||
127 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) | |
128 | goto errout; | |
129 | ||
130 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, | |
131 | * hence this needs to be included regardless of socket family. | |
132 | */ | |
133 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
134 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) | |
135 | goto errout; | |
136 | ||
137 | #if IS_ENABLED(CONFIG_IPV6) | |
138 | if (r->idiag_family == AF_INET6) { | |
139 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) | |
140 | if (nla_put_u8(skb, INET_DIAG_TCLASS, | |
141 | inet6_sk(sk)->tclass) < 0) | |
142 | goto errout; | |
143 | ||
144 | if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
145 | nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk))) | |
146 | goto errout; | |
147 | } | |
148 | #endif | |
149 | ||
d545caca LC |
150 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark)) |
151 | goto errout; | |
152 | ||
cb2050a7 XL |
153 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
154 | r->idiag_inode = sock_i_ino(sk); | |
155 | ||
156 | return 0; | |
157 | errout: | |
158 | return 1; | |
159 | } | |
160 | EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill); | |
161 | ||
3c4d05c8 | 162 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 163 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
164 | struct user_namespace *user_ns, |
165 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca LC |
166 | const struct nlmsghdr *unlh, |
167 | bool net_admin) | |
1da177e4 | 168 | { |
521f1cf1 | 169 | const struct tcp_congestion_ops *ca_ops; |
e31c5e0e ED |
170 | const struct inet_diag_handler *handler; |
171 | int ext = req->idiag_ext; | |
73c1f4a0 | 172 | struct inet_diag_msg *r; |
1da177e4 | 173 | struct nlmsghdr *nlh; |
6e277ed5 | 174 | struct nlattr *attr; |
4f5736c4 | 175 | void *info = NULL; |
4f5736c4 | 176 | |
a029fe26 | 177 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 178 | BUG_ON(!handler); |
1da177e4 | 179 | |
15e47304 | 180 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
181 | nlmsg_flags); |
182 | if (!nlh) | |
d106352d | 183 | return -EMSGSIZE; |
4f5736c4 | 184 | |
d106352d | 185 | r = nlmsg_data(nlh); |
a58917f5 | 186 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 187 | |
a4458343 | 188 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
189 | r->idiag_state = sk->sk_state; |
190 | r->idiag_timer = 0; | |
191 | r->idiag_retrans = 0; | |
1da177e4 | 192 | |
d545caca | 193 | if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin)) |
e4e541a8 PE |
194 | goto errout; |
195 | ||
6e277ed5 TG |
196 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
197 | struct inet_diag_meminfo minfo = { | |
198 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
199 | .idiag_wmem = sk->sk_wmem_queued, | |
200 | .idiag_fmem = sk->sk_forward_alloc, | |
201 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
202 | }; | |
203 | ||
204 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
205 | goto errout; | |
3c4d05c8 PE |
206 | } |
207 | ||
c0636faa PE |
208 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
209 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 210 | goto errout; |
c0636faa | 211 | |
432490f9 CG |
212 | /* |
213 | * RAW sockets might have user-defined protocols assigned, | |
214 | * so report the one supplied on socket creation. | |
215 | */ | |
216 | if (sk->sk_type == SOCK_RAW) { | |
217 | if (nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol)) | |
218 | goto errout; | |
219 | } | |
220 | ||
e31c5e0e | 221 | if (!icsk) { |
62ad6fcd | 222 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
223 | goto out; |
224 | } | |
225 | ||
6ba8a3b1 | 226 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
57dde7f7 | 227 | icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT || |
6ba8a3b1 | 228 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { |
73c1f4a0 ACM |
229 | r->idiag_timer = 1; |
230 | r->idiag_retrans = icsk->icsk_retransmits; | |
b7de529c XL |
231 | r->idiag_expires = |
232 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
463c84b9 | 233 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
234 | r->idiag_timer = 4; |
235 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
236 | r->idiag_expires = |
237 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
1da177e4 | 238 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
239 | r->idiag_timer = 2; |
240 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
241 | r->idiag_expires = |
242 | jiffies_to_msecs(sk->sk_timer.expires - jiffies); | |
1da177e4 | 243 | } else { |
73c1f4a0 ACM |
244 | r->idiag_timer = 0; |
245 | r->idiag_expires = 0; | |
1da177e4 | 246 | } |
540722ff | 247 | |
3fd22af8 | 248 | if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { |
6ed46d12 ND |
249 | attr = nla_reserve_64bit(skb, INET_DIAG_INFO, |
250 | handler->idiag_info_size, | |
251 | INET_DIAG_PAD); | |
6e277ed5 TG |
252 | if (!attr) |
253 | goto errout; | |
3c4d05c8 | 254 | |
6e277ed5 | 255 | info = nla_data(attr); |
1da177e4 LT |
256 | } |
257 | ||
521f1cf1 ED |
258 | if (ext & (1 << (INET_DIAG_CONG - 1))) { |
259 | int err = 0; | |
260 | ||
261 | rcu_read_lock(); | |
262 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
263 | if (ca_ops) | |
264 | err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); | |
