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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
73c1f4a0 | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 3 | * |
1da177e4 LT |
4 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
172589cc | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/random.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/cache.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/time.h> | |
21 | ||
22 | #include <net/icmp.h> | |
23 | #include <net/tcp.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <net/inet_common.h> | |
505cbfc5 ACM |
26 | #include <net/inet_connection_sock.h> |
27 | #include <net/inet_hashtables.h> | |
28 | #include <net/inet_timewait_sock.h> | |
29 | #include <net/inet6_hashtables.h> | |
dc5fc579 | 30 | #include <net/netlink.h> |
1da177e4 LT |
31 | |
32 | #include <linux/inet.h> | |
33 | #include <linux/stddef.h> | |
34 | ||
a8c2190e | 35 | #include <linux/inet_diag.h> |
d366477a | 36 | #include <linux/sock_diag.h> |
1da177e4 | 37 | |
4f5736c4 ACM |
38 | static const struct inet_diag_handler **inet_diag_table; |
39 | ||
73c1f4a0 | 40 | struct inet_diag_entry { |
e31c5e0e ED |
41 | const __be32 *saddr; |
42 | const __be32 *daddr; | |
1da177e4 LT |
43 | u16 sport; |
44 | u16 dport; | |
45 | u16 family; | |
46 | u16 userlocks; | |
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]) |
aec8dc62 PE |
56 | request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK, |
57 | NETLINK_SOCK_DIAG, AF_INET, proto); | |
d523a328 HX |
58 | |
59 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 60 | if (!inet_diag_table[proto]) |
d523a328 HX |
61 | return ERR_PTR(-ENOENT); |
62 | ||
f13c95f0 | 63 | return inet_diag_table[proto]; |
d523a328 HX |
64 | } |
65 | ||
e31c5e0e | 66 | static void inet_diag_unlock_handler(const struct inet_diag_handler *handler) |
d523a328 HX |
67 | { |
68 | mutex_unlock(&inet_diag_table_mutex); | |
69 | } | |
70 | ||
cb2050a7 | 71 | void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) |
a4458343 ED |
72 | { |
73 | r->idiag_family = sk->sk_family; | |
74 | ||
75 | r->id.idiag_sport = htons(sk->sk_num); | |
76 | r->id.idiag_dport = sk->sk_dport; | |
77 | r->id.idiag_if = sk->sk_bound_dev_if; | |
78 | sock_diag_save_cookie(sk, r->id.idiag_cookie); | |
79 | ||
80 | #if IS_ENABLED(CONFIG_IPV6) | |
81 | if (sk->sk_family == AF_INET6) { | |
82 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; | |
83 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; | |
84 | } else | |
85 | #endif | |
86 | { | |
87 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
88 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
89 | ||
90 | r->id.idiag_src[0] = sk->sk_rcv_saddr; | |
91 | r->id.idiag_dst[0] = sk->sk_daddr; | |
92 | } | |
93 | } | |
cb2050a7 | 94 | EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill); |
a4458343 | 95 | |
b37e8840 ID |
96 | static size_t inet_sk_attr_size(struct sock *sk, |
97 | const struct inet_diag_req_v2 *req, | |
98 | bool net_admin) | |
c8e2c80d | 99 | { |
b37e8840 ID |
100 | const struct inet_diag_handler *handler; |
101 | size_t aux = 0; | |
102 | ||
103 | handler = inet_diag_table[req->sdiag_protocol]; | |
104 | if (handler && handler->idiag_get_aux_size) | |
105 | aux = handler->idiag_get_aux_size(sk, net_admin); | |
106 | ||
c8e2c80d ED |
107 | return nla_total_size(sizeof(struct tcp_info)) |
108 | + nla_total_size(1) /* INET_DIAG_SHUTDOWN */ | |
109 | + nla_total_size(1) /* INET_DIAG_TOS */ | |
110 | + nla_total_size(1) /* INET_DIAG_TCLASS */ | |
d545caca | 111 | + nla_total_size(4) /* INET_DIAG_MARK */ |
a67d7058 | 112 | + nla_total_size(4) /* INET_DIAG_CLASS_ID */ |
c8e2c80d ED |
113 | + nla_total_size(sizeof(struct inet_diag_meminfo)) |
114 | + nla_total_size(sizeof(struct inet_diag_msg)) | |
115 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) | |
116 | + nla_total_size(TCP_CA_NAME_MAX) | |
117 | + nla_total_size(sizeof(struct tcpvegas_info)) | |
b37e8840 | 118 | + aux |
c8e2c80d ED |
119 | + 64; |
120 | } | |
121 | ||
cb2050a7 XL |
122 | int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb, |
123 | struct inet_diag_msg *r, int ext, | |
d545caca LC |
124 | struct user_namespace *user_ns, |
125 | bool net_admin) | |
cb2050a7 XL |
126 | { |
127 | const struct inet_sock *inet = inet_sk(sk); | |
128 | ||
129 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) | |
130 | goto errout; | |
131 | ||
132 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, | |
133 | * hence this needs to be included regardless of socket family. | |
134 | */ | |
135 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
136 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) | |
137 | goto errout; | |
138 | ||
139 | #if IS_ENABLED(CONFIG_IPV6) | |
140 | if (r->idiag_family == AF_INET6) { | |
141 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) | |
142 | if (nla_put_u8(skb, INET_DIAG_TCLASS, | |
143 | inet6_sk(sk)->tclass) < 0) | |
144 | goto errout; | |
145 | ||
146 | if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
147 | nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk))) | |
148 | goto errout; | |
149 | } | |
150 | #endif | |
151 | ||
d545caca LC |
152 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark)) |
153 | goto errout; | |
154 | ||
cb2050a7 XL |
155 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
156 | r->idiag_inode = sock_i_ino(sk); | |
157 | ||
158 | return 0; | |
159 | errout: | |
160 | return 1; | |
161 | } | |
162 | EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill); | |
163 | ||
3c4d05c8 | 164 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 165 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
166 | struct user_namespace *user_ns, |
167 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca LC |
168 | const struct nlmsghdr *unlh, |
169 | bool net_admin) | |
1da177e4 | 170 | { |
521f1cf1 | 171 | const struct tcp_congestion_ops *ca_ops; |
e31c5e0e ED |
172 | const struct inet_diag_handler *handler; |
173 | int ext = req->idiag_ext; | |
73c1f4a0 | 174 | struct inet_diag_msg *r; |
1da177e4 | 175 | struct nlmsghdr *nlh; |
6e277ed5 | 176 | struct nlattr *attr; |
4f5736c4 | 177 | void *info = NULL; |
4f5736c4 | 178 | |
a029fe26 | 179 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 180 | BUG_ON(!handler); |
1da177e4 | 181 | |
15e47304 | 182 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
183 | nlmsg_flags); |
184 | if (!nlh) | |
d106352d | 185 | return -EMSGSIZE; |
4f5736c4 | 186 | |
d106352d | 187 | r = nlmsg_data(nlh); |
a58917f5 | 188 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 189 | |
a4458343 | 190 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
191 | r->idiag_state = sk->sk_state; |
192 | r->idiag_timer = 0; | |
193 | r->idiag_retrans = 0; | |
1da177e4 | 194 | |
d545caca | 195 | if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin)) |
e4e541a8 PE |
196 | goto errout; |
197 | ||
6e277ed5 TG |
198 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
199 | struct inet_diag_meminfo minfo = { | |
200 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
201 | .idiag_wmem = sk->sk_wmem_queued, | |
202 | .idiag_fmem = sk->sk_forward_alloc, | |
203 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
204 | }; | |
205 | ||
206 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
207 | goto errout; | |
3c4d05c8 PE |
208 | } |
209 | ||
c0636faa PE |
210 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
211 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 212 | goto errout; |
c0636faa | 213 | |
432490f9 CG |
214 | /* |
215 | * RAW sockets might have user-defined protocols assigned, | |
216 | * so report the one supplied on socket creation. | |
217 | */ | |
218 | if (sk->sk_type == SOCK_RAW) { | |
219 | if (nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol)) | |
220 | goto errout; | |
221 | } | |
222 | ||
e31c5e0e | 223 | if (!icsk) { |
62ad6fcd | 224 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
225 | goto out; |
226 | } | |
227 | ||
6ba8a3b1 | 228 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
57dde7f7 | 229 | icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT || |
6ba8a3b1 | 230 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { |
73c1f4a0 ACM |
231 | r->idiag_timer = 1; |
232 | r->idiag_retrans = icsk->icsk_retransmits; | |
b7de529c XL |
233 | r->idiag_expires = |
234 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
463c84b9 | 235 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
236 | r->idiag_timer = 4; |
237 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
238 | r->idiag_expires = |
239 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
1da177e4 | 240 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
241 | r->idiag_timer = 2; |
242 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
243 | r->idiag_expires = |
244 | jiffies_to_msecs(sk->sk_timer.expires - jiffies); | |
1da177e4 | 245 | } else { |
73c1f4a0 ACM |
246 | r->idiag_timer = 0; |
247 | r->idiag_expires = 0; | |
1da177e4 | 248 | } |
540722ff | 249 | |
3fd22af8 | 250 | if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { |
6ed46d12 ND |
251 | attr = nla_reserve_64bit(skb, INET_DIAG_INFO, |
252 | handler->idiag_info_size, | |
253 | INET_DIAG_PAD); | |
6e277ed5 TG |
254 | if (!attr) |
255 | goto errout; | |
3c4d05c8 | 256 | |
6e277ed5 | 257 | info = nla_data(attr); |
1da177e4 LT |
258 | } |
259 | ||
521f1cf1 ED |
260 | if (ext & (1 << (INET_DIAG_CONG - 1))) { |
261 | int err = 0; | |
262 | ||
263 | rcu_read_lock(); | |
264 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
265 | if (ca_ops) | |
266 | err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); | |
267 | rcu_read_unlock(); | |
268 | if (err < 0) | |
6e277ed5 | 269 | goto errout; |
521f1cf1 | 270 | } |
6e277ed5 | 271 | |
4f5736c4 | 272 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 273 | |
b37e8840 ID |
274 | if (ext & (1 << (INET_DIAG_INFO - 1)) && handler->idiag_get_aux) |
275 | if (handler->idiag_get_aux(sk, net_admin, skb) < 0) | |
276 | goto errout; | |
277 | ||
521f1cf1 | 278 | if (sk->sk_state < TCP_TIME_WAIT) { |
64f40ff5 ED |
279 | union tcp_cc_info info; |
280 | size_t sz = 0; | |
281 | int attr; | |
521f1cf1 ED |
282 | |
283 | rcu_read_lock(); | |
284 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
285 | if (ca_ops && ca_ops->get_info) | |
64f40ff5 | 286 | sz = ca_ops->get_info(sk, ext, &attr, &info); |
521f1cf1 | 287 | rcu_read_unlock(); |
64f40ff5 | 288 | if (sz && nla_put(skb, attr, sz, &info) < 0) |
521f1cf1 ED |
289 | goto errout; |
290 | } | |
1da177e4 | 291 | |
a67d7058 KK |
292 | if (ext & (1 << (INET_DIAG_CLASS_ID - 1)) || |
293 | ext & (1 << (INET_DIAG_TCLASS - 1))) { | |
0888e372 LASL |
294 | u32 classid = 0; |
295 | ||
296 | #ifdef CONFIG_SOCK_CGROUP_DATA | |
297 | classid = sock_cgroup_classid(&sk->sk_cgrp_data); | |
298 | #endif | |
a67d7058 KK |
299 | /* Fallback to socket priority if class id isn't set. |
300 | * Classful qdiscs use it as direct reference to class. | |
301 | * For cgroup2 classid is always zero. | |
302 | */ | |
303 | if (!classid) | |
304 | classid = sk->sk_priority; | |
0888e372 LASL |
305 | |
306 | if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid)) | |
307 | goto errout; | |
308 | } | |
309 | ||
3c4d05c8 | 310 | out: |
053c095a JB |
311 | nlmsg_end(skb, nlh); |
312 | return 0; | |
1da177e4 | 313 | |
6e277ed5 TG |
314 | errout: |
315 | nlmsg_cancel(skb, nlh); | |
26932566 | 316 | return -EMSGSIZE; |
1da177e4 | 317 | } |
3c4d05c8 PE |
318 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
319 | ||
320 | static int inet_csk_diag_fill(struct sock *sk, | |
e31c5e0e | 321 | struct sk_buff *skb, |
34160ea3 | 322 | const struct inet_diag_req_v2 *req, |
d06ca956 | 323 | struct user_namespace *user_ns, |
15e47304 | 324 | u32 portid, u32 seq, u16 nlmsg_flags, |
d545caca LC |
325 | const struct nlmsghdr *unlh, |
326 | bool net_admin) | |
3c4d05c8 | 327 | { |
d545caca LC |
328 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, user_ns, |
329 | portid, seq, nlmsg_flags, unlh, net_admin); | |
3c4d05c8 | 330 | } |
1da177e4 | 331 | |
33cf7c90 | 332 | static int inet_twsk_diag_fill(struct sock *sk, |
e31c5e0e | 333 | struct sk_buff *skb, |
15e47304 | 334 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
335 | const struct nlmsghdr *unlh) |
336 | { | |
33cf7c90 | 337 | struct inet_timewait_sock *tw = inet_twsk(sk); |
c7d58aab | 338 | struct inet_diag_msg *r; |
6e277ed5 | 339 | struct nlmsghdr *nlh; |
789f558c | 340 | long tmo; |
d106352d | 341 | |
15e47304 | 342 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
343 | nlmsg_flags); |
344 | if (!nlh) | |
d106352d | 345 | return -EMSGSIZE; |
c7d58aab | 346 | |
d106352d | 347 | r = nlmsg_data(nlh); |
c7d58aab ACM |
348 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
349 | ||
789f558c | 350 | tmo = tw->tw_timer.expires - jiffies; |
c7d58aab ACM |
351 | if (tmo < 0) |
352 | tmo = 0; | |
353 | ||
a4458343 | 354 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 355 | r->idiag_retrans = 0; |
b1aac815 | 356 | |
c7d58aab ACM |
357 | r->idiag_state = tw->tw_substate; |
358 | r->idiag_timer = 3; | |
96f817fe | 359 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
360 | r->idiag_rqueue = 0; |
361 | r->idiag_wqueue = 0; | |
362 | r->idiag_uid = 0; | |
363 | r->idiag_inode = 0; | |
6e277ed5 | 364 | |
053c095a JB |
365 | nlmsg_end(skb, nlh); |
366 | return 0; | |
c7d58aab ACM |
367 | } |
368 | ||
a58917f5 ED |
369 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
370 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca | 371 | const struct nlmsghdr *unlh, bool net_admin) |
a58917f5 | 372 | { |
d545caca | 373 | struct request_sock *reqsk = inet_reqsk(sk); |
a58917f5 ED |
374 | struct inet_diag_msg *r; |
375 | struct nlmsghdr *nlh; | |
376 | long tmo; | |
377 | ||
378 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
379 | nlmsg_flags); | |
380 | if (!nlh) | |
381 | return -EMSGSIZE; | |
382 | ||
383 | r = nlmsg_data(nlh); | |
384 | inet_diag_msg_common_fill(r, sk); | |
385 | r->idiag_state = TCP_SYN_RECV; | |
386 | r->idiag_timer = 1; | |
d545caca | 387 | r->idiag_retrans = reqsk->num_retrans; |
a58917f5 ED |
388 | |
389 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
390 | offsetof(struct sock, sk_cookie)); | |
391 | ||
fa76ce73 | 392 | tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; |
a58917f5 ED |
393 | r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0; |
394 | r->idiag_rqueue = 0; | |
395 | r->idiag_wqueue = 0; | |
396 | r->idiag_uid = 0; | |
397 | r->idiag_inode = 0; | |
398 | ||
d545caca LC |
399 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, |
400 | inet_rsk(reqsk)->ir_mark)) | |
401 | return -EMSGSIZE; | |
402 | ||
a58917f5 ED |
403 | nlmsg_end(skb, nlh); |
404 | return 0; | |
405 | } | |
406 | ||
dff2c035 | 407 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 408 | const struct inet_diag_req_v2 *r, |
d06ca956 | 409 | struct user_namespace *user_ns, |
15e47304 | 410 | u32 portid, u32 seq, u16 nlmsg_flags, |
d545caca | 411 | const struct nlmsghdr *unlh, bool net_admin) |
dff2c035 ACM |
412 | { |
413 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 414 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
415 | nlmsg_flags, unlh); |
416 | ||
a58917f5 ED |
417 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
418 | return inet_req_diag_fill(sk, skb, portid, seq, | |
d545caca | 419 | nlmsg_flags, unlh, net_admin); |
a58917f5 | 420 | |
efe4208f | 421 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
d545caca | 422 | nlmsg_flags, unlh, net_admin); |
dff2c035 ACM |
423 | } |
424 | ||
b613f56e LC |
425 | struct sock *inet_diag_find_one_icsk(struct net *net, |
426 | struct inet_hashinfo *hashinfo, | |
427 | const struct inet_diag_req_v2 *req) | |
1da177e4 | 428 | { |
e31c5e0e | 429 | struct sock *sk; |
d523a328 | 430 | |
2d331915 | 431 | rcu_read_lock(); |
e31c5e0e | 432 | if (req->sdiag_family == AF_INET) |
a583636a | 433 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0], |
73c1f4a0 ACM |
434 | req->id.idiag_dport, req->id.idiag_src[0], |
435 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 436 | #if IS_ENABLED(CONFIG_IPV6) |
7c130672 ED |
437 | else if (req->sdiag_family == AF_INET6) { |
438 | if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) && | |
439 | ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src)) | |
a583636a | 440 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3], |
7c130672 ED |
441 | req->id.idiag_dport, req->id.idiag_src[3], |
442 | req->id.idiag_sport, req->id.idiag_if); | |
443 | else | |
a583636a | 444 | sk = inet6_lookup(net, hashinfo, NULL, 0, |
7c130672 ED |
445 | (struct in6_addr *)req->id.idiag_dst, |
446 | req->id.idiag_dport, | |
447 | (struct in6_addr *)req->id.idiag_src, | |
448 | req->id.idiag_sport, | |
449 | req->id.idiag_if); | |
450 | } | |
1da177e4 | 451 | #endif |
2d331915 ED |
452 | else { |
453 | rcu_read_unlock(); | |
b613f56e | 454 | return ERR_PTR(-EINVAL); |
2d331915 ED |
455 | } |
456 | rcu_read_unlock(); | |
e31c5e0e | 457 | if (!sk) |
b613f56e | 458 | return ERR_PTR(-ENOENT); |
1da177e4 | 459 | |
b613f56e LC |
460 | if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) { |
461 | sock_gen_put(sk); | |
462 | return ERR_PTR(-ENOENT); | |
463 | } | |
464 | ||
465 | return sk; | |
466 | } | |
467 | EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk); | |
468 | ||
469 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, | |
470 | struct sk_buff *in_skb, | |
471 | const struct nlmsghdr *nlh, | |
472 | const struct inet_diag_req_v2 *req) | |
473 | { | |
b37e8840 | 474 | bool net_admin = netlink_net_capable(in_skb, CAP_NET_ADMIN); |
b613f56e LC |
475 | struct net *net = sock_net(in_skb->sk); |
476 | struct sk_buff *rep; | |
477 | struct sock *sk; | |
478 | int err; | |
479 | ||
480 | sk = inet_diag_find_one_icsk(net, hashinfo, req); | |
481 | if (IS_ERR(sk)) | |
482 | return PTR_ERR(sk); | |
1da177e4 | 483 | |
b37e8840 | 484 | rep = nlmsg_new(inet_sk_attr_size(sk, req, net_admin), GFP_KERNEL); |
6e277ed5 TG |
485 | if (!rep) { |
486 | err = -ENOMEM; | |
1da177e4 | 487 | goto out; |
6e277ed5 | 488 | } |
1da177e4 | 489 | |
a029fe26 | 490 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 491 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 492 | NETLINK_CB(in_skb).portid, |
b37e8840 | 493 | nlh->nlmsg_seq, 0, nlh, net_admin); |
26932566 PM |
494 | if (err < 0) { |
495 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 496 | nlmsg_free(rep); |
26932566 PM |
497 | goto out; |
498 | } | |
15e47304 | 499 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 500 | MSG_DONTWAIT); |
1da177e4 LT |
501 | if (err > 0) |
502 | err = 0; | |
503 | ||
504 | out: | |
c1d607cc ED |
505 | if (sk) |
506 | sock_gen_put(sk); | |
507 | ||
476f7dbf PE |
508 | return err; |
509 | } | |
1942c518 | 510 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf | 511 | |
6eb5d2e0 | 512 | static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb, |
476f7dbf | 513 | const struct nlmsghdr *nlh, |
34160ea3 | 514 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
515 | { |
516 | const struct inet_diag_handler *handler; | |
517 | int err; | |
518 | ||
519 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
520 | if (IS_ERR(handler)) | |
521 | err = PTR_ERR(handler); | |
6eb5d2e0 | 522 | else if (cmd == SOCK_DIAG_BY_FAMILY) |
1942c518 | 523 | err = handler->dump_one(in_skb, nlh, req); |
6eb5d2e0 LC |
524 | else if (cmd == SOCK_DESTROY && handler->destroy) |
525 | err = handler->destroy(in_skb, req); | |
526 | else | |
527 | err = -EOPNOTSUPP; | |
d523a328 | 528 | inet_diag_unlock_handler(handler); |
476f7dbf | 529 | |
1da177e4 LT |
530 | return err; |
531 | } | |
532 | ||
9f855299 | 533 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
534 | { |
535 | int words = bits >> 5; | |
536 | ||
537 | bits &= 0x1f; | |
538 | ||
539 | if (words) { | |
540 | if (memcmp(a1, a2, words << 2)) | |
541 | return 0; | |
542 | } | |
543 | if (bits) { | |
9f855299 AV |
544 | __be32 w1, w2; |
545 | __be32 mask; | |
1da177e4 LT |
546 | |
547 | w1 = a1[words]; | |
548 | w2 = a2[words]; | |
549 | ||
550 | mask = htonl((0xffffffff) << (32 - bits)); | |
551 | ||
552 | if ((w1 ^ w2) & mask) | |
553 | return 0; | |
554 | } | |
555 | ||
556 | return 1; | |
557 | } | |
558 | ||
87c22ea5 | 559 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 560 | const struct inet_diag_entry *entry) |
1da177e4 | 561 | { |
87c22ea5 PE |
562 | const void *bc = nla_data(_bc); |
563 | int len = nla_len(_bc); | |
564 | ||
1da177e4 LT |
565 | while (len > 0) { |
566 | int yes = 1; | |
73c1f4a0 | 567 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
568 | |
569 | switch (op->code) { | |
73c1f4a0 | 570 | case INET_DIAG_BC_NOP: |
1da177e4 | 571 | break; |
73c1f4a0 | 572 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
573 | yes = 0; |
574 | break; | |
73c1f4a0 | 575 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
576 | yes = entry->sport >= op[1].no; |
577 | break; | |
73c1f4a0 | 578 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 579 | yes = entry->sport <= op[1].no; |
1da177e4 | 580 | break; |
73c1f4a0 | 581 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
582 | yes = entry->dport >= op[1].no; |
583 | break; | |
73c1f4a0 | 584 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
585 | yes = entry->dport <= op[1].no; |
586 | break; | |
73c1f4a0 | 587 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
588 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
589 | break; | |
73c1f4a0 | 590 | case INET_DIAG_BC_S_COND: |
a8c2190e | 591 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
592 | const struct inet_diag_hostcond *cond; |
593 | const __be32 *addr; | |
1da177e4 | 594 | |
e31c5e0e | 595 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 596 | if (cond->port != -1 && |
73c1f4a0 | 597 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
598 | entry->sport : entry->dport)) { |
599 | yes = 0; | |
600 | break; | |
601 | } | |
4e852c02 | 602 | |
73c1f4a0 | 603 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
604 | addr = entry->saddr; |
605 | else | |
606 | addr = entry->daddr; | |
607 | ||
f67caec9 NC |
608 | if (cond->family != AF_UNSPEC && |
609 | cond->family != entry->family) { | |
610 | if (entry->family == AF_INET6 && | |
611 | cond->family == AF_INET) { | |
612 | if (addr[0] == 0 && addr[1] == 0 && | |
613 | addr[2] == htonl(0xffff) && | |
614 | bitstring_match(addr + 3, | |
615 | cond->addr, | |
616 | cond->prefix_len)) | |
617 | break; | |
618 | } | |
619 | yes = 0; | |
620 | break; | |
621 | } | |
622 | ||
623 | if (cond->prefix_len == 0) | |
624 | break; | |
4e852c02 ACM |
625 | if (bitstring_match(addr, cond->addr, |
626 | cond->prefix_len)) | |
1da177e4 | 627 | break; |
1da177e4 LT |
628 | yes = 0; |
629 | break; | |
630 | } | |
637c841d DA |
631 | case INET_DIAG_BC_DEV_COND: { |
632 | u32 ifindex; | |
633 | ||
634 | ifindex = *((const u32 *)(op + 1)); | |
635 | if (ifindex != entry->ifindex) | |
636 | yes = 0; | |
637 | break; | |
638 | } | |
a52e95ab LC |
639 | case INET_DIAG_BC_MARK_COND: { |
640 | struct inet_diag_markcond *cond; | |
641 | ||
642 | cond = (struct inet_diag_markcond *)(op + 1); | |
643 | if ((entry->mark & cond->mask) != cond->mark) | |
644 | yes = 0; | |
645 | break; | |
646 | } | |
1da177e4 LT |
647 | } |
648 | ||
4e852c02 | 649 | if (yes) { |
1da177e4 LT |
650 | len -= op->yes; |
651 | bc += op->yes; | |
652 | } else { | |
653 | len -= op->no; | |
654 | bc += op->no; | |
655 | } | |
656 | } | |
a02cec21 | 657 | return len == 0; |
1da177e4 LT |
658 | } |
659 | ||
a4458343 ED |
660 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
661 | */ | |
662 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
663 | const struct sock *sk) | |
664 | { | |
665 | #if IS_ENABLED(CONFIG_IPV6) | |
666 | if (sk->sk_family == AF_INET6) { | |
667 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
668 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
669 | } else | |
670 | #endif | |
671 | { | |
672 | entry->saddr = &sk->sk_rcv_saddr; | |
673 | entry->daddr = &sk->sk_daddr; | |
674 | } | |
675 | } | |
676 | ||
8d07d151 PE |
677 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
678 | { | |
8d07d151 | 679 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 680 | struct inet_diag_entry entry; |
8d07d151 | 681 | |
e31c5e0e | 682 | if (!bc) |
8d07d151 PE |
683 | return 1; |
684 | ||
685 | entry.family = sk->sk_family; | |
a4458343 | 686 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
687 | entry.sport = inet->inet_num; |
688 | entry.dport = ntohs(inet->inet_dport); | |
637c841d | 689 | entry.ifindex = sk->sk_bound_dev_if; |
a58917f5 | 690 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
a52e95ab LC |
691 | if (sk_fullsock(sk)) |
692 | entry.mark = sk->sk_mark; | |
693 | else if (sk->sk_state == TCP_NEW_SYN_RECV) | |
694 | entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark; | |
695 | else | |
696 | entry.mark = 0; | |
8d07d151 PE |
697 | |
698 | return inet_diag_bc_run(bc, &entry); | |
699 | } | |
700 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
701 | ||
1da177e4 LT |
702 | static int valid_cc(const void *bc, int len, int cc) |
703 | { | |
704 | while (len >= 0) { | |
73c1f4a0 | 705 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
706 | |
707 | if (cc > len) | |
708 | return 0; | |
709 | if (cc == len) | |
710 | return 1; | |
eeb14972 | 711 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
712 | return 0; |
713 | len -= op->yes; | |
714 | bc += op->yes; | |
715 | } | |
716 | return 0; | |
717 | } | |
718 | ||
637c841d DA |
719 | /* data is u32 ifindex */ |
720 | static bool valid_devcond(const struct inet_diag_bc_op *op, int len, | |
721 | int *min_len) | |
722 | { | |
723 | /* Check ifindex space. */ | |
724 | *min_len += sizeof(u32); | |
725 | if (len < *min_len) | |
726 | return false; | |
727 | ||
728 | return true; | |
729 | } | |
405c0059 NC |
730 | /* Validate an inet_diag_hostcond. */ |
731 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
732 | int *min_len) | |
733 | { | |
405c0059 | 734 | struct inet_diag_hostcond *cond; |
e31c5e0e | 735 | int addr_len; |
405c0059 NC |
736 | |
737 | /* Check hostcond space. */ | |
738 | *min_len += sizeof(struct inet_diag_hostcond); | |
739 | if (len < *min_len) | |
740 | return false; | |
741 | cond = (struct inet_diag_hostcond *)(op + 1); | |
742 | ||
743 | /* Check address family and address length. */ | |
744 | switch (cond->family) { | |
745 | case AF_UNSPEC: | |
746 | addr_len = 0; | |
747 | break; | |
748 | case AF_INET: | |
749 | addr_len = sizeof(struct in_addr); | |
750 | break; | |
751 | case AF_INET6: | |
752 | addr_len = sizeof(struct in6_addr); | |
753 | break; | |
754 | default: | |
755 | return false; | |
756 | } | |
757 | *min_len += addr_len; | |
758 | if (len < *min_len) | |
759 | return false; | |
760 | ||
761 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
762 | if (cond->prefix_len > 8 * addr_len) | |
763 | return false; | |
764 | ||
765 | return true; | |
766 | } | |
767 | ||
5e1f5420 | 768 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
769 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
770 | int len, int *min_len) | |
5e1f5420 NC |
771 | { |
772 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
773 | *min_len += sizeof(struct inet_diag_bc_op); | |
774 | if (len < *min_len) | |
775 | return false; | |
776 | return true; | |
777 | } | |
778 | ||
a52e95ab LC |
779 | static bool valid_markcond(const struct inet_diag_bc_op *op, int len, |
780 | int *min_len) | |
1da177e4 | 781 | { |
a52e95ab LC |
782 | *min_len += sizeof(struct inet_diag_markcond); |
783 | return len >= *min_len; | |
784 | } | |
785 | ||
786 | static int inet_diag_bc_audit(const struct nlattr *attr, | |
787 | const struct sk_buff *skb) | |
788 | { | |
789 | bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN); | |
627cc4ad LC |
790 | const void *bytecode, *bc; |
791 | int bytecode_len, len; | |
792 | ||
793 | if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op)) | |
794 | return -EINVAL; | |
795 | ||
796 | bytecode = bc = nla_data(attr); | |
797 | len = bytecode_len = nla_len(attr); | |
1da177e4 LT |
798 | |
799 | while (len > 0) { | |
405c0059 | 800 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 801 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 802 | |
1da177e4 | 803 | switch (op->code) { |
73c1f4a0 ACM |
804 | case INET_DIAG_BC_S_COND: |
805 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
806 | if (!valid_hostcond(bc, len, &min_len)) |
807 | return -EINVAL; | |
5e1f5420 | 808 | break; |
637c841d DA |
809 | case INET_DIAG_BC_DEV_COND: |
810 | if (!valid_devcond(bc, len, &min_len)) | |
811 | return -EINVAL; | |
812 | break; | |
73c1f4a0 ACM |
813 | case INET_DIAG_BC_S_GE: |
814 | case INET_DIAG_BC_S_LE: | |
815 | case INET_DIAG_BC_D_GE: | |
816 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 817 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
818 | return -EINVAL; |
819 | break; | |
a52e95ab LC |
820 | case INET_DIAG_BC_MARK_COND: |
821 | if (!net_admin) | |
822 | return -EPERM; | |
823 | if (!valid_markcond(bc, len, &min_len)) | |
824 | return -EINVAL; | |
825 | break; | |
5e1f5420 NC |
826 | case INET_DIAG_BC_AUTO: |
827 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 828 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
829 | break; |
830 | default: | |
831 | return -EINVAL; | |
832 | } | |
5e1f5420 NC |
833 | |
834 | if (op->code != INET_DIAG_BC_NOP) { | |
835 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
836 | return -EINVAL; | |
837 | if (op->no < len && | |
838 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
839 | return -EINVAL; | |
840 | } | |
841 | ||
405c0059 | 842 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 843 | return -EINVAL; |
4e852c02 | 844 | bc += op->yes; |
1da177e4 LT |
845 | len -= op->yes; |
846 | } | |
847 | return len == 0 ? 0 : -EINVAL; | |
848 | } | |
849 | ||
dff2c035 ACM |
850 | static int inet_csk_diag_dump(struct sock *sk, |
851 | struct sk_buff *skb, | |
37f352b5 | 852 | struct netlink_callback *cb, |
34160ea3 | 853 | const struct inet_diag_req_v2 *r, |
d545caca LC |
854 | const struct nlattr *bc, |
855 | bool net_admin) | |
1da177e4 | 856 | { |
8d07d151 PE |
857 | if (!inet_diag_bc_sk(bc, sk)) |
858 | return 0; | |
1da177e4 | 859 | |
a029fe26 | 860 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 861 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 862 | NETLINK_CB(cb->skb).portid, |
d545caca LC |
863 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh, |
864 | net_admin); | |
1da177e4 LT |
865 | } |
866 | ||
49612729 ED |
867 | static void twsk_build_assert(void) |
868 | { | |
869 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
870 | offsetof(struct sock, sk_family)); | |
871 | ||
872 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
873 | offsetof(struct inet_sock, inet_num)); | |
874 | ||
875 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
876 | offsetof(struct inet_sock, inet_dport)); | |
877 | ||
878 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
879 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
880 | ||
881 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
882 | offsetof(struct inet_sock, inet_daddr)); | |
883 | ||
884 | #if IS_ENABLED(CONFIG_IPV6) | |
885 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
886 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
887 | ||
888 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
889 | offsetof(struct sock, sk_v6_daddr)); | |
890 | #endif | |
891 | } | |
892 | ||
1942c518 | 893 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
e31c5e0e | 894 | struct netlink_callback *cb, |
34160ea3 | 895 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 | 896 | { |
67db3e4b | 897 | bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN); |
51d7cccf | 898 | struct net *net = sock_net(skb->sk); |
079096f1 | 899 | u32 idiag_states = r->idiag_states; |
67db3e4b ED |
900 | int i, num, s_i, s_num; |
901 | struct sock *sk; | |
4e852c02 | 902 | |
079096f1 ED |
903 | if (idiag_states & TCPF_SYN_RECV) |
904 | idiag_states |= TCPF_NEW_SYN_RECV; | |
1da177e4 LT |
905 | s_i = cb->args[1]; |
906 | s_num = num = cb->args[2]; | |
4f5736c4 | 907 | |
1da177e4 | 908 | if (cb->args[0] == 0) { |
9652dc2e | 909 | if (!(idiag_states & TCPF_LISTEN) || r->id.idiag_dport) |
1da177e4 | 910 | goto skip_listen_ht; |
540722ff | 911 | |
0f7ff927 | 912 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 913 | struct inet_listen_hashbucket *ilb; |
6cb8e266 | 914 | struct hlist_nulls_node *node; |
1da177e4 LT |
915 | |
916 | num = 0; | |
5caea4ea | 917 | ilb = &hashinfo->listening_hash[i]; |
9652dc2e | 918 | spin_lock(&ilb->lock); |
6cb8e266 | 919 | sk_nulls_for_each(sk, node, &ilb->nulls_head) { |
1da177e4 LT |
920 | struct inet_sock *inet = inet_sk(sk); |
921 | ||
51d7cccf AV |
922 | if (!net_eq(sock_net(sk), net)) |
923 | continue; | |
924 | ||
1da177e4 LT |
925 | if (num < s_num) { |
926 | num++; | |
927 | continue; | |
928 | } | |
929 | ||
d23deaa0 | 930 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 931 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
932 | goto next_listen; |
933 | ||
c720c7e8 | 934 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 935 | r->id.idiag_sport) |
1da177e4 LT |
936 | goto next_listen; |
937 | ||
d545caca LC |
938 | if (inet_csk_diag_dump(sk, skb, cb, r, |
939 | bc, net_admin) < 0) { | |
9652dc2e | 940 | spin_unlock(&ilb->lock); |
1da177e4 LT |
941 | goto done; |
942 | } | |
943 | ||
944 | next_listen: | |
1da177e4 LT |
945 | ++num; |
946 | } | |
9652dc2e | 947 | spin_unlock(&ilb->lock); |
1da177e4 LT |
948 | |
949 | s_num = 0; | |
1da177e4 | 950 | } |
1da177e4 LT |
951 | skip_listen_ht: |
952 | cb->args[0] = 1; | |
953 | s_i = num = s_num = 0; | |
954 | } | |
955 | ||
079096f1 | 956 | if (!(idiag_states & ~TCPF_LISTEN)) |
efb3cb42 | 957 | goto out; |
1da177e4 | 958 | |
67db3e4b | 959 | #define SKARR_SZ 16 |
f373b53b | 960 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 961 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 962 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 963 | struct hlist_nulls_node *node; |
67db3e4b ED |
964 | struct sock *sk_arr[SKARR_SZ]; |
965 | int num_arr[SKARR_SZ]; | |
966 | int idx, accum, res; | |
6be547a6 | 967 | |
05dbc7b5 | 968 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
969 | continue; |
970 | ||
1da177e4 LT |
971 | if (i > s_i) |
972 | s_num = 0; | |
973 | ||
67db3e4b ED |
974 | next_chunk: |
975 | num = 0; | |
976 | accum = 0; | |
7e3aab4a | 977 | spin_lock_bh(lock); |
3ab5aee7 | 978 | sk_nulls_for_each(sk, node, &head->chain) { |
67db3e4b | 979 | int state; |
1da177e4 | 980 | |
51d7cccf AV |
981 | if (!net_eq(sock_net(sk), net)) |
982 | continue; | |
1da177e4 LT |
983 | if (num < s_num) |
984 | goto next_normal; | |
70315d22 NC |
985 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
986 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
079096f1 | 987 | if (!(idiag_states & (1 << state))) |
1da177e4 | 988 | goto next_normal; |
d23deaa0 | 989 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 990 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 991 | goto next_normal; |
05dbc7b5 | 992 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 993 | r->id.idiag_sport) |
1da177e4 | 994 | goto next_normal; |
05dbc7b5 | 995 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 996 | r->id.idiag_dport) |
1da177e4 | 997 | goto next_normal; |
a58917f5 ED |
998 | twsk_build_assert(); |
999 | ||
1000 | if (!inet_diag_bc_sk(bc, sk)) | |
1001 | goto next_normal; | |
1002 | ||
d118c401 ED |
1003 | if (!refcount_inc_not_zero(&sk->sk_refcnt)) |
1004 | goto next_normal; | |
1005 | ||
67db3e4b ED |
1006 | num_arr[accum] = num; |
1007 | sk_arr[accum] = sk; | |
1008 | if (++accum == SKARR_SZ) | |
1009 | break; | |
1010 | next_normal: | |
1011 | ++num; | |
1012 | } | |
1013 | spin_unlock_bh(lock); | |
1014 | res = 0; | |
1015 | for (idx = 0; idx < accum; idx++) { | |
1016 | if (res >= 0) { | |
1017 | res = sk_diag_fill(sk_arr[idx], skb, r, | |
a58917f5 ED |
1018 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
1019 | NETLINK_CB(cb->skb).portid, | |
1020 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
d545caca | 1021 | cb->nlh, net_admin); |
67db3e4b ED |
1022 | if (res < 0) |
1023 | num = num_arr[idx]; | |
1da177e4 | 1024 | } |
67db3e4b | 1025 | sock_gen_put(sk_arr[idx]); |
1da177e4 | 1026 | } |
67db3e4b ED |
1027 | if (res < 0) |
1028 | break; | |
acffb584 | 1029 | cond_resched(); |
67db3e4b ED |
1030 | if (accum == SKARR_SZ) { |
1031 | s_num = num + 1; | |
1032 | goto next_chunk; | |
1033 | } | |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | done: | |
1037 | cb->args[1] = i; | |
1038 | cb->args[2] = num; | |
efb3cb42 PE |
1039 | out: |
1040 | ; | |
1041 | } | |
1942c518 | 1042 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
1043 | |
1044 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
34160ea3 | 1045 | const struct inet_diag_req_v2 *r, |
e31c5e0e | 1046 | struct nlattr *bc) |
efb3cb42 PE |
1047 | { |
1048 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 1049 | int err = 0; |
efb3cb42 PE |
1050 | |
1051 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
1052 | if (!IS_ERR(handler)) | |
1942c518 | 1053 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
1054 | else |
1055 | err = PTR_ERR(handler); | |
d523a328 | 1056 | inet_diag_unlock_handler(handler); |
efb3cb42 | 1057 | |
cacb6ba0 | 1058 | return err ? : skb->len; |
1da177e4 LT |
1059 | } |
1060 | ||
25c4cd2b PE |
1061 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1062 | { | |
c8991362 | 1063 | int hdrlen = sizeof(struct inet_diag_req_v2); |
e31c5e0e | 1064 | struct nlattr *bc = NULL; |
25c4cd2b PE |
1065 | |
1066 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1067 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1068 | ||
d106352d | 1069 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
1070 | } |
1071 | ||
e31c5e0e | 1072 | static int inet_diag_type2proto(int type) |
a029fe26 PE |
1073 | { |
1074 | switch (type) { | |
1075 | case TCPDIAG_GETSOCK: | |
1076 | return IPPROTO_TCP; | |
1077 | case DCCPDIAG_GETSOCK: | |
1078 | return IPPROTO_DCCP; | |
1079 | default: | |
1080 | return 0; | |
1081 | } | |
1082 | } | |
1083 | ||
e31c5e0e ED |
1084 | static int inet_diag_dump_compat(struct sk_buff *skb, |
1085 | struct netlink_callback *cb) | |
25c4cd2b | 1086 | { |
d106352d | 1087 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
e31c5e0e | 1088 | int hdrlen = sizeof(struct inet_diag_req); |
c8991362 | 1089 | struct inet_diag_req_v2 req; |
25c4cd2b | 1090 | struct nlattr *bc = NULL; |
25c4cd2b | 1091 | |
d23deaa0 | 1092 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
1093 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
1094 | req.idiag_ext = rc->idiag_ext; | |
1095 | req.idiag_states = rc->idiag_states; | |
1096 | req.id = rc->id; | |
1097 | ||
1098 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1099 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1100 | ||
1101 | return __inet_diag_dump(skb, cb, &req, bc); | |
1102 | } | |
1103 | ||
fe50ce28 | 1104 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
e31c5e0e | 1105 | const struct nlmsghdr *nlh) |
fe50ce28 | 1106 | { |
d106352d | 1107 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 1108 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
1109 | |
1110 | req.sdiag_family = rc->idiag_family; | |
1111 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
1112 | req.idiag_ext = rc->idiag_ext; | |
1113 | req.idiag_states = rc->idiag_states; | |
1114 | req.id = rc->id; | |
1115 | ||
6eb5d2e0 | 1116 | return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req); |
fe50ce28 PE |
1117 | } |
1118 | ||
8d34172d | 1119 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1120 | { |
3b09c84c | 1121 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 1122 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1123 | |
ead592ba TG |
1124 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
1125 | nlmsg_len(nlh) < hdrlen) | |
1126 | return -EINVAL; | |
1da177e4 | 1127 | |
b8f3ab42 | 1128 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1129 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1130 | struct nlattr *attr; | |
627cc4ad | 1131 | int err; |
1da177e4 | 1132 | |
ead592ba TG |
1133 | attr = nlmsg_find_attr(nlh, hdrlen, |
1134 | INET_DIAG_REQ_BYTECODE); | |
a52e95ab | 1135 | err = inet_diag_bc_audit(attr, skb); |
627cc4ad LC |
1136 | if (err) |
1137 | return err; | |
ead592ba | 1138 | } |
80d326fa PNA |
1139 | { |
1140 | struct netlink_dump_control c = { | |
1141 | .dump = inet_diag_dump_compat, | |
1142 | }; | |
51d7cccf | 1143 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1144 | } |
1da177e4 | 1145 | } |
ead592ba | 1146 | |
fe50ce28 | 1147 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1148 | } |
1149 | ||
6eb5d2e0 | 1150 | static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h) |
d366477a | 1151 | { |
c8991362 | 1152 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1153 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1154 | |
1155 | if (nlmsg_len(h) < hdrlen) | |
1156 | return -EINVAL; | |
1157 | ||
6eb5d2e0 LC |
1158 | if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY && |
1159 | h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1160 | if (nlmsg_attrlen(h, hdrlen)) { |
1161 | struct nlattr *attr; | |
627cc4ad | 1162 | int err; |
e31c5e0e | 1163 | |
25c4cd2b PE |
1164 | attr = nlmsg_find_attr(h, hdrlen, |
1165 | INET_DIAG_REQ_BYTECODE); | |
a52e95ab | 1166 | err = inet_diag_bc_audit(attr, skb); |
627cc4ad LC |
1167 | if (err) |
1168 | return err; | |
25c4cd2b | 1169 | } |
80d326fa PNA |
1170 | { |
1171 | struct netlink_dump_control c = { | |
1172 | .dump = inet_diag_dump, | |
1173 | }; | |
51d7cccf | 1174 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1175 | } |
d366477a PE |
1176 | } |
1177 | ||
6eb5d2e0 | 1178 | return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h)); |
d366477a PE |
1179 | } |
1180 | ||
35ac838a CG |
1181 | static |
1182 | int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk) | |
1183 | { | |
1184 | const struct inet_diag_handler *handler; | |
1185 | struct nlmsghdr *nlh; | |
1186 | struct nlattr *attr; | |
1187 | struct inet_diag_msg *r; | |
1188 | void *info = NULL; | |
1189 | int err = 0; | |
1190 | ||
1191 | nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0); | |
1192 | if (!nlh) | |
1193 | return -ENOMEM; | |
1194 | ||
1195 | r = nlmsg_data(nlh); | |
1196 | memset(r, 0, sizeof(*r)); | |
1197 | inet_diag_msg_common_fill(r, sk); | |
e0df02e0 CG |
1198 | if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM) |
1199 | r->id.idiag_sport = inet_sk(sk)->inet_sport; | |
35ac838a CG |
1200 | r->idiag_state = sk->sk_state; |
1201 | ||
1202 | if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) { | |
1203 | nlmsg_cancel(skb, nlh); | |
1204 | return err; | |
1205 | } | |
1206 | ||
1207 | handler = inet_diag_lock_handler(sk->sk_protocol); | |
1208 | if (IS_ERR(handler)) { | |
1209 | inet_diag_unlock_handler(handler); | |
1210 | nlmsg_cancel(skb, nlh); | |
1211 | return PTR_ERR(handler); | |
1212 | } | |
1213 | ||
1214 | attr = handler->idiag_info_size | |
6ed46d12 ND |
1215 | ? nla_reserve_64bit(skb, INET_DIAG_INFO, |
1216 | handler->idiag_info_size, | |
1217 | INET_DIAG_PAD) | |
35ac838a CG |
1218 | : NULL; |
1219 | if (attr) | |
1220 | info = nla_data(attr); | |
1221 | ||
1222 | handler->idiag_get_info(sk, r, info); | |
1223 | inet_diag_unlock_handler(handler); | |
1224 | ||
1225 | nlmsg_end(skb, nlh); | |
1226 | return 0; | |
1227 | } | |
1228 | ||
8dcf01fc | 1229 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a | 1230 | .family = AF_INET, |
6eb5d2e0 | 1231 | .dump = inet_diag_handler_cmd, |
35ac838a | 1232 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1233 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1234 | }; |
1235 | ||
8dcf01fc | 1236 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a | 1237 | .family = AF_INET6, |
6eb5d2e0 | 1238 | .dump = inet_diag_handler_cmd, |
35ac838a | 1239 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1240 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1241 | }; |
1242 | ||
4f5736c4 ACM |
1243 | int inet_diag_register(const struct inet_diag_handler *h) |
1244 | { | |
1245 | const __u16 type = h->idiag_type; | |
1246 | int err = -EINVAL; | |
1247 | ||
f13c95f0 | 1248 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1249 | goto out; |
1250 | ||
d523a328 | 1251 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1252 | err = -EEXIST; |
e31c5e0e | 1253 | if (!inet_diag_table[type]) { |
4f5736c4 ACM |
1254 | inet_diag_table[type] = h; |
1255 | err = 0; | |
1256 | } | |
d523a328 | 1257 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1258 | out: |
1259 | return err; | |
1260 | } | |
1261 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1262 | ||
1263 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1264 | { | |
1265 | const __u16 type = h->idiag_type; | |
1266 | ||
f13c95f0 | 1267 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1268 | return; |
1269 | ||
d523a328 | 1270 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1271 | inet_diag_table[type] = NULL; |
d523a328 | 1272 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1273 | } |
1274 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1275 | ||
73c1f4a0 | 1276 | static int __init inet_diag_init(void) |
1da177e4 | 1277 | { |
f13c95f0 | 1278 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1279 | sizeof(struct inet_diag_handler *)); |
1280 | int err = -ENOMEM; | |
1281 | ||
0da974f4 | 1282 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1283 | if (!inet_diag_table) |
1284 | goto out; | |
1285 | ||
d366477a PE |
1286 | err = sock_diag_register(&inet_diag_handler); |
1287 | if (err) | |
1288 | goto out_free_nl; | |
1289 | ||
1290 | err = sock_diag_register(&inet6_diag_handler); | |
1291 | if (err) | |
1292 | goto out_free_inet; | |
1293 | ||
8ef874bf | 1294 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1295 | out: |
1296 | return err; | |
d366477a PE |
1297 | |
1298 | out_free_inet: | |
1299 | sock_diag_unregister(&inet_diag_handler); | |
1300 | out_free_nl: | |
4f5736c4 ACM |
1301 | kfree(inet_diag_table); |
1302 | goto out; | |
1da177e4 LT |
1303 | } |
1304 | ||
73c1f4a0 | 1305 | static void __exit inet_diag_exit(void) |
1da177e4 | 1306 | { |
d366477a PE |
1307 | sock_diag_unregister(&inet6_diag_handler); |
1308 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1309 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1310 | kfree(inet_diag_table); |
1da177e4 LT |
1311 | } |
1312 | ||
73c1f4a0 ACM |
1313 | module_init(inet_diag_init); |
1314 | module_exit(inet_diag_exit); | |
1da177e4 | 1315 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1316 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1317 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |