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