Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
73c1f4a0 | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 3 | * |
1da177e4 LT |
4 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
172589cc | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/random.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/cache.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/time.h> | |
21 | ||
22 | #include <net/icmp.h> | |
23 | #include <net/tcp.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <net/inet_common.h> | |
505cbfc5 ACM |
26 | #include <net/inet_connection_sock.h> |
27 | #include <net/inet_hashtables.h> | |
28 | #include <net/inet_timewait_sock.h> | |
29 | #include <net/inet6_hashtables.h> | |
dc5fc579 | 30 | #include <net/netlink.h> |
1da177e4 LT |
31 | |
32 | #include <linux/inet.h> | |
33 | #include <linux/stddef.h> | |
34 | ||
a8c2190e | 35 | #include <linux/inet_diag.h> |
d366477a | 36 | #include <linux/sock_diag.h> |
1da177e4 | 37 | |
4f5736c4 ACM |
38 | static const struct inet_diag_handler **inet_diag_table; |
39 | ||
73c1f4a0 | 40 | struct inet_diag_entry { |
e31c5e0e ED |
41 | const __be32 *saddr; |
42 | const __be32 *daddr; | |
1da177e4 LT |
43 | u16 sport; |
44 | u16 dport; | |
45 | u16 family; | |
46 | u16 userlocks; | |
47 | }; | |
48 | ||
d523a328 HX |
49 | static DEFINE_MUTEX(inet_diag_table_mutex); |
50 | ||
f13c95f0 | 51 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 52 | { |
f13c95f0 | 53 | if (!inet_diag_table[proto]) |
aec8dc62 PE |
54 | request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK, |
55 | NETLINK_SOCK_DIAG, AF_INET, proto); | |
d523a328 HX |
56 | |
57 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 58 | if (!inet_diag_table[proto]) |
d523a328 HX |
59 | return ERR_PTR(-ENOENT); |
60 | ||
f13c95f0 | 61 | return inet_diag_table[proto]; |
d523a328 HX |
62 | } |
63 | ||
e31c5e0e | 64 | static void inet_diag_unlock_handler(const struct inet_diag_handler *handler) |
d523a328 HX |
65 | { |
66 | mutex_unlock(&inet_diag_table_mutex); | |
67 | } | |
68 | ||
cb2050a7 | 69 | void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) |
a4458343 ED |
70 | { |
71 | r->idiag_family = sk->sk_family; | |
72 | ||
73 | r->id.idiag_sport = htons(sk->sk_num); | |
74 | r->id.idiag_dport = sk->sk_dport; | |
75 | r->id.idiag_if = sk->sk_bound_dev_if; | |
76 | sock_diag_save_cookie(sk, r->id.idiag_cookie); | |
77 | ||
78 | #if IS_ENABLED(CONFIG_IPV6) | |
79 | if (sk->sk_family == AF_INET6) { | |
80 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; | |
81 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; | |
82 | } else | |
83 | #endif | |
84 | { | |
85 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
86 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
87 | ||
88 | r->id.idiag_src[0] = sk->sk_rcv_saddr; | |
89 | r->id.idiag_dst[0] = sk->sk_daddr; | |
90 | } | |
91 | } | |
cb2050a7 | 92 | EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill); |
a4458343 | 93 | |
c8e2c80d ED |
94 | static size_t inet_sk_attr_size(void) |
95 | { | |
96 | return nla_total_size(sizeof(struct tcp_info)) | |
97 | + nla_total_size(1) /* INET_DIAG_SHUTDOWN */ | |
98 | + nla_total_size(1) /* INET_DIAG_TOS */ | |
99 | + nla_total_size(1) /* INET_DIAG_TCLASS */ | |
100 | + nla_total_size(sizeof(struct inet_diag_meminfo)) | |
101 | + nla_total_size(sizeof(struct inet_diag_msg)) | |
102 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) | |
103 | + nla_total_size(TCP_CA_NAME_MAX) | |
104 | + nla_total_size(sizeof(struct tcpvegas_info)) | |
105 | + 64; | |
106 | } | |
107 | ||
cb2050a7 XL |
108 | int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb, |
109 | struct inet_diag_msg *r, int ext, | |
110 | struct user_namespace *user_ns) | |
111 | { | |
112 | const struct inet_sock *inet = inet_sk(sk); | |
113 | ||
114 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) | |
115 | goto errout; | |
116 | ||
117 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, | |
118 | * hence this needs to be included regardless of socket family. | |
119 | */ | |
120 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
121 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) | |
122 | goto errout; | |
123 | ||
124 | #if IS_ENABLED(CONFIG_IPV6) | |
125 | if (r->idiag_family == AF_INET6) { | |
126 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) | |
127 | if (nla_put_u8(skb, INET_DIAG_TCLASS, | |
128 | inet6_sk(sk)->tclass) < 0) | |
129 | goto errout; | |
130 | ||
131 | if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
132 | nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk))) | |
133 | goto errout; | |
134 | } | |
135 | #endif | |
136 | ||
137 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); | |
138 | r->idiag_inode = sock_i_ino(sk); | |
139 | ||
140 | return 0; | |
141 | errout: | |
142 | return 1; | |
143 | } | |
144 | EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill); | |
145 | ||
3c4d05c8 | 146 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 147 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
148 | struct user_namespace *user_ns, |
149 | u32 portid, u32 seq, u16 nlmsg_flags, | |
150 | const struct nlmsghdr *unlh) | |
1da177e4 | 151 | { |
521f1cf1 | 152 | const struct tcp_congestion_ops *ca_ops; |
e31c5e0e ED |
153 | const struct inet_diag_handler *handler; |
154 | int ext = req->idiag_ext; | |
73c1f4a0 | 155 | struct inet_diag_msg *r; |
1da177e4 | 156 | struct nlmsghdr *nlh; |
6e277ed5 | 157 | struct nlattr *attr; |
4f5736c4 | 158 | void *info = NULL; |
4f5736c4 | 159 | |
a029fe26 | 160 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 161 | BUG_ON(!handler); |
1da177e4 | 162 | |
15e47304 | 163 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
164 | nlmsg_flags); |
165 | if (!nlh) | |
d106352d | 166 | return -EMSGSIZE; |
4f5736c4 | 167 | |
d106352d | 168 | r = nlmsg_data(nlh); |
a58917f5 | 169 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 170 | |
a4458343 | 171 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
172 | r->idiag_state = sk->sk_state; |
173 | r->idiag_timer = 0; | |
174 | r->idiag_retrans = 0; | |
1da177e4 | 175 | |
cb2050a7 | 176 | if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns)) |
e4e541a8 PE |
177 | goto errout; |
178 | ||
6e277ed5 TG |
179 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
180 | struct inet_diag_meminfo minfo = { | |
181 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
182 | .idiag_wmem = sk->sk_wmem_queued, | |
183 | .idiag_fmem = sk->sk_forward_alloc, | |
184 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
185 | }; | |
186 | ||
187 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
188 | goto errout; | |
3c4d05c8 PE |
189 | } |
190 | ||
c0636faa PE |
191 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
192 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 193 | goto errout; |
c0636faa | 194 | |
e31c5e0e | 195 | if (!icsk) { |
62ad6fcd | 196 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
197 | goto out; |
198 | } | |
199 | ||
6ba8a3b1 ND |
200 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
201 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || | |
202 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { | |
73c1f4a0 ACM |
203 | r->idiag_timer = 1; |
204 | r->idiag_retrans = icsk->icsk_retransmits; | |
b7de529c XL |
205 | r->idiag_expires = |
206 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
463c84b9 | 207 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
208 | r->idiag_timer = 4; |
209 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
210 | r->idiag_expires = |
211 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
1da177e4 | 212 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
213 | r->idiag_timer = 2; |
214 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
215 | r->idiag_expires = |
216 | jiffies_to_msecs(sk->sk_timer.expires - jiffies); | |
1da177e4 | 217 | } else { |
73c1f4a0 ACM |
218 | r->idiag_timer = 0; |
219 | r->idiag_expires = 0; | |
1da177e4 | 220 | } |
540722ff | 221 | |
3fd22af8 | 222 | if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { |
6ed46d12 ND |
223 | attr = nla_reserve_64bit(skb, INET_DIAG_INFO, |
224 | handler->idiag_info_size, | |
225 | INET_DIAG_PAD); | |
6e277ed5 TG |
226 | if (!attr) |
227 | goto errout; | |
3c4d05c8 | 228 | |
6e277ed5 | 229 | info = nla_data(attr); |
1da177e4 LT |
230 | } |
231 | ||
521f1cf1 ED |
232 | if (ext & (1 << (INET_DIAG_CONG - 1))) { |
233 | int err = 0; | |
234 | ||
235 | rcu_read_lock(); | |
236 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
237 | if (ca_ops) | |
238 | err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); | |
239 | rcu_read_unlock(); | |
240 | if (err < 0) | |
6e277ed5 | 241 | goto errout; |
521f1cf1 | 242 | } |
6e277ed5 | 243 | |
4f5736c4 | 244 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 245 | |
521f1cf1 | 246 | if (sk->sk_state < TCP_TIME_WAIT) { |
64f40ff5 ED |
247 | union tcp_cc_info info; |
248 | size_t sz = 0; | |
249 | int attr; | |
521f1cf1 ED |
250 | |
251 | rcu_read_lock(); | |
252 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
253 | if (ca_ops && ca_ops->get_info) | |
64f40ff5 | 254 | sz = ca_ops->get_info(sk, ext, &attr, &info); |
521f1cf1 | 255 | rcu_read_unlock(); |
64f40ff5 | 256 | if (sz && nla_put(skb, attr, sz, &info) < 0) |
521f1cf1 ED |
257 | goto errout; |
258 | } | |
1da177e4 | 259 | |
3c4d05c8 | 260 | out: |
053c095a JB |
261 | nlmsg_end(skb, nlh); |
262 | return 0; | |
1da177e4 | 263 | |
6e277ed5 TG |
264 | errout: |
265 | nlmsg_cancel(skb, nlh); | |
26932566 | 266 | return -EMSGSIZE; |
1da177e4 | 267 | } |
3c4d05c8 PE |
268 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
269 | ||
270 | static int inet_csk_diag_fill(struct sock *sk, | |
e31c5e0e | 271 | struct sk_buff *skb, |
34160ea3 | 272 | const struct inet_diag_req_v2 *req, |
d06ca956 | 273 | struct user_namespace *user_ns, |
15e47304 | 274 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
275 | const struct nlmsghdr *unlh) |
276 | { | |
e31c5e0e ED |
277 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, |
278 | user_ns, portid, seq, nlmsg_flags, unlh); | |
3c4d05c8 | 279 | } |
1da177e4 | 280 | |
33cf7c90 | 281 | static int inet_twsk_diag_fill(struct sock *sk, |
e31c5e0e | 282 | struct sk_buff *skb, |
15e47304 | 283 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
284 | const struct nlmsghdr *unlh) |
285 | { | |
33cf7c90 | 286 | struct inet_timewait_sock *tw = inet_twsk(sk); |
c7d58aab | 287 | struct inet_diag_msg *r; |
6e277ed5 | 288 | struct nlmsghdr *nlh; |
789f558c | 289 | long tmo; |
d106352d | 290 | |
15e47304 | 291 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
292 | nlmsg_flags); |
293 | if (!nlh) | |
d106352d | 294 | return -EMSGSIZE; |
c7d58aab | 295 | |
d106352d | 296 | r = nlmsg_data(nlh); |
c7d58aab ACM |
297 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
298 | ||
789f558c | 299 | tmo = tw->tw_timer.expires - jiffies; |
c7d58aab ACM |
300 | if (tmo < 0) |
301 | tmo = 0; | |
302 | ||
a4458343 | 303 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 304 | r->idiag_retrans = 0; |
b1aac815 | 305 | |
c7d58aab ACM |
306 | r->idiag_state = tw->tw_substate; |
307 | r->idiag_timer = 3; | |
96f817fe | 308 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
309 | r->idiag_rqueue = 0; |
310 | r->idiag_wqueue = 0; | |
311 | r->idiag_uid = 0; | |
312 | r->idiag_inode = 0; | |
6e277ed5 | 313 | |
053c095a JB |
314 | nlmsg_end(skb, nlh); |
315 | return 0; | |
c7d58aab ACM |
316 | } |
317 | ||
a58917f5 ED |
318 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
319 | u32 portid, u32 seq, u16 nlmsg_flags, | |
320 | const struct nlmsghdr *unlh) | |
321 | { | |
322 | struct inet_diag_msg *r; | |
323 | struct nlmsghdr *nlh; | |
324 | long tmo; | |
325 | ||
326 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
327 | nlmsg_flags); | |
328 | if (!nlh) | |
329 | return -EMSGSIZE; | |
330 | ||
331 | r = nlmsg_data(nlh); | |
332 | inet_diag_msg_common_fill(r, sk); | |
333 | r->idiag_state = TCP_SYN_RECV; | |
334 | r->idiag_timer = 1; | |
335 | r->idiag_retrans = inet_reqsk(sk)->num_retrans; | |
336 | ||
337 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
338 | offsetof(struct sock, sk_cookie)); | |
339 | ||
fa76ce73 | 340 | tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; |
a58917f5 ED |
341 | r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0; |
342 | r->idiag_rqueue = 0; | |
343 | r->idiag_wqueue = 0; | |
344 | r->idiag_uid = 0; | |
345 | r->idiag_inode = 0; | |
346 | ||
347 | nlmsg_end(skb, nlh); | |
348 | return 0; | |
349 | } | |
350 | ||
dff2c035 | 351 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 352 | const struct inet_diag_req_v2 *r, |
d06ca956 | 353 | struct user_namespace *user_ns, |
15e47304 | 354 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
355 | const struct nlmsghdr *unlh) |
356 | { | |
357 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 358 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
359 | nlmsg_flags, unlh); |
360 | ||
a58917f5 ED |
361 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
362 | return inet_req_diag_fill(sk, skb, portid, seq, | |
363 | nlmsg_flags, unlh); | |
364 | ||
efe4208f ED |
365 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
366 | nlmsg_flags, unlh); | |
dff2c035 ACM |
367 | } |
368 | ||
b613f56e LC |
369 | struct sock *inet_diag_find_one_icsk(struct net *net, |
370 | struct inet_hashinfo *hashinfo, | |
371 | const struct inet_diag_req_v2 *req) | |
1da177e4 | 372 | { |
e31c5e0e | 373 | struct sock *sk; |
d523a328 | 374 | |
2d331915 | 375 | rcu_read_lock(); |
e31c5e0e | 376 | if (req->sdiag_family == AF_INET) |
a583636a | 377 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0], |
73c1f4a0 ACM |
378 | req->id.idiag_dport, req->id.idiag_src[0], |
379 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 380 | #if IS_ENABLED(CONFIG_IPV6) |
7c130672 ED |
381 | else if (req->sdiag_family == AF_INET6) { |
382 | if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) && | |
383 | ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src)) | |
a583636a | 384 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3], |
7c130672 ED |
385 | req->id.idiag_dport, req->id.idiag_src[3], |
386 | req->id.idiag_sport, req->id.idiag_if); | |
387 | else | |
a583636a | 388 | sk = inet6_lookup(net, hashinfo, NULL, 0, |
7c130672 ED |
389 | (struct in6_addr *)req->id.idiag_dst, |
390 | req->id.idiag_dport, | |
391 | (struct in6_addr *)req->id.idiag_src, | |
392 | req->id.idiag_sport, | |
393 | req->id.idiag_if); | |
394 | } | |
1da177e4 | 395 | #endif |
2d331915 ED |
396 | else { |
397 | rcu_read_unlock(); | |
b613f56e | 398 | return ERR_PTR(-EINVAL); |
2d331915 ED |
399 | } |
400 | rcu_read_unlock(); | |
e31c5e0e | 401 | if (!sk) |
b613f56e | 402 | return ERR_PTR(-ENOENT); |
1da177e4 | 403 | |
b613f56e LC |
404 | if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) { |
405 | sock_gen_put(sk); | |
406 | return ERR_PTR(-ENOENT); | |
407 | } | |
408 | ||
409 | return sk; | |
410 | } | |
411 | EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk); | |
412 | ||
413 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, | |
414 | struct sk_buff *in_skb, | |
415 | const struct nlmsghdr *nlh, | |
416 | const struct inet_diag_req_v2 *req) | |
417 | { | |
418 | struct net *net = sock_net(in_skb->sk); | |
419 | struct sk_buff *rep; | |
420 | struct sock *sk; | |
421 | int err; | |
422 | ||
423 | sk = inet_diag_find_one_icsk(net, hashinfo, req); | |
424 | if (IS_ERR(sk)) | |
425 | return PTR_ERR(sk); | |
1da177e4 | 426 | |
c8e2c80d | 427 | rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL); |
6e277ed5 TG |
428 | if (!rep) { |
429 | err = -ENOMEM; | |
1da177e4 | 430 | goto out; |
6e277ed5 | 431 | } |
1da177e4 | 432 | |
a029fe26 | 433 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 434 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 435 | NETLINK_CB(in_skb).portid, |
26932566 PM |
436 | nlh->nlmsg_seq, 0, nlh); |
437 | if (err < 0) { | |
438 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 439 | nlmsg_free(rep); |
26932566 PM |
440 | goto out; |
441 | } | |
15e47304 | 442 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 443 | MSG_DONTWAIT); |
1da177e4 LT |
444 | if (err > 0) |
445 | err = 0; | |
446 | ||
447 | out: | |
c1d607cc ED |
448 | if (sk) |
449 | sock_gen_put(sk); | |
450 | ||
476f7dbf PE |
451 | return err; |
452 | } | |
1942c518 | 453 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf | 454 | |
6eb5d2e0 | 455 | static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb, |
476f7dbf | 456 | const struct nlmsghdr *nlh, |
34160ea3 | 457 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
458 | { |
459 | const struct inet_diag_handler *handler; | |
460 | int err; | |
461 | ||
462 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
463 | if (IS_ERR(handler)) | |
464 | err = PTR_ERR(handler); | |
6eb5d2e0 | 465 | else if (cmd == SOCK_DIAG_BY_FAMILY) |
1942c518 | 466 | err = handler->dump_one(in_skb, nlh, req); |
6eb5d2e0 LC |
467 | else if (cmd == SOCK_DESTROY && handler->destroy) |
468 | err = handler->destroy(in_skb, req); | |
469 | else | |
470 | err = -EOPNOTSUPP; | |
d523a328 | 471 | inet_diag_unlock_handler(handler); |
476f7dbf | 472 | |
1da177e4 LT |
473 | return err; |
474 | } | |
475 | ||
9f855299 | 476 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
477 | { |
478 | int words = bits >> 5; | |
479 | ||
480 | bits &= 0x1f; | |
481 | ||
482 | if (words) { | |
483 | if (memcmp(a1, a2, words << 2)) | |
484 | return 0; | |
485 | } | |
486 | if (bits) { | |
9f855299 AV |
487 | __be32 w1, w2; |
488 | __be32 mask; | |
1da177e4 LT |
489 | |
490 | w1 = a1[words]; | |
491 | w2 = a2[words]; | |
492 | ||
493 | mask = htonl((0xffffffff) << (32 - bits)); | |
494 | ||
495 | if ((w1 ^ w2) & mask) | |
496 | return 0; | |
497 | } | |
498 | ||
499 | return 1; | |
500 | } | |
501 | ||
87c22ea5 | 502 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 503 | const struct inet_diag_entry *entry) |
1da177e4 | 504 | { |
87c22ea5 PE |
505 | const void *bc = nla_data(_bc); |
506 | int len = nla_len(_bc); | |
507 | ||
1da177e4 LT |
508 | while (len > 0) { |
509 | int yes = 1; | |
73c1f4a0 | 510 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
511 | |
512 | switch (op->code) { | |
73c1f4a0 | 513 | case INET_DIAG_BC_NOP: |
1da177e4 | 514 | break; |
73c1f4a0 | 515 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
516 | yes = 0; |
517 | break; | |
73c1f4a0 | 518 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
519 | yes = entry->sport >= op[1].no; |
520 | break; | |
73c1f4a0 | 521 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 522 | yes = entry->sport <= op[1].no; |
1da177e4 | 523 | break; |
73c1f4a0 | 524 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
525 | yes = entry->dport >= op[1].no; |
526 | break; | |
73c1f4a0 | 527 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
528 | yes = entry->dport <= op[1].no; |
529 | break; | |
73c1f4a0 | 530 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
531 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
532 | break; | |
73c1f4a0 | 533 | case INET_DIAG_BC_S_COND: |
a8c2190e | 534 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
535 | const struct inet_diag_hostcond *cond; |
536 | const __be32 *addr; | |
1da177e4 | 537 | |
e31c5e0e | 538 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 539 | if (cond->port != -1 && |
73c1f4a0 | 540 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
541 | entry->sport : entry->dport)) { |
542 | yes = 0; | |
543 | break; | |
544 | } | |
4e852c02 | 545 | |
73c1f4a0 | 546 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
547 | addr = entry->saddr; |
548 | else | |
549 | addr = entry->daddr; | |
550 | ||
f67caec9 NC |
551 | if (cond->family != AF_UNSPEC && |
552 | cond->family != entry->family) { | |
553 | if (entry->family == AF_INET6 && | |
554 | cond->family == AF_INET) { | |
555 | if (addr[0] == 0 && addr[1] == 0 && | |
556 | addr[2] == htonl(0xffff) && | |
557 | bitstring_match(addr + 3, | |
558 | cond->addr, | |
559 | cond->prefix_len)) | |
560 | break; | |
561 | } | |
562 | yes = 0; | |
563 | break; | |
564 | } | |
565 | ||
566 | if (cond->prefix_len == 0) | |
567 | break; | |
4e852c02 ACM |
568 | if (bitstring_match(addr, cond->addr, |
569 | cond->prefix_len)) | |
1da177e4 | 570 | break; |
1da177e4 LT |
571 | yes = 0; |
572 | break; | |
573 | } | |
574 | } | |
575 | ||
4e852c02 | 576 | if (yes) { |
1da177e4 LT |
577 | len -= op->yes; |
578 | bc += op->yes; | |
579 | } else { | |
580 | len -= op->no; | |
581 | bc += op->no; | |
582 | } | |
583 | } | |
a02cec21 | 584 | return len == 0; |
1da177e4 LT |
585 | } |
586 | ||
a4458343 ED |
587 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
588 | */ | |
589 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
590 | const struct sock *sk) | |
591 | { | |
592 | #if IS_ENABLED(CONFIG_IPV6) | |
593 | if (sk->sk_family == AF_INET6) { | |
594 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
595 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
596 | } else | |
597 | #endif | |
598 | { | |
599 | entry->saddr = &sk->sk_rcv_saddr; | |
600 | entry->daddr = &sk->sk_daddr; | |
601 | } | |
602 | } | |
603 | ||
8d07d151 PE |
604 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
605 | { | |
8d07d151 | 606 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 607 | struct inet_diag_entry entry; |
8d07d151 | 608 | |
e31c5e0e | 609 | if (!bc) |
8d07d151 PE |
610 | return 1; |
611 | ||
612 | entry.family = sk->sk_family; | |
a4458343 | 613 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
614 | entry.sport = inet->inet_num; |
615 | entry.dport = ntohs(inet->inet_dport); | |
a58917f5 | 616 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
8d07d151 PE |
617 | |
618 | return inet_diag_bc_run(bc, &entry); | |
619 | } | |
620 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
621 | ||
1da177e4 LT |
622 | static int valid_cc(const void *bc, int len, int cc) |
623 | { | |
624 | while (len >= 0) { | |
73c1f4a0 | 625 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
626 | |
627 | if (cc > len) | |
628 | return 0; | |
629 | if (cc == len) | |
630 | return 1; | |
eeb14972 | 631 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
632 | return 0; |
633 | len -= op->yes; | |
634 | bc += op->yes; | |
635 | } | |
636 | return 0; | |
637 | } | |
638 | ||
405c0059 NC |
639 | /* Validate an inet_diag_hostcond. */ |
640 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
641 | int *min_len) | |
642 | { | |
405c0059 | 643 | struct inet_diag_hostcond *cond; |
e31c5e0e | 644 | int addr_len; |
405c0059 NC |
645 | |
646 | /* Check hostcond space. */ | |
647 | *min_len += sizeof(struct inet_diag_hostcond); | |
648 | if (len < *min_len) | |
649 | return false; | |
650 | cond = (struct inet_diag_hostcond *)(op + 1); | |
651 | ||
652 | /* Check address family and address length. */ | |
653 | switch (cond->family) { | |
654 | case AF_UNSPEC: | |
655 | addr_len = 0; | |
656 | break; | |
657 | case AF_INET: | |
658 | addr_len = sizeof(struct in_addr); | |
659 | break; | |
660 | case AF_INET6: | |
661 | addr_len = sizeof(struct in6_addr); | |
662 | break; | |
663 | default: | |
664 | return false; | |
665 | } | |
666 | *min_len += addr_len; | |
667 | if (len < *min_len) | |
668 | return false; | |
669 | ||
670 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
671 | if (cond->prefix_len > 8 * addr_len) | |
672 | return false; | |
673 | ||
674 | return true; | |
675 | } | |
676 | ||
5e1f5420 | 677 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
678 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
679 | int len, int *min_len) | |
5e1f5420 NC |
680 | { |
681 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
682 | *min_len += sizeof(struct inet_diag_bc_op); | |
683 | if (len < *min_len) | |
684 | return false; | |
685 | return true; | |
686 | } | |
687 | ||
73c1f4a0 | 688 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 689 | { |
eeb14972 | 690 | const void *bc = bytecode; |
1da177e4 LT |
691 | int len = bytecode_len; |
692 | ||
693 | while (len > 0) { | |
405c0059 | 694 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 695 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 696 | |
1da177e4 | 697 | switch (op->code) { |
73c1f4a0 ACM |
698 | case INET_DIAG_BC_S_COND: |
699 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
700 | if (!valid_hostcond(bc, len, &min_len)) |
701 | return -EINVAL; | |
5e1f5420 | 702 | break; |
73c1f4a0 ACM |
703 | case INET_DIAG_BC_S_GE: |
704 | case INET_DIAG_BC_S_LE: | |
705 | case INET_DIAG_BC_D_GE: | |
706 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 707 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
708 | return -EINVAL; |
709 | break; | |
5e1f5420 NC |
710 | case INET_DIAG_BC_AUTO: |
711 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 712 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
713 | break; |
714 | default: | |
715 | return -EINVAL; | |
716 | } | |
5e1f5420 NC |
717 | |
718 | if (op->code != INET_DIAG_BC_NOP) { | |
719 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
720 | return -EINVAL; | |
721 | if (op->no < len && | |
722 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
723 | return -EINVAL; | |
724 | } | |
725 | ||
405c0059 | 726 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 727 | return -EINVAL; |
4e852c02 | 728 | bc += op->yes; |
1da177e4 LT |
729 | len -= op->yes; |
730 | } | |
731 | return len == 0 ? 0 : -EINVAL; | |
732 | } | |
733 | ||
dff2c035 ACM |
734 | static int inet_csk_diag_dump(struct sock *sk, |
735 | struct sk_buff *skb, | |
37f352b5 | 736 | struct netlink_callback *cb, |
34160ea3 | 737 | const struct inet_diag_req_v2 *r, |
37f352b5 | 738 | const struct nlattr *bc) |
1da177e4 | 739 | { |
8d07d151 PE |
740 | if (!inet_diag_bc_sk(bc, sk)) |
741 | return 0; | |
1da177e4 | 742 | |
a029fe26 | 743 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 744 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 745 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 746 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
747 | } |
748 | ||
49612729 ED |
749 | static void twsk_build_assert(void) |
750 | { | |
751 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
752 | offsetof(struct sock, sk_family)); | |
753 | ||
754 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
755 | offsetof(struct inet_sock, inet_num)); | |
756 | ||
757 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
758 | offsetof(struct inet_sock, inet_dport)); | |
759 | ||
760 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
761 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
762 | ||
763 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
764 | offsetof(struct inet_sock, inet_daddr)); | |
765 | ||
766 | #if IS_ENABLED(CONFIG_IPV6) | |
767 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
768 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
769 | ||
770 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
771 | offsetof(struct sock, sk_v6_daddr)); | |
772 | #endif | |
773 | } | |
774 | ||
1942c518 | 775 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
e31c5e0e | 776 | struct netlink_callback *cb, |
34160ea3 | 777 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 | 778 | { |
51d7cccf | 779 | struct net *net = sock_net(skb->sk); |
e31c5e0e | 780 | int i, num, s_i, s_num; |
079096f1 | 781 | u32 idiag_states = r->idiag_states; |
4e852c02 | 782 | |
079096f1 ED |
783 | if (idiag_states & TCPF_SYN_RECV) |
784 | idiag_states |= TCPF_NEW_SYN_RECV; | |
1da177e4 LT |
785 | s_i = cb->args[1]; |
786 | s_num = num = cb->args[2]; | |
4f5736c4 | 787 | |
1da177e4 | 788 | if (cb->args[0] == 0) { |
079096f1 | 789 | if (!(idiag_states & TCPF_LISTEN)) |
1da177e4 | 790 | goto skip_listen_ht; |
540722ff | 791 | |
0f7ff927 | 792 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 793 | struct inet_listen_hashbucket *ilb; |
e31c5e0e | 794 | struct sock *sk; |
1da177e4 LT |
795 | |
796 | num = 0; | |
5caea4ea ED |
797 | ilb = &hashinfo->listening_hash[i]; |
798 | spin_lock_bh(&ilb->lock); | |
3b24d854 | 799 | sk_for_each(sk, &ilb->head) { |
1da177e4 LT |
800 | struct inet_sock *inet = inet_sk(sk); |
801 | ||
51d7cccf AV |
802 | if (!net_eq(sock_net(sk), net)) |
803 | continue; | |
804 | ||
1da177e4 LT |
805 | if (num < s_num) { |
806 | num++; | |
807 | continue; | |
808 | } | |
809 | ||
d23deaa0 | 810 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 811 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
812 | goto next_listen; |
813 | ||
c720c7e8 | 814 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 815 | r->id.idiag_sport) |
1da177e4 LT |
816 | goto next_listen; |
817 | ||
079096f1 | 818 | if (r->id.idiag_dport || |
1da177e4 | 819 | cb->args[3] > 0) |
1da177e4 LT |
820 | goto next_listen; |
821 | ||
079096f1 | 822 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 823 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
824 | goto done; |
825 | } | |
826 | ||
827 | next_listen: | |
828 | cb->args[3] = 0; | |
829 | cb->args[4] = 0; | |
830 | ++num; | |
831 | } | |
5caea4ea | 832 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
833 | |
834 | s_num = 0; | |
835 | cb->args[3] = 0; | |
836 | cb->args[4] = 0; | |
837 | } | |
1da177e4 LT |
838 | skip_listen_ht: |
839 | cb->args[0] = 1; | |
840 | s_i = num = s_num = 0; | |
841 | } | |
842 | ||
079096f1 | 843 | if (!(idiag_states & ~TCPF_LISTEN)) |
efb3cb42 | 844 | goto out; |
1da177e4 | 845 | |
f373b53b | 846 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 847 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 848 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 849 | struct hlist_nulls_node *node; |
e31c5e0e | 850 | struct sock *sk; |
1da177e4 | 851 | |
6be547a6 AK |
852 | num = 0; |
853 | ||
05dbc7b5 | 854 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
855 | continue; |
856 | ||
1da177e4 LT |
857 | if (i > s_i) |
858 | s_num = 0; | |
859 | ||
7e3aab4a | 860 | spin_lock_bh(lock); |
3ab5aee7 | 861 | sk_nulls_for_each(sk, node, &head->chain) { |
e31c5e0e | 862 | int state, res; |
1da177e4 | 863 | |
51d7cccf AV |
864 | if (!net_eq(sock_net(sk), net)) |
865 | continue; | |
1da177e4 LT |
866 | if (num < s_num) |
867 | goto next_normal; | |
70315d22 NC |
868 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
869 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
079096f1 | 870 | if (!(idiag_states & (1 << state))) |
1da177e4 | 871 | goto next_normal; |
d23deaa0 | 872 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 873 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 874 | goto next_normal; |
05dbc7b5 | 875 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 876 | r->id.idiag_sport) |
1da177e4 | 877 | goto next_normal; |
05dbc7b5 | 878 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 879 | r->id.idiag_dport) |
1da177e4 | 880 | goto next_normal; |
a58917f5 ED |
881 | twsk_build_assert(); |
882 | ||
883 | if (!inet_diag_bc_sk(bc, sk)) | |
884 | goto next_normal; | |
885 | ||
886 | res = sk_diag_fill(sk, skb, r, | |
887 | sk_user_ns(NETLINK_CB(cb->skb).sk), | |
888 | NETLINK_CB(cb->skb).portid, | |
889 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
890 | cb->nlh); | |
05dbc7b5 | 891 | if (res < 0) { |
7e3aab4a | 892 | spin_unlock_bh(lock); |
1da177e4 LT |
893 | goto done; |
894 | } | |
895 | next_normal: | |
896 | ++num; | |
897 | } | |
898 | ||
7e3aab4a | 899 | spin_unlock_bh(lock); |
acffb584 | 900 | cond_resched(); |
1da177e4 LT |
901 | } |
902 | ||
903 | done: | |
904 | cb->args[1] = i; | |
905 | cb->args[2] = num; | |
efb3cb42 PE |
906 | out: |
907 | ; | |
908 | } | |
1942c518 | 909 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
910 | |
911 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
34160ea3 | 912 | const struct inet_diag_req_v2 *r, |
e31c5e0e | 913 | struct nlattr *bc) |
efb3cb42 PE |
914 | { |
915 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 916 | int err = 0; |
efb3cb42 PE |
917 | |
918 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
919 | if (!IS_ERR(handler)) | |
1942c518 | 920 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
921 | else |
922 | err = PTR_ERR(handler); | |
d523a328 | 923 | inet_diag_unlock_handler(handler); |
efb3cb42 | 924 | |
cacb6ba0 | 925 | return err ? : skb->len; |
1da177e4 LT |
926 | } |
927 | ||
25c4cd2b PE |
928 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
929 | { | |
c8991362 | 930 | int hdrlen = sizeof(struct inet_diag_req_v2); |
e31c5e0e | 931 | struct nlattr *bc = NULL; |
25c4cd2b PE |
932 | |
933 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
934 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
935 | ||
d106352d | 936 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
937 | } |
938 | ||
e31c5e0e | 939 | static int inet_diag_type2proto(int type) |
a029fe26 PE |
940 | { |
941 | switch (type) { | |
942 | case TCPDIAG_GETSOCK: | |
943 | return IPPROTO_TCP; | |
944 | case DCCPDIAG_GETSOCK: | |
945 | return IPPROTO_DCCP; | |
946 | default: | |
947 | return 0; | |
948 | } | |
949 | } | |
950 | ||
e31c5e0e ED |
951 | static int inet_diag_dump_compat(struct sk_buff *skb, |
952 | struct netlink_callback *cb) | |
25c4cd2b | 953 | { |
d106352d | 954 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
e31c5e0e | 955 | int hdrlen = sizeof(struct inet_diag_req); |
c8991362 | 956 | struct inet_diag_req_v2 req; |
25c4cd2b | 957 | struct nlattr *bc = NULL; |
25c4cd2b | 958 | |
d23deaa0 | 959 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
960 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
961 | req.idiag_ext = rc->idiag_ext; | |
962 | req.idiag_states = rc->idiag_states; | |
963 | req.id = rc->id; | |
964 | ||
965 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
966 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
967 | ||
968 | return __inet_diag_dump(skb, cb, &req, bc); | |
969 | } | |
970 | ||
fe50ce28 | 971 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
e31c5e0e | 972 | const struct nlmsghdr *nlh) |
fe50ce28 | 973 | { |
d106352d | 974 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 975 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
976 | |
977 | req.sdiag_family = rc->idiag_family; | |
978 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
979 | req.idiag_ext = rc->idiag_ext; | |
980 | req.idiag_states = rc->idiag_states; | |
981 | req.id = rc->id; | |
982 | ||
6eb5d2e0 | 983 | return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req); |
fe50ce28 PE |
984 | } |
985 | ||
8d34172d | 986 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 987 | { |
3b09c84c | 988 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 989 | struct net *net = sock_net(skb->sk); |
1da177e4 | 990 | |
ead592ba TG |
991 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
992 | nlmsg_len(nlh) < hdrlen) | |
993 | return -EINVAL; | |
1da177e4 | 994 | |
b8f3ab42 | 995 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
996 | if (nlmsg_attrlen(nlh, hdrlen)) { |
997 | struct nlattr *attr; | |
1da177e4 | 998 | |
ead592ba TG |
999 | attr = nlmsg_find_attr(nlh, hdrlen, |
1000 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1001 | if (!attr || |
ead592ba TG |
1002 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1003 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1004 | return -EINVAL; | |
1005 | } | |
80d326fa PNA |
1006 | { |
1007 | struct netlink_dump_control c = { | |
1008 | .dump = inet_diag_dump_compat, | |
1009 | }; | |
51d7cccf | 1010 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1011 | } |
1da177e4 | 1012 | } |
ead592ba | 1013 | |
fe50ce28 | 1014 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1015 | } |
1016 | ||
6eb5d2e0 | 1017 | static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h) |
d366477a | 1018 | { |
c8991362 | 1019 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1020 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1021 | |
1022 | if (nlmsg_len(h) < hdrlen) | |
1023 | return -EINVAL; | |
1024 | ||
6eb5d2e0 LC |
1025 | if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY && |
1026 | h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1027 | if (nlmsg_attrlen(h, hdrlen)) { |
1028 | struct nlattr *attr; | |
e31c5e0e | 1029 | |
25c4cd2b PE |
1030 | attr = nlmsg_find_attr(h, hdrlen, |
1031 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1032 | if (!attr || |
25c4cd2b PE |
1033 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1034 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1035 | return -EINVAL; | |
1036 | } | |
80d326fa PNA |
1037 | { |
1038 | struct netlink_dump_control c = { | |
1039 | .dump = inet_diag_dump, | |
1040 | }; | |
51d7cccf | 1041 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1042 | } |
d366477a PE |
1043 | } |
1044 | ||
6eb5d2e0 | 1045 | return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h)); |
d366477a PE |
1046 | } |
1047 | ||
35ac838a CG |
1048 | static |
1049 | int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk) | |
1050 | { | |
1051 | const struct inet_diag_handler *handler; | |
1052 | struct nlmsghdr *nlh; | |
1053 | struct nlattr *attr; | |
1054 | struct inet_diag_msg *r; | |
1055 | void *info = NULL; | |
1056 | int err = 0; | |
1057 | ||
1058 | nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0); | |
1059 | if (!nlh) | |
1060 | return -ENOMEM; | |
1061 | ||
1062 | r = nlmsg_data(nlh); | |
1063 | memset(r, 0, sizeof(*r)); | |
1064 | inet_diag_msg_common_fill(r, sk); | |
e0df02e0 CG |
1065 | if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM) |
1066 | r->id.idiag_sport = inet_sk(sk)->inet_sport; | |
35ac838a CG |
1067 | r->idiag_state = sk->sk_state; |
1068 | ||
1069 | if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) { | |
1070 | nlmsg_cancel(skb, nlh); | |
1071 | return err; | |
1072 | } | |
1073 | ||
1074 | handler = inet_diag_lock_handler(sk->sk_protocol); | |
1075 | if (IS_ERR(handler)) { | |
1076 | inet_diag_unlock_handler(handler); | |
1077 | nlmsg_cancel(skb, nlh); | |
1078 | return PTR_ERR(handler); | |
1079 | } | |
1080 | ||
1081 | attr = handler->idiag_info_size | |
6ed46d12 ND |
1082 | ? nla_reserve_64bit(skb, INET_DIAG_INFO, |
1083 | handler->idiag_info_size, | |
1084 | INET_DIAG_PAD) | |
35ac838a CG |
1085 | : NULL; |
1086 | if (attr) | |
1087 | info = nla_data(attr); | |
1088 | ||
1089 | handler->idiag_get_info(sk, r, info); | |
1090 | inet_diag_unlock_handler(handler); | |
1091 | ||
1092 | nlmsg_end(skb, nlh); | |
1093 | return 0; | |
1094 | } | |
1095 | ||
8dcf01fc | 1096 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a | 1097 | .family = AF_INET, |
6eb5d2e0 | 1098 | .dump = inet_diag_handler_cmd, |
35ac838a | 1099 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1100 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1101 | }; |
1102 | ||
8dcf01fc | 1103 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a | 1104 | .family = AF_INET6, |
6eb5d2e0 | 1105 | .dump = inet_diag_handler_cmd, |
35ac838a | 1106 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1107 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1108 | }; |
1109 | ||
4f5736c4 ACM |
1110 | int inet_diag_register(const struct inet_diag_handler *h) |
1111 | { | |
1112 | const __u16 type = h->idiag_type; | |
1113 | int err = -EINVAL; | |
1114 | ||
f13c95f0 | 1115 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1116 | goto out; |
1117 | ||
d523a328 | 1118 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1119 | err = -EEXIST; |
e31c5e0e | 1120 | if (!inet_diag_table[type]) { |
4f5736c4 ACM |
1121 | inet_diag_table[type] = h; |
1122 | err = 0; | |
1123 | } | |
d523a328 | 1124 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1125 | out: |
1126 | return err; | |
1127 | } | |
1128 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1129 | ||
1130 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1131 | { | |
1132 | const __u16 type = h->idiag_type; | |
1133 | ||
f13c95f0 | 1134 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1135 | return; |
1136 | ||
d523a328 | 1137 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1138 | inet_diag_table[type] = NULL; |
d523a328 | 1139 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1140 | } |
1141 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1142 | ||
73c1f4a0 | 1143 | static int __init inet_diag_init(void) |
1da177e4 | 1144 | { |
f13c95f0 | 1145 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1146 | sizeof(struct inet_diag_handler *)); |
1147 | int err = -ENOMEM; | |
1148 | ||
0da974f4 | 1149 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1150 | if (!inet_diag_table) |
1151 | goto out; | |
1152 | ||
d366477a PE |
1153 | err = sock_diag_register(&inet_diag_handler); |
1154 | if (err) | |
1155 | goto out_free_nl; | |
1156 | ||
1157 | err = sock_diag_register(&inet6_diag_handler); | |
1158 | if (err) | |
1159 | goto out_free_inet; | |
1160 | ||
8ef874bf | 1161 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1162 | out: |
1163 | return err; | |
d366477a PE |
1164 | |
1165 | out_free_inet: | |
1166 | sock_diag_unregister(&inet_diag_handler); | |
1167 | out_free_nl: | |
4f5736c4 ACM |
1168 | kfree(inet_diag_table); |
1169 | goto out; | |
1da177e4 LT |
1170 | } |
1171 | ||
73c1f4a0 | 1172 | static void __exit inet_diag_exit(void) |
1da177e4 | 1173 | { |
d366477a PE |
1174 | sock_diag_unregister(&inet6_diag_handler); |
1175 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1176 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1177 | kfree(inet_diag_table); |
1da177e4 LT |
1178 | } |
1179 | ||
73c1f4a0 ACM |
1180 | module_init(inet_diag_init); |
1181 | module_exit(inet_diag_exit); | |
1da177e4 | 1182 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1183 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1184 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |