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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 { |
9f855299 AV |
41 | __be32 *saddr; |
42 | __be32 *daddr; | |
1da177e4 LT |
43 | u16 sport; |
44 | u16 dport; | |
45 | u16 family; | |
46 | u16 userlocks; | |
1c95df85 NC |
47 | #if IS_ENABLED(CONFIG_IPV6) |
48 | struct in6_addr saddr_storage; /* for IPv4-mapped-IPv6 addresses */ | |
49 | struct in6_addr daddr_storage; /* for IPv4-mapped-IPv6 addresses */ | |
50 | #endif | |
1da177e4 LT |
51 | }; |
52 | ||
d523a328 HX |
53 | static DEFINE_MUTEX(inet_diag_table_mutex); |
54 | ||
f13c95f0 | 55 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 56 | { |
f13c95f0 | 57 | if (!inet_diag_table[proto]) |
aec8dc62 PE |
58 | request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK, |
59 | NETLINK_SOCK_DIAG, AF_INET, proto); | |
d523a328 HX |
60 | |
61 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 62 | if (!inet_diag_table[proto]) |
d523a328 HX |
63 | return ERR_PTR(-ENOENT); |
64 | ||
f13c95f0 | 65 | return inet_diag_table[proto]; |
d523a328 HX |
66 | } |
67 | ||
68 | static inline void inet_diag_unlock_handler( | |
69 | const struct inet_diag_handler *handler) | |
70 | { | |
71 | mutex_unlock(&inet_diag_table_mutex); | |
72 | } | |
73 | ||
3c4d05c8 | 74 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
c8991362 | 75 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
d06ca956 | 76 | struct user_namespace *user_ns, |
15e47304 | 77 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 | 78 | const struct nlmsghdr *unlh) |
1da177e4 | 79 | { |
463c84b9 | 80 | const struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 81 | struct inet_diag_msg *r; |
1da177e4 | 82 | struct nlmsghdr *nlh; |
6e277ed5 | 83 | struct nlattr *attr; |
4f5736c4 | 84 | void *info = NULL; |
4f5736c4 | 85 | const struct inet_diag_handler *handler; |
a029fe26 | 86 | int ext = req->idiag_ext; |
4f5736c4 | 87 | |
a029fe26 | 88 | handler = inet_diag_table[req->sdiag_protocol]; |
4f5736c4 | 89 | BUG_ON(handler == NULL); |
1da177e4 | 90 | |
15e47304 | 91 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
92 | nlmsg_flags); |
93 | if (!nlh) | |
d106352d | 94 | return -EMSGSIZE; |
4f5736c4 | 95 | |
d106352d | 96 | r = nlmsg_data(nlh); |
c7d58aab ACM |
97 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
98 | ||
73c1f4a0 ACM |
99 | r->idiag_family = sk->sk_family; |
100 | r->idiag_state = sk->sk_state; | |
101 | r->idiag_timer = 0; | |
102 | r->idiag_retrans = 0; | |
1da177e4 | 103 | |
73c1f4a0 | 104 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 105 | sock_diag_save_cookie(sk, r->id.idiag_cookie); |
1da177e4 | 106 | |
c720c7e8 ED |
107 | r->id.idiag_sport = inet->inet_sport; |
108 | r->id.idiag_dport = inet->inet_dport; | |
109 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
110 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 111 | |
e4e541a8 PE |
112 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) |
113 | goto errout; | |
114 | ||
717b6d83 MŻ |
115 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
116 | * hence this needs to be included regardless of socket family. | |
117 | */ | |
118 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
6e277ed5 TG |
119 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
120 | goto errout; | |
717b6d83 | 121 | |
dfd56b8b | 122 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 123 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 124 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 125 | |
4e3fd7a0 AD |
126 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
127 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
6e277ed5 | 128 | |
06236ac3 | 129 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
6e277ed5 TG |
130 | if (nla_put_u8(skb, INET_DIAG_TCLASS, np->tclass) < 0) |
131 | goto errout; | |
1da177e4 LT |
132 | } |
133 | #endif | |
134 | ||
d06ca956 | 135 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
3c4d05c8 PE |
136 | r->idiag_inode = sock_i_ino(sk); |
137 | ||
6e277ed5 TG |
138 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
139 | struct inet_diag_meminfo minfo = { | |
140 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
141 | .idiag_wmem = sk->sk_wmem_queued, | |
142 | .idiag_fmem = sk->sk_forward_alloc, | |
143 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
144 | }; | |
145 | ||
146 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
147 | goto errout; | |
3c4d05c8 PE |
148 | } |
149 | ||
c0636faa PE |
150 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
151 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 152 | goto errout; |
c0636faa | 153 | |
3c4d05c8 | 154 | if (icsk == NULL) { |
62ad6fcd | 155 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
156 | goto out; |
157 | } | |
158 | ||
172589cc | 159 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 160 | |
6ba8a3b1 ND |
161 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
162 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || | |
163 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { | |
73c1f4a0 ACM |
164 | r->idiag_timer = 1; |
165 | r->idiag_retrans = icsk->icsk_retransmits; | |
166 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 167 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
168 | r->idiag_timer = 4; |
169 | r->idiag_retrans = icsk->icsk_probes_out; | |
170 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 171 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
172 | r->idiag_timer = 2; |
173 | r->idiag_retrans = icsk->icsk_probes_out; | |
174 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 175 | } else { |
73c1f4a0 ACM |
176 | r->idiag_timer = 0; |
177 | r->idiag_expires = 0; | |
1da177e4 LT |
178 | } |
179 | #undef EXPIRES_IN_MS | |
540722ff | 180 | |
6e277ed5 TG |
181 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
182 | attr = nla_reserve(skb, INET_DIAG_INFO, | |
183 | sizeof(struct tcp_info)); | |
184 | if (!attr) | |
185 | goto errout; | |
3c4d05c8 | 186 | |
6e277ed5 | 187 | info = nla_data(attr); |
1da177e4 LT |
188 | } |
189 | ||
6e277ed5 TG |
190 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
191 | if (nla_put_string(skb, INET_DIAG_CONG, | |
192 | icsk->icsk_ca_ops->name) < 0) | |
193 | goto errout; | |
194 | ||
4f5736c4 | 195 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 196 | |
6687e988 ACM |
197 | if (sk->sk_state < TCP_TIME_WAIT && |
198 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
199 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 200 | |
3c4d05c8 | 201 | out: |
6e277ed5 | 202 | return nlmsg_end(skb, nlh); |
1da177e4 | 203 | |
6e277ed5 TG |
204 | errout: |
205 | nlmsg_cancel(skb, nlh); | |
26932566 | 206 | return -EMSGSIZE; |
1da177e4 | 207 | } |
3c4d05c8 PE |
208 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
209 | ||
210 | static int inet_csk_diag_fill(struct sock *sk, | |
c8991362 | 211 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
d06ca956 | 212 | struct user_namespace *user_ns, |
15e47304 | 213 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
214 | const struct nlmsghdr *unlh) |
215 | { | |
216 | return inet_sk_diag_fill(sk, inet_csk(sk), | |
15e47304 | 217 | skb, req, user_ns, portid, seq, nlmsg_flags, unlh); |
3c4d05c8 | 218 | } |
1da177e4 | 219 | |
c7d58aab | 220 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
c8991362 | 221 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
15e47304 | 222 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
223 | const struct nlmsghdr *unlh) |
224 | { | |
96f817fe | 225 | s32 tmo; |
c7d58aab | 226 | struct inet_diag_msg *r; |
6e277ed5 | 227 | struct nlmsghdr *nlh; |
d106352d | 228 | |
15e47304 | 229 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
230 | nlmsg_flags); |
231 | if (!nlh) | |
d106352d | 232 | return -EMSGSIZE; |
c7d58aab | 233 | |
d106352d | 234 | r = nlmsg_data(nlh); |
c7d58aab ACM |
235 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
236 | ||
96f817fe | 237 | tmo = tw->tw_ttd - inet_tw_time_stamp(); |
c7d58aab ACM |
238 | if (tmo < 0) |
239 | tmo = 0; | |
240 | ||
241 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
242 | r->idiag_retrans = 0; |
243 | r->id.idiag_if = tw->tw_bound_dev_if; | |
f65c1b53 | 244 | sock_diag_save_cookie(tw, r->id.idiag_cookie); |
c7d58aab ACM |
245 | r->id.idiag_sport = tw->tw_sport; |
246 | r->id.idiag_dport = tw->tw_dport; | |
247 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
248 | r->id.idiag_dst[0] = tw->tw_daddr; | |
249 | r->idiag_state = tw->tw_substate; | |
250 | r->idiag_timer = 3; | |
96f817fe | 251 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
252 | r->idiag_rqueue = 0; |
253 | r->idiag_wqueue = 0; | |
254 | r->idiag_uid = 0; | |
255 | r->idiag_inode = 0; | |
dfd56b8b | 256 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
257 | if (tw->tw_family == AF_INET6) { |
258 | const struct inet6_timewait_sock *tw6 = | |
259 | inet6_twsk((struct sock *)tw); | |
260 | ||
4e3fd7a0 AD |
261 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
262 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
263 | } |
264 | #endif | |
6e277ed5 TG |
265 | |
266 | return nlmsg_end(skb, nlh); | |
c7d58aab ACM |
267 | } |
268 | ||
dff2c035 | 269 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
d06ca956 EB |
270 | struct inet_diag_req_v2 *r, |
271 | struct user_namespace *user_ns, | |
15e47304 | 272 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
273 | const struct nlmsghdr *unlh) |
274 | { | |
275 | if (sk->sk_state == TCP_TIME_WAIT) | |
276 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
15e47304 | 277 | skb, r, portid, seq, nlmsg_flags, |
dff2c035 | 278 | unlh); |
15e47304 | 279 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, nlmsg_flags, unlh); |
dff2c035 ACM |
280 | } |
281 | ||
1942c518 | 282 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
c8991362 | 283 | const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req) |
1da177e4 LT |
284 | { |
285 | int err; | |
286 | struct sock *sk; | |
1da177e4 | 287 | struct sk_buff *rep; |
51d7cccf | 288 | struct net *net = sock_net(in_skb->sk); |
d523a328 | 289 | |
d523a328 | 290 | err = -EINVAL; |
fe50ce28 | 291 | if (req->sdiag_family == AF_INET) { |
51d7cccf | 292 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
293 | req->id.idiag_dport, req->id.idiag_src[0], |
294 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 295 | } |
dfd56b8b | 296 | #if IS_ENABLED(CONFIG_IPV6) |
fe50ce28 | 297 | else if (req->sdiag_family == AF_INET6) { |
51d7cccf | 298 | sk = inet6_lookup(net, hashinfo, |
73c1f4a0 ACM |
299 | (struct in6_addr *)req->id.idiag_dst, |
300 | req->id.idiag_dport, | |
301 | (struct in6_addr *)req->id.idiag_src, | |
302 | req->id.idiag_sport, | |
303 | req->id.idiag_if); | |
1da177e4 LT |
304 | } |
305 | #endif | |
306 | else { | |
476f7dbf | 307 | goto out_nosk; |
1da177e4 LT |
308 | } |
309 | ||
d523a328 | 310 | err = -ENOENT; |
1da177e4 | 311 | if (sk == NULL) |
476f7dbf | 312 | goto out_nosk; |
1da177e4 | 313 | |
f65c1b53 | 314 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 315 | if (err) |
1da177e4 LT |
316 | goto out; |
317 | ||
6e277ed5 TG |
318 | rep = nlmsg_new(sizeof(struct inet_diag_msg) + |
319 | sizeof(struct inet_diag_meminfo) + | |
320 | sizeof(struct tcp_info) + 64, GFP_KERNEL); | |
321 | if (!rep) { | |
322 | err = -ENOMEM; | |
1da177e4 | 323 | goto out; |
6e277ed5 | 324 | } |
1da177e4 | 325 | |
a029fe26 | 326 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 327 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 328 | NETLINK_CB(in_skb).portid, |
26932566 PM |
329 | nlh->nlmsg_seq, 0, nlh); |
330 | if (err < 0) { | |
331 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 332 | nlmsg_free(rep); |
26932566 PM |
333 | goto out; |
334 | } | |
15e47304 | 335 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 336 | MSG_DONTWAIT); |
1da177e4 LT |
337 | if (err > 0) |
338 | err = 0; | |
339 | ||
340 | out: | |
341 | if (sk) { | |
342 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 343 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
344 | else |
345 | sock_put(sk); | |
346 | } | |
476f7dbf PE |
347 | out_nosk: |
348 | return err; | |
349 | } | |
1942c518 | 350 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
351 | |
352 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
353 | const struct nlmsghdr *nlh, | |
c8991362 | 354 | struct inet_diag_req_v2 *req) |
476f7dbf PE |
355 | { |
356 | const struct inet_diag_handler *handler; | |
357 | int err; | |
358 | ||
359 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
360 | if (IS_ERR(handler)) | |
361 | err = PTR_ERR(handler); | |
362 | else | |
1942c518 | 363 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 364 | inet_diag_unlock_handler(handler); |
476f7dbf | 365 | |
1da177e4 LT |
366 | return err; |
367 | } | |
368 | ||
9f855299 | 369 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
370 | { |
371 | int words = bits >> 5; | |
372 | ||
373 | bits &= 0x1f; | |
374 | ||
375 | if (words) { | |
376 | if (memcmp(a1, a2, words << 2)) | |
377 | return 0; | |
378 | } | |
379 | if (bits) { | |
9f855299 AV |
380 | __be32 w1, w2; |
381 | __be32 mask; | |
1da177e4 LT |
382 | |
383 | w1 = a1[words]; | |
384 | w2 = a2[words]; | |
385 | ||
386 | mask = htonl((0xffffffff) << (32 - bits)); | |
387 | ||
388 | if ((w1 ^ w2) & mask) | |
389 | return 0; | |
390 | } | |
391 | ||
392 | return 1; | |
393 | } | |
394 | ||
395 | ||
87c22ea5 PE |
396 | static int inet_diag_bc_run(const struct nlattr *_bc, |
397 | const struct inet_diag_entry *entry) | |
1da177e4 | 398 | { |
87c22ea5 PE |
399 | const void *bc = nla_data(_bc); |
400 | int len = nla_len(_bc); | |
401 | ||
1da177e4 LT |
402 | while (len > 0) { |
403 | int yes = 1; | |
73c1f4a0 | 404 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
405 | |
406 | switch (op->code) { | |
73c1f4a0 | 407 | case INET_DIAG_BC_NOP: |
1da177e4 | 408 | break; |
73c1f4a0 | 409 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
410 | yes = 0; |
411 | break; | |
73c1f4a0 | 412 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
413 | yes = entry->sport >= op[1].no; |
414 | break; | |
73c1f4a0 | 415 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 416 | yes = entry->sport <= op[1].no; |
1da177e4 | 417 | break; |
73c1f4a0 | 418 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
419 | yes = entry->dport >= op[1].no; |
420 | break; | |
73c1f4a0 | 421 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
422 | yes = entry->dport <= op[1].no; |
423 | break; | |
73c1f4a0 | 424 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
425 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
426 | break; | |
73c1f4a0 | 427 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
428 | case INET_DIAG_BC_D_COND: { |
429 | struct inet_diag_hostcond *cond; | |
9f855299 | 430 | __be32 *addr; |
1da177e4 | 431 | |
a8c2190e | 432 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 433 | if (cond->port != -1 && |
73c1f4a0 | 434 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
435 | entry->sport : entry->dport)) { |
436 | yes = 0; | |
437 | break; | |
438 | } | |
4e852c02 | 439 | |
73c1f4a0 | 440 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
441 | addr = entry->saddr; |
442 | else | |
443 | addr = entry->daddr; | |
444 | ||
f67caec9 NC |
445 | if (cond->family != AF_UNSPEC && |
446 | cond->family != entry->family) { | |
447 | if (entry->family == AF_INET6 && | |
448 | cond->family == AF_INET) { | |
449 | if (addr[0] == 0 && addr[1] == 0 && | |
450 | addr[2] == htonl(0xffff) && | |
451 | bitstring_match(addr + 3, | |
452 | cond->addr, | |
453 | cond->prefix_len)) | |
454 | break; | |
455 | } | |
456 | yes = 0; | |
457 | break; | |
458 | } | |
459 | ||
460 | if (cond->prefix_len == 0) | |
461 | break; | |
4e852c02 ACM |
462 | if (bitstring_match(addr, cond->addr, |
463 | cond->prefix_len)) | |
1da177e4 | 464 | break; |
1da177e4 LT |
465 | yes = 0; |
466 | break; | |
467 | } | |
468 | } | |
469 | ||
4e852c02 | 470 | if (yes) { |
1da177e4 LT |
471 | len -= op->yes; |
472 | bc += op->yes; | |
473 | } else { | |
474 | len -= op->no; | |
475 | bc += op->no; | |
476 | } | |
477 | } | |
a02cec21 | 478 | return len == 0; |
1da177e4 LT |
479 | } |
480 | ||
8d07d151 PE |
481 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
482 | { | |
483 | struct inet_diag_entry entry; | |
484 | struct inet_sock *inet = inet_sk(sk); | |
485 | ||
486 | if (bc == NULL) | |
487 | return 1; | |
488 | ||
489 | entry.family = sk->sk_family; | |
dfd56b8b | 490 | #if IS_ENABLED(CONFIG_IPV6) |
8d07d151 PE |
491 | if (entry.family == AF_INET6) { |
492 | struct ipv6_pinfo *np = inet6_sk(sk); | |
493 | ||
494 | entry.saddr = np->rcv_saddr.s6_addr32; | |
495 | entry.daddr = np->daddr.s6_addr32; | |
496 | } else | |
497 | #endif | |
498 | { | |
499 | entry.saddr = &inet->inet_rcv_saddr; | |
500 | entry.daddr = &inet->inet_daddr; | |
501 | } | |
502 | entry.sport = inet->inet_num; | |
503 | entry.dport = ntohs(inet->inet_dport); | |
504 | entry.userlocks = sk->sk_userlocks; | |
505 | ||
506 | return inet_diag_bc_run(bc, &entry); | |
507 | } | |
508 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
509 | ||
1da177e4 LT |
510 | static int valid_cc(const void *bc, int len, int cc) |
511 | { | |
512 | while (len >= 0) { | |
73c1f4a0 | 513 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
514 | |
515 | if (cc > len) | |
516 | return 0; | |
517 | if (cc == len) | |
518 | return 1; | |
eeb14972 | 519 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
520 | return 0; |
521 | len -= op->yes; | |
522 | bc += op->yes; | |
523 | } | |
524 | return 0; | |
525 | } | |
526 | ||
405c0059 NC |
527 | /* Validate an inet_diag_hostcond. */ |
528 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
529 | int *min_len) | |
530 | { | |
531 | int addr_len; | |
532 | struct inet_diag_hostcond *cond; | |
533 | ||
534 | /* Check hostcond space. */ | |
535 | *min_len += sizeof(struct inet_diag_hostcond); | |
536 | if (len < *min_len) | |
537 | return false; | |
538 | cond = (struct inet_diag_hostcond *)(op + 1); | |
539 | ||
540 | /* Check address family and address length. */ | |
541 | switch (cond->family) { | |
542 | case AF_UNSPEC: | |
543 | addr_len = 0; | |
544 | break; | |
545 | case AF_INET: | |
546 | addr_len = sizeof(struct in_addr); | |
547 | break; | |
548 | case AF_INET6: | |
549 | addr_len = sizeof(struct in6_addr); | |
550 | break; | |
551 | default: | |
552 | return false; | |
553 | } | |
554 | *min_len += addr_len; | |
555 | if (len < *min_len) | |
556 | return false; | |
557 | ||
558 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
559 | if (cond->prefix_len > 8 * addr_len) | |
560 | return false; | |
561 | ||
562 | return true; | |
563 | } | |
564 | ||
5e1f5420 NC |
565 | /* Validate a port comparison operator. */ |
566 | static inline bool valid_port_comparison(const struct inet_diag_bc_op *op, | |
567 | int len, int *min_len) | |
568 | { | |
569 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
570 | *min_len += sizeof(struct inet_diag_bc_op); | |
571 | if (len < *min_len) | |
572 | return false; | |
573 | return true; | |
574 | } | |
575 | ||
73c1f4a0 | 576 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 577 | { |
eeb14972 | 578 | const void *bc = bytecode; |
1da177e4 LT |
579 | int len = bytecode_len; |
580 | ||
581 | while (len > 0) { | |
eeb14972 | 582 | const struct inet_diag_bc_op *op = bc; |
405c0059 | 583 | int min_len = sizeof(struct inet_diag_bc_op); |
1da177e4 LT |
584 | |
585 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
586 | switch (op->code) { | |
73c1f4a0 ACM |
587 | case INET_DIAG_BC_S_COND: |
588 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
589 | if (!valid_hostcond(bc, len, &min_len)) |
590 | return -EINVAL; | |
5e1f5420 | 591 | break; |
73c1f4a0 ACM |
592 | case INET_DIAG_BC_S_GE: |
593 | case INET_DIAG_BC_S_LE: | |
594 | case INET_DIAG_BC_D_GE: | |
595 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 596 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
597 | return -EINVAL; |
598 | break; | |
5e1f5420 NC |
599 | case INET_DIAG_BC_AUTO: |
600 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 601 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
602 | break; |
603 | default: | |
604 | return -EINVAL; | |
605 | } | |
5e1f5420 NC |
606 | |
607 | if (op->code != INET_DIAG_BC_NOP) { | |
608 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
609 | return -EINVAL; | |
610 | if (op->no < len && | |
611 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
612 | return -EINVAL; | |
613 | } | |
614 | ||
405c0059 | 615 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 616 | return -EINVAL; |
4e852c02 | 617 | bc += op->yes; |
1da177e4 LT |
618 | len -= op->yes; |
619 | } | |
620 | return len == 0 ? 0 : -EINVAL; | |
621 | } | |
622 | ||
dff2c035 ACM |
623 | static int inet_csk_diag_dump(struct sock *sk, |
624 | struct sk_buff *skb, | |
37f352b5 | 625 | struct netlink_callback *cb, |
c8991362 | 626 | struct inet_diag_req_v2 *r, |
37f352b5 | 627 | const struct nlattr *bc) |
1da177e4 | 628 | { |
8d07d151 PE |
629 | if (!inet_diag_bc_sk(bc, sk)) |
630 | return 0; | |
1da177e4 | 631 | |
a029fe26 | 632 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 633 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 634 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 635 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
636 | } |
637 | ||
05dbc7b5 | 638 | static int inet_twsk_diag_dump(struct sock *sk, |
c7d58aab | 639 | struct sk_buff *skb, |
37f352b5 | 640 | struct netlink_callback *cb, |
c8991362 | 641 | struct inet_diag_req_v2 *r, |
37f352b5 | 642 | const struct nlattr *bc) |
c7d58aab | 643 | { |
05dbc7b5 ED |
644 | struct inet_timewait_sock *tw = inet_twsk(sk); |
645 | ||
37f352b5 | 646 | if (bc != NULL) { |
c7d58aab | 647 | struct inet_diag_entry entry; |
c7d58aab ACM |
648 | |
649 | entry.family = tw->tw_family; | |
dfd56b8b | 650 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
651 | if (tw->tw_family == AF_INET6) { |
652 | struct inet6_timewait_sock *tw6 = | |
653 | inet6_twsk((struct sock *)tw); | |
654 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
655 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
656 | } else | |
657 | #endif | |
658 | { | |
659 | entry.saddr = &tw->tw_rcv_saddr; | |
660 | entry.daddr = &tw->tw_daddr; | |
661 | } | |
662 | entry.sport = tw->tw_num; | |
663 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 664 | entry.userlocks = 0; |
c7d58aab | 665 | |
87c22ea5 | 666 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
667 | return 0; |
668 | } | |
669 | ||
a029fe26 | 670 | return inet_twsk_diag_fill(tw, skb, r, |
15e47304 | 671 | NETLINK_CB(cb->skb).portid, |
c7d58aab ACM |
672 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
673 | } | |
674 | ||
1c95df85 NC |
675 | /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses |
676 | * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6. | |
677 | */ | |
678 | static inline void inet_diag_req_addrs(const struct sock *sk, | |
679 | const struct request_sock *req, | |
680 | struct inet_diag_entry *entry) | |
681 | { | |
682 | struct inet_request_sock *ireq = inet_rsk(req); | |
683 | ||
684 | #if IS_ENABLED(CONFIG_IPV6) | |
685 | if (sk->sk_family == AF_INET6) { | |
686 | if (req->rsk_ops->family == AF_INET6) { | |
687 | entry->saddr = inet6_rsk(req)->loc_addr.s6_addr32; | |
688 | entry->daddr = inet6_rsk(req)->rmt_addr.s6_addr32; | |
689 | } else if (req->rsk_ops->family == AF_INET) { | |
690 | ipv6_addr_set_v4mapped(ireq->loc_addr, | |
691 | &entry->saddr_storage); | |
692 | ipv6_addr_set_v4mapped(ireq->rmt_addr, | |
693 | &entry->daddr_storage); | |
694 | entry->saddr = entry->saddr_storage.s6_addr32; | |
695 | entry->daddr = entry->daddr_storage.s6_addr32; | |
696 | } | |
697 | } else | |
698 | #endif | |
699 | { | |
700 | entry->saddr = &ireq->loc_addr; | |
701 | entry->daddr = &ireq->rmt_addr; | |
702 | } | |
703 | } | |
704 | ||
73c1f4a0 | 705 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
d06ca956 EB |
706 | struct request_sock *req, |
707 | struct user_namespace *user_ns, | |
15e47304 | 708 | u32 portid, u32 seq, |
4e852c02 | 709 | const struct nlmsghdr *unlh) |
1da177e4 | 710 | { |
2e6599cb | 711 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 712 | struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 713 | struct inet_diag_msg *r; |
1da177e4 LT |
714 | struct nlmsghdr *nlh; |
715 | long tmo; | |
716 | ||
15e47304 | 717 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
718 | NLM_F_MULTI); |
719 | if (!nlh) | |
720 | return -EMSGSIZE; | |
1da177e4 | 721 | |
6e277ed5 | 722 | r = nlmsg_data(nlh); |
73c1f4a0 ACM |
723 | r->idiag_family = sk->sk_family; |
724 | r->idiag_state = TCP_SYN_RECV; | |
725 | r->idiag_timer = 1; | |
e6c022a4 | 726 | r->idiag_retrans = req->num_retrans; |
1da177e4 | 727 | |
73c1f4a0 | 728 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 729 | sock_diag_save_cookie(req, r->id.idiag_cookie); |
1da177e4 LT |
730 | |
731 | tmo = req->expires - jiffies; | |
732 | if (tmo < 0) | |
733 | tmo = 0; | |
734 | ||
c720c7e8 | 735 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
736 | r->id.idiag_dport = ireq->rmt_port; |
737 | r->id.idiag_src[0] = ireq->loc_addr; | |
738 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
739 | r->idiag_expires = jiffies_to_msecs(tmo); | |
740 | r->idiag_rqueue = 0; | |
741 | r->idiag_wqueue = 0; | |
d06ca956 | 742 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
73c1f4a0 | 743 | r->idiag_inode = 0; |
dfd56b8b | 744 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 745 | if (r->idiag_family == AF_INET6) { |
1c95df85 NC |
746 | struct inet_diag_entry entry; |
747 | inet_diag_req_addrs(sk, req, &entry); | |
748 | memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr)); | |
749 | memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr)); | |
1da177e4 LT |
750 | } |
751 | #endif | |
1da177e4 | 752 | |
6e277ed5 | 753 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
754 | } |
755 | ||
73c1f4a0 | 756 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 757 | struct netlink_callback *cb, |
c8991362 | 758 | struct inet_diag_req_v2 *r, |
37f352b5 | 759 | const struct nlattr *bc) |
1da177e4 | 760 | { |
73c1f4a0 | 761 | struct inet_diag_entry entry; |
463c84b9 | 762 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 763 | struct listen_sock *lopt; |
1da177e4 LT |
764 | struct inet_sock *inet = inet_sk(sk); |
765 | int j, s_j; | |
766 | int reqnum, s_reqnum; | |
767 | int err = 0; | |
768 | ||
769 | s_j = cb->args[3]; | |
770 | s_reqnum = cb->args[4]; | |
771 | ||
772 | if (s_j > 0) | |
773 | s_j--; | |
774 | ||
775 | entry.family = sk->sk_family; | |
776 | ||
463c84b9 | 777 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 778 | |
463c84b9 | 779 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
780 | if (!lopt || !lopt->qlen) |
781 | goto out; | |
782 | ||
37f352b5 | 783 | if (bc != NULL) { |
c720c7e8 | 784 | entry.sport = inet->inet_num; |
1da177e4 LT |
785 | entry.userlocks = sk->sk_userlocks; |
786 | } | |
787 | ||
540722ff | 788 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 789 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
790 | |
791 | reqnum = 0; | |
792 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
793 | struct inet_request_sock *ireq = inet_rsk(req); |
794 | ||
1da177e4 LT |
795 | if (reqnum < s_reqnum) |
796 | continue; | |
73c1f4a0 ACM |
797 | if (r->id.idiag_dport != ireq->rmt_port && |
798 | r->id.idiag_dport) | |
1da177e4 LT |
799 | continue; |
800 | ||
801 | if (bc) { | |
1c95df85 | 802 | inet_diag_req_addrs(sk, req, &entry); |
2e6599cb | 803 | entry.dport = ntohs(ireq->rmt_port); |
1da177e4 | 804 | |
87c22ea5 | 805 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
806 | continue; |
807 | } | |
808 | ||
73c1f4a0 | 809 | err = inet_diag_fill_req(skb, sk, req, |
e32123e5 | 810 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 811 | NETLINK_CB(cb->skb).portid, |
540722ff | 812 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
813 | if (err < 0) { |
814 | cb->args[3] = j + 1; | |
815 | cb->args[4] = reqnum; | |
816 | goto out; | |
817 | } | |
818 | } | |
819 | ||
820 | s_reqnum = 0; | |
821 | } | |
822 | ||
823 | out: | |
463c84b9 | 824 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
825 | |
826 | return err; | |
827 | } | |
828 | ||
1942c518 | 829 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
c8991362 | 830 | struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 LT |
831 | { |
832 | int i, num; | |
833 | int s_i, s_num; | |
51d7cccf | 834 | struct net *net = sock_net(skb->sk); |
4e852c02 | 835 | |
1da177e4 LT |
836 | s_i = cb->args[1]; |
837 | s_num = num = cb->args[2]; | |
4f5736c4 | 838 | |
1da177e4 | 839 | if (cb->args[0] == 0) { |
73c1f4a0 | 840 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 841 | goto skip_listen_ht; |
540722ff | 842 | |
0f7ff927 | 843 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 844 | struct sock *sk; |
c25eb3bf | 845 | struct hlist_nulls_node *node; |
5caea4ea | 846 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
847 | |
848 | num = 0; | |
5caea4ea ED |
849 | ilb = &hashinfo->listening_hash[i]; |
850 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 851 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
852 | struct inet_sock *inet = inet_sk(sk); |
853 | ||
51d7cccf AV |
854 | if (!net_eq(sock_net(sk), net)) |
855 | continue; | |
856 | ||
1da177e4 LT |
857 | if (num < s_num) { |
858 | num++; | |
859 | continue; | |
860 | } | |
861 | ||
d23deaa0 PE |
862 | if (r->sdiag_family != AF_UNSPEC && |
863 | sk->sk_family != r->sdiag_family) | |
864 | goto next_listen; | |
865 | ||
c720c7e8 | 866 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 867 | r->id.idiag_sport) |
1da177e4 LT |
868 | goto next_listen; |
869 | ||
73c1f4a0 ACM |
870 | if (!(r->idiag_states & TCPF_LISTEN) || |
871 | r->id.idiag_dport || | |
1da177e4 LT |
872 | cb->args[3] > 0) |
873 | goto syn_recv; | |
874 | ||
25c4cd2b | 875 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 876 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
877 | goto done; |
878 | } | |
879 | ||
880 | syn_recv: | |
73c1f4a0 | 881 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
882 | goto next_listen; |
883 | ||
25c4cd2b | 884 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 885 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
886 | goto done; |
887 | } | |
888 | ||
889 | next_listen: | |
890 | cb->args[3] = 0; | |
891 | cb->args[4] = 0; | |
892 | ++num; | |
893 | } | |
5caea4ea | 894 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
895 | |
896 | s_num = 0; | |
897 | cb->args[3] = 0; | |
898 | cb->args[4] = 0; | |
899 | } | |
1da177e4 LT |
900 | skip_listen_ht: |
901 | cb->args[0] = 1; | |
902 | s_i = num = s_num = 0; | |
903 | } | |
904 | ||
73c1f4a0 | 905 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 906 | goto out; |
1da177e4 | 907 | |
f373b53b | 908 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 909 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 910 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 911 | struct sock *sk; |
3ab5aee7 | 912 | struct hlist_nulls_node *node; |
1da177e4 | 913 | |
6be547a6 AK |
914 | num = 0; |
915 | ||
05dbc7b5 | 916 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
917 | continue; |
918 | ||
1da177e4 LT |
919 | if (i > s_i) |
920 | s_num = 0; | |
921 | ||
7e3aab4a | 922 | spin_lock_bh(lock); |
3ab5aee7 | 923 | sk_nulls_for_each(sk, node, &head->chain) { |
05dbc7b5 | 924 | int res; |
1da177e4 | 925 | |
51d7cccf AV |
926 | if (!net_eq(sock_net(sk), net)) |
927 | continue; | |
1da177e4 LT |
928 | if (num < s_num) |
929 | goto next_normal; | |
73c1f4a0 | 930 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 931 | goto next_normal; |
d23deaa0 | 932 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 933 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 934 | goto next_normal; |
05dbc7b5 | 935 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 936 | r->id.idiag_sport) |
1da177e4 | 937 | goto next_normal; |
05dbc7b5 | 938 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 939 | r->id.idiag_dport) |
1da177e4 | 940 | goto next_normal; |
05dbc7b5 ED |
941 | if (sk->sk_state == TCP_TIME_WAIT) |
942 | res = inet_twsk_diag_dump(sk, skb, cb, r, bc); | |
943 | else | |
944 | res = inet_csk_diag_dump(sk, skb, cb, r, bc); | |
945 | if (res < 0) { | |
7e3aab4a | 946 | spin_unlock_bh(lock); |
1da177e4 LT |
947 | goto done; |
948 | } | |
949 | next_normal: | |
950 | ++num; | |
951 | } | |
952 | ||
7e3aab4a | 953 | spin_unlock_bh(lock); |
1da177e4 LT |
954 | } |
955 | ||
956 | done: | |
957 | cb->args[1] = i; | |
958 | cb->args[2] = num; | |
efb3cb42 PE |
959 | out: |
960 | ; | |
961 | } | |
1942c518 | 962 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
963 | |
964 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
c8991362 | 965 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
efb3cb42 PE |
966 | { |
967 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 968 | int err = 0; |
efb3cb42 PE |
969 | |
970 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
971 | if (!IS_ERR(handler)) | |
1942c518 | 972 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
973 | else |
974 | err = PTR_ERR(handler); | |
d523a328 | 975 | inet_diag_unlock_handler(handler); |
efb3cb42 | 976 | |
cacb6ba0 | 977 | return err ? : skb->len; |
1da177e4 LT |
978 | } |
979 | ||
25c4cd2b PE |
980 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
981 | { | |
982 | struct nlattr *bc = NULL; | |
c8991362 | 983 | int hdrlen = sizeof(struct inet_diag_req_v2); |
25c4cd2b PE |
984 | |
985 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
986 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
987 | ||
d106352d | 988 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
989 | } |
990 | ||
a029fe26 PE |
991 | static inline int inet_diag_type2proto(int type) |
992 | { | |
993 | switch (type) { | |
994 | case TCPDIAG_GETSOCK: | |
995 | return IPPROTO_TCP; | |
996 | case DCCPDIAG_GETSOCK: | |
997 | return IPPROTO_DCCP; | |
998 | default: | |
999 | return 0; | |
1000 | } | |
1001 | } | |
1002 | ||
25c4cd2b PE |
1003 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
1004 | { | |
d106352d | 1005 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
c8991362 | 1006 | struct inet_diag_req_v2 req; |
25c4cd2b | 1007 | struct nlattr *bc = NULL; |
3b09c84c | 1008 | int hdrlen = sizeof(struct inet_diag_req); |
25c4cd2b | 1009 | |
d23deaa0 | 1010 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
1011 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
1012 | req.idiag_ext = rc->idiag_ext; | |
1013 | req.idiag_states = rc->idiag_states; | |
1014 | req.id = rc->id; | |
1015 | ||
1016 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1017 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1018 | ||
1019 | return __inet_diag_dump(skb, cb, &req, bc); | |
1020 | } | |
1021 | ||
fe50ce28 PE |
1022 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
1023 | const struct nlmsghdr *nlh) | |
1024 | { | |
d106352d | 1025 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 1026 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
1027 | |
1028 | req.sdiag_family = rc->idiag_family; | |
1029 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
1030 | req.idiag_ext = rc->idiag_ext; | |
1031 | req.idiag_states = rc->idiag_states; | |
1032 | req.id = rc->id; | |
1033 | ||
1034 | return inet_diag_get_exact(in_skb, nlh, &req); | |
1035 | } | |
1036 | ||
8d34172d | 1037 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1038 | { |
3b09c84c | 1039 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 1040 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1041 | |
ead592ba TG |
1042 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
1043 | nlmsg_len(nlh) < hdrlen) | |
1044 | return -EINVAL; | |
1da177e4 | 1045 | |
b8f3ab42 | 1046 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1047 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1048 | struct nlattr *attr; | |
1da177e4 | 1049 | |
ead592ba TG |
1050 | attr = nlmsg_find_attr(nlh, hdrlen, |
1051 | INET_DIAG_REQ_BYTECODE); | |
1052 | if (attr == NULL || | |
1053 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
1054 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1055 | return -EINVAL; | |
1056 | } | |
80d326fa PNA |
1057 | { |
1058 | struct netlink_dump_control c = { | |
1059 | .dump = inet_diag_dump_compat, | |
1060 | }; | |
51d7cccf | 1061 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1062 | } |
1da177e4 | 1063 | } |
ead592ba | 1064 | |
fe50ce28 | 1065 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1066 | } |
1067 | ||
d366477a PE |
1068 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
1069 | { | |
c8991362 | 1070 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1071 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1072 | |
1073 | if (nlmsg_len(h) < hdrlen) | |
1074 | return -EINVAL; | |
1075 | ||
1076 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1077 | if (nlmsg_attrlen(h, hdrlen)) { |
1078 | struct nlattr *attr; | |
1079 | attr = nlmsg_find_attr(h, hdrlen, | |
1080 | INET_DIAG_REQ_BYTECODE); | |
1081 | if (attr == NULL || | |
1082 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
1083 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1084 | return -EINVAL; | |
1085 | } | |
80d326fa PNA |
1086 | { |
1087 | struct netlink_dump_control c = { | |
1088 | .dump = inet_diag_dump, | |
1089 | }; | |
51d7cccf | 1090 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1091 | } |
d366477a PE |
1092 | } |
1093 | ||
d106352d | 1094 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
d366477a PE |
1095 | } |
1096 | ||
8dcf01fc | 1097 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a PE |
1098 | .family = AF_INET, |
1099 | .dump = inet_diag_handler_dump, | |
1100 | }; | |
1101 | ||
8dcf01fc | 1102 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a PE |
1103 | .family = AF_INET6, |
1104 | .dump = inet_diag_handler_dump, | |
1105 | }; | |
1106 | ||
4f5736c4 ACM |
1107 | int inet_diag_register(const struct inet_diag_handler *h) |
1108 | { | |
1109 | const __u16 type = h->idiag_type; | |
1110 | int err = -EINVAL; | |
1111 | ||
f13c95f0 | 1112 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1113 | goto out; |
1114 | ||
d523a328 | 1115 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1116 | err = -EEXIST; |
1117 | if (inet_diag_table[type] == NULL) { | |
1118 | inet_diag_table[type] = h; | |
1119 | err = 0; | |
1120 | } | |
d523a328 | 1121 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1122 | out: |
1123 | return err; | |
1124 | } | |
1125 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1126 | ||
1127 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1128 | { | |
1129 | const __u16 type = h->idiag_type; | |
1130 | ||
f13c95f0 | 1131 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1132 | return; |
1133 | ||
d523a328 | 1134 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1135 | inet_diag_table[type] = NULL; |
d523a328 | 1136 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1137 | } |
1138 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1139 | ||
73c1f4a0 | 1140 | static int __init inet_diag_init(void) |
1da177e4 | 1141 | { |
f13c95f0 | 1142 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1143 | sizeof(struct inet_diag_handler *)); |
1144 | int err = -ENOMEM; | |
1145 | ||
0da974f4 | 1146 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1147 | if (!inet_diag_table) |
1148 | goto out; | |
1149 | ||
d366477a PE |
1150 | err = sock_diag_register(&inet_diag_handler); |
1151 | if (err) | |
1152 | goto out_free_nl; | |
1153 | ||
1154 | err = sock_diag_register(&inet6_diag_handler); | |
1155 | if (err) | |
1156 | goto out_free_inet; | |
1157 | ||
8ef874bf | 1158 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1159 | out: |
1160 | return err; | |
d366477a PE |
1161 | |
1162 | out_free_inet: | |
1163 | sock_diag_unregister(&inet_diag_handler); | |
1164 | out_free_nl: | |
4f5736c4 ACM |
1165 | kfree(inet_diag_table); |
1166 | goto out; | |
1da177e4 LT |
1167 | } |
1168 | ||
73c1f4a0 | 1169 | static void __exit inet_diag_exit(void) |
1da177e4 | 1170 | { |
d366477a PE |
1171 | sock_diag_unregister(&inet6_diag_handler); |
1172 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1173 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1174 | kfree(inet_diag_table); |
1da177e4 LT |
1175 | } |
1176 | ||
73c1f4a0 ACM |
1177 | module_init(inet_diag_init); |
1178 | module_exit(inet_diag_exit); | |
1da177e4 | 1179 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1180 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1181 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |