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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
73c1f4a0 | 3 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 4 | * |
1da177e4 | 5 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
1da177e4 LT |
6 | */ |
7 | ||
172589cc | 8 | #include <linux/kernel.h> |
1da177e4 LT |
9 | #include <linux/module.h> |
10 | #include <linux/types.h> | |
11 | #include <linux/fcntl.h> | |
12 | #include <linux/random.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
1da177e4 LT |
14 | #include <linux/cache.h> |
15 | #include <linux/init.h> | |
16 | #include <linux/time.h> | |
17 | ||
18 | #include <net/icmp.h> | |
19 | #include <net/tcp.h> | |
20 | #include <net/ipv6.h> | |
21 | #include <net/inet_common.h> | |
505cbfc5 ACM |
22 | #include <net/inet_connection_sock.h> |
23 | #include <net/inet_hashtables.h> | |
24 | #include <net/inet_timewait_sock.h> | |
25 | #include <net/inet6_hashtables.h> | |
dc5fc579 | 26 | #include <net/netlink.h> |
1da177e4 LT |
27 | |
28 | #include <linux/inet.h> | |
29 | #include <linux/stddef.h> | |
30 | ||
a8c2190e | 31 | #include <linux/inet_diag.h> |
d366477a | 32 | #include <linux/sock_diag.h> |
1da177e4 | 33 | |
4f5736c4 ACM |
34 | static const struct inet_diag_handler **inet_diag_table; |
35 | ||
73c1f4a0 | 36 | struct inet_diag_entry { |
e31c5e0e ED |
37 | const __be32 *saddr; |
38 | const __be32 *daddr; | |
1da177e4 LT |
39 | u16 sport; |
40 | u16 dport; | |
41 | u16 family; | |
42 | u16 userlocks; | |
637c841d | 43 | u32 ifindex; |
a52e95ab | 44 | u32 mark; |
1da177e4 LT |
45 | }; |
46 | ||
d523a328 HX |
47 | static DEFINE_MUTEX(inet_diag_table_mutex); |
48 | ||
f13c95f0 | 49 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 50 | { |
f13c95f0 | 51 | if (!inet_diag_table[proto]) |
bf2ae2e4 | 52 | sock_load_diag_module(AF_INET, proto); |
d523a328 HX |
53 | |
54 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 55 | if (!inet_diag_table[proto]) |
d523a328 HX |
56 | return ERR_PTR(-ENOENT); |
57 | ||
f13c95f0 | 58 | return inet_diag_table[proto]; |
d523a328 HX |
59 | } |
60 | ||
e31c5e0e | 61 | static void inet_diag_unlock_handler(const struct inet_diag_handler *handler) |
d523a328 HX |
62 | { |
63 | mutex_unlock(&inet_diag_table_mutex); | |
64 | } | |
65 | ||
cb2050a7 | 66 | void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) |
a4458343 ED |
67 | { |
68 | r->idiag_family = sk->sk_family; | |
69 | ||
70 | r->id.idiag_sport = htons(sk->sk_num); | |
71 | r->id.idiag_dport = sk->sk_dport; | |
72 | r->id.idiag_if = sk->sk_bound_dev_if; | |
73 | sock_diag_save_cookie(sk, r->id.idiag_cookie); | |
74 | ||
75 | #if IS_ENABLED(CONFIG_IPV6) | |
76 | if (sk->sk_family == AF_INET6) { | |
77 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; | |
78 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; | |
79 | } else | |
80 | #endif | |
81 | { | |
82 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
83 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
84 | ||
85 | r->id.idiag_src[0] = sk->sk_rcv_saddr; | |
86 | r->id.idiag_dst[0] = sk->sk_daddr; | |
87 | } | |
88 | } | |
cb2050a7 | 89 | EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill); |
a4458343 | 90 | |
b37e8840 ID |
91 | static size_t inet_sk_attr_size(struct sock *sk, |
92 | const struct inet_diag_req_v2 *req, | |
93 | bool net_admin) | |
c8e2c80d | 94 | { |
b37e8840 ID |
95 | const struct inet_diag_handler *handler; |
96 | size_t aux = 0; | |
97 | ||
98 | handler = inet_diag_table[req->sdiag_protocol]; | |
99 | if (handler && handler->idiag_get_aux_size) | |
100 | aux = handler->idiag_get_aux_size(sk, net_admin); | |
101 | ||
c8e2c80d | 102 | return nla_total_size(sizeof(struct tcp_info)) |
c8e2c80d | 103 | + nla_total_size(sizeof(struct inet_diag_msg)) |
83f73c5b DY |
104 | + inet_diag_msg_attrs_size() |
105 | + nla_total_size(sizeof(struct inet_diag_meminfo)) | |
c8e2c80d ED |
106 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) |
107 | + nla_total_size(TCP_CA_NAME_MAX) | |
108 | + nla_total_size(sizeof(struct tcpvegas_info)) | |
b37e8840 | 109 | + aux |
c8e2c80d ED |
110 | + 64; |
111 | } | |
112 | ||
cb2050a7 XL |
113 | int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb, |
114 | struct inet_diag_msg *r, int ext, | |
d545caca LC |
115 | struct user_namespace *user_ns, |
116 | bool net_admin) | |
cb2050a7 XL |
117 | { |
118 | const struct inet_sock *inet = inet_sk(sk); | |
119 | ||
120 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) | |
121 | goto errout; | |
122 | ||
123 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, | |
124 | * hence this needs to be included regardless of socket family. | |
125 | */ | |
126 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
127 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) | |
128 | goto errout; | |
129 | ||
130 | #if IS_ENABLED(CONFIG_IPV6) | |
131 | if (r->idiag_family == AF_INET6) { | |
132 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) | |
133 | if (nla_put_u8(skb, INET_DIAG_TCLASS, | |
134 | inet6_sk(sk)->tclass) < 0) | |
135 | goto errout; | |
136 | ||
137 | if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
138 | nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk))) | |
139 | goto errout; | |
140 | } | |
141 | #endif | |
142 | ||
d545caca LC |
143 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark)) |
144 | goto errout; | |
145 | ||
83f73c5b DY |
146 | if (ext & (1 << (INET_DIAG_CLASS_ID - 1)) || |
147 | ext & (1 << (INET_DIAG_TCLASS - 1))) { | |
148 | u32 classid = 0; | |
149 | ||
150 | #ifdef CONFIG_SOCK_CGROUP_DATA | |
151 | classid = sock_cgroup_classid(&sk->sk_cgrp_data); | |
152 | #endif | |
153 | /* Fallback to socket priority if class id isn't set. | |
154 | * Classful qdiscs use it as direct reference to class. | |
155 | * For cgroup2 classid is always zero. | |
156 | */ | |
157 | if (!classid) | |
158 | classid = sk->sk_priority; | |
159 | ||
160 | if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid)) | |
161 | goto errout; | |
162 | } | |
163 | ||
cb2050a7 XL |
164 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
165 | r->idiag_inode = sock_i_ino(sk); | |
166 | ||
167 | return 0; | |
168 | errout: | |
169 | return 1; | |
170 | } | |
171 | EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill); | |
172 | ||
3c4d05c8 | 173 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 174 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
175 | struct user_namespace *user_ns, |
176 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca LC |
177 | const struct nlmsghdr *unlh, |
178 | bool net_admin) | |
1da177e4 | 179 | { |
521f1cf1 | 180 | const struct tcp_congestion_ops *ca_ops; |
e31c5e0e ED |
181 | const struct inet_diag_handler *handler; |
182 | int ext = req->idiag_ext; | |
73c1f4a0 | 183 | struct inet_diag_msg *r; |
1da177e4 | 184 | struct nlmsghdr *nlh; |
6e277ed5 | 185 | struct nlattr *attr; |
4f5736c4 | 186 | void *info = NULL; |
4f5736c4 | 187 | |
a029fe26 | 188 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 189 | BUG_ON(!handler); |
1da177e4 | 190 | |
15e47304 | 191 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
192 | nlmsg_flags); |
193 | if (!nlh) | |
d106352d | 194 | return -EMSGSIZE; |
4f5736c4 | 195 | |
d106352d | 196 | r = nlmsg_data(nlh); |
a58917f5 | 197 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 198 | |
a4458343 | 199 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
200 | r->idiag_state = sk->sk_state; |
201 | r->idiag_timer = 0; | |
202 | r->idiag_retrans = 0; | |
1da177e4 | 203 | |
d545caca | 204 | if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin)) |
e4e541a8 PE |
205 | goto errout; |
206 | ||
6e277ed5 TG |
207 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
208 | struct inet_diag_meminfo minfo = { | |
209 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
ab4e846a | 210 | .idiag_wmem = READ_ONCE(sk->sk_wmem_queued), |
6e277ed5 TG |
211 | .idiag_fmem = sk->sk_forward_alloc, |
212 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
213 | }; | |
214 | ||
215 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
216 | goto errout; | |
3c4d05c8 PE |
217 | } |
218 | ||
c0636faa PE |
219 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
220 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 221 | goto errout; |
c0636faa | 222 | |
432490f9 CG |
223 | /* |
224 | * RAW sockets might have user-defined protocols assigned, | |
225 | * so report the one supplied on socket creation. | |
226 | */ | |
227 | if (sk->sk_type == SOCK_RAW) { | |
228 | if (nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol)) | |
229 | goto errout; | |
230 | } | |
231 | ||
e31c5e0e | 232 | if (!icsk) { |
62ad6fcd | 233 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
234 | goto out; |
235 | } | |
236 | ||
6ba8a3b1 | 237 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
57dde7f7 | 238 | icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT || |
6ba8a3b1 | 239 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { |
73c1f4a0 ACM |
240 | r->idiag_timer = 1; |
241 | r->idiag_retrans = icsk->icsk_retransmits; | |
b7de529c | 242 | r->idiag_expires = |
3828a93f | 243 | jiffies_delta_to_msecs(icsk->icsk_timeout - jiffies); |
463c84b9 | 244 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
245 | r->idiag_timer = 4; |
246 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c | 247 | r->idiag_expires = |
3828a93f | 248 | jiffies_delta_to_msecs(icsk->icsk_timeout - jiffies); |
1da177e4 | 249 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
250 | r->idiag_timer = 2; |
251 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c | 252 | r->idiag_expires = |
3828a93f | 253 | jiffies_delta_to_msecs(sk->sk_timer.expires - jiffies); |
1da177e4 | 254 | } else { |
73c1f4a0 ACM |
255 | r->idiag_timer = 0; |
256 | r->idiag_expires = 0; | |
1da177e4 | 257 | } |
540722ff | 258 | |
3fd22af8 | 259 | if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { |
6ed46d12 ND |
260 | attr = nla_reserve_64bit(skb, INET_DIAG_INFO, |
261 | handler->idiag_info_size, | |
262 | INET_DIAG_PAD); | |
6e277ed5 TG |
263 | if (!attr) |
264 | goto errout; | |
3c4d05c8 | 265 | |
6e277ed5 | 266 | info = nla_data(attr); |
1da177e4 LT |
267 | } |
268 | ||
521f1cf1 ED |
269 | if (ext & (1 << (INET_DIAG_CONG - 1))) { |
270 | int err = 0; | |
271 | ||
272 | rcu_read_lock(); | |
273 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
274 | if (ca_ops) | |
275 | err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); | |
276 | rcu_read_unlock(); | |
277 | if (err < 0) | |
6e277ed5 | 278 | goto errout; |
521f1cf1 | 279 | } |
6e277ed5 | 280 | |
4f5736c4 | 281 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 282 | |
b37e8840 ID |
283 | if (ext & (1 << (INET_DIAG_INFO - 1)) && handler->idiag_get_aux) |
284 | if (handler->idiag_get_aux(sk, net_admin, skb) < 0) | |
285 | goto errout; | |
286 | ||
521f1cf1 | 287 | if (sk->sk_state < TCP_TIME_WAIT) { |
64f40ff5 ED |
288 | union tcp_cc_info info; |
289 | size_t sz = 0; | |
290 | int attr; | |
521f1cf1 ED |
291 | |
292 | rcu_read_lock(); | |
293 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
294 | if (ca_ops && ca_ops->get_info) | |
64f40ff5 | 295 | sz = ca_ops->get_info(sk, ext, &attr, &info); |
521f1cf1 | 296 | rcu_read_unlock(); |
64f40ff5 | 297 | if (sz && nla_put(skb, attr, sz, &info) < 0) |
521f1cf1 ED |
298 | goto errout; |
299 | } | |
1da177e4 | 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 | ||
a4458343 | 341 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 342 | r->idiag_retrans = 0; |
b1aac815 | 343 | |
c7d58aab ACM |
344 | r->idiag_state = tw->tw_substate; |
345 | r->idiag_timer = 3; | |
3828a93f ED |
346 | tmo = tw->tw_timer.expires - jiffies; |
347 | r->idiag_expires = jiffies_delta_to_msecs(tmo); | |
c7d58aab ACM |
348 | r->idiag_rqueue = 0; |
349 | r->idiag_wqueue = 0; | |
350 | r->idiag_uid = 0; | |
351 | r->idiag_inode = 0; | |
6e277ed5 | 352 | |
053c095a JB |
353 | nlmsg_end(skb, nlh); |
354 | return 0; | |
c7d58aab ACM |
355 | } |
356 | ||
a58917f5 ED |
357 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
358 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca | 359 | const struct nlmsghdr *unlh, bool net_admin) |
a58917f5 | 360 | { |
d545caca | 361 | struct request_sock *reqsk = inet_reqsk(sk); |
a58917f5 ED |
362 | struct inet_diag_msg *r; |
363 | struct nlmsghdr *nlh; | |
364 | long tmo; | |
365 | ||
366 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
367 | nlmsg_flags); | |
368 | if (!nlh) | |
369 | return -EMSGSIZE; | |
370 | ||
371 | r = nlmsg_data(nlh); | |
372 | inet_diag_msg_common_fill(r, sk); | |
373 | r->idiag_state = TCP_SYN_RECV; | |
374 | r->idiag_timer = 1; | |
d545caca | 375 | r->idiag_retrans = reqsk->num_retrans; |
a58917f5 ED |
376 | |
377 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
378 | offsetof(struct sock, sk_cookie)); | |
379 | ||
fa76ce73 | 380 | tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; |
3828a93f | 381 | r->idiag_expires = jiffies_delta_to_msecs(tmo); |
a58917f5 ED |
382 | r->idiag_rqueue = 0; |
383 | r->idiag_wqueue = 0; | |
384 | r->idiag_uid = 0; | |
385 | r->idiag_inode = 0; | |
386 | ||
d545caca LC |
387 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, |
388 | inet_rsk(reqsk)->ir_mark)) | |
389 | return -EMSGSIZE; | |
390 | ||
a58917f5 ED |
391 | nlmsg_end(skb, nlh); |
392 | return 0; | |
393 | } | |
394 | ||
dff2c035 | 395 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 396 | const struct inet_diag_req_v2 *r, |
d06ca956 | 397 | struct user_namespace *user_ns, |
15e47304 | 398 | u32 portid, u32 seq, u16 nlmsg_flags, |
d545caca | 399 | const struct nlmsghdr *unlh, bool net_admin) |
dff2c035 ACM |
400 | { |
401 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 402 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
403 | nlmsg_flags, unlh); |
404 | ||
a58917f5 ED |
405 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
406 | return inet_req_diag_fill(sk, skb, portid, seq, | |
d545caca | 407 | nlmsg_flags, unlh, net_admin); |
a58917f5 | 408 | |
efe4208f | 409 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
d545caca | 410 | nlmsg_flags, unlh, net_admin); |
dff2c035 ACM |
411 | } |
412 | ||
b613f56e LC |
413 | struct sock *inet_diag_find_one_icsk(struct net *net, |
414 | struct inet_hashinfo *hashinfo, | |
415 | const struct inet_diag_req_v2 *req) | |
1da177e4 | 416 | { |
e31c5e0e | 417 | struct sock *sk; |
d523a328 | 418 | |
2d331915 | 419 | rcu_read_lock(); |
e31c5e0e | 420 | if (req->sdiag_family == AF_INET) |
a583636a | 421 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0], |
73c1f4a0 ACM |
422 | req->id.idiag_dport, req->id.idiag_src[0], |
423 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 424 | #if IS_ENABLED(CONFIG_IPV6) |
7c130672 ED |
425 | else if (req->sdiag_family == AF_INET6) { |
426 | if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) && | |
427 | ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src)) | |
a583636a | 428 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3], |
7c130672 ED |
429 | req->id.idiag_dport, req->id.idiag_src[3], |
430 | req->id.idiag_sport, req->id.idiag_if); | |
431 | else | |
a583636a | 432 | sk = inet6_lookup(net, hashinfo, NULL, 0, |
7c130672 ED |
433 | (struct in6_addr *)req->id.idiag_dst, |
434 | req->id.idiag_dport, | |
435 | (struct in6_addr *)req->id.idiag_src, | |
436 | req->id.idiag_sport, | |
437 | req->id.idiag_if); | |
438 | } | |
1da177e4 | 439 | #endif |
2d331915 ED |
440 | else { |
441 | rcu_read_unlock(); | |
b613f56e | 442 | return ERR_PTR(-EINVAL); |
2d331915 ED |
443 | } |
444 | rcu_read_unlock(); | |
e31c5e0e | 445 | if (!sk) |
b613f56e | 446 | return ERR_PTR(-ENOENT); |
1da177e4 | 447 | |
b613f56e LC |
448 | if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) { |
449 | sock_gen_put(sk); | |
450 | return ERR_PTR(-ENOENT); | |
451 | } | |
452 | ||
453 | return sk; | |
454 | } | |
455 | EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk); | |
456 | ||
457 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, | |
458 | struct sk_buff *in_skb, | |
459 | const struct nlmsghdr *nlh, | |
460 | const struct inet_diag_req_v2 *req) | |
461 | { | |
b37e8840 | 462 | bool net_admin = netlink_net_capable(in_skb, CAP_NET_ADMIN); |
b613f56e LC |
463 | struct net *net = sock_net(in_skb->sk); |
464 | struct sk_buff *rep; | |
465 | struct sock *sk; | |
466 | int err; | |
467 | ||
468 | sk = inet_diag_find_one_icsk(net, hashinfo, req); | |
469 | if (IS_ERR(sk)) | |
470 | return PTR_ERR(sk); | |
1da177e4 | 471 | |
b37e8840 | 472 | rep = nlmsg_new(inet_sk_attr_size(sk, req, net_admin), GFP_KERNEL); |
6e277ed5 TG |
473 | if (!rep) { |
474 | err = -ENOMEM; | |
1da177e4 | 475 | goto out; |
6e277ed5 | 476 | } |
1da177e4 | 477 | |
a029fe26 | 478 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 479 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 480 | NETLINK_CB(in_skb).portid, |
b37e8840 | 481 | nlh->nlmsg_seq, 0, nlh, net_admin); |
26932566 PM |
482 | if (err < 0) { |
483 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 484 | nlmsg_free(rep); |
26932566 PM |
485 | goto out; |
486 | } | |
15e47304 | 487 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 488 | MSG_DONTWAIT); |
1da177e4 LT |
489 | if (err > 0) |
490 | err = 0; | |
491 | ||
492 | out: | |
c1d607cc ED |
493 | if (sk) |
494 | sock_gen_put(sk); | |
495 | ||
476f7dbf PE |
496 | return err; |
497 | } | |
1942c518 | 498 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf | 499 | |
6eb5d2e0 | 500 | static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb, |
476f7dbf | 501 | const struct nlmsghdr *nlh, |
34160ea3 | 502 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
503 | { |
504 | const struct inet_diag_handler *handler; | |
505 | int err; | |
506 | ||
507 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
508 | if (IS_ERR(handler)) | |
509 | err = PTR_ERR(handler); | |
6eb5d2e0 | 510 | else if (cmd == SOCK_DIAG_BY_FAMILY) |
1942c518 | 511 | err = handler->dump_one(in_skb, nlh, req); |
6eb5d2e0 LC |
512 | else if (cmd == SOCK_DESTROY && handler->destroy) |
513 | err = handler->destroy(in_skb, req); | |
514 | else | |
515 | err = -EOPNOTSUPP; | |
d523a328 | 516 | inet_diag_unlock_handler(handler); |
476f7dbf | 517 | |
1da177e4 LT |
518 | return err; |
519 | } | |
520 | ||
9f855299 | 521 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
522 | { |
523 | int words = bits >> 5; | |
524 | ||
525 | bits &= 0x1f; | |
526 | ||
527 | if (words) { | |
528 | if (memcmp(a1, a2, words << 2)) | |
529 | return 0; | |
530 | } | |
531 | if (bits) { | |
9f855299 AV |
532 | __be32 w1, w2; |
533 | __be32 mask; | |
1da177e4 LT |
534 | |
535 | w1 = a1[words]; | |
536 | w2 = a2[words]; | |
537 | ||
538 | mask = htonl((0xffffffff) << (32 - bits)); | |
539 | ||
540 | if ((w1 ^ w2) & mask) | |
541 | return 0; | |
542 | } | |
543 | ||
544 | return 1; | |
545 | } | |
546 | ||
87c22ea5 | 547 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 548 | const struct inet_diag_entry *entry) |
1da177e4 | 549 | { |
87c22ea5 PE |
550 | const void *bc = nla_data(_bc); |
551 | int len = nla_len(_bc); | |
552 | ||
1da177e4 LT |
553 | while (len > 0) { |
554 | int yes = 1; | |
73c1f4a0 | 555 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
556 | |
557 | switch (op->code) { | |
73c1f4a0 | 558 | case INET_DIAG_BC_NOP: |
1da177e4 | 559 | break; |
73c1f4a0 | 560 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
561 | yes = 0; |
562 | break; | |
bbb6189d KE |
563 | case INET_DIAG_BC_S_EQ: |
564 | yes = entry->sport == op[1].no; | |
565 | break; | |
73c1f4a0 | 566 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
567 | yes = entry->sport >= op[1].no; |
568 | break; | |
73c1f4a0 | 569 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 570 | yes = entry->sport <= op[1].no; |
1da177e4 | 571 | break; |
bbb6189d KE |
572 | case INET_DIAG_BC_D_EQ: |
573 | yes = entry->dport == op[1].no; | |
574 | break; | |
73c1f4a0 | 575 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
576 | yes = entry->dport >= op[1].no; |
577 | break; | |
73c1f4a0 | 578 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
579 | yes = entry->dport <= op[1].no; |
580 | break; | |
73c1f4a0 | 581 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
582 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
583 | break; | |
73c1f4a0 | 584 | case INET_DIAG_BC_S_COND: |
a8c2190e | 585 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
586 | const struct inet_diag_hostcond *cond; |
587 | const __be32 *addr; | |
1da177e4 | 588 | |
e31c5e0e | 589 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 590 | if (cond->port != -1 && |
73c1f4a0 | 591 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
592 | entry->sport : entry->dport)) { |
593 | yes = 0; | |
594 | break; | |
595 | } | |
4e852c02 | 596 | |
73c1f4a0 | 597 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
598 | addr = entry->saddr; |
599 | else | |
600 | addr = entry->daddr; | |
601 | ||
f67caec9 NC |
602 | if (cond->family != AF_UNSPEC && |
603 | cond->family != entry->family) { | |
604 | if (entry->family == AF_INET6 && | |
605 | cond->family == AF_INET) { | |
606 | if (addr[0] == 0 && addr[1] == 0 && | |
607 | addr[2] == htonl(0xffff) && | |
608 | bitstring_match(addr + 3, | |
609 | cond->addr, | |
610 | cond->prefix_len)) | |
611 | break; | |
612 | } | |
613 | yes = 0; | |
614 | break; | |
615 | } | |
616 | ||
617 | if (cond->prefix_len == 0) | |
618 | break; | |
4e852c02 ACM |
619 | if (bitstring_match(addr, cond->addr, |
620 | cond->prefix_len)) | |
1da177e4 | 621 | break; |
1da177e4 LT |
622 | yes = 0; |
623 | break; | |
624 | } | |
637c841d DA |
625 | case INET_DIAG_BC_DEV_COND: { |
626 | u32 ifindex; | |
627 | ||
628 | ifindex = *((const u32 *)(op + 1)); | |
629 | if (ifindex != entry->ifindex) | |
630 | yes = 0; | |
631 | break; | |
632 | } | |
a52e95ab LC |
633 | case INET_DIAG_BC_MARK_COND: { |
634 | struct inet_diag_markcond *cond; | |
635 | ||
636 | cond = (struct inet_diag_markcond *)(op + 1); | |
637 | if ((entry->mark & cond->mask) != cond->mark) | |
638 | yes = 0; | |
639 | break; | |
640 | } | |
1da177e4 LT |
641 | } |
642 | ||
4e852c02 | 643 | if (yes) { |
1da177e4 LT |
644 | len -= op->yes; |
645 | bc += op->yes; | |
646 | } else { | |
647 | len -= op->no; | |
648 | bc += op->no; | |
649 | } | |
650 | } | |
a02cec21 | 651 | return len == 0; |
1da177e4 LT |
652 | } |
653 | ||
a4458343 ED |
654 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
655 | */ | |
656 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
657 | const struct sock *sk) | |
658 | { | |
659 | #if IS_ENABLED(CONFIG_IPV6) | |
660 | if (sk->sk_family == AF_INET6) { | |
661 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
662 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
663 | } else | |
664 | #endif | |
665 | { | |
666 | entry->saddr = &sk->sk_rcv_saddr; | |
667 | entry->daddr = &sk->sk_daddr; | |
668 | } | |
669 | } | |
670 | ||
8d07d151 PE |
671 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
672 | { | |
8d07d151 | 673 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 674 | struct inet_diag_entry entry; |
8d07d151 | 675 | |
e31c5e0e | 676 | if (!bc) |
8d07d151 PE |
677 | return 1; |
678 | ||
679 | entry.family = sk->sk_family; | |
a4458343 | 680 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
681 | entry.sport = inet->inet_num; |
682 | entry.dport = ntohs(inet->inet_dport); | |
637c841d | 683 | entry.ifindex = sk->sk_bound_dev_if; |
a58917f5 | 684 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
a52e95ab LC |
685 | if (sk_fullsock(sk)) |
686 | entry.mark = sk->sk_mark; | |
687 | else if (sk->sk_state == TCP_NEW_SYN_RECV) | |
688 | entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark; | |
689 | else | |
690 | entry.mark = 0; | |
8d07d151 PE |
691 | |
692 | return inet_diag_bc_run(bc, &entry); | |
693 | } | |
694 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
695 | ||
1da177e4 LT |
696 | static int valid_cc(const void *bc, int len, int cc) |
697 | { | |
698 | while (len >= 0) { | |
73c1f4a0 | 699 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
700 | |
701 | if (cc > len) | |
702 | return 0; | |
703 | if (cc == len) | |
704 | return 1; | |
eeb14972 | 705 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
706 | return 0; |
707 | len -= op->yes; | |
708 | bc += op->yes; | |
709 | } | |
710 | return 0; | |
711 | } | |
712 | ||
637c841d DA |
713 | /* data is u32 ifindex */ |
714 | static bool valid_devcond(const struct inet_diag_bc_op *op, int len, | |
715 | int *min_len) | |
716 | { | |
717 | /* Check ifindex space. */ | |
718 | *min_len += sizeof(u32); | |
719 | if (len < *min_len) | |
720 | return false; | |
721 | ||
722 | return true; | |
723 | } | |
405c0059 NC |
724 | /* Validate an inet_diag_hostcond. */ |
725 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
726 | int *min_len) | |
727 | { | |
405c0059 | 728 | struct inet_diag_hostcond *cond; |
e31c5e0e | 729 | int addr_len; |
405c0059 NC |
730 | |
731 | /* Check hostcond space. */ | |
732 | *min_len += sizeof(struct inet_diag_hostcond); | |
733 | if (len < *min_len) | |
734 | return false; | |
735 | cond = (struct inet_diag_hostcond *)(op + 1); | |
736 | ||
737 | /* Check address family and address length. */ | |
738 | switch (cond->family) { | |
739 | case AF_UNSPEC: | |
740 | addr_len = 0; | |
741 | break; | |
742 | case AF_INET: | |
743 | addr_len = sizeof(struct in_addr); | |
744 | break; | |
745 | case AF_INET6: | |
746 | addr_len = sizeof(struct in6_addr); | |
747 | break; | |
748 | default: | |
749 | return false; | |
750 | } | |
751 | *min_len += addr_len; | |
752 | if (len < *min_len) | |
753 | return false; | |
754 | ||
755 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
756 | if (cond->prefix_len > 8 * addr_len) | |
757 | return false; | |
758 | ||
759 | return true; | |
760 | } | |
761 | ||
5e1f5420 | 762 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
763 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
764 | int len, int *min_len) | |
5e1f5420 NC |
765 | { |
766 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
767 | *min_len += sizeof(struct inet_diag_bc_op); | |
768 | if (len < *min_len) | |
769 | return false; | |
770 | return true; | |
771 | } | |
772 | ||
a52e95ab LC |
773 | static bool valid_markcond(const struct inet_diag_bc_op *op, int len, |
774 | int *min_len) | |
1da177e4 | 775 | { |
a52e95ab LC |
776 | *min_len += sizeof(struct inet_diag_markcond); |
777 | return len >= *min_len; | |
778 | } | |
779 | ||
780 | static int inet_diag_bc_audit(const struct nlattr *attr, | |
781 | const struct sk_buff *skb) | |
782 | { | |
783 | bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN); | |
627cc4ad LC |
784 | const void *bytecode, *bc; |
785 | int bytecode_len, len; | |
786 | ||
787 | if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op)) | |
788 | return -EINVAL; | |
789 | ||
790 | bytecode = bc = nla_data(attr); | |
791 | len = bytecode_len = nla_len(attr); | |
1da177e4 LT |
792 | |
793 | while (len > 0) { | |
405c0059 | 794 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 795 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 796 | |
1da177e4 | 797 | switch (op->code) { |
73c1f4a0 ACM |
798 | case INET_DIAG_BC_S_COND: |
799 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
800 | if (!valid_hostcond(bc, len, &min_len)) |
801 | return -EINVAL; | |
5e1f5420 | 802 | break; |
637c841d DA |
803 | case INET_DIAG_BC_DEV_COND: |
804 | if (!valid_devcond(bc, len, &min_len)) | |
805 | return -EINVAL; | |
806 | break; | |
bbb6189d | 807 | case INET_DIAG_BC_S_EQ: |
73c1f4a0 ACM |
808 | case INET_DIAG_BC_S_GE: |
809 | case INET_DIAG_BC_S_LE: | |
bbb6189d | 810 | case INET_DIAG_BC_D_EQ: |
73c1f4a0 ACM |
811 | case INET_DIAG_BC_D_GE: |
812 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 813 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
814 | return -EINVAL; |
815 | break; | |
a52e95ab LC |
816 | case INET_DIAG_BC_MARK_COND: |
817 | if (!net_admin) | |
818 | return -EPERM; | |
819 | if (!valid_markcond(bc, len, &min_len)) | |
820 | return -EINVAL; | |
821 | break; | |
5e1f5420 NC |
822 | case INET_DIAG_BC_AUTO: |
823 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 824 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
825 | break; |
826 | default: | |
827 | return -EINVAL; | |
828 | } | |
5e1f5420 NC |
829 | |
830 | if (op->code != INET_DIAG_BC_NOP) { | |
831 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
832 | return -EINVAL; | |
833 | if (op->no < len && | |
834 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
835 | return -EINVAL; | |
836 | } | |
837 | ||
405c0059 | 838 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 839 | return -EINVAL; |
4e852c02 | 840 | bc += op->yes; |
1da177e4 LT |
841 | len -= op->yes; |
842 | } | |
843 | return len == 0 ? 0 : -EINVAL; | |
844 | } | |
845 | ||
dff2c035 ACM |
846 | static int inet_csk_diag_dump(struct sock *sk, |
847 | struct sk_buff *skb, | |
37f352b5 | 848 | struct netlink_callback *cb, |
34160ea3 | 849 | const struct inet_diag_req_v2 *r, |
d545caca LC |
850 | const struct nlattr *bc, |
851 | bool net_admin) | |
1da177e4 | 852 | { |
8d07d151 PE |
853 | if (!inet_diag_bc_sk(bc, sk)) |
854 | return 0; | |
1da177e4 | 855 | |
a029fe26 | 856 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 857 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 858 | NETLINK_CB(cb->skb).portid, |
d545caca LC |
859 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh, |
860 | net_admin); | |
1da177e4 LT |
861 | } |
862 | ||
49612729 ED |
863 | static void twsk_build_assert(void) |
864 | { | |
865 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
866 | offsetof(struct sock, sk_family)); | |
867 | ||
868 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
869 | offsetof(struct inet_sock, inet_num)); | |
870 | ||
871 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
872 | offsetof(struct inet_sock, inet_dport)); | |
873 | ||
874 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
875 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
876 | ||
877 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
878 | offsetof(struct inet_sock, inet_daddr)); | |
879 | ||
880 | #if IS_ENABLED(CONFIG_IPV6) | |
881 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
882 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
883 | ||
884 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
885 | offsetof(struct sock, sk_v6_daddr)); | |
886 | #endif | |
887 | } | |
888 | ||
1942c518 | 889 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
e31c5e0e | 890 | struct netlink_callback *cb, |
34160ea3 | 891 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 | 892 | { |
67db3e4b | 893 | bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN); |
51d7cccf | 894 | struct net *net = sock_net(skb->sk); |
079096f1 | 895 | u32 idiag_states = r->idiag_states; |
67db3e4b ED |
896 | int i, num, s_i, s_num; |
897 | struct sock *sk; | |
4e852c02 | 898 | |
079096f1 ED |
899 | if (idiag_states & TCPF_SYN_RECV) |
900 | idiag_states |= TCPF_NEW_SYN_RECV; | |
1da177e4 LT |
901 | s_i = cb->args[1]; |
902 | s_num = num = cb->args[2]; | |
4f5736c4 | 903 | |
1da177e4 | 904 | if (cb->args[0] == 0) { |
9652dc2e | 905 | if (!(idiag_states & TCPF_LISTEN) || r->id.idiag_dport) |
1da177e4 | 906 | goto skip_listen_ht; |
540722ff | 907 | |
0f7ff927 | 908 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 909 | struct inet_listen_hashbucket *ilb; |
8dbd76e7 | 910 | struct hlist_nulls_node *node; |
1da177e4 LT |
911 | |
912 | num = 0; | |
5caea4ea | 913 | ilb = &hashinfo->listening_hash[i]; |
9652dc2e | 914 | spin_lock(&ilb->lock); |
8dbd76e7 | 915 | sk_nulls_for_each(sk, node, &ilb->nulls_head) { |
1da177e4 LT |
916 | struct inet_sock *inet = inet_sk(sk); |
917 | ||
51d7cccf AV |
918 | if (!net_eq(sock_net(sk), net)) |
919 | continue; | |
920 | ||
1da177e4 LT |
921 | if (num < s_num) { |
922 | num++; | |
923 | continue; | |
924 | } | |
925 | ||
d23deaa0 | 926 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 927 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
928 | goto next_listen; |
929 | ||
c720c7e8 | 930 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 931 | r->id.idiag_sport) |
1da177e4 LT |
932 | goto next_listen; |
933 | ||
d545caca LC |
934 | if (inet_csk_diag_dump(sk, skb, cb, r, |
935 | bc, net_admin) < 0) { | |
9652dc2e | 936 | spin_unlock(&ilb->lock); |
1da177e4 LT |
937 | goto done; |
938 | } | |
939 | ||
940 | next_listen: | |
1da177e4 LT |
941 | ++num; |
942 | } | |
9652dc2e | 943 | spin_unlock(&ilb->lock); |
1da177e4 LT |
944 | |
945 | s_num = 0; | |
1da177e4 | 946 | } |
1da177e4 LT |
947 | skip_listen_ht: |
948 | cb->args[0] = 1; | |
949 | s_i = num = s_num = 0; | |
950 | } | |
951 | ||
079096f1 | 952 | if (!(idiag_states & ~TCPF_LISTEN)) |
efb3cb42 | 953 | goto out; |
1da177e4 | 954 | |
67db3e4b | 955 | #define SKARR_SZ 16 |
f373b53b | 956 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 957 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 958 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 959 | struct hlist_nulls_node *node; |
67db3e4b ED |
960 | struct sock *sk_arr[SKARR_SZ]; |
961 | int num_arr[SKARR_SZ]; | |
962 | int idx, accum, res; | |
6be547a6 | 963 | |
05dbc7b5 | 964 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
965 | continue; |
966 | ||
1da177e4 LT |
967 | if (i > s_i) |
968 | s_num = 0; | |
969 | ||
67db3e4b ED |
970 | next_chunk: |
971 | num = 0; | |
972 | accum = 0; | |
7e3aab4a | 973 | spin_lock_bh(lock); |
3ab5aee7 | 974 | sk_nulls_for_each(sk, node, &head->chain) { |
67db3e4b | 975 | int state; |
1da177e4 | 976 | |
51d7cccf AV |
977 | if (!net_eq(sock_net(sk), net)) |
978 | continue; | |
1da177e4 LT |
979 | if (num < s_num) |
980 | goto next_normal; | |
70315d22 NC |
981 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
982 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
079096f1 | 983 | if (!(idiag_states & (1 << state))) |
1da177e4 | 984 | goto next_normal; |
d23deaa0 | 985 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 986 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 987 | goto next_normal; |
05dbc7b5 | 988 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 989 | r->id.idiag_sport) |
1da177e4 | 990 | goto next_normal; |
05dbc7b5 | 991 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 992 | r->id.idiag_dport) |
1da177e4 | 993 | goto next_normal; |
a58917f5 ED |
994 | twsk_build_assert(); |
995 | ||
996 | if (!inet_diag_bc_sk(bc, sk)) | |
997 | goto next_normal; | |
998 | ||
f0c928d8 ED |
999 | if (!refcount_inc_not_zero(&sk->sk_refcnt)) |
1000 | goto next_normal; | |
1001 | ||
67db3e4b ED |
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 */); |