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 | |
c8e2c80d ED |
96 | static size_t inet_sk_attr_size(void) |
97 | { | |
98 | return nla_total_size(sizeof(struct tcp_info)) | |
99 | + nla_total_size(1) /* INET_DIAG_SHUTDOWN */ | |
100 | + nla_total_size(1) /* INET_DIAG_TOS */ | |
101 | + nla_total_size(1) /* INET_DIAG_TCLASS */ | |
d545caca | 102 | + nla_total_size(4) /* INET_DIAG_MARK */ |
c8e2c80d ED |
103 | + nla_total_size(sizeof(struct inet_diag_meminfo)) |
104 | + nla_total_size(sizeof(struct inet_diag_msg)) | |
105 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) | |
106 | + nla_total_size(TCP_CA_NAME_MAX) | |
107 | + nla_total_size(sizeof(struct tcpvegas_info)) | |
108 | + 64; | |
109 | } | |
110 | ||
cb2050a7 XL |
111 | int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb, |
112 | struct inet_diag_msg *r, int ext, | |
d545caca LC |
113 | struct user_namespace *user_ns, |
114 | bool net_admin) | |
cb2050a7 XL |
115 | { |
116 | const struct inet_sock *inet = inet_sk(sk); | |
117 | ||
118 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) | |
119 | goto errout; | |
120 | ||
121 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, | |
122 | * hence this needs to be included regardless of socket family. | |
123 | */ | |
124 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
125 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) | |
126 | goto errout; | |
127 | ||
128 | #if IS_ENABLED(CONFIG_IPV6) | |
129 | if (r->idiag_family == AF_INET6) { | |
130 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) | |
131 | if (nla_put_u8(skb, INET_DIAG_TCLASS, | |
132 | inet6_sk(sk)->tclass) < 0) | |
133 | goto errout; | |
134 | ||
135 | if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) && | |
136 | nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk))) | |
137 | goto errout; | |
138 | } | |
139 | #endif | |
140 | ||
d545caca LC |
141 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark)) |
142 | goto errout; | |
143 | ||
cb2050a7 XL |
144 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
145 | r->idiag_inode = sock_i_ino(sk); | |
146 | ||
147 | return 0; | |
148 | errout: | |
149 | return 1; | |
150 | } | |
151 | EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill); | |
152 | ||
3c4d05c8 | 153 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 154 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
155 | struct user_namespace *user_ns, |
156 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca LC |
157 | const struct nlmsghdr *unlh, |
158 | bool net_admin) | |
1da177e4 | 159 | { |
521f1cf1 | 160 | const struct tcp_congestion_ops *ca_ops; |
e31c5e0e ED |
161 | const struct inet_diag_handler *handler; |
162 | int ext = req->idiag_ext; | |
73c1f4a0 | 163 | struct inet_diag_msg *r; |
1da177e4 | 164 | struct nlmsghdr *nlh; |
6e277ed5 | 165 | struct nlattr *attr; |
4f5736c4 | 166 | void *info = NULL; |
4f5736c4 | 167 | |
a029fe26 | 168 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 169 | BUG_ON(!handler); |
1da177e4 | 170 | |
15e47304 | 171 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
172 | nlmsg_flags); |
173 | if (!nlh) | |
d106352d | 174 | return -EMSGSIZE; |
4f5736c4 | 175 | |
d106352d | 176 | r = nlmsg_data(nlh); |
a58917f5 | 177 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 178 | |
a4458343 | 179 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
180 | r->idiag_state = sk->sk_state; |
181 | r->idiag_timer = 0; | |
182 | r->idiag_retrans = 0; | |
1da177e4 | 183 | |
d545caca | 184 | if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin)) |
e4e541a8 PE |
185 | goto errout; |
186 | ||
6e277ed5 TG |
187 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
188 | struct inet_diag_meminfo minfo = { | |
189 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
190 | .idiag_wmem = sk->sk_wmem_queued, | |
191 | .idiag_fmem = sk->sk_forward_alloc, | |
192 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
193 | }; | |
194 | ||
195 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
196 | goto errout; | |
3c4d05c8 PE |
197 | } |
198 | ||
c0636faa PE |
199 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
200 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 201 | goto errout; |
c0636faa | 202 | |
e31c5e0e | 203 | if (!icsk) { |
62ad6fcd | 204 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
205 | goto out; |
206 | } | |
207 | ||
6ba8a3b1 ND |
208 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
209 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || | |
210 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { | |
73c1f4a0 ACM |
211 | r->idiag_timer = 1; |
212 | r->idiag_retrans = icsk->icsk_retransmits; | |
b7de529c XL |
213 | r->idiag_expires = |
214 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
463c84b9 | 215 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
216 | r->idiag_timer = 4; |
217 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
218 | r->idiag_expires = |
219 | jiffies_to_msecs(icsk->icsk_timeout - jiffies); | |
1da177e4 | 220 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
221 | r->idiag_timer = 2; |
222 | r->idiag_retrans = icsk->icsk_probes_out; | |
b7de529c XL |
223 | r->idiag_expires = |
224 | jiffies_to_msecs(sk->sk_timer.expires - jiffies); | |
1da177e4 | 225 | } else { |
73c1f4a0 ACM |
226 | r->idiag_timer = 0; |
227 | r->idiag_expires = 0; | |
1da177e4 | 228 | } |
540722ff | 229 | |
3fd22af8 | 230 | if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { |
6ed46d12 ND |
231 | attr = nla_reserve_64bit(skb, INET_DIAG_INFO, |
232 | handler->idiag_info_size, | |
233 | INET_DIAG_PAD); | |
6e277ed5 TG |
234 | if (!attr) |
235 | goto errout; | |
3c4d05c8 | 236 | |
6e277ed5 | 237 | info = nla_data(attr); |
1da177e4 LT |
238 | } |
239 | ||
521f1cf1 ED |
240 | if (ext & (1 << (INET_DIAG_CONG - 1))) { |
241 | int err = 0; | |
242 | ||
243 | rcu_read_lock(); | |
244 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
245 | if (ca_ops) | |
246 | err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); | |
247 | rcu_read_unlock(); | |
248 | if (err < 0) | |
6e277ed5 | 249 | goto errout; |
521f1cf1 | 250 | } |
6e277ed5 | 251 | |
4f5736c4 | 252 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 253 | |
521f1cf1 | 254 | if (sk->sk_state < TCP_TIME_WAIT) { |
64f40ff5 ED |
255 | union tcp_cc_info info; |
256 | size_t sz = 0; | |
257 | int attr; | |
521f1cf1 ED |
258 | |
259 | rcu_read_lock(); | |
260 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
261 | if (ca_ops && ca_ops->get_info) | |
64f40ff5 | 262 | sz = ca_ops->get_info(sk, ext, &attr, &info); |
521f1cf1 | 263 | rcu_read_unlock(); |
64f40ff5 | 264 | if (sz && nla_put(skb, attr, sz, &info) < 0) |
521f1cf1 ED |
265 | goto errout; |
266 | } | |
1da177e4 | 267 | |
3c4d05c8 | 268 | out: |
053c095a JB |
269 | nlmsg_end(skb, nlh); |
270 | return 0; | |
1da177e4 | 271 | |
6e277ed5 TG |
272 | errout: |
273 | nlmsg_cancel(skb, nlh); | |
26932566 | 274 | return -EMSGSIZE; |
1da177e4 | 275 | } |
3c4d05c8 PE |
276 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
277 | ||
278 | static int inet_csk_diag_fill(struct sock *sk, | |
e31c5e0e | 279 | struct sk_buff *skb, |
34160ea3 | 280 | const struct inet_diag_req_v2 *req, |
d06ca956 | 281 | struct user_namespace *user_ns, |
15e47304 | 282 | u32 portid, u32 seq, u16 nlmsg_flags, |
d545caca LC |
283 | const struct nlmsghdr *unlh, |
284 | bool net_admin) | |
3c4d05c8 | 285 | { |
d545caca LC |
286 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, user_ns, |
287 | portid, seq, nlmsg_flags, unlh, net_admin); | |
3c4d05c8 | 288 | } |
1da177e4 | 289 | |
33cf7c90 | 290 | static int inet_twsk_diag_fill(struct sock *sk, |
e31c5e0e | 291 | struct sk_buff *skb, |
15e47304 | 292 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
293 | const struct nlmsghdr *unlh) |
294 | { | |
33cf7c90 | 295 | struct inet_timewait_sock *tw = inet_twsk(sk); |
c7d58aab | 296 | struct inet_diag_msg *r; |
6e277ed5 | 297 | struct nlmsghdr *nlh; |
789f558c | 298 | long tmo; |
d106352d | 299 | |
15e47304 | 300 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
301 | nlmsg_flags); |
302 | if (!nlh) | |
d106352d | 303 | return -EMSGSIZE; |
c7d58aab | 304 | |
d106352d | 305 | r = nlmsg_data(nlh); |
c7d58aab ACM |
306 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
307 | ||
789f558c | 308 | tmo = tw->tw_timer.expires - jiffies; |
c7d58aab ACM |
309 | if (tmo < 0) |
310 | tmo = 0; | |
311 | ||
a4458343 | 312 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 313 | r->idiag_retrans = 0; |
b1aac815 | 314 | |
c7d58aab ACM |
315 | r->idiag_state = tw->tw_substate; |
316 | r->idiag_timer = 3; | |
96f817fe | 317 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
318 | r->idiag_rqueue = 0; |
319 | r->idiag_wqueue = 0; | |
320 | r->idiag_uid = 0; | |
321 | r->idiag_inode = 0; | |
6e277ed5 | 322 | |
053c095a JB |
323 | nlmsg_end(skb, nlh); |
324 | return 0; | |
c7d58aab ACM |
325 | } |
326 | ||
a58917f5 ED |
327 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
328 | u32 portid, u32 seq, u16 nlmsg_flags, | |
d545caca | 329 | const struct nlmsghdr *unlh, bool net_admin) |
a58917f5 | 330 | { |
d545caca | 331 | struct request_sock *reqsk = inet_reqsk(sk); |
a58917f5 ED |
332 | struct inet_diag_msg *r; |
333 | struct nlmsghdr *nlh; | |
334 | long tmo; | |
335 | ||
336 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
337 | nlmsg_flags); | |
338 | if (!nlh) | |
339 | return -EMSGSIZE; | |
340 | ||
341 | r = nlmsg_data(nlh); | |
342 | inet_diag_msg_common_fill(r, sk); | |
343 | r->idiag_state = TCP_SYN_RECV; | |
344 | r->idiag_timer = 1; | |
d545caca | 345 | r->idiag_retrans = reqsk->num_retrans; |
a58917f5 ED |
346 | |
347 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
348 | offsetof(struct sock, sk_cookie)); | |
349 | ||
fa76ce73 | 350 | tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; |
a58917f5 ED |
351 | r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0; |
352 | r->idiag_rqueue = 0; | |
353 | r->idiag_wqueue = 0; | |
354 | r->idiag_uid = 0; | |
355 | r->idiag_inode = 0; | |
356 | ||
d545caca LC |
357 | if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, |
358 | inet_rsk(reqsk)->ir_mark)) | |
359 | return -EMSGSIZE; | |
360 | ||
a58917f5 ED |
361 | nlmsg_end(skb, nlh); |
362 | return 0; | |
363 | } | |
364 | ||
dff2c035 | 365 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 366 | const struct inet_diag_req_v2 *r, |
d06ca956 | 367 | struct user_namespace *user_ns, |
15e47304 | 368 | u32 portid, u32 seq, u16 nlmsg_flags, |
d545caca | 369 | const struct nlmsghdr *unlh, bool net_admin) |
dff2c035 ACM |
370 | { |
371 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 372 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
373 | nlmsg_flags, unlh); |
374 | ||
a58917f5 ED |
375 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
376 | return inet_req_diag_fill(sk, skb, portid, seq, | |
d545caca | 377 | nlmsg_flags, unlh, net_admin); |
a58917f5 | 378 | |
efe4208f | 379 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
d545caca | 380 | nlmsg_flags, unlh, net_admin); |
dff2c035 ACM |
381 | } |
382 | ||
b613f56e LC |
383 | struct sock *inet_diag_find_one_icsk(struct net *net, |
384 | struct inet_hashinfo *hashinfo, | |
385 | const struct inet_diag_req_v2 *req) | |
1da177e4 | 386 | { |
e31c5e0e | 387 | struct sock *sk; |
d523a328 | 388 | |
2d331915 | 389 | rcu_read_lock(); |
e31c5e0e | 390 | if (req->sdiag_family == AF_INET) |
a583636a | 391 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0], |
73c1f4a0 ACM |
392 | req->id.idiag_dport, req->id.idiag_src[0], |
393 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 394 | #if IS_ENABLED(CONFIG_IPV6) |
7c130672 ED |
395 | else if (req->sdiag_family == AF_INET6) { |
396 | if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) && | |
397 | ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src)) | |
a583636a | 398 | sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3], |
7c130672 ED |
399 | req->id.idiag_dport, req->id.idiag_src[3], |
400 | req->id.idiag_sport, req->id.idiag_if); | |
401 | else | |
a583636a | 402 | sk = inet6_lookup(net, hashinfo, NULL, 0, |
7c130672 ED |
403 | (struct in6_addr *)req->id.idiag_dst, |
404 | req->id.idiag_dport, | |
405 | (struct in6_addr *)req->id.idiag_src, | |
406 | req->id.idiag_sport, | |
407 | req->id.idiag_if); | |
408 | } | |
1da177e4 | 409 | #endif |
2d331915 ED |
410 | else { |
411 | rcu_read_unlock(); | |
b613f56e | 412 | return ERR_PTR(-EINVAL); |
2d331915 ED |
413 | } |
414 | rcu_read_unlock(); | |
e31c5e0e | 415 | if (!sk) |
b613f56e | 416 | return ERR_PTR(-ENOENT); |
1da177e4 | 417 | |
b613f56e LC |
418 | if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) { |
419 | sock_gen_put(sk); | |
420 | return ERR_PTR(-ENOENT); | |
421 | } | |
422 | ||
423 | return sk; | |
424 | } | |
425 | EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk); | |
426 | ||
427 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, | |
428 | struct sk_buff *in_skb, | |
429 | const struct nlmsghdr *nlh, | |
430 | const struct inet_diag_req_v2 *req) | |
431 | { | |
432 | struct net *net = sock_net(in_skb->sk); | |
433 | struct sk_buff *rep; | |
434 | struct sock *sk; | |
435 | int err; | |
436 | ||
437 | sk = inet_diag_find_one_icsk(net, hashinfo, req); | |
438 | if (IS_ERR(sk)) | |
439 | return PTR_ERR(sk); | |
1da177e4 | 440 | |
c8e2c80d | 441 | rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL); |
6e277ed5 TG |
442 | if (!rep) { |
443 | err = -ENOMEM; | |
1da177e4 | 444 | goto out; |
6e277ed5 | 445 | } |
1da177e4 | 446 | |
a029fe26 | 447 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 448 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 449 | NETLINK_CB(in_skb).portid, |
d545caca LC |
450 | nlh->nlmsg_seq, 0, nlh, |
451 | netlink_net_capable(in_skb, CAP_NET_ADMIN)); | |
26932566 PM |
452 | if (err < 0) { |
453 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 454 | nlmsg_free(rep); |
26932566 PM |
455 | goto out; |
456 | } | |
15e47304 | 457 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 458 | MSG_DONTWAIT); |
1da177e4 LT |
459 | if (err > 0) |
460 | err = 0; | |
461 | ||
462 | out: | |
c1d607cc ED |
463 | if (sk) |
464 | sock_gen_put(sk); | |
465 | ||
476f7dbf PE |
466 | return err; |
467 | } | |
1942c518 | 468 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf | 469 | |
6eb5d2e0 | 470 | static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb, |
476f7dbf | 471 | const struct nlmsghdr *nlh, |
34160ea3 | 472 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
473 | { |
474 | const struct inet_diag_handler *handler; | |
475 | int err; | |
476 | ||
477 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
478 | if (IS_ERR(handler)) | |
479 | err = PTR_ERR(handler); | |
6eb5d2e0 | 480 | else if (cmd == SOCK_DIAG_BY_FAMILY) |
1942c518 | 481 | err = handler->dump_one(in_skb, nlh, req); |
6eb5d2e0 LC |
482 | else if (cmd == SOCK_DESTROY && handler->destroy) |
483 | err = handler->destroy(in_skb, req); | |
484 | else | |
485 | err = -EOPNOTSUPP; | |
d523a328 | 486 | inet_diag_unlock_handler(handler); |
476f7dbf | 487 | |
1da177e4 LT |
488 | return err; |
489 | } | |
490 | ||
9f855299 | 491 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
492 | { |
493 | int words = bits >> 5; | |
494 | ||
495 | bits &= 0x1f; | |
496 | ||
497 | if (words) { | |
498 | if (memcmp(a1, a2, words << 2)) | |
499 | return 0; | |
500 | } | |
501 | if (bits) { | |
9f855299 AV |
502 | __be32 w1, w2; |
503 | __be32 mask; | |
1da177e4 LT |
504 | |
505 | w1 = a1[words]; | |
506 | w2 = a2[words]; | |
507 | ||
508 | mask = htonl((0xffffffff) << (32 - bits)); | |
509 | ||
510 | if ((w1 ^ w2) & mask) | |
511 | return 0; | |
512 | } | |
513 | ||
514 | return 1; | |
515 | } | |
516 | ||
87c22ea5 | 517 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 518 | const struct inet_diag_entry *entry) |
1da177e4 | 519 | { |
87c22ea5 PE |
520 | const void *bc = nla_data(_bc); |
521 | int len = nla_len(_bc); | |
522 | ||
1da177e4 LT |
523 | while (len > 0) { |
524 | int yes = 1; | |
73c1f4a0 | 525 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
526 | |
527 | switch (op->code) { | |
73c1f4a0 | 528 | case INET_DIAG_BC_NOP: |
1da177e4 | 529 | break; |
73c1f4a0 | 530 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
531 | yes = 0; |
532 | break; | |
73c1f4a0 | 533 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
534 | yes = entry->sport >= op[1].no; |
535 | break; | |
73c1f4a0 | 536 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 537 | yes = entry->sport <= op[1].no; |
1da177e4 | 538 | break; |
73c1f4a0 | 539 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
540 | yes = entry->dport >= op[1].no; |
541 | break; | |
73c1f4a0 | 542 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
543 | yes = entry->dport <= op[1].no; |
544 | break; | |
73c1f4a0 | 545 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
546 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
547 | break; | |
73c1f4a0 | 548 | case INET_DIAG_BC_S_COND: |
a8c2190e | 549 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
550 | const struct inet_diag_hostcond *cond; |
551 | const __be32 *addr; | |
1da177e4 | 552 | |
e31c5e0e | 553 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 554 | if (cond->port != -1 && |
73c1f4a0 | 555 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
556 | entry->sport : entry->dport)) { |
557 | yes = 0; | |
558 | break; | |
559 | } | |
4e852c02 | 560 | |
73c1f4a0 | 561 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
562 | addr = entry->saddr; |
563 | else | |
564 | addr = entry->daddr; | |
565 | ||
f67caec9 NC |
566 | if (cond->family != AF_UNSPEC && |
567 | cond->family != entry->family) { | |
568 | if (entry->family == AF_INET6 && | |
569 | cond->family == AF_INET) { | |
570 | if (addr[0] == 0 && addr[1] == 0 && | |
571 | addr[2] == htonl(0xffff) && | |
572 | bitstring_match(addr + 3, | |
573 | cond->addr, | |
574 | cond->prefix_len)) | |
575 | break; | |
576 | } | |
577 | yes = 0; | |
578 | break; | |
579 | } | |
580 | ||
581 | if (cond->prefix_len == 0) | |
582 | break; | |
4e852c02 ACM |
583 | if (bitstring_match(addr, cond->addr, |
584 | cond->prefix_len)) | |
1da177e4 | 585 | break; |
1da177e4 LT |
586 | yes = 0; |
587 | break; | |
588 | } | |
637c841d DA |
589 | case INET_DIAG_BC_DEV_COND: { |
590 | u32 ifindex; | |
591 | ||
592 | ifindex = *((const u32 *)(op + 1)); | |
593 | if (ifindex != entry->ifindex) | |
594 | yes = 0; | |
595 | break; | |
596 | } | |
a52e95ab LC |
597 | case INET_DIAG_BC_MARK_COND: { |
598 | struct inet_diag_markcond *cond; | |
599 | ||
600 | cond = (struct inet_diag_markcond *)(op + 1); | |
601 | if ((entry->mark & cond->mask) != cond->mark) | |
602 | yes = 0; | |
603 | break; | |
604 | } | |
1da177e4 LT |
605 | } |
606 | ||
4e852c02 | 607 | if (yes) { |
1da177e4 LT |
608 | len -= op->yes; |
609 | bc += op->yes; | |
610 | } else { | |
611 | len -= op->no; | |
612 | bc += op->no; | |
613 | } | |
614 | } | |
a02cec21 | 615 | return len == 0; |
1da177e4 LT |
616 | } |
617 | ||
a4458343 ED |
618 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
619 | */ | |
620 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
621 | const struct sock *sk) | |
622 | { | |
623 | #if IS_ENABLED(CONFIG_IPV6) | |
624 | if (sk->sk_family == AF_INET6) { | |
625 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
626 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
627 | } else | |
628 | #endif | |
629 | { | |
630 | entry->saddr = &sk->sk_rcv_saddr; | |
631 | entry->daddr = &sk->sk_daddr; | |
632 | } | |
633 | } | |
634 | ||
8d07d151 PE |
635 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
636 | { | |
8d07d151 | 637 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 638 | struct inet_diag_entry entry; |
8d07d151 | 639 | |
e31c5e0e | 640 | if (!bc) |
8d07d151 PE |
641 | return 1; |
642 | ||
643 | entry.family = sk->sk_family; | |
a4458343 | 644 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
645 | entry.sport = inet->inet_num; |
646 | entry.dport = ntohs(inet->inet_dport); | |
637c841d | 647 | entry.ifindex = sk->sk_bound_dev_if; |
a58917f5 | 648 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
a52e95ab LC |
649 | if (sk_fullsock(sk)) |
650 | entry.mark = sk->sk_mark; | |
651 | else if (sk->sk_state == TCP_NEW_SYN_RECV) | |
652 | entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark; | |
653 | else | |
654 | entry.mark = 0; | |
8d07d151 PE |
655 | |
656 | return inet_diag_bc_run(bc, &entry); | |
657 | } | |
658 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
659 | ||
1da177e4 LT |
660 | static int valid_cc(const void *bc, int len, int cc) |
661 | { | |
662 | while (len >= 0) { | |
73c1f4a0 | 663 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
664 | |
665 | if (cc > len) | |
666 | return 0; | |
667 | if (cc == len) | |
668 | return 1; | |
eeb14972 | 669 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
670 | return 0; |
671 | len -= op->yes; | |
672 | bc += op->yes; | |
673 | } | |
674 | return 0; | |
675 | } | |
676 | ||
637c841d DA |
677 | /* data is u32 ifindex */ |
678 | static bool valid_devcond(const struct inet_diag_bc_op *op, int len, | |
679 | int *min_len) | |
680 | { | |
681 | /* Check ifindex space. */ | |
682 | *min_len += sizeof(u32); | |
683 | if (len < *min_len) | |
684 | return false; | |
685 | ||
686 | return true; | |
687 | } | |
405c0059 NC |
688 | /* Validate an inet_diag_hostcond. */ |
689 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
690 | int *min_len) | |
691 | { | |
405c0059 | 692 | struct inet_diag_hostcond *cond; |
e31c5e0e | 693 | int addr_len; |
405c0059 NC |
694 | |
695 | /* Check hostcond space. */ | |
696 | *min_len += sizeof(struct inet_diag_hostcond); | |
697 | if (len < *min_len) | |
698 | return false; | |
699 | cond = (struct inet_diag_hostcond *)(op + 1); | |
700 | ||
701 | /* Check address family and address length. */ | |
702 | switch (cond->family) { | |
703 | case AF_UNSPEC: | |
704 | addr_len = 0; | |
705 | break; | |
706 | case AF_INET: | |
707 | addr_len = sizeof(struct in_addr); | |
708 | break; | |
709 | case AF_INET6: | |
710 | addr_len = sizeof(struct in6_addr); | |
711 | break; | |
712 | default: | |
713 | return false; | |
714 | } | |
715 | *min_len += addr_len; | |
716 | if (len < *min_len) | |
717 | return false; | |
718 | ||
719 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
720 | if (cond->prefix_len > 8 * addr_len) | |
721 | return false; | |
722 | ||
723 | return true; | |
724 | } | |
725 | ||
5e1f5420 | 726 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
727 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
728 | int len, int *min_len) | |
5e1f5420 NC |
729 | { |
730 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
731 | *min_len += sizeof(struct inet_diag_bc_op); | |
732 | if (len < *min_len) | |
733 | return false; | |
734 | return true; | |
735 | } | |
736 | ||
a52e95ab LC |
737 | static bool valid_markcond(const struct inet_diag_bc_op *op, int len, |
738 | int *min_len) | |
1da177e4 | 739 | { |
a52e95ab LC |
740 | *min_len += sizeof(struct inet_diag_markcond); |
741 | return len >= *min_len; | |
742 | } | |
743 | ||
744 | static int inet_diag_bc_audit(const struct nlattr *attr, | |
745 | const struct sk_buff *skb) | |
746 | { | |
747 | bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN); | |
627cc4ad LC |
748 | const void *bytecode, *bc; |
749 | int bytecode_len, len; | |
750 | ||
751 | if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op)) | |
752 | return -EINVAL; | |
753 | ||
754 | bytecode = bc = nla_data(attr); | |
755 | len = bytecode_len = nla_len(attr); | |
1da177e4 LT |
756 | |
757 | while (len > 0) { | |
405c0059 | 758 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 759 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 760 | |
1da177e4 | 761 | switch (op->code) { |
73c1f4a0 ACM |
762 | case INET_DIAG_BC_S_COND: |
763 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
764 | if (!valid_hostcond(bc, len, &min_len)) |
765 | return -EINVAL; | |
5e1f5420 | 766 | break; |
637c841d DA |
767 | case INET_DIAG_BC_DEV_COND: |
768 | if (!valid_devcond(bc, len, &min_len)) | |
769 | return -EINVAL; | |
770 | break; | |
73c1f4a0 ACM |
771 | case INET_DIAG_BC_S_GE: |
772 | case INET_DIAG_BC_S_LE: | |
773 | case INET_DIAG_BC_D_GE: | |
774 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 775 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
776 | return -EINVAL; |
777 | break; | |
a52e95ab LC |
778 | case INET_DIAG_BC_MARK_COND: |
779 | if (!net_admin) | |
780 | return -EPERM; | |
781 | if (!valid_markcond(bc, len, &min_len)) | |
782 | return -EINVAL; | |
783 | break; | |
5e1f5420 NC |
784 | case INET_DIAG_BC_AUTO: |
785 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 786 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
787 | break; |
788 | default: | |
789 | return -EINVAL; | |
790 | } | |
5e1f5420 NC |
791 | |
792 | if (op->code != INET_DIAG_BC_NOP) { | |
793 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
794 | return -EINVAL; | |
795 | if (op->no < len && | |
796 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
797 | return -EINVAL; | |
798 | } | |
799 | ||
405c0059 | 800 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 801 | return -EINVAL; |
4e852c02 | 802 | bc += op->yes; |
1da177e4 LT |
803 | len -= op->yes; |
804 | } | |
805 | return len == 0 ? 0 : -EINVAL; | |
806 | } | |
807 | ||
dff2c035 ACM |
808 | static int inet_csk_diag_dump(struct sock *sk, |
809 | struct sk_buff *skb, | |
37f352b5 | 810 | struct netlink_callback *cb, |
34160ea3 | 811 | const struct inet_diag_req_v2 *r, |
d545caca LC |
812 | const struct nlattr *bc, |
813 | bool net_admin) | |
1da177e4 | 814 | { |
8d07d151 PE |
815 | if (!inet_diag_bc_sk(bc, sk)) |
816 | return 0; | |
1da177e4 | 817 | |
a029fe26 | 818 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 819 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 820 | NETLINK_CB(cb->skb).portid, |
d545caca LC |
821 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh, |
822 | net_admin); | |
1da177e4 LT |
823 | } |
824 | ||
49612729 ED |
825 | static void twsk_build_assert(void) |
826 | { | |
827 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
828 | offsetof(struct sock, sk_family)); | |
829 | ||
830 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
831 | offsetof(struct inet_sock, inet_num)); | |
832 | ||
833 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
834 | offsetof(struct inet_sock, inet_dport)); | |
835 | ||
836 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
837 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
838 | ||
839 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
840 | offsetof(struct inet_sock, inet_daddr)); | |
841 | ||
842 | #if IS_ENABLED(CONFIG_IPV6) | |
843 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
844 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
845 | ||
846 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
847 | offsetof(struct sock, sk_v6_daddr)); | |
848 | #endif | |
849 | } | |
850 | ||
1942c518 | 851 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
e31c5e0e | 852 | struct netlink_callback *cb, |
34160ea3 | 853 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 | 854 | { |
51d7cccf | 855 | struct net *net = sock_net(skb->sk); |
e31c5e0e | 856 | int i, num, s_i, s_num; |
079096f1 | 857 | u32 idiag_states = r->idiag_states; |
d545caca | 858 | bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN); |
4e852c02 | 859 | |
079096f1 ED |
860 | if (idiag_states & TCPF_SYN_RECV) |
861 | idiag_states |= TCPF_NEW_SYN_RECV; | |
1da177e4 LT |
862 | s_i = cb->args[1]; |
863 | s_num = num = cb->args[2]; | |
4f5736c4 | 864 | |
1da177e4 | 865 | if (cb->args[0] == 0) { |
079096f1 | 866 | if (!(idiag_states & TCPF_LISTEN)) |
1da177e4 | 867 | goto skip_listen_ht; |
540722ff | 868 | |
0f7ff927 | 869 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 870 | struct inet_listen_hashbucket *ilb; |
e31c5e0e | 871 | struct sock *sk; |
1da177e4 LT |
872 | |
873 | num = 0; | |
5caea4ea ED |
874 | ilb = &hashinfo->listening_hash[i]; |
875 | spin_lock_bh(&ilb->lock); | |
3b24d854 | 876 | sk_for_each(sk, &ilb->head) { |
1da177e4 LT |
877 | struct inet_sock *inet = inet_sk(sk); |
878 | ||
51d7cccf AV |
879 | if (!net_eq(sock_net(sk), net)) |
880 | continue; | |
881 | ||
1da177e4 LT |
882 | if (num < s_num) { |
883 | num++; | |
884 | continue; | |
885 | } | |
886 | ||
d23deaa0 | 887 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 888 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
889 | goto next_listen; |
890 | ||
c720c7e8 | 891 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 892 | r->id.idiag_sport) |
1da177e4 LT |
893 | goto next_listen; |
894 | ||
079096f1 | 895 | if (r->id.idiag_dport || |
1da177e4 | 896 | cb->args[3] > 0) |
1da177e4 LT |
897 | goto next_listen; |
898 | ||
d545caca LC |
899 | if (inet_csk_diag_dump(sk, skb, cb, r, |
900 | bc, net_admin) < 0) { | |
5caea4ea | 901 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
902 | goto done; |
903 | } | |
904 | ||
905 | next_listen: | |
906 | cb->args[3] = 0; | |
907 | cb->args[4] = 0; | |
908 | ++num; | |
909 | } | |
5caea4ea | 910 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
911 | |
912 | s_num = 0; | |
913 | cb->args[3] = 0; | |
914 | cb->args[4] = 0; | |
915 | } | |
1da177e4 LT |
916 | skip_listen_ht: |
917 | cb->args[0] = 1; | |
918 | s_i = num = s_num = 0; | |
919 | } | |
920 | ||
079096f1 | 921 | if (!(idiag_states & ~TCPF_LISTEN)) |
efb3cb42 | 922 | goto out; |
1da177e4 | 923 | |
f373b53b | 924 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 925 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 926 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 927 | struct hlist_nulls_node *node; |
e31c5e0e | 928 | struct sock *sk; |
1da177e4 | 929 | |
6be547a6 AK |
930 | num = 0; |
931 | ||
05dbc7b5 | 932 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
933 | continue; |
934 | ||
1da177e4 LT |
935 | if (i > s_i) |
936 | s_num = 0; | |
937 | ||
7e3aab4a | 938 | spin_lock_bh(lock); |
3ab5aee7 | 939 | sk_nulls_for_each(sk, node, &head->chain) { |
e31c5e0e | 940 | int state, res; |
1da177e4 | 941 | |
51d7cccf AV |
942 | if (!net_eq(sock_net(sk), net)) |
943 | continue; | |
1da177e4 LT |
944 | if (num < s_num) |
945 | goto next_normal; | |
70315d22 NC |
946 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
947 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
079096f1 | 948 | if (!(idiag_states & (1 << state))) |
1da177e4 | 949 | goto next_normal; |
d23deaa0 | 950 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 951 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 952 | goto next_normal; |
05dbc7b5 | 953 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 954 | r->id.idiag_sport) |
1da177e4 | 955 | goto next_normal; |
05dbc7b5 | 956 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 957 | r->id.idiag_dport) |
1da177e4 | 958 | goto next_normal; |
a58917f5 ED |
959 | twsk_build_assert(); |
960 | ||
961 | if (!inet_diag_bc_sk(bc, sk)) | |
962 | goto next_normal; | |
963 | ||
964 | res = sk_diag_fill(sk, skb, r, | |
965 | sk_user_ns(NETLINK_CB(cb->skb).sk), | |
966 | NETLINK_CB(cb->skb).portid, | |
967 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
d545caca | 968 | cb->nlh, net_admin); |
05dbc7b5 | 969 | if (res < 0) { |
7e3aab4a | 970 | spin_unlock_bh(lock); |
1da177e4 LT |
971 | goto done; |
972 | } | |
973 | next_normal: | |
974 | ++num; | |
975 | } | |
976 | ||
7e3aab4a | 977 | spin_unlock_bh(lock); |
acffb584 | 978 | cond_resched(); |
1da177e4 LT |
979 | } |
980 | ||
981 | done: | |
982 | cb->args[1] = i; | |
983 | cb->args[2] = num; | |
efb3cb42 PE |
984 | out: |
985 | ; | |
986 | } | |
1942c518 | 987 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
988 | |
989 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
34160ea3 | 990 | const struct inet_diag_req_v2 *r, |
e31c5e0e | 991 | struct nlattr *bc) |
efb3cb42 PE |
992 | { |
993 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 994 | int err = 0; |
efb3cb42 PE |
995 | |
996 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
997 | if (!IS_ERR(handler)) | |
1942c518 | 998 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
999 | else |
1000 | err = PTR_ERR(handler); | |
d523a328 | 1001 | inet_diag_unlock_handler(handler); |
efb3cb42 | 1002 | |
cacb6ba0 | 1003 | return err ? : skb->len; |
1da177e4 LT |
1004 | } |
1005 | ||
25c4cd2b PE |
1006 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1007 | { | |
c8991362 | 1008 | int hdrlen = sizeof(struct inet_diag_req_v2); |
e31c5e0e | 1009 | struct nlattr *bc = NULL; |
25c4cd2b PE |
1010 | |
1011 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1012 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1013 | ||
d106352d | 1014 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
1015 | } |
1016 | ||
e31c5e0e | 1017 | static int inet_diag_type2proto(int type) |
a029fe26 PE |
1018 | { |
1019 | switch (type) { | |
1020 | case TCPDIAG_GETSOCK: | |
1021 | return IPPROTO_TCP; | |
1022 | case DCCPDIAG_GETSOCK: | |
1023 | return IPPROTO_DCCP; | |
1024 | default: | |
1025 | return 0; | |
1026 | } | |
1027 | } | |
1028 | ||
e31c5e0e ED |
1029 | static int inet_diag_dump_compat(struct sk_buff *skb, |
1030 | struct netlink_callback *cb) | |
25c4cd2b | 1031 | { |
d106352d | 1032 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
e31c5e0e | 1033 | int hdrlen = sizeof(struct inet_diag_req); |
c8991362 | 1034 | struct inet_diag_req_v2 req; |
25c4cd2b | 1035 | struct nlattr *bc = NULL; |
25c4cd2b | 1036 | |
d23deaa0 | 1037 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
1038 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
1039 | req.idiag_ext = rc->idiag_ext; | |
1040 | req.idiag_states = rc->idiag_states; | |
1041 | req.id = rc->id; | |
1042 | ||
1043 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1044 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1045 | ||
1046 | return __inet_diag_dump(skb, cb, &req, bc); | |
1047 | } | |
1048 | ||
fe50ce28 | 1049 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
e31c5e0e | 1050 | const struct nlmsghdr *nlh) |
fe50ce28 | 1051 | { |
d106352d | 1052 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 1053 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
1054 | |
1055 | req.sdiag_family = rc->idiag_family; | |
1056 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
1057 | req.idiag_ext = rc->idiag_ext; | |
1058 | req.idiag_states = rc->idiag_states; | |
1059 | req.id = rc->id; | |
1060 | ||
6eb5d2e0 | 1061 | return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req); |
fe50ce28 PE |
1062 | } |
1063 | ||
8d34172d | 1064 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1065 | { |
3b09c84c | 1066 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 1067 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1068 | |
ead592ba TG |
1069 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
1070 | nlmsg_len(nlh) < hdrlen) | |
1071 | return -EINVAL; | |
1da177e4 | 1072 | |
b8f3ab42 | 1073 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1074 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1075 | struct nlattr *attr; | |
627cc4ad | 1076 | int err; |
1da177e4 | 1077 | |
ead592ba TG |
1078 | attr = nlmsg_find_attr(nlh, hdrlen, |
1079 | INET_DIAG_REQ_BYTECODE); | |
a52e95ab | 1080 | err = inet_diag_bc_audit(attr, skb); |
627cc4ad LC |
1081 | if (err) |
1082 | return err; | |
ead592ba | 1083 | } |
80d326fa PNA |
1084 | { |
1085 | struct netlink_dump_control c = { | |
1086 | .dump = inet_diag_dump_compat, | |
1087 | }; | |
51d7cccf | 1088 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1089 | } |
1da177e4 | 1090 | } |
ead592ba | 1091 | |
fe50ce28 | 1092 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1093 | } |
1094 | ||
6eb5d2e0 | 1095 | static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h) |
d366477a | 1096 | { |
c8991362 | 1097 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1098 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1099 | |
1100 | if (nlmsg_len(h) < hdrlen) | |
1101 | return -EINVAL; | |
1102 | ||
6eb5d2e0 LC |
1103 | if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY && |
1104 | h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1105 | if (nlmsg_attrlen(h, hdrlen)) { |
1106 | struct nlattr *attr; | |
627cc4ad | 1107 | int err; |
e31c5e0e | 1108 | |
25c4cd2b PE |
1109 | attr = nlmsg_find_attr(h, hdrlen, |
1110 | INET_DIAG_REQ_BYTECODE); | |
a52e95ab | 1111 | err = inet_diag_bc_audit(attr, skb); |
627cc4ad LC |
1112 | if (err) |
1113 | return err; | |
25c4cd2b | 1114 | } |
80d326fa PNA |
1115 | { |
1116 | struct netlink_dump_control c = { | |
1117 | .dump = inet_diag_dump, | |
1118 | }; | |
51d7cccf | 1119 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1120 | } |
d366477a PE |
1121 | } |
1122 | ||
6eb5d2e0 | 1123 | return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h)); |
d366477a PE |
1124 | } |
1125 | ||
35ac838a CG |
1126 | static |
1127 | int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk) | |
1128 | { | |
1129 | const struct inet_diag_handler *handler; | |
1130 | struct nlmsghdr *nlh; | |
1131 | struct nlattr *attr; | |
1132 | struct inet_diag_msg *r; | |
1133 | void *info = NULL; | |
1134 | int err = 0; | |
1135 | ||
1136 | nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0); | |
1137 | if (!nlh) | |
1138 | return -ENOMEM; | |
1139 | ||
1140 | r = nlmsg_data(nlh); | |
1141 | memset(r, 0, sizeof(*r)); | |
1142 | inet_diag_msg_common_fill(r, sk); | |
e0df02e0 CG |
1143 | if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM) |
1144 | r->id.idiag_sport = inet_sk(sk)->inet_sport; | |
35ac838a CG |
1145 | r->idiag_state = sk->sk_state; |
1146 | ||
1147 | if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) { | |
1148 | nlmsg_cancel(skb, nlh); | |
1149 | return err; | |
1150 | } | |
1151 | ||
1152 | handler = inet_diag_lock_handler(sk->sk_protocol); | |
1153 | if (IS_ERR(handler)) { | |
1154 | inet_diag_unlock_handler(handler); | |
1155 | nlmsg_cancel(skb, nlh); | |
1156 | return PTR_ERR(handler); | |
1157 | } | |
1158 | ||
1159 | attr = handler->idiag_info_size | |
6ed46d12 ND |
1160 | ? nla_reserve_64bit(skb, INET_DIAG_INFO, |
1161 | handler->idiag_info_size, | |
1162 | INET_DIAG_PAD) | |
35ac838a CG |
1163 | : NULL; |
1164 | if (attr) | |
1165 | info = nla_data(attr); | |
1166 | ||
1167 | handler->idiag_get_info(sk, r, info); | |
1168 | inet_diag_unlock_handler(handler); | |
1169 | ||
1170 | nlmsg_end(skb, nlh); | |
1171 | return 0; | |
1172 | } | |
1173 | ||
8dcf01fc | 1174 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a | 1175 | .family = AF_INET, |
6eb5d2e0 | 1176 | .dump = inet_diag_handler_cmd, |
35ac838a | 1177 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1178 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1179 | }; |
1180 | ||
8dcf01fc | 1181 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a | 1182 | .family = AF_INET6, |
6eb5d2e0 | 1183 | .dump = inet_diag_handler_cmd, |
35ac838a | 1184 | .get_info = inet_diag_handler_get_info, |
6eb5d2e0 | 1185 | .destroy = inet_diag_handler_cmd, |
d366477a PE |
1186 | }; |
1187 | ||
4f5736c4 ACM |
1188 | int inet_diag_register(const struct inet_diag_handler *h) |
1189 | { | |
1190 | const __u16 type = h->idiag_type; | |
1191 | int err = -EINVAL; | |
1192 | ||
f13c95f0 | 1193 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1194 | goto out; |
1195 | ||
d523a328 | 1196 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1197 | err = -EEXIST; |
e31c5e0e | 1198 | if (!inet_diag_table[type]) { |
4f5736c4 ACM |
1199 | inet_diag_table[type] = h; |
1200 | err = 0; | |
1201 | } | |
d523a328 | 1202 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1203 | out: |
1204 | return err; | |
1205 | } | |
1206 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1207 | ||
1208 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1209 | { | |
1210 | const __u16 type = h->idiag_type; | |
1211 | ||
f13c95f0 | 1212 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1213 | return; |
1214 | ||
d523a328 | 1215 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1216 | inet_diag_table[type] = NULL; |
d523a328 | 1217 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1218 | } |
1219 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1220 | ||
73c1f4a0 | 1221 | static int __init inet_diag_init(void) |
1da177e4 | 1222 | { |
f13c95f0 | 1223 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1224 | sizeof(struct inet_diag_handler *)); |
1225 | int err = -ENOMEM; | |
1226 | ||
0da974f4 | 1227 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1228 | if (!inet_diag_table) |
1229 | goto out; | |
1230 | ||
d366477a PE |
1231 | err = sock_diag_register(&inet_diag_handler); |
1232 | if (err) | |
1233 | goto out_free_nl; | |
1234 | ||
1235 | err = sock_diag_register(&inet6_diag_handler); | |
1236 | if (err) | |
1237 | goto out_free_inet; | |
1238 | ||
8ef874bf | 1239 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1240 | out: |
1241 | return err; | |
d366477a PE |
1242 | |
1243 | out_free_inet: | |
1244 | sock_diag_unregister(&inet_diag_handler); | |
1245 | out_free_nl: | |
4f5736c4 ACM |
1246 | kfree(inet_diag_table); |
1247 | goto out; | |
1da177e4 LT |
1248 | } |
1249 | ||
73c1f4a0 | 1250 | static void __exit inet_diag_exit(void) |
1da177e4 | 1251 | { |
d366477a PE |
1252 | sock_diag_unregister(&inet6_diag_handler); |
1253 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1254 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1255 | kfree(inet_diag_table); |
1da177e4 LT |
1256 | } |
1257 | ||
73c1f4a0 ACM |
1258 | module_init(inet_diag_init); |
1259 | module_exit(inet_diag_exit); | |
1da177e4 | 1260 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1261 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1262 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |