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