265 | rcu_read_unlock(); | |
266 | if (err < 0) | |
6e277ed5 | 267 | goto errout; |
521f1cf1 | 268 | } |
6e277ed5 | 269 | |
4f5736c4 | 270 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 271 | |
b37e8840 ID |
272 | if (ext & (1 << (INET_DIAG_INFO - 1)) && handler->idiag_get_aux) |
273 | if (handler->idiag_get_aux(sk, net_admin, skb) < 0) | |
274 | goto errout; | |
275 | ||
521f1cf1 | 276 | if (sk->sk_state < TCP_TIME_WAIT) { |
64f40ff5 ED |
277 | union tcp_cc_info info; |
278 | size_t sz = 0; | |
279 | int attr; | |
521f1cf1 ED |
280 | |
281 | rcu_read_lock(); | |
282 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
283 | if (ca_ops && ca_ops->get_info) | |
64f40ff5 | 284 | sz = ca_ops->get_info(sk, ext, &attr, &info); |
521f1cf1 | 285 | rcu_read_unlock(); |
64f40ff5 | 286 | if (sz && nla_put(skb, attr, sz, &info) < 0) |
521f1cf1 ED |
287 | goto errout; |
288 | } | |
1da177e4 | 289 | |
0888e372 LASL |
290 | if (ext & (1 << (INET_DIAG_CLASS_ID - 1))) { |
291 | u32 classid = 0; | |
292 | ||
293 | #ifdef CONFIG_SOCK_CGROUP_DATA | |
294 | classid = sock_cgroup_classid(&sk->sk_cgrp_data); | |
295 | #endif | |
296 | ||
297 | if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid)) | |
298 | goto errout; | |
299 | } | |
300 | ||
3c4d05c8 | 301 | out: |
053c095a JB |
302 | nlmsg_end(skb, nlh); |
303 | return 0; | |
1da177e4 | 304 | |
6e277ed5 TG |
305 | errout: |
306 | nlmsg_cancel(skb, nlh); | |
26932566 | 307 | return -EMSGSIZE; |
1da177e4 | 308 | } |
3c4d05c8 PE |
309 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
310 | ||
311 | static int inet_csk_diag_fill(struct sock *sk, | |
e31c5e0e | 312 | struct sk_buff *skb, |
34160ea3 | 313 | const struct inet_diag_req_v2 *req, |
d06ca956 | 314 | struct user_namespace *user_ns, |
15e47304 | 315 | u32 portid, u32 seq, u16 nlmsg_flags, |
d545caca LC |
316 | const struct nlmsghdr *unlh, |
317 | bool net_admin) | |
3c4d05c8 | 318 | { |
d545caca LC |
319 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, user_ns, |
320 | portid, seq, nlmsg_flags, unlh, net_admin); | |
3c4d05c8 | 321 | } |
1da177e4 | 322 | |
33cf7c90 | 323 | static int inet_twsk_diag_fill(struct sock *sk, |
e31c5e0e | 324 | struct sk_buff *skb, |
15e47304 | 325 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
326 | const struct nlmsghdr *unlh) |
327 | { | |
33cf7c90 | 328 | struct inet_timewait_sock *tw = inet_twsk(sk); |
c7d58aab | 329 | struct inet_diag_msg *r; |
6e277ed5 | 330 | struct nlmsghdr *nlh; |
789f558c | 331 | long tmo; |
d106352d | 332 | |
15e47304 | 333 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
334 | nlmsg_flags); |
335 | if (!nlh) | |
d106352d | 336 | return -EMSGSIZE; |
c7d58aab | 337 | |
d106352d | 338 | r = nlmsg_data(nlh); |
c7d58aab ACM |
339 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
340 | ||
789f558c | 341 | tmo = tw->tw_timer.expires - jiffies; |
c7d58aab ACM |
342 | if (tmo < 0) |
343 | tmo = 0; | |
344 | ||
a4458343 | 345 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 346 | r->idiag_retrans = 0; |
b1aac815 | 347 | |
c7d58aab ACM |
348 | r->idiag_state = tw->tw_substate; |
349 | r->idiag_timer = 3; | |
96f817fe | 350 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
351 | r->idiag_rqueue = 0; |
352 | r->idiag_wqueue = 0; | |
353 | r->idiag_uid = 0; | |
354 | r->idiag_inode = 0; | |
6e277ed5 | 355 | |
053c095a JB |
356 | nlmsg_end(skb, nlh); |
357 | return 0; | |
c7d58aab ACM |
358 | } |
359 | ||
a58917f5 ED |
360 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
361 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca | 362 | const struct nlmsghdr *unlh, bool net_admin) |
a58917f5 | 363 | { |
d545caca | 364 | struct request_sock *reqsk = inet_reqsk(sk); |
a58917f5 ED |
365 | struct inet_diag_msg *r; |
366 | struct nlmsghdr *nlh; | |
367 | long tmo; | |
368 | ||
369 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
370 | nlmsg_flags); | |
371 | if (!nlh) | |
372 | return -EMSGSIZE; | |
373 | ||
374 | r = nlmsg_data(nlh); | |
375 | inet_diag_msg_common_fill(r, sk); | |
376 | r->idiag_state = TCP_SYN_RECV; | |
377 | r->idiag_timer = 1; | |
d545caca | 378 | r->idiag_retrans = reqsk->num_retrans; |
a58917f5 ED |
379 | |
380 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
381 | offsetof(struct sock, sk_cookie)); | |
382 | ||
fa76ce73 | 383 | tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; |
a58917f5 ED |
384 | r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0; |
385 | r->idiag_rqueue = 0; | |
386 | r->idiag_wqueue = 0; | |
387 | r->idiag_uid = 0; | |
388 | r->idiag_inode = 0; | |
389 | ||
d545caca LC |
390 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, |
391 | inet_rsk(reqsk)->ir_mark)) | |
392 | return -EMSGSIZE; | |
393 | ||
a58917f5 ED |
394 | nlmsg_end(skb, nlh); |
395 | return 0; | |
396 | } | |
397 | ||
dff2c035 | 398 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 399 | const struct inet_diag_req_v2 *r, |
d06ca956 | 400 | struct user_namespace *user_ns, |
15e47304 | 401 | u32 portid, u32 seq, u16 nlmsg_flags, |
d545caca | 402 | const struct nlmsghdr *unlh, bool net_admin) |
dff2c035 ACM |
403 | { |
404 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 405 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
406 | nlmsg_flags, unlh); |
407 | ||
a58917f5 ED |
408 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
409 | return inet_req_diag_fill(sk, skb, portid, seq, | |
d545caca | 410 | nlmsg_flags, unlh, net_admin); |
a58917f5 | 411 | |
efe4208f | 412 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
d545caca | 413 | nlmsg_flags, unlh, net_admin); |
dff2c035 ACM |
414 | } |
415 | ||
b613f56e LC |
416 | struct sock *inet_diag_find_one_icsk(struct net *net, |
417 | struct inet_hashinfo *hashinfo, | |
418 | const struct inet_diag_req_v2 *req) | |
1da177e4 | 419 | { |
e31c5e0e | 420 | struct sock *sk; |
d523a328 | 421 | |
2d331915 | 422 | rcu_read_lock(); |
e31c5e0e | 423 | if (req->sdiag_family == AF_INET) |
a583636a | 424 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0], |
73c1f4a0 ACM |
425 | req->id.idiag_dport, req->id.idiag_src[0], |
426 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 427 | #if IS_ENABLED(CONFIG_IPV6) |
7c130672 ED |
428 | else if (req->sdiag_family == AF_INET6) { |
429 | if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) && | |
430 | ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src)) | |
a583636a | 431 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3], |
7c130672 ED |
432 | req->id.idiag_dport, req->id.idiag_src[3], |
433 | req->id.idiag_sport, req->id.idiag_if); | |
434 | else | |
a583636a | 435 | sk = inet6_lookup(net, hashinfo, NULL, 0, |
7c130672 ED |
436 | (struct in6_addr *)req->id.idiag_dst, |
437 | req->id.idiag_dport, | |
438 | (struct in6_addr *)req->id.idiag_src, | |
439 | req->id.idiag_sport, | |
440 | req->id.idiag_if); | |
441 | } | |
1da177e4 | 442 | #endif |
2d331915 ED |
443 | else { |
444 | rcu_read_unlock(); | |
b613f56e | 445 | return ERR_PTR(-EINVAL); |
2d331915 ED |
446 | } |
447 | rcu_read_unlock(); | |
e31c5e0e | 448 | if (!sk) |
b613f56e | 449 | return ERR_PTR(-ENOENT); |
1da177e4 | 450 | |
b613f56e LC |
451 | if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) { |
452 | sock_gen_put(sk); | |
453 | return ERR_PTR(-ENOENT); | |
454 | } | |
455 | ||
456 | return sk; | |
457 | } | |
458 | EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk); | |
459 | ||
460 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, | |
461 | struct sk_buff *in_skb, | |
462 | const struct nlmsghdr *nlh, | |
463 | const struct inet_diag_req_v2 *req) | |
464 | { | |
b37e8840 | 465 | bool net_admin = netlink_net_capable(in_skb, CAP_NET_ADMIN); |
b613f56e LC |
466 | struct net *net = sock_net(in_skb->sk); |
467 | struct sk_buff *rep; | |
468 | struct sock *sk; | |
469 | int err; | |
470 | ||
471 | sk = inet_diag_find_one_icsk(net, hashinfo, req); | |
472 | if (IS_ERR(sk)) | |
473 | return PTR_ERR(sk); | |
1da177e4 | 474 | |
b37e8840 | 475 | rep = nlmsg_new(inet_sk_attr_size(sk, req, net_admin), GFP_KERNEL); |
6e277ed5 TG |
476 | if (!rep) { |
477 | err = -ENOMEM; | |
1da177e4 | 478 | goto out; |
6e277ed5 | 479 | } |
1da177e4 | 480 | |
a029fe26 | 481 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 482 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 483 | NETLINK_CB(in_skb).portid, |
b37e8840 | 484 | nlh->nlmsg_seq, 0, nlh, net_admin); |
26932566 PM |
485 | if (err < 0) { |
486 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 487 | nlmsg_free(rep); |
26932566 PM |
488 | goto out; |
489 | } | |
15e47304 | 490 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 491 | MSG_DONTWAIT); |
1da177e4 LT |
492 | if (err > 0) |
493 | err = 0; | |
494 | ||
495 | out: | |
c1d607cc ED |
496 | if (sk) |
497 | sock_gen_put(sk); | |
498 | ||
476f7dbf PE |
499 | return err; |
500 | } | |
1942c518 | 501 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf | 502 | |
6eb5d2e0 | 503 | static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb, |
476f7dbf | 504 | const struct nlmsghdr *nlh, |
34160ea3 | 505 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
506 | { |
507 | const struct inet_diag_handler *handler; | |
508 | int err; | |
509 | ||
510 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
511 | if (IS_ERR(handler)) | |
512 | err = PTR_ERR(handler); | |
6eb5d2e0 | 513 | else if (cmd == SOCK_DIAG_BY_FAMILY) |
1942c518 | 514 | err = handler->dump_one(in_skb, nlh, req); |
6eb5d2e0 LC |
515 | else if (cmd == SOCK_DESTROY && handler->destroy) |
516 | err = handler->destroy(in_skb, req); | |
517 | else | |
518 | err = -EOPNOTSUPP; | |
d523a328 | 519 | inet_diag_unlock_handler(handler); |
476f7dbf | 520 | |
1da177e4 LT |
521 | return err; |
522 | } | |
523 | ||
9f855299 | 524 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
525 | { |
526 | int words = bits >> 5; | |
527 | ||
528 | bits &= 0x1f; | |
529 | ||
530 | if (words) { | |
531 | if (memcmp(a1, a2, words << 2)) | |
532 | return 0; | |
533 | } | |
534 | if (bits) { | |
9f855299 AV |
535 | __be32 w1, w2; |
536 | __be32 mask; | |
1da177e4 LT |
537 | |
538 | w1 = a1[words]; | |
539 | w2 = a2[words]; | |
540 | ||
541 | mask = htonl((0xffffffff) << (32 - bits)); | |
542 | ||
543 | if ((w1 ^ w2) & mask) | |
544 | return 0; | |
545 | } | |
546 | ||
547 | return 1; | |
548 | } | |
549 | ||
87c22ea5 | 550 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 551 | const struct inet_diag_entry *entry) |
1da177e4 | 552 | { |
87c22ea5 PE |
553 | const void *bc = nla_data(_bc); |
554 | int len = nla_len(_bc); | |
555 | ||
1da177e4 LT |
556 | while (len > 0) { |
557 | int yes = 1; | |
73c1f4a0 | 558 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
559 | |
560 | switch (op->code) { | |
73c1f4a0 | 561 | case INET_DIAG_BC_NOP: |
1da177e4 | 562 | break; |
73c1f4a0 | 563 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
564 | yes = 0; |
565 | break; | |
bbb6189d KE |
566 | case INET_DIAG_BC_S_EQ: |
567 | yes = entry->sport == op[1].no; | |
568 | break; | |
73c1f4a0 | 569 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
570 | yes = entry->sport >= op[1].no; |
571 | break; | |
73c1f4a0 | 572 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 573 | yes = entry->sport <= op[1].no; |
1da177e4 | 574 | break; |
bbb6189d KE |
575 | case INET_DIAG_BC_D_EQ: |
576 | yes = entry->dport == op[1].no; | |
577 | break; | |
73c1f4a0 | 578 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
579 | yes = entry->dport >= op[1].no; |
580 | break; | |
73c1f4a0 | 581 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
582 | yes = entry->dport <= op[1].no; |
583 | break; | |
73c1f4a0 | 584 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
585 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
586 | break; | |
73c1f4a0 | 587 | case INET_DIAG_BC_S_COND: |
a8c2190e | 588 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
589 | const struct inet_diag_hostcond *cond; |
590 | const __be32 *addr; | |
1da177e4 | 591 | |
e31c5e0e | 592 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 593 | if (cond->port != -1 && |
73c1f4a0 | 594 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
595 | entry->sport : entry->dport)) { |
596 | yes = 0; | |
597 | break; | |
598 | } | |
4e852c02 | 599 | |
73c1f4a0 | 600 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
601 | addr = entry->saddr; |
602 | else | |
603 | addr = entry->daddr; | |
604 | ||
f67caec9 NC |
605 | if (cond->family != AF_UNSPEC && |
606 | cond->family != entry->family) { | |
607 | if (entry->family == AF_INET6 && | |
608 | cond->family == AF_INET) { | |
609 | if (addr[0] == 0 && addr[1] == 0 && | |
610 | addr[2] == htonl(0xffff) && | |
611 | bitstring_match(addr + 3, | |
612 | cond->addr, | |
613 | cond->prefix_len)) | |
614 | break; | |
615 | } | |
616 | yes = 0; | |
617 | break; | |
618 | } | |
619 | ||
620 | if (cond->prefix_len == 0) | |
621 | break; | |
4e852c02 ACM |
622 | if (bitstring_match(addr, cond->addr, |
623 | cond->prefix_len)) | |
1da177e4 | 624 | break; |
1da177e4 LT |
625 | yes = 0; |
626 | break; | |
627 | } | |
637c841d DA |
628 | case INET_DIAG_BC_DEV_COND: { |
629 | u32 ifindex; | |
630 | ||
631 | ifindex = *((const u32 *)(op + 1)); | |
632 | if (ifindex != entry->ifindex) | |
633 | yes = 0; | |
634 | break; | |
635 | } | |
a52e95ab LC |
636 | case INET_DIAG_BC_MARK_COND: { |
637 | struct inet_diag_markcond *cond; | |
638 | ||
639 | cond = (struct inet_diag_markcond *)(op + 1); | |
640 | if ((entry->mark & cond->mask) != cond->mark) | |
641 | yes = 0; | |
642 | break; | |
643 | } | |
1da177e4 LT |
644 | } |
645 | ||
4e852c02 | 646 | if (yes) { |
1da177e4 LT |
647 | len -= op->yes; |
648 | bc += op->yes; | |
649 | } else { | |
650 | len -= op->no; | |
651 | bc += op->no; | |
652 | } | |
653 | } | |
a02cec21 | 654 | return len == 0; |
1da177e4 LT |
655 | } |
656 | ||
a4458343 ED |
657 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
658 | */ | |
659 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
660 | const struct sock *sk) | |
661 | { | |
662 | #if IS_ENABLED(CONFIG_IPV6) | |
663 | if (sk->sk_family == AF_INET6) { | |
664 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
665 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
666 | } else | |
667 | #endif | |
668 | { | |
669 | entry->saddr = &sk->sk_rcv_saddr; | |
670 | entry->daddr = &sk->sk_daddr; | |
671 | } | |
672 | } | |
673 | ||
8d07d151 PE |
674 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
675 | { | |
8d07d151 | 676 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 677 | struct inet_diag_entry entry; |
8d07d151 | 678 | |
e31c5e0e | 679 | if (!bc) |
8d07d151 PE |
680 | return 1; |
681 | ||
682 | entry.family = sk->sk_family; | |
a4458343 | 683 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
684 | entry.sport = inet->inet_num; |
685 | entry.dport = ntohs(inet->inet_dport); | |
637c841d | 686 | entry.ifindex = sk->sk_bound_dev_if; |
a58917f5 | 687 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
a52e95ab LC |
688 | if (sk_fullsock(sk)) |
689 | entry.mark = sk->sk_mark; | |
690 | else if (sk->sk_state == TCP_NEW_SYN_RECV) | |
691 | entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark; | |
692 | else | |
693 | entry.mark = 0; | |
8d07d151 PE |
694 | |
695 | return inet_diag_bc_run(bc, &entry); | |
696 | } | |
697 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
698 | ||
1da177e4 LT |
699 | static int valid_cc(const void *bc, int len, int cc) |
700 | { | |
701 | while (len >= 0) { | |
73c1f4a0 | 702 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
703 | |
704 | if (cc > len) | |
705 | return 0; | |
706 | if (cc == len) | |
707 | return 1; | |
eeb14972 | 708 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
709 | return 0; |
710 | len -= op->yes; | |
711 | bc += op->yes; | |
712 | } | |
713 | return 0; | |
714 | } | |
715 | ||
637c841d DA |
716 | /* data is u32 ifindex */ |
717 | static bool valid_devcond(const struct inet_diag_bc_op *op, int len, | |
718 | int *min_len) | |
719 | { | |
720 | /* Check ifindex space. */ | |
721 | *min_len += sizeof(u32); | |
722 | if (len < *min_len) | |
723 | return false; | |
724 | ||
725 | return true; | |
726 | } | |
405c0059 NC |
727 | /* Validate an inet_diag_hostcond. */ |
728 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
729 | int *min_len) | |
730 | { | |
405c0059 | 731 | struct inet_diag_hostcond *cond; |
e31c5e0e | 732 | int addr_len; |
405c0059 NC |
733 | |
734 | /* Check hostcond space. */ | |
735 | *min_len += sizeof(struct inet_diag_hostcond); | |
736 | if (len < *min_len) | |
737 | return false; | |
738 | cond = (struct inet_diag_hostcond *)(op + 1); | |
739 | ||
740 | /* Check address family and address length. */ | |
741 | switch (cond->family) { | |
742 | case AF_UNSPEC: | |
743 | addr_len = 0; | |
744 | break; | |
745 | case AF_INET: | |
746 | addr_len = sizeof(struct in_addr); | |
747 | break; | |
748 | case AF_INET6: | |
749 | addr_len = sizeof(struct in6_addr); | |
750 | break; | |
751 | default: | |
752 | return false; | |
753 | } | |
754 | *min_len += addr_len; | |
755 | if (len < *min_len) | |
756 | return false; | |
757 | ||
758 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
759 | if (cond->prefix_len > 8 * addr_len) | |
760 | return false; | |
761 | ||
762 | return true; | |
763 | } | |
764 | ||
5e1f5420 | 765 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
766 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
767 | int len, int *min_len) | |
5e1f5420 NC |
768 | { |
769 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
770 | *min_len += sizeof(struct inet_diag_bc_op); | |
771 | if (len < *min_len) | |
772 | return false; | |
773 | return true; | |
774 | } | |
775 | ||
a52e95ab LC |
776 | static bool valid_markcond(const struct inet_diag_bc_op *op, int len, |
777 | int *min_len) | |
1da177e4 | 778 | { |
a52e95ab LC |
779 | *min_len += sizeof(struct inet_diag_markcond); |
780 | return len >= *min_len; | |
781 | } | |
782 | ||
783 | static int inet_diag_bc_audit(const struct nlattr *attr, | |
784 | const struct sk_buff *skb) | |
785 | { | |
786 | bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN); | |
627cc4ad LC |
787 | const void *bytecode, *bc; |
788 | int bytecode_len, len; | |
789 | ||
790 | if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op)) | |
791 | return -EINVAL; | |
792 | ||
793 | bytecode = bc = nla_data(attr); | |
794 | len = bytecode_len = nla_len(attr); | |
1da177e4 LT |
795 | |
796 | while (len > 0) { | |
405c0059 | 797 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 798 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 799 | |
1da177e4 | 800 | switch (op->code) { |
73c1f4a0 ACM |
801 | case INET_DIAG_BC_S_COND: |
802 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
803 | if (!valid_hostcond(bc, len, &min_len)) |
804 | return -EINVAL; | |
5e1f5420 | 805 | break; |
637c841d DA |
806 | case INET_DIAG_BC_DEV_COND: |
807 | if (!valid_devcond(bc, len, &min_len)) | |
808 | return -EINVAL; | |
809 | break; | |
bbb6189d | 810 | case INET_DIAG_BC_S_EQ: |
73c1f4a0 ACM |
811 | case INET_DIAG_BC_S_GE: |
812 | case INET_DIAG_BC_S_LE: | |
bbb6189d | 813 | case INET_DIAG_BC_D_EQ: |
73c1f4a0 ACM |
814 | case INET_DIAG_BC_D_GE: |
815 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 816 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
817 | return -EINVAL; |
818 | break; | |
a52e95ab LC |
819 | case INET_DIAG_BC_MARK_COND: |
820 | if (!net_admin) | |
821 | return -EPERM; | |
822 | if (!valid_markcond(bc, len, &min_len)) | |
823 | return -EINVAL; | |
824 | break; | |
5e1f5420 NC |
825 | case INET_DIAG_BC_AUTO: |
826 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 827 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
828 | break; |
829 | default: | |
830 | return -EINVAL; | |
831 | } | |
5e1f5420 NC |
832 | |
833 | if (op->code != INET_DIAG_BC_NOP) { | |
834 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
835 | return -EINVAL; | |
836 | if (op->no < len && | |
837 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
838 | return -EINVAL; | |
839 | } | |
840 | ||
405c0059 | 841 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 842 | return -EINVAL; |
4e852c02 | 843 | bc += op->yes; |
1da177e4 LT |
844 | len -= op->yes; |
845 | } | |
846 | return len == 0 ? 0 : -EINVAL; | |
847 | } | |
848 | ||
dff2c035 ACM |
849 | static int inet_csk_diag_dump(struct sock *sk, |
850 | struct sk_buff *skb, | |
37f352b5 | 851 | struct netlink_callback *cb, |
34160ea3 | 852 | const struct inet_diag_req_v2 *r, |
d545caca LC |
853 | const struct nlattr *bc, |
854 | bool net_admin) | |
1da177e4 | 855 | { |
8d07d151 PE |
856 | if (!inet_diag_bc_sk(bc, sk)) |
857 | return 0; | |
1da177e4 | 858 | |
a029fe26 | 859 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 860 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 861 | NETLINK_CB(cb->skb).portid, |
d545caca LC |
862 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh, |
863 | net_admin); | |
1da177e4 LT |
864 | } |
865 | ||
49612729 ED |
866 | static void twsk_build_assert(void) |
867 | { | |
868 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
869 | offsetof(struct sock, sk_family)); | |
870 | ||
871 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
872 | offsetof(struct inet_sock, inet_num)); | |
873 | ||
874 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
875 | offsetof(struct inet_sock, inet_dport)); | |
876 | ||
877 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
878 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
879 | ||
880 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
881 | offsetof(struct inet_sock, inet_daddr)); | |
882 | ||
883 | #if IS_ENABLED(CONFIG_IPV6) | |
884 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
885 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
886 | ||
887 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
888 | offsetof(struct sock, sk_v6_daddr)); | |
889 | #endif | |
890 | } | |
891 | ||
1942c518 | 892 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
e31c5e0e | 893 | struct netlink_callback *cb, |
34160ea3 | 894 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 | 895 | { |
67db3e4b | 896 | bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN); |
51d7cccf | 897 | struct net *net = sock_net(skb->sk); |
079096f1 | 898 | u32 idiag_states = r->idiag_states; |
67db3e4b ED |
899 | int i, num, s_i, s_num; |
900 | struct sock *sk; | |
4e852c02 | 901 | |
079096f1 ED |
902 | if (idiag_states & TCPF_SYN_RECV) |
903 | idiag_states |= TCPF_NEW_SYN_RECV; | |
1da177e4 LT |
904 | s_i = cb->args[1]; |
905 | s_num = num = cb->args[2]; | |
4f5736c4 | 906 | |
1da177e4 | 907 | if (cb->args[0] == 0) { |
9652dc2e | 908 | if (!(idiag_states & TCPF_LISTEN) || r->id.idiag_dport) |
1da177e4 | 909 | goto skip_listen_ht; |
540722ff | 910 | |
0f7ff927 | 911 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 912 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
913 | |
914 | num = 0; | |
5caea4ea | 915 | ilb = &hashinfo->listening_hash[i]; |
9652dc2e | 916 | spin_lock(&ilb->lock); |
3b24d854 | 917 | sk_for_each(sk, &ilb->head) { |
1da177e4 LT |
918 | struct inet_sock *inet = inet_sk(sk); |
919 | ||
51d7cccf AV |
920 | if (!net_eq(sock_net(sk), net)) |
921 | continue; | |
922 | ||
1da177e4 LT |
923 | if (num < s_num) { |
924 | num++; | |
925 | continue; | |
926 | } | |
927 | ||
d23deaa0 | 928 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 929 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
930 | goto next_listen; |
931 | ||
c720c7e8 | 932 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 933 | r->id.idiag_sport) |
1da177e4 LT |
934 | goto next_listen; |
935 | ||
d545caca LC |
936 | if (inet_csk_diag_dump(sk, skb, cb, r, |
937 | bc, net_admin) < 0) { | |
9652dc2e | 938 | spin_unlock(&ilb->lock); |
1da177e4 LT |
939 | goto done; |
940 | } | |
941 | ||
942 | next_listen: | |
1da177e4 LT |
943 | ++num; |
944 | } | |
9652dc2e | 945 | spin_unlock(&ilb->lock); |
1da177e4 LT |
946 | |
947 | s_num = 0; | |
1da177e4 | 948 | } |
1da177e4 LT |
949 | skip_listen_ht: |
950 | cb->args[0] = 1; | |
951 | s_i = num = s_num = 0; | |
952 | } | |
953 | ||
079096f1 | 954 | if (!(idiag_states & ~TCPF_LISTEN)) |
efb3cb42 | 955 | goto out; |
1da177e4 | 956 | |
67db3e4b | 957 | #define SKARR_SZ 16 |
f373b53b | 958 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 959 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 960 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 961 | struct hlist_nulls_node *node; |
67db3e4b ED |
962 | struct sock *sk_arr[SKARR_SZ]; |
963 | int num_arr[SKARR_SZ]; | |
964 | int idx, accum, res; | |
6be547a6 | 965 | |
05dbc7b5 | 966 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
967 | continue; |
968 | ||
1da177e4 LT |
969 | if (i > s_i) |
970 | s_num = 0; | |
971 | ||
67db3e4b ED |
972 | next_chunk: |
973 | num = 0; | |
974 | accum = 0; | |
7e3aab4a | 975 | spin_lock_bh(lock); |
3ab5aee7 | 976 | sk_nulls_for_each(sk, node, &head->chain) { |
67db3e4b | 977 | int state; |
1da177e4 | 978 | |
51d7cccf AV |
979 | if (!net_eq(sock_net(sk), net)) |
980 | continue; | |
1da177e4 LT |
981 | if (num < s_num) |
982 | goto next_normal; | |
70315d22 NC |
983 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
984 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
079096f1 | 985 | if (!(idiag_states & (1 << state))) |
1da177e4 | 986 | goto next_normal; |
d23deaa0 | 987 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 988 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 989 | goto next_normal; |
05dbc7b5 | 990 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 991 | r->id.idiag_sport) |
1da177e4 | 992 | goto next_normal; |
05dbc7b5 | 993 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 994 | r->id.idiag_dport) |
1da177e4 | 995 | goto next_normal; |
a58917f5 ED |
996 | twsk_build_assert(); |
997 | ||
998 | if (!inet_diag_bc_sk(bc, sk)) | |
999 | goto next_normal; | |
1000 | ||
67db3e4b ED |
1001 | sock_hold(sk); |
1002 | num_arr[accum] = num; | |
1003 | sk_arr[accum] = sk; | |
1004 | if (++accum == SKARR_SZ) | |
1005 | break; | |
1006 | next_normal: | |
1007 | ++num; | |
1008 | } | |
1009 | spin_unlock_bh(lock); | |
1010 | res = 0; | |
1011 | for (idx = 0; idx < accum; idx++) { | |
1012 | if (res >= 0) { | |
1013 | res = sk_diag_fill(sk_arr[idx], skb, r, | |
a58917f5 ED |
1014 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
1015 | NETLINK_CB(cb->skb).portid, | |
1016 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
d545caca | 1017 | cb->nlh, net_admin); |
67db3e4b ED |
1018 | if (res < 0) |
1019 | num = num_arr[idx]; | |
1da177e4 | 1020 | } |
67db3e4b | 1021 | sock_gen_put(sk_arr[idx]); |
1da177e4 | 1022 | } |
67db3e4b ED |
1023 | if (res < 0) |
1024 | break; | |
acffb584 | 1025 | cond_resched(); |
67db3e4b ED |
1026 | if (accum == SKARR_SZ) { |
1027 | s_num = num + 1; | |
1028 | goto next_chunk; | |
1029 | } | |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | done: | |
1033 | cb->args[1] = i; | |
1034 | cb->args[2] = num; | |
efb3cb42 PE |
1035 | out: |
1036 | ; | |
1037 | } | |
1942c518 | 1038 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
1039 | |
1040 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
34160ea3 | 1041 | const struct inet_diag_req_v2 *r, |
e31c5e0e | 1042 | struct nlattr *bc) |
efb3cb42 PE |
1043 | { |
1044 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 1045 | int err = 0; |
efb3cb42 PE |
1046 | |
1047 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
1048 | if (!IS_ERR(handler)) | |
1942c518 | 1049 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
1050 | else |
1051 | err = PTR_ERR(handler); | |
d523a328 | 1052 | inet_diag_unlock_handler(handler); |
efb3cb42 | 1053 | |
cacb6ba0 | 1054 | return err ? : skb->len; |
1da177e4 LT |
1055 | } |
1056 | ||
25c4cd2b PE |
1057 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1058 | { | |
c8991362 | 1059 | int hdrlen = sizeof(struct inet_diag_req_v2); |
e31c5e0e | 1060 | struct nlattr *bc = NULL; |
25c4cd2b PE |
1061 | |
1062 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1063 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1064 | ||
d106352d | 1065 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
1066 | } |
1067 | ||
e31c5e0e | 1068 | static int inet_diag_type2proto(int type) |
a029fe26 PE |
1069 | { |
1070 | switch (type) { | |
1071 | case TCPDIAG_GETSOCK: | |
1072 | return IPPROTO_TCP; | |
1073 | case DCCPDIAG_GETSOCK: | |
1074 | return IPPROTO_DCCP; | |
1075 | default: | |
1076 | return 0; | |
1077 | } | |
1078 | } | |
1079 | ||
e31c5e0e ED |
1080 | static int inet_diag_dump_compat(struct sk_buff *skb, |
1081 | struct netlink_callback *cb) | |
25c4cd2b | 1082 | { |
d106352d | 1083 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
e31c5e0e | 1084 | int hdrlen = sizeof(struct inet_diag_req); |
c8991362 | 1085 | struct inet_diag_req_v2 req; |
25c4cd2b | 1086 | struct nlattr *bc = NULL; |
25c4cd2b | 1087 | |
d23deaa0 | 1088 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
1089 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
1090 | req.idiag_ext = rc->idiag_ext; | |
1091 | req.idiag_states = rc->idiag_states; | |
1092 | req.id = rc->id; | |
1093 | ||
1094 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1095 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1096 | ||
1097 | return __inet_diag_dump(skb, cb, &req, bc); | |
1098 | } | |
1099 | ||
fe50ce28 | 1100 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
e31c5e0e | 1101 | const struct nlmsghdr *nlh) |
fe50ce28 | 1102 | { |
d106352d | 1103 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 1104 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
1105 | |
1106 | req.sdiag_family = rc->idiag_family; | |
1107 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
1108 | req.idiag_ext = rc->idiag_ext; | |
1109 | req.idiag_states = rc->idiag_states; | |
1110 | req.id = rc->id; | |
1111 | ||
6eb5d2e0 | 1112 | return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req); |
fe50ce28 PE |
1113 | } |
1114 | ||
8d34172d | 1115 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1116 | { |
3b09c84c | 1117 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 1118 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1119 | |
ead592ba TG |
1120 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
1121 | nlmsg_len(nlh) < hdrlen) | |
1122 | return -EINVAL; | |
1da177e4 | 1123 | |
b8f3ab42 | 1124 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1125 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1126 | struct nlattr *attr; | |
627cc4ad | 1127 | int err; |
1da177e4 | 1128 | |
ead592ba TG |
1129 | attr = nlmsg_find_attr(nlh, hdrlen, |
1130 | INET_DIAG_REQ_BYTECODE); | |
a52e95ab | 1131 | err = inet_diag_bc_audit(attr, skb); |
627cc4ad LC |
1132 | if (err) |
1133 | return err; | |
ead592ba | 1134 | } |
80d326fa PNA |
1135 | { |
1136 | struct netlink_dump_control c = { | |
1137 | .dump = inet_diag_dump_compat, | |
1138 | }; | |
51d7cccf | 1139 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1140 | } |
1da177e4 | 1141 | } |
ead592ba | 1142 | |
fe50ce28 | 1143 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1144 | } |
1145 | ||
6eb5d2e0 | 1146 | static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h) |
d366477a | 1147 | { |
c8991362 | 1148 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1149 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1150 | |
1151 | if (nlmsg_len(h) < hdrlen) | |
1152 | return -EINVAL; | |
1153 | ||
6eb5d2e0 LC |
1154 | if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY && |
1155 | h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1156 | if (nlmsg_attrlen(h, hdrlen)) { |
1157 | struct nlattr *attr; | |
627cc4ad | 1158 | int err; |
e31c5e0e | 1159 | |
25c4cd2b PE |
1160 | attr = nlmsg_find_attr(h, hdrlen, |
1161 | INET_DIAG_REQ_BYTECODE); | |
a52e95ab | 1162 | err = inet_diag_bc_audit(attr, skb); |
627cc4ad LC |
1163 | if (err) |
1164 | return err; | |
25c4cd2b | 1165 | } |
80d326fa PNA |
1166 | { |
1167 | struct netlink_dump_control c = { | |
1168 | .dump = inet_diag_dump, | |
1169 | }; | |
51d7cccf | 1170 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1171 | } |
d366477a PE |
1172 | } |
1173 | ||
6eb5d2e0 | 1174 | return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h)); |
d366477a PE |
1175 | } |
1176 | ||
35ac838a CG |
1177 | static |
1178 | int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk) | |
1179 | { | |
1180 | const struct inet_diag_handler *handler; | |
1181 | struct nlmsghdr *nlh; | |
1182 | struct nlattr *attr; | |
1183 | struct inet_diag_msg *r; | |
1184 | void *info = NULL; | |
1185 | int err = 0; | |
1186 | ||
1187 | nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0); | |
1188 | if (!nlh) | |
1189 | return -ENOMEM; | |
1190 | ||
1191 | r = nlmsg_data(nlh); | |
1192 | memset(r, 0, sizeof(*r)); | |
1193 | inet_diag_msg_common_fill(r, sk); | |
e0df02e0 CG |
1194 | if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM) |
1195 | r->id.idiag_sport = inet_sk(sk)->inet_sport; | |
35ac838a CG |
1196 | r->idiag_state = sk->sk_state; |
1197 | ||
1198 | if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) { | |
1199 | nlmsg_cancel(skb, nlh); | |
1200 | return err; | |
1201 | } | |
1202 | ||
1203 | handler = inet_diag_lock_handler(sk->sk_protocol); | |
1204 | if (IS_ERR(handler)) { | |
1205 | inet_diag_unlock_handler(handler); | |
1206 | nlmsg_cancel(skb, nlh); | |
1207 | return PTR_ERR(handler); | |
1208 | } | |
1209 | ||
1210 | attr = handler->idiag_info_size | |
6ed46d12 ND |
1211 | ? nla_reserve_64bit(skb, INET_DIAG_INFO, |
1212 | handler->idiag_info_size, | |
1213 | INET_DIAG_PAD) | |
35ac838a CG |
1214 | : NULL; |
1215 | if (attr) | |
1216 | info = nla_data(attr); | |
1217 | ||
1218 | handler->idiag_get_info(sk, r, info); | |
1219 | inet_diag_unlock_handler(handler); | |
1220 | ||
1221 | nlmsg_end(skb, nlh); | |
1222 | return 0; | |
1223 | } | |
1224 | ||
8dcf01fc | 1225 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a | 1226 | .family = AF_INET, |
6eb5d2e0 | 1227 | .dump = inet_diag_handler_cmd, |
35ac838a | 1228 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1229 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1230 | }; |
1231 | ||
8dcf01fc | 1232 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a | 1233 | .family = AF_INET6, |
6eb5d2e0 | 1234 | .dump = inet_diag_handler_cmd, |
35ac838a | 1235 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1236 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1237 | }; |
1238 | ||
4f5736c4 ACM |
1239 | int inet_diag_register(const struct inet_diag_handler *h) |
1240 | { | |
1241 | const __u16 type = h->idiag_type; | |
1242 | int err = -EINVAL; | |
1243 | ||
f13c95f0 | 1244 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1245 | goto out; |
1246 | ||
d523a328 | 1247 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1248 | err = -EEXIST; |
e31c5e0e | 1249 | if (!inet_diag_table[type]) { |
4f5736c4 ACM |
1250 | inet_diag_table[type] = h; |
1251 | err = 0; | |
1252 | } | |
d523a328 | 1253 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1254 | out: |
1255 | return err; | |
1256 | } | |
1257 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1258 | ||
1259 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1260 | { | |
1261 | const __u16 type = h->idiag_type; | |
1262 | ||
f13c95f0 | 1263 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1264 | return; |
1265 | ||
d523a328 | 1266 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1267 | inet_diag_table[type] = NULL; |
d523a328 | 1268 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1269 | } |
1270 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1271 | ||
73c1f4a0 | 1272 | static int __init inet_diag_init(void) |
1da177e4 | 1273 | { |
f13c95f0 | 1274 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1275 | sizeof(struct inet_diag_handler *)); |
1276 | int err = -ENOMEM; | |
1277 | ||
0da974f4 | 1278 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1279 | if (!inet_diag_table) |
1280 | goto out; | |
1281 | ||
d366477a PE |
1282 | err = sock_diag_register(&inet_diag_handler); |
1283 | if (err) | |
1284 | goto out_free_nl; | |
1285 | ||
1286 | err = sock_diag_register(&inet6_diag_handler); | |
1287 | if (err) | |
1288 | goto out_free_inet; | |
1289 | ||
8ef874bf | 1290 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1291 | out: |
1292 | return err; | |
d366477a PE |
1293 | |
1294 | out_free_inet: | |
1295 | sock_diag_unregister(&inet_diag_handler); | |
1296 | out_free_nl: | |
4f5736c4 ACM |
1297 | kfree(inet_diag_table); |
1298 | goto out; | |
1da177e4 LT |
1299 | } |
1300 | ||
73c1f4a0 | 1301 | static void __exit inet_diag_exit(void) |
1da177e4 | 1302 | { |
d366477a PE |
1303 | sock_diag_unregister(&inet6_diag_handler); |
1304 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1305 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1306 | kfree(inet_diag_table); |
1da177e4 LT |
1307 | } |
1308 | ||
73c1f4a0 ACM |
1309 | module_init(inet_diag_init); |
1310 | module_exit(inet_diag_exit); | |
1da177e4 | 1311 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1312 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1313 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |