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 | ||
a4458343 ED |
69 | static void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk) |
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 | } | |
92 | ||
c8e2c80d ED |
93 | static size_t inet_sk_attr_size(void) |
94 | { | |
95 | return nla_total_size(sizeof(struct tcp_info)) | |
96 | + nla_total_size(1) /* INET_DIAG_SHUTDOWN */ | |
97 | + nla_total_size(1) /* INET_DIAG_TOS */ | |
98 | + nla_total_size(1) /* INET_DIAG_TCLASS */ | |
99 | + nla_total_size(sizeof(struct inet_diag_meminfo)) | |
100 | + nla_total_size(sizeof(struct inet_diag_msg)) | |
101 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) | |
102 | + nla_total_size(TCP_CA_NAME_MAX) | |
103 | + nla_total_size(sizeof(struct tcpvegas_info)) | |
104 | + 64; | |
105 | } | |
106 | ||
3c4d05c8 | 107 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
34160ea3 | 108 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
e31c5e0e ED |
109 | struct user_namespace *user_ns, |
110 | u32 portid, u32 seq, u16 nlmsg_flags, | |
111 | const struct nlmsghdr *unlh) | |
1da177e4 | 112 | { |
463c84b9 | 113 | const struct inet_sock *inet = inet_sk(sk); |
521f1cf1 | 114 | const struct tcp_congestion_ops *ca_ops; |
e31c5e0e ED |
115 | const struct inet_diag_handler *handler; |
116 | int ext = req->idiag_ext; | |
73c1f4a0 | 117 | struct inet_diag_msg *r; |
1da177e4 | 118 | struct nlmsghdr *nlh; |
6e277ed5 | 119 | struct nlattr *attr; |
4f5736c4 | 120 | void *info = NULL; |
4f5736c4 | 121 | |
a029fe26 | 122 | handler = inet_diag_table[req->sdiag_protocol]; |
e31c5e0e | 123 | BUG_ON(!handler); |
1da177e4 | 124 | |
15e47304 | 125 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
126 | nlmsg_flags); |
127 | if (!nlh) | |
d106352d | 128 | return -EMSGSIZE; |
4f5736c4 | 129 | |
d106352d | 130 | r = nlmsg_data(nlh); |
a58917f5 | 131 | BUG_ON(!sk_fullsock(sk)); |
c7d58aab | 132 | |
a4458343 | 133 | inet_diag_msg_common_fill(r, sk); |
73c1f4a0 ACM |
134 | r->idiag_state = sk->sk_state; |
135 | r->idiag_timer = 0; | |
136 | r->idiag_retrans = 0; | |
1da177e4 | 137 | |
e4e541a8 PE |
138 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) |
139 | goto errout; | |
140 | ||
717b6d83 MŻ |
141 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
142 | * hence this needs to be included regardless of socket family. | |
143 | */ | |
144 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
6e277ed5 TG |
145 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
146 | goto errout; | |
717b6d83 | 147 | |
dfd56b8b | 148 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 149 | if (r->idiag_family == AF_INET6) { |
06236ac3 | 150 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
efe4208f ED |
151 | if (nla_put_u8(skb, INET_DIAG_TCLASS, |
152 | inet6_sk(sk)->tclass) < 0) | |
6e277ed5 | 153 | goto errout; |
1da177e4 LT |
154 | } |
155 | #endif | |
156 | ||
d06ca956 | 157 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
3c4d05c8 PE |
158 | r->idiag_inode = sock_i_ino(sk); |
159 | ||
6e277ed5 TG |
160 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
161 | struct inet_diag_meminfo minfo = { | |
162 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
163 | .idiag_wmem = sk->sk_wmem_queued, | |
164 | .idiag_fmem = sk->sk_forward_alloc, | |
165 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
166 | }; | |
167 | ||
168 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
169 | goto errout; | |
3c4d05c8 PE |
170 | } |
171 | ||
c0636faa PE |
172 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
173 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 174 | goto errout; |
c0636faa | 175 | |
e31c5e0e | 176 | if (!icsk) { |
62ad6fcd | 177 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
178 | goto out; |
179 | } | |
180 | ||
172589cc | 181 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 182 | |
6ba8a3b1 ND |
183 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
184 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || | |
185 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { | |
73c1f4a0 ACM |
186 | r->idiag_timer = 1; |
187 | r->idiag_retrans = icsk->icsk_retransmits; | |
188 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 189 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
190 | r->idiag_timer = 4; |
191 | r->idiag_retrans = icsk->icsk_probes_out; | |
192 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 193 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
194 | r->idiag_timer = 2; |
195 | r->idiag_retrans = icsk->icsk_probes_out; | |
196 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 197 | } else { |
73c1f4a0 ACM |
198 | r->idiag_timer = 0; |
199 | r->idiag_expires = 0; | |
1da177e4 LT |
200 | } |
201 | #undef EXPIRES_IN_MS | |
540722ff | 202 | |
6e277ed5 TG |
203 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
204 | attr = nla_reserve(skb, INET_DIAG_INFO, | |
205 | sizeof(struct tcp_info)); | |
206 | if (!attr) | |
207 | goto errout; | |
3c4d05c8 | 208 | |
6e277ed5 | 209 | info = nla_data(attr); |
1da177e4 LT |
210 | } |
211 | ||
521f1cf1 ED |
212 | if (ext & (1 << (INET_DIAG_CONG - 1))) { |
213 | int err = 0; | |
214 | ||
215 | rcu_read_lock(); | |
216 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
217 | if (ca_ops) | |
218 | err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name); | |
219 | rcu_read_unlock(); | |
220 | if (err < 0) | |
6e277ed5 | 221 | goto errout; |
521f1cf1 | 222 | } |
6e277ed5 | 223 | |
4f5736c4 | 224 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 225 | |
521f1cf1 ED |
226 | if (sk->sk_state < TCP_TIME_WAIT) { |
227 | int err = 0; | |
228 | ||
229 | rcu_read_lock(); | |
230 | ca_ops = READ_ONCE(icsk->icsk_ca_ops); | |
231 | if (ca_ops && ca_ops->get_info) | |
232 | err = ca_ops->get_info(sk, ext, skb); | |
233 | rcu_read_unlock(); | |
234 | if (err < 0) | |
235 | goto errout; | |
236 | } | |
1da177e4 | 237 | |
3c4d05c8 | 238 | out: |
053c095a JB |
239 | nlmsg_end(skb, nlh); |
240 | return 0; | |
1da177e4 | 241 | |
6e277ed5 TG |
242 | errout: |
243 | nlmsg_cancel(skb, nlh); | |
26932566 | 244 | return -EMSGSIZE; |
1da177e4 | 245 | } |
3c4d05c8 PE |
246 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
247 | ||
248 | static int inet_csk_diag_fill(struct sock *sk, | |
e31c5e0e | 249 | struct sk_buff *skb, |
34160ea3 | 250 | const struct inet_diag_req_v2 *req, |
d06ca956 | 251 | struct user_namespace *user_ns, |
15e47304 | 252 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
253 | const struct nlmsghdr *unlh) |
254 | { | |
e31c5e0e ED |
255 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, |
256 | user_ns, portid, seq, nlmsg_flags, unlh); | |
3c4d05c8 | 257 | } |
1da177e4 | 258 | |
33cf7c90 | 259 | static int inet_twsk_diag_fill(struct sock *sk, |
e31c5e0e | 260 | struct sk_buff *skb, |
15e47304 | 261 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
262 | const struct nlmsghdr *unlh) |
263 | { | |
33cf7c90 | 264 | struct inet_timewait_sock *tw = inet_twsk(sk); |
c7d58aab | 265 | struct inet_diag_msg *r; |
6e277ed5 | 266 | struct nlmsghdr *nlh; |
789f558c | 267 | long tmo; |
d106352d | 268 | |
15e47304 | 269 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
270 | nlmsg_flags); |
271 | if (!nlh) | |
d106352d | 272 | return -EMSGSIZE; |
c7d58aab | 273 | |
d106352d | 274 | r = nlmsg_data(nlh); |
c7d58aab ACM |
275 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
276 | ||
789f558c | 277 | tmo = tw->tw_timer.expires - jiffies; |
c7d58aab ACM |
278 | if (tmo < 0) |
279 | tmo = 0; | |
280 | ||
a4458343 | 281 | inet_diag_msg_common_fill(r, sk); |
c7d58aab | 282 | r->idiag_retrans = 0; |
b1aac815 | 283 | |
c7d58aab ACM |
284 | r->idiag_state = tw->tw_substate; |
285 | r->idiag_timer = 3; | |
96f817fe | 286 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
287 | r->idiag_rqueue = 0; |
288 | r->idiag_wqueue = 0; | |
289 | r->idiag_uid = 0; | |
290 | r->idiag_inode = 0; | |
6e277ed5 | 291 | |
053c095a JB |
292 | nlmsg_end(skb, nlh); |
293 | return 0; | |
c7d58aab ACM |
294 | } |
295 | ||
a58917f5 ED |
296 | static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb, |
297 | u32 portid, u32 seq, u16 nlmsg_flags, | |
298 | const struct nlmsghdr *unlh) | |
299 | { | |
300 | struct inet_diag_msg *r; | |
301 | struct nlmsghdr *nlh; | |
302 | long tmo; | |
303 | ||
304 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), | |
305 | nlmsg_flags); | |
306 | if (!nlh) | |
307 | return -EMSGSIZE; | |
308 | ||
309 | r = nlmsg_data(nlh); | |
310 | inet_diag_msg_common_fill(r, sk); | |
311 | r->idiag_state = TCP_SYN_RECV; | |
312 | r->idiag_timer = 1; | |
313 | r->idiag_retrans = inet_reqsk(sk)->num_retrans; | |
314 | ||
315 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != | |
316 | offsetof(struct sock, sk_cookie)); | |
317 | ||
fa76ce73 | 318 | tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies; |
a58917f5 ED |
319 | r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0; |
320 | r->idiag_rqueue = 0; | |
321 | r->idiag_wqueue = 0; | |
322 | r->idiag_uid = 0; | |
323 | r->idiag_inode = 0; | |
324 | ||
325 | nlmsg_end(skb, nlh); | |
326 | return 0; | |
327 | } | |
328 | ||
dff2c035 | 329 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
34160ea3 | 330 | const struct inet_diag_req_v2 *r, |
d06ca956 | 331 | struct user_namespace *user_ns, |
15e47304 | 332 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
333 | const struct nlmsghdr *unlh) |
334 | { | |
335 | if (sk->sk_state == TCP_TIME_WAIT) | |
a58917f5 | 336 | return inet_twsk_diag_fill(sk, skb, portid, seq, |
efe4208f ED |
337 | nlmsg_flags, unlh); |
338 | ||
a58917f5 ED |
339 | if (sk->sk_state == TCP_NEW_SYN_RECV) |
340 | return inet_req_diag_fill(sk, skb, portid, seq, | |
341 | nlmsg_flags, unlh); | |
342 | ||
efe4208f ED |
343 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
344 | nlmsg_flags, unlh); | |
dff2c035 ACM |
345 | } |
346 | ||
e31c5e0e ED |
347 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, |
348 | struct sk_buff *in_skb, | |
349 | const struct nlmsghdr *nlh, | |
34160ea3 | 350 | const struct inet_diag_req_v2 *req) |
1da177e4 | 351 | { |
51d7cccf | 352 | struct net *net = sock_net(in_skb->sk); |
e31c5e0e ED |
353 | struct sk_buff *rep; |
354 | struct sock *sk; | |
355 | int err; | |
d523a328 | 356 | |
d523a328 | 357 | err = -EINVAL; |
e31c5e0e | 358 | if (req->sdiag_family == AF_INET) |
51d7cccf | 359 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
360 | req->id.idiag_dport, req->id.idiag_src[0], |
361 | req->id.idiag_sport, req->id.idiag_if); | |
dfd56b8b | 362 | #if IS_ENABLED(CONFIG_IPV6) |
e31c5e0e | 363 | else if (req->sdiag_family == AF_INET6) |
51d7cccf | 364 | sk = inet6_lookup(net, hashinfo, |
73c1f4a0 ACM |
365 | (struct in6_addr *)req->id.idiag_dst, |
366 | req->id.idiag_dport, | |
367 | (struct in6_addr *)req->id.idiag_src, | |
368 | req->id.idiag_sport, | |
369 | req->id.idiag_if); | |
1da177e4 | 370 | #endif |
e31c5e0e | 371 | else |
476f7dbf | 372 | goto out_nosk; |
1da177e4 | 373 | |
d523a328 | 374 | err = -ENOENT; |
e31c5e0e | 375 | if (!sk) |
476f7dbf | 376 | goto out_nosk; |
1da177e4 | 377 | |
f65c1b53 | 378 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 379 | if (err) |
1da177e4 LT |
380 | goto out; |
381 | ||
c8e2c80d | 382 | rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL); |
6e277ed5 TG |
383 | if (!rep) { |
384 | err = -ENOMEM; | |
1da177e4 | 385 | goto out; |
6e277ed5 | 386 | } |
1da177e4 | 387 | |
a029fe26 | 388 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 389 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 390 | NETLINK_CB(in_skb).portid, |
26932566 PM |
391 | nlh->nlmsg_seq, 0, nlh); |
392 | if (err < 0) { | |
393 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 394 | nlmsg_free(rep); |
26932566 PM |
395 | goto out; |
396 | } | |
15e47304 | 397 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 398 | MSG_DONTWAIT); |
1da177e4 LT |
399 | if (err > 0) |
400 | err = 0; | |
401 | ||
402 | out: | |
c1d607cc ED |
403 | if (sk) |
404 | sock_gen_put(sk); | |
405 | ||
476f7dbf PE |
406 | out_nosk: |
407 | return err; | |
408 | } | |
1942c518 | 409 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
410 | |
411 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
412 | const struct nlmsghdr *nlh, | |
34160ea3 | 413 | const struct inet_diag_req_v2 *req) |
476f7dbf PE |
414 | { |
415 | const struct inet_diag_handler *handler; | |
416 | int err; | |
417 | ||
418 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
419 | if (IS_ERR(handler)) | |
420 | err = PTR_ERR(handler); | |
421 | else | |
1942c518 | 422 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 423 | inet_diag_unlock_handler(handler); |
476f7dbf | 424 | |
1da177e4 LT |
425 | return err; |
426 | } | |
427 | ||
9f855299 | 428 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
429 | { |
430 | int words = bits >> 5; | |
431 | ||
432 | bits &= 0x1f; | |
433 | ||
434 | if (words) { | |
435 | if (memcmp(a1, a2, words << 2)) | |
436 | return 0; | |
437 | } | |
438 | if (bits) { | |
9f855299 AV |
439 | __be32 w1, w2; |
440 | __be32 mask; | |
1da177e4 LT |
441 | |
442 | w1 = a1[words]; | |
443 | w2 = a2[words]; | |
444 | ||
445 | mask = htonl((0xffffffff) << (32 - bits)); | |
446 | ||
447 | if ((w1 ^ w2) & mask) | |
448 | return 0; | |
449 | } | |
450 | ||
451 | return 1; | |
452 | } | |
453 | ||
87c22ea5 | 454 | static int inet_diag_bc_run(const struct nlattr *_bc, |
e31c5e0e | 455 | const struct inet_diag_entry *entry) |
1da177e4 | 456 | { |
87c22ea5 PE |
457 | const void *bc = nla_data(_bc); |
458 | int len = nla_len(_bc); | |
459 | ||
1da177e4 LT |
460 | while (len > 0) { |
461 | int yes = 1; | |
73c1f4a0 | 462 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
463 | |
464 | switch (op->code) { | |
73c1f4a0 | 465 | case INET_DIAG_BC_NOP: |
1da177e4 | 466 | break; |
73c1f4a0 | 467 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
468 | yes = 0; |
469 | break; | |
73c1f4a0 | 470 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
471 | yes = entry->sport >= op[1].no; |
472 | break; | |
73c1f4a0 | 473 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 474 | yes = entry->sport <= op[1].no; |
1da177e4 | 475 | break; |
73c1f4a0 | 476 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
477 | yes = entry->dport >= op[1].no; |
478 | break; | |
73c1f4a0 | 479 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
480 | yes = entry->dport <= op[1].no; |
481 | break; | |
73c1f4a0 | 482 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
483 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
484 | break; | |
73c1f4a0 | 485 | case INET_DIAG_BC_S_COND: |
a8c2190e | 486 | case INET_DIAG_BC_D_COND: { |
e31c5e0e ED |
487 | const struct inet_diag_hostcond *cond; |
488 | const __be32 *addr; | |
1da177e4 | 489 | |
e31c5e0e | 490 | cond = (const struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 491 | if (cond->port != -1 && |
73c1f4a0 | 492 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
493 | entry->sport : entry->dport)) { |
494 | yes = 0; | |
495 | break; | |
496 | } | |
4e852c02 | 497 | |
73c1f4a0 | 498 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
499 | addr = entry->saddr; |
500 | else | |
501 | addr = entry->daddr; | |
502 | ||
f67caec9 NC |
503 | if (cond->family != AF_UNSPEC && |
504 | cond->family != entry->family) { | |
505 | if (entry->family == AF_INET6 && | |
506 | cond->family == AF_INET) { | |
507 | if (addr[0] == 0 && addr[1] == 0 && | |
508 | addr[2] == htonl(0xffff) && | |
509 | bitstring_match(addr + 3, | |
510 | cond->addr, | |
511 | cond->prefix_len)) | |
512 | break; | |
513 | } | |
514 | yes = 0; | |
515 | break; | |
516 | } | |
517 | ||
518 | if (cond->prefix_len == 0) | |
519 | break; | |
4e852c02 ACM |
520 | if (bitstring_match(addr, cond->addr, |
521 | cond->prefix_len)) | |
1da177e4 | 522 | break; |
1da177e4 LT |
523 | yes = 0; |
524 | break; | |
525 | } | |
526 | } | |
527 | ||
4e852c02 | 528 | if (yes) { |
1da177e4 LT |
529 | len -= op->yes; |
530 | bc += op->yes; | |
531 | } else { | |
532 | len -= op->no; | |
533 | bc += op->no; | |
534 | } | |
535 | } | |
a02cec21 | 536 | return len == 0; |
1da177e4 LT |
537 | } |
538 | ||
a4458343 ED |
539 | /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV) |
540 | */ | |
541 | static void entry_fill_addrs(struct inet_diag_entry *entry, | |
542 | const struct sock *sk) | |
543 | { | |
544 | #if IS_ENABLED(CONFIG_IPV6) | |
545 | if (sk->sk_family == AF_INET6) { | |
546 | entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32; | |
547 | entry->daddr = sk->sk_v6_daddr.s6_addr32; | |
548 | } else | |
549 | #endif | |
550 | { | |
551 | entry->saddr = &sk->sk_rcv_saddr; | |
552 | entry->daddr = &sk->sk_daddr; | |
553 | } | |
554 | } | |
555 | ||
8d07d151 PE |
556 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
557 | { | |
8d07d151 | 558 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e | 559 | struct inet_diag_entry entry; |
8d07d151 | 560 | |
e31c5e0e | 561 | if (!bc) |
8d07d151 PE |
562 | return 1; |
563 | ||
564 | entry.family = sk->sk_family; | |
a4458343 | 565 | entry_fill_addrs(&entry, sk); |
8d07d151 PE |
566 | entry.sport = inet->inet_num; |
567 | entry.dport = ntohs(inet->inet_dport); | |
a58917f5 | 568 | entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0; |
8d07d151 PE |
569 | |
570 | return inet_diag_bc_run(bc, &entry); | |
571 | } | |
572 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
573 | ||
1da177e4 LT |
574 | static int valid_cc(const void *bc, int len, int cc) |
575 | { | |
576 | while (len >= 0) { | |
73c1f4a0 | 577 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
578 | |
579 | if (cc > len) | |
580 | return 0; | |
581 | if (cc == len) | |
582 | return 1; | |
eeb14972 | 583 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
584 | return 0; |
585 | len -= op->yes; | |
586 | bc += op->yes; | |
587 | } | |
588 | return 0; | |
589 | } | |
590 | ||
405c0059 NC |
591 | /* Validate an inet_diag_hostcond. */ |
592 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
593 | int *min_len) | |
594 | { | |
405c0059 | 595 | struct inet_diag_hostcond *cond; |
e31c5e0e | 596 | int addr_len; |
405c0059 NC |
597 | |
598 | /* Check hostcond space. */ | |
599 | *min_len += sizeof(struct inet_diag_hostcond); | |
600 | if (len < *min_len) | |
601 | return false; | |
602 | cond = (struct inet_diag_hostcond *)(op + 1); | |
603 | ||
604 | /* Check address family and address length. */ | |
605 | switch (cond->family) { | |
606 | case AF_UNSPEC: | |
607 | addr_len = 0; | |
608 | break; | |
609 | case AF_INET: | |
610 | addr_len = sizeof(struct in_addr); | |
611 | break; | |
612 | case AF_INET6: | |
613 | addr_len = sizeof(struct in6_addr); | |
614 | break; | |
615 | default: | |
616 | return false; | |
617 | } | |
618 | *min_len += addr_len; | |
619 | if (len < *min_len) | |
620 | return false; | |
621 | ||
622 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
623 | if (cond->prefix_len > 8 * addr_len) | |
624 | return false; | |
625 | ||
626 | return true; | |
627 | } | |
628 | ||
5e1f5420 | 629 | /* Validate a port comparison operator. */ |
e31c5e0e ED |
630 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
631 | int len, int *min_len) | |
5e1f5420 NC |
632 | { |
633 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
634 | *min_len += sizeof(struct inet_diag_bc_op); | |
635 | if (len < *min_len) | |
636 | return false; | |
637 | return true; | |
638 | } | |
639 | ||
73c1f4a0 | 640 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 641 | { |
eeb14972 | 642 | const void *bc = bytecode; |
1da177e4 LT |
643 | int len = bytecode_len; |
644 | ||
645 | while (len > 0) { | |
405c0059 | 646 | int min_len = sizeof(struct inet_diag_bc_op); |
e31c5e0e | 647 | const struct inet_diag_bc_op *op = bc; |
1da177e4 | 648 | |
1da177e4 | 649 | switch (op->code) { |
73c1f4a0 ACM |
650 | case INET_DIAG_BC_S_COND: |
651 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
652 | if (!valid_hostcond(bc, len, &min_len)) |
653 | return -EINVAL; | |
5e1f5420 | 654 | break; |
73c1f4a0 ACM |
655 | case INET_DIAG_BC_S_GE: |
656 | case INET_DIAG_BC_S_LE: | |
657 | case INET_DIAG_BC_D_GE: | |
658 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 659 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
660 | return -EINVAL; |
661 | break; | |
5e1f5420 NC |
662 | case INET_DIAG_BC_AUTO: |
663 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 664 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
665 | break; |
666 | default: | |
667 | return -EINVAL; | |
668 | } | |
5e1f5420 NC |
669 | |
670 | if (op->code != INET_DIAG_BC_NOP) { | |
671 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
672 | return -EINVAL; | |
673 | if (op->no < len && | |
674 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
675 | return -EINVAL; | |
676 | } | |
677 | ||
405c0059 | 678 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 679 | return -EINVAL; |
4e852c02 | 680 | bc += op->yes; |
1da177e4 LT |
681 | len -= op->yes; |
682 | } | |
683 | return len == 0 ? 0 : -EINVAL; | |
684 | } | |
685 | ||
dff2c035 ACM |
686 | static int inet_csk_diag_dump(struct sock *sk, |
687 | struct sk_buff *skb, | |
37f352b5 | 688 | struct netlink_callback *cb, |
34160ea3 | 689 | const struct inet_diag_req_v2 *r, |
37f352b5 | 690 | const struct nlattr *bc) |
1da177e4 | 691 | { |
8d07d151 PE |
692 | if (!inet_diag_bc_sk(bc, sk)) |
693 | return 0; | |
1da177e4 | 694 | |
a029fe26 | 695 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 696 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 697 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 698 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
699 | } |
700 | ||
49612729 ED |
701 | static void twsk_build_assert(void) |
702 | { | |
703 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != | |
704 | offsetof(struct sock, sk_family)); | |
705 | ||
706 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != | |
707 | offsetof(struct inet_sock, inet_num)); | |
708 | ||
709 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != | |
710 | offsetof(struct inet_sock, inet_dport)); | |
711 | ||
712 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != | |
713 | offsetof(struct inet_sock, inet_rcv_saddr)); | |
714 | ||
715 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != | |
716 | offsetof(struct inet_sock, inet_daddr)); | |
717 | ||
718 | #if IS_ENABLED(CONFIG_IPV6) | |
719 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != | |
720 | offsetof(struct sock, sk_v6_rcv_saddr)); | |
721 | ||
722 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != | |
723 | offsetof(struct sock, sk_v6_daddr)); | |
724 | #endif | |
725 | } | |
726 | ||
73c1f4a0 | 727 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 728 | struct netlink_callback *cb, |
34160ea3 | 729 | const struct inet_diag_req_v2 *r, |
37f352b5 | 730 | const struct nlattr *bc) |
1da177e4 | 731 | { |
463c84b9 | 732 | struct inet_connection_sock *icsk = inet_csk(sk); |
1da177e4 | 733 | struct inet_sock *inet = inet_sk(sk); |
e31c5e0e ED |
734 | struct inet_diag_entry entry; |
735 | int j, s_j, reqnum, s_reqnum; | |
736 | struct listen_sock *lopt; | |
1da177e4 LT |
737 | int err = 0; |
738 | ||
739 | s_j = cb->args[3]; | |
740 | s_reqnum = cb->args[4]; | |
741 | ||
742 | if (s_j > 0) | |
743 | s_j--; | |
744 | ||
745 | entry.family = sk->sk_family; | |
746 | ||
b2827053 | 747 | spin_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 748 | |
463c84b9 | 749 | lopt = icsk->icsk_accept_queue.listen_opt; |
fa76ce73 | 750 | if (!lopt || !listen_sock_qlen(lopt)) |
1da177e4 LT |
751 | goto out; |
752 | ||
e31c5e0e | 753 | if (bc) { |
c720c7e8 | 754 | entry.sport = inet->inet_num; |
1da177e4 LT |
755 | entry.userlocks = sk->sk_userlocks; |
756 | } | |
757 | ||
540722ff | 758 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 759 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
760 | |
761 | reqnum = 0; | |
762 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
763 | struct inet_request_sock *ireq = inet_rsk(req); |
764 | ||
1da177e4 LT |
765 | if (reqnum < s_reqnum) |
766 | continue; | |
634fb979 | 767 | if (r->id.idiag_dport != ireq->ir_rmt_port && |
73c1f4a0 | 768 | r->id.idiag_dport) |
1da177e4 LT |
769 | continue; |
770 | ||
771 | if (bc) { | |
a4458343 | 772 | /* Note: entry.sport and entry.userlocks are already set */ |
08d2cc3b | 773 | entry_fill_addrs(&entry, req_to_sk(req)); |
634fb979 | 774 | entry.dport = ntohs(ireq->ir_rmt_port); |
1da177e4 | 775 | |
87c22ea5 | 776 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
777 | continue; |
778 | } | |
779 | ||
08d2cc3b | 780 | err = inet_req_diag_fill(req_to_sk(req), skb, |
e31c5e0e | 781 | NETLINK_CB(cb->skb).portid, |
a58917f5 ED |
782 | cb->nlh->nlmsg_seq, |
783 | NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
784 | if (err < 0) { |
785 | cb->args[3] = j + 1; | |
786 | cb->args[4] = reqnum; | |
787 | goto out; | |
788 | } | |
789 | } | |
790 | ||
791 | s_reqnum = 0; | |
792 | } | |
793 | ||
794 | out: | |
b2827053 | 795 | spin_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
796 | |
797 | return err; | |
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; |
4e852c02 | 806 | |
1da177e4 LT |
807 | s_i = cb->args[1]; |
808 | s_num = num = cb->args[2]; | |
4f5736c4 | 809 | |
1da177e4 | 810 | if (cb->args[0] == 0) { |
73c1f4a0 | 811 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 812 | goto skip_listen_ht; |
540722ff | 813 | |
0f7ff927 | 814 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
5caea4ea | 815 | struct inet_listen_hashbucket *ilb; |
e31c5e0e ED |
816 | struct hlist_nulls_node *node; |
817 | struct sock *sk; | |
1da177e4 LT |
818 | |
819 | num = 0; | |
5caea4ea ED |
820 | ilb = &hashinfo->listening_hash[i]; |
821 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 822 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
823 | struct inet_sock *inet = inet_sk(sk); |
824 | ||
51d7cccf AV |
825 | if (!net_eq(sock_net(sk), net)) |
826 | continue; | |
827 | ||
1da177e4 LT |
828 | if (num < s_num) { |
829 | num++; | |
830 | continue; | |
831 | } | |
832 | ||
d23deaa0 | 833 | if (r->sdiag_family != AF_UNSPEC && |
e31c5e0e | 834 | sk->sk_family != r->sdiag_family) |
d23deaa0 PE |
835 | goto next_listen; |
836 | ||
c720c7e8 | 837 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 838 | r->id.idiag_sport) |
1da177e4 LT |
839 | goto next_listen; |
840 | ||
73c1f4a0 ACM |
841 | if (!(r->idiag_states & TCPF_LISTEN) || |
842 | r->id.idiag_dport || | |
1da177e4 LT |
843 | cb->args[3] > 0) |
844 | goto syn_recv; | |
845 | ||
25c4cd2b | 846 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 847 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
848 | goto done; |
849 | } | |
850 | ||
851 | syn_recv: | |
73c1f4a0 | 852 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
853 | goto next_listen; |
854 | ||
25c4cd2b | 855 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 856 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
857 | goto done; |
858 | } | |
859 | ||
860 | next_listen: | |
861 | cb->args[3] = 0; | |
862 | cb->args[4] = 0; | |
863 | ++num; | |
864 | } | |
5caea4ea | 865 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
866 | |
867 | s_num = 0; | |
868 | cb->args[3] = 0; | |
869 | cb->args[4] = 0; | |
870 | } | |
1da177e4 LT |
871 | skip_listen_ht: |
872 | cb->args[0] = 1; | |
873 | s_i = num = s_num = 0; | |
874 | } | |
875 | ||
73c1f4a0 | 876 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 877 | goto out; |
1da177e4 | 878 | |
f373b53b | 879 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 880 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 881 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
3ab5aee7 | 882 | struct hlist_nulls_node *node; |
e31c5e0e | 883 | struct sock *sk; |
1da177e4 | 884 | |
6be547a6 AK |
885 | num = 0; |
886 | ||
05dbc7b5 | 887 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
888 | continue; |
889 | ||
1da177e4 LT |
890 | if (i > s_i) |
891 | s_num = 0; | |
892 | ||
7e3aab4a | 893 | spin_lock_bh(lock); |
3ab5aee7 | 894 | sk_nulls_for_each(sk, node, &head->chain) { |
e31c5e0e | 895 | int state, res; |
1da177e4 | 896 | |
51d7cccf AV |
897 | if (!net_eq(sock_net(sk), net)) |
898 | continue; | |
1da177e4 LT |
899 | if (num < s_num) |
900 | goto next_normal; | |
70315d22 NC |
901 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
902 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
903 | if (!(r->idiag_states & (1 << state))) | |
1da177e4 | 904 | goto next_normal; |
d23deaa0 | 905 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 906 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 907 | goto next_normal; |
05dbc7b5 | 908 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 909 | r->id.idiag_sport) |
1da177e4 | 910 | goto next_normal; |
05dbc7b5 | 911 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 912 | r->id.idiag_dport) |
1da177e4 | 913 | goto next_normal; |
a58917f5 ED |
914 | twsk_build_assert(); |
915 | ||
916 | if (!inet_diag_bc_sk(bc, sk)) | |
917 | goto next_normal; | |
918 | ||
919 | res = sk_diag_fill(sk, skb, r, | |
920 | sk_user_ns(NETLINK_CB(cb->skb).sk), | |
921 | NETLINK_CB(cb->skb).portid, | |
922 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
923 | cb->nlh); | |
05dbc7b5 | 924 | if (res < 0) { |
7e3aab4a | 925 | spin_unlock_bh(lock); |
1da177e4 LT |
926 | goto done; |
927 | } | |
928 | next_normal: | |
929 | ++num; | |
930 | } | |
931 | ||
7e3aab4a | 932 | spin_unlock_bh(lock); |
1da177e4 LT |
933 | } |
934 | ||
935 | done: | |
936 | cb->args[1] = i; | |
937 | cb->args[2] = num; | |
efb3cb42 PE |
938 | out: |
939 | ; | |
940 | } | |
1942c518 | 941 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
942 | |
943 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
34160ea3 | 944 | const struct inet_diag_req_v2 *r, |
e31c5e0e | 945 | struct nlattr *bc) |
efb3cb42 PE |
946 | { |
947 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 948 | int err = 0; |
efb3cb42 PE |
949 | |
950 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
951 | if (!IS_ERR(handler)) | |
1942c518 | 952 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
953 | else |
954 | err = PTR_ERR(handler); | |
d523a328 | 955 | inet_diag_unlock_handler(handler); |
efb3cb42 | 956 | |
cacb6ba0 | 957 | return err ? : skb->len; |
1da177e4 LT |
958 | } |
959 | ||
25c4cd2b PE |
960 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
961 | { | |
c8991362 | 962 | int hdrlen = sizeof(struct inet_diag_req_v2); |
e31c5e0e | 963 | struct nlattr *bc = NULL; |
25c4cd2b PE |
964 | |
965 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
966 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
967 | ||
d106352d | 968 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
969 | } |
970 | ||
e31c5e0e | 971 | static int inet_diag_type2proto(int type) |
a029fe26 PE |
972 | { |
973 | switch (type) { | |
974 | case TCPDIAG_GETSOCK: | |
975 | return IPPROTO_TCP; | |
976 | case DCCPDIAG_GETSOCK: | |
977 | return IPPROTO_DCCP; | |
978 | default: | |
979 | return 0; | |
980 | } | |
981 | } | |
982 | ||
e31c5e0e ED |
983 | static int inet_diag_dump_compat(struct sk_buff *skb, |
984 | struct netlink_callback *cb) | |
25c4cd2b | 985 | { |
d106352d | 986 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
e31c5e0e | 987 | int hdrlen = sizeof(struct inet_diag_req); |
c8991362 | 988 | struct inet_diag_req_v2 req; |
25c4cd2b | 989 | struct nlattr *bc = NULL; |
25c4cd2b | 990 | |
d23deaa0 | 991 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
992 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
993 | req.idiag_ext = rc->idiag_ext; | |
994 | req.idiag_states = rc->idiag_states; | |
995 | req.id = rc->id; | |
996 | ||
997 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
998 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
999 | ||
1000 | return __inet_diag_dump(skb, cb, &req, bc); | |
1001 | } | |
1002 | ||
fe50ce28 | 1003 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
e31c5e0e | 1004 | const struct nlmsghdr *nlh) |
fe50ce28 | 1005 | { |
d106352d | 1006 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 1007 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
1008 | |
1009 | req.sdiag_family = rc->idiag_family; | |
1010 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
1011 | req.idiag_ext = rc->idiag_ext; | |
1012 | req.idiag_states = rc->idiag_states; | |
1013 | req.id = rc->id; | |
1014 | ||
1015 | return inet_diag_get_exact(in_skb, nlh, &req); | |
1016 | } | |
1017 | ||
8d34172d | 1018 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1019 | { |
3b09c84c | 1020 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 1021 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1022 | |
ead592ba TG |
1023 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
1024 | nlmsg_len(nlh) < hdrlen) | |
1025 | return -EINVAL; | |
1da177e4 | 1026 | |
b8f3ab42 | 1027 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1028 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1029 | struct nlattr *attr; | |
1da177e4 | 1030 | |
ead592ba TG |
1031 | attr = nlmsg_find_attr(nlh, hdrlen, |
1032 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1033 | if (!attr || |
ead592ba TG |
1034 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1035 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1036 | return -EINVAL; | |
1037 | } | |
80d326fa PNA |
1038 | { |
1039 | struct netlink_dump_control c = { | |
1040 | .dump = inet_diag_dump_compat, | |
1041 | }; | |
51d7cccf | 1042 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1043 | } |
1da177e4 | 1044 | } |
ead592ba | 1045 | |
fe50ce28 | 1046 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1047 | } |
1048 | ||
d366477a PE |
1049 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
1050 | { | |
c8991362 | 1051 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1052 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1053 | |
1054 | if (nlmsg_len(h) < hdrlen) | |
1055 | return -EINVAL; | |
1056 | ||
1057 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1058 | if (nlmsg_attrlen(h, hdrlen)) { |
1059 | struct nlattr *attr; | |
e31c5e0e | 1060 | |
25c4cd2b PE |
1061 | attr = nlmsg_find_attr(h, hdrlen, |
1062 | INET_DIAG_REQ_BYTECODE); | |
e31c5e0e | 1063 | if (!attr || |
25c4cd2b PE |
1064 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
1065 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1066 | return -EINVAL; | |
1067 | } | |
80d326fa PNA |
1068 | { |
1069 | struct netlink_dump_control c = { | |
1070 | .dump = inet_diag_dump, | |
1071 | }; | |
51d7cccf | 1072 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1073 | } |
d366477a PE |
1074 | } |
1075 | ||
d106352d | 1076 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
d366477a PE |
1077 | } |
1078 | ||
8dcf01fc | 1079 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a PE |
1080 | .family = AF_INET, |
1081 | .dump = inet_diag_handler_dump, | |
1082 | }; | |
1083 | ||
8dcf01fc | 1084 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a PE |
1085 | .family = AF_INET6, |
1086 | .dump = inet_diag_handler_dump, | |
1087 | }; | |
1088 | ||
4f5736c4 ACM |
1089 | int inet_diag_register(const struct inet_diag_handler *h) |
1090 | { | |
1091 | const __u16 type = h->idiag_type; | |
1092 | int err = -EINVAL; | |
1093 | ||
f13c95f0 | 1094 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1095 | goto out; |
1096 | ||
d523a328 | 1097 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1098 | err = -EEXIST; |
e31c5e0e | 1099 | if (!inet_diag_table[type]) { |
4f5736c4 ACM |
1100 | inet_diag_table[type] = h; |
1101 | err = 0; | |
1102 | } | |
d523a328 | 1103 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1104 | out: |
1105 | return err; | |
1106 | } | |
1107 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1108 | ||
1109 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1110 | { | |
1111 | const __u16 type = h->idiag_type; | |
1112 | ||
f13c95f0 | 1113 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1114 | return; |
1115 | ||
d523a328 | 1116 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1117 | inet_diag_table[type] = NULL; |
d523a328 | 1118 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1119 | } |
1120 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1121 | ||
73c1f4a0 | 1122 | static int __init inet_diag_init(void) |
1da177e4 | 1123 | { |
f13c95f0 | 1124 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1125 | sizeof(struct inet_diag_handler *)); |
1126 | int err = -ENOMEM; | |
1127 | ||
0da974f4 | 1128 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1129 | if (!inet_diag_table) |
1130 | goto out; | |
1131 | ||
d366477a PE |
1132 | err = sock_diag_register(&inet_diag_handler); |
1133 | if (err) | |
1134 | goto out_free_nl; | |
1135 | ||
1136 | err = sock_diag_register(&inet6_diag_handler); | |
1137 | if (err) | |
1138 | goto out_free_inet; | |
1139 | ||
8ef874bf | 1140 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1141 | out: |
1142 | return err; | |
d366477a PE |
1143 | |
1144 | out_free_inet: | |
1145 | sock_diag_unregister(&inet_diag_handler); | |
1146 | out_free_nl: | |
4f5736c4 ACM |
1147 | kfree(inet_diag_table); |
1148 | goto out; | |
1da177e4 LT |
1149 | } |
1150 | ||
73c1f4a0 | 1151 | static void __exit inet_diag_exit(void) |
1da177e4 | 1152 | { |
d366477a PE |
1153 | sock_diag_unregister(&inet6_diag_handler); |
1154 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1155 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1156 | kfree(inet_diag_table); |
1da177e4 LT |
1157 | } |
1158 | ||
73c1f4a0 ACM |
1159 | module_init(inet_diag_init); |
1160 | module_exit(inet_diag_exit); | |
1da177e4 | 1161 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1162 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1163 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |