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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; | |
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 | ||
64 | static inline void inet_diag_unlock_handler( | |
65 | const struct inet_diag_handler *handler) | |
66 | { | |
67 | mutex_unlock(&inet_diag_table_mutex); | |
68 | } | |
69 | ||
3c4d05c8 | 70 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
c8991362 | 71 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
d06ca956 | 72 | struct user_namespace *user_ns, |
15e47304 | 73 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 | 74 | const struct nlmsghdr *unlh) |
1da177e4 | 75 | { |
463c84b9 | 76 | const struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 77 | struct inet_diag_msg *r; |
1da177e4 | 78 | struct nlmsghdr *nlh; |
6e277ed5 | 79 | struct nlattr *attr; |
4f5736c4 | 80 | void *info = NULL; |
4f5736c4 | 81 | const struct inet_diag_handler *handler; |
a029fe26 | 82 | int ext = req->idiag_ext; |
4f5736c4 | 83 | |
a029fe26 | 84 | handler = inet_diag_table[req->sdiag_protocol]; |
4f5736c4 | 85 | BUG_ON(handler == NULL); |
1da177e4 | 86 | |
15e47304 | 87 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
88 | nlmsg_flags); |
89 | if (!nlh) | |
d106352d | 90 | return -EMSGSIZE; |
4f5736c4 | 91 | |
d106352d | 92 | r = nlmsg_data(nlh); |
c7d58aab ACM |
93 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
94 | ||
73c1f4a0 ACM |
95 | r->idiag_family = sk->sk_family; |
96 | r->idiag_state = sk->sk_state; | |
97 | r->idiag_timer = 0; | |
98 | r->idiag_retrans = 0; | |
1da177e4 | 99 | |
73c1f4a0 | 100 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 101 | sock_diag_save_cookie(sk, r->id.idiag_cookie); |
1da177e4 | 102 | |
c720c7e8 ED |
103 | r->id.idiag_sport = inet->inet_sport; |
104 | r->id.idiag_dport = inet->inet_dport; | |
105 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
106 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 107 | |
717b6d83 MŻ |
108 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
109 | * hence this needs to be included regardless of socket family. | |
110 | */ | |
111 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
6e277ed5 TG |
112 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
113 | goto errout; | |
717b6d83 | 114 | |
dfd56b8b | 115 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 116 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 117 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 118 | |
4e3fd7a0 AD |
119 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
120 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
6e277ed5 | 121 | |
06236ac3 | 122 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
6e277ed5 TG |
123 | if (nla_put_u8(skb, INET_DIAG_TCLASS, np->tclass) < 0) |
124 | goto errout; | |
1da177e4 LT |
125 | } |
126 | #endif | |
127 | ||
d06ca956 | 128 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
3c4d05c8 PE |
129 | r->idiag_inode = sock_i_ino(sk); |
130 | ||
6e277ed5 TG |
131 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
132 | struct inet_diag_meminfo minfo = { | |
133 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
134 | .idiag_wmem = sk->sk_wmem_queued, | |
135 | .idiag_fmem = sk->sk_forward_alloc, | |
136 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
137 | }; | |
138 | ||
139 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
140 | goto errout; | |
3c4d05c8 PE |
141 | } |
142 | ||
c0636faa PE |
143 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
144 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 145 | goto errout; |
c0636faa | 146 | |
3c4d05c8 | 147 | if (icsk == NULL) { |
62ad6fcd | 148 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
149 | goto out; |
150 | } | |
151 | ||
172589cc | 152 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 153 | |
463c84b9 | 154 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
155 | r->idiag_timer = 1; |
156 | r->idiag_retrans = icsk->icsk_retransmits; | |
157 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 158 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
159 | r->idiag_timer = 4; |
160 | r->idiag_retrans = icsk->icsk_probes_out; | |
161 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 162 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
163 | r->idiag_timer = 2; |
164 | r->idiag_retrans = icsk->icsk_probes_out; | |
165 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 166 | } else { |
73c1f4a0 ACM |
167 | r->idiag_timer = 0; |
168 | r->idiag_expires = 0; | |
1da177e4 LT |
169 | } |
170 | #undef EXPIRES_IN_MS | |
540722ff | 171 | |
6e277ed5 TG |
172 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
173 | attr = nla_reserve(skb, INET_DIAG_INFO, | |
174 | sizeof(struct tcp_info)); | |
175 | if (!attr) | |
176 | goto errout; | |
3c4d05c8 | 177 | |
6e277ed5 | 178 | info = nla_data(attr); |
1da177e4 LT |
179 | } |
180 | ||
6e277ed5 TG |
181 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
182 | if (nla_put_string(skb, INET_DIAG_CONG, | |
183 | icsk->icsk_ca_ops->name) < 0) | |
184 | goto errout; | |
185 | ||
4f5736c4 | 186 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 187 | |
6687e988 ACM |
188 | if (sk->sk_state < TCP_TIME_WAIT && |
189 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
190 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 191 | |
3c4d05c8 | 192 | out: |
6e277ed5 | 193 | return nlmsg_end(skb, nlh); |
1da177e4 | 194 | |
6e277ed5 TG |
195 | errout: |
196 | nlmsg_cancel(skb, nlh); | |
26932566 | 197 | return -EMSGSIZE; |
1da177e4 | 198 | } |
3c4d05c8 PE |
199 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
200 | ||
201 | static int inet_csk_diag_fill(struct sock *sk, | |
c8991362 | 202 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
d06ca956 | 203 | struct user_namespace *user_ns, |
15e47304 | 204 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
205 | const struct nlmsghdr *unlh) |
206 | { | |
207 | return inet_sk_diag_fill(sk, inet_csk(sk), | |
15e47304 | 208 | skb, req, user_ns, portid, seq, nlmsg_flags, unlh); |
3c4d05c8 | 209 | } |
1da177e4 | 210 | |
c7d58aab | 211 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
c8991362 | 212 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
15e47304 | 213 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
214 | const struct nlmsghdr *unlh) |
215 | { | |
216 | long tmo; | |
217 | struct inet_diag_msg *r; | |
6e277ed5 | 218 | struct nlmsghdr *nlh; |
d106352d | 219 | |
15e47304 | 220 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
221 | nlmsg_flags); |
222 | if (!nlh) | |
d106352d | 223 | return -EMSGSIZE; |
c7d58aab | 224 | |
d106352d | 225 | r = nlmsg_data(nlh); |
c7d58aab ACM |
226 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
227 | ||
c7d58aab ACM |
228 | tmo = tw->tw_ttd - jiffies; |
229 | if (tmo < 0) | |
230 | tmo = 0; | |
231 | ||
232 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
233 | r->idiag_retrans = 0; |
234 | r->id.idiag_if = tw->tw_bound_dev_if; | |
f65c1b53 | 235 | sock_diag_save_cookie(tw, r->id.idiag_cookie); |
c7d58aab ACM |
236 | r->id.idiag_sport = tw->tw_sport; |
237 | r->id.idiag_dport = tw->tw_dport; | |
238 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
239 | r->id.idiag_dst[0] = tw->tw_daddr; | |
240 | r->idiag_state = tw->tw_substate; | |
241 | r->idiag_timer = 3; | |
172589cc | 242 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
243 | r->idiag_rqueue = 0; |
244 | r->idiag_wqueue = 0; | |
245 | r->idiag_uid = 0; | |
246 | r->idiag_inode = 0; | |
dfd56b8b | 247 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
248 | if (tw->tw_family == AF_INET6) { |
249 | const struct inet6_timewait_sock *tw6 = | |
250 | inet6_twsk((struct sock *)tw); | |
251 | ||
4e3fd7a0 AD |
252 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
253 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
254 | } |
255 | #endif | |
6e277ed5 TG |
256 | |
257 | return nlmsg_end(skb, nlh); | |
c7d58aab ACM |
258 | } |
259 | ||
dff2c035 | 260 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
d06ca956 EB |
261 | struct inet_diag_req_v2 *r, |
262 | struct user_namespace *user_ns, | |
15e47304 | 263 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
264 | const struct nlmsghdr *unlh) |
265 | { | |
266 | if (sk->sk_state == TCP_TIME_WAIT) | |
267 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
15e47304 | 268 | skb, r, portid, seq, nlmsg_flags, |
dff2c035 | 269 | unlh); |
15e47304 | 270 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, nlmsg_flags, unlh); |
dff2c035 ACM |
271 | } |
272 | ||
1942c518 | 273 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
c8991362 | 274 | const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req) |
1da177e4 LT |
275 | { |
276 | int err; | |
277 | struct sock *sk; | |
1da177e4 | 278 | struct sk_buff *rep; |
51d7cccf | 279 | struct net *net = sock_net(in_skb->sk); |
d523a328 | 280 | |
d523a328 | 281 | err = -EINVAL; |
fe50ce28 | 282 | if (req->sdiag_family == AF_INET) { |
51d7cccf | 283 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
284 | req->id.idiag_dport, req->id.idiag_src[0], |
285 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 286 | } |
dfd56b8b | 287 | #if IS_ENABLED(CONFIG_IPV6) |
fe50ce28 | 288 | else if (req->sdiag_family == AF_INET6) { |
51d7cccf | 289 | sk = inet6_lookup(net, hashinfo, |
73c1f4a0 ACM |
290 | (struct in6_addr *)req->id.idiag_dst, |
291 | req->id.idiag_dport, | |
292 | (struct in6_addr *)req->id.idiag_src, | |
293 | req->id.idiag_sport, | |
294 | req->id.idiag_if); | |
1da177e4 LT |
295 | } |
296 | #endif | |
297 | else { | |
476f7dbf | 298 | goto out_nosk; |
1da177e4 LT |
299 | } |
300 | ||
d523a328 | 301 | err = -ENOENT; |
1da177e4 | 302 | if (sk == NULL) |
476f7dbf | 303 | goto out_nosk; |
1da177e4 | 304 | |
f65c1b53 | 305 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 306 | if (err) |
1da177e4 LT |
307 | goto out; |
308 | ||
6e277ed5 TG |
309 | rep = nlmsg_new(sizeof(struct inet_diag_msg) + |
310 | sizeof(struct inet_diag_meminfo) + | |
311 | sizeof(struct tcp_info) + 64, GFP_KERNEL); | |
312 | if (!rep) { | |
313 | err = -ENOMEM; | |
1da177e4 | 314 | goto out; |
6e277ed5 | 315 | } |
1da177e4 | 316 | |
a029fe26 | 317 | err = sk_diag_fill(sk, rep, req, |
d06ca956 | 318 | sk_user_ns(NETLINK_CB(in_skb).ssk), |
15e47304 | 319 | NETLINK_CB(in_skb).portid, |
26932566 PM |
320 | nlh->nlmsg_seq, 0, nlh); |
321 | if (err < 0) { | |
322 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 323 | nlmsg_free(rep); |
26932566 PM |
324 | goto out; |
325 | } | |
15e47304 | 326 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 327 | MSG_DONTWAIT); |
1da177e4 LT |
328 | if (err > 0) |
329 | err = 0; | |
330 | ||
331 | out: | |
332 | if (sk) { | |
333 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 334 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
335 | else |
336 | sock_put(sk); | |
337 | } | |
476f7dbf PE |
338 | out_nosk: |
339 | return err; | |
340 | } | |
1942c518 | 341 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
342 | |
343 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
344 | const struct nlmsghdr *nlh, | |
c8991362 | 345 | struct inet_diag_req_v2 *req) |
476f7dbf PE |
346 | { |
347 | const struct inet_diag_handler *handler; | |
348 | int err; | |
349 | ||
350 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
351 | if (IS_ERR(handler)) | |
352 | err = PTR_ERR(handler); | |
353 | else | |
1942c518 | 354 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 355 | inet_diag_unlock_handler(handler); |
476f7dbf | 356 | |
1da177e4 LT |
357 | return err; |
358 | } | |
359 | ||
9f855299 | 360 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
361 | { |
362 | int words = bits >> 5; | |
363 | ||
364 | bits &= 0x1f; | |
365 | ||
366 | if (words) { | |
367 | if (memcmp(a1, a2, words << 2)) | |
368 | return 0; | |
369 | } | |
370 | if (bits) { | |
9f855299 AV |
371 | __be32 w1, w2; |
372 | __be32 mask; | |
1da177e4 LT |
373 | |
374 | w1 = a1[words]; | |
375 | w2 = a2[words]; | |
376 | ||
377 | mask = htonl((0xffffffff) << (32 - bits)); | |
378 | ||
379 | if ((w1 ^ w2) & mask) | |
380 | return 0; | |
381 | } | |
382 | ||
383 | return 1; | |
384 | } | |
385 | ||
386 | ||
87c22ea5 PE |
387 | static int inet_diag_bc_run(const struct nlattr *_bc, |
388 | const struct inet_diag_entry *entry) | |
1da177e4 | 389 | { |
87c22ea5 PE |
390 | const void *bc = nla_data(_bc); |
391 | int len = nla_len(_bc); | |
392 | ||
1da177e4 LT |
393 | while (len > 0) { |
394 | int yes = 1; | |
73c1f4a0 | 395 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
396 | |
397 | switch (op->code) { | |
73c1f4a0 | 398 | case INET_DIAG_BC_NOP: |
1da177e4 | 399 | break; |
73c1f4a0 | 400 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
401 | yes = 0; |
402 | break; | |
73c1f4a0 | 403 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
404 | yes = entry->sport >= op[1].no; |
405 | break; | |
73c1f4a0 | 406 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 407 | yes = entry->sport <= op[1].no; |
1da177e4 | 408 | break; |
73c1f4a0 | 409 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
410 | yes = entry->dport >= op[1].no; |
411 | break; | |
73c1f4a0 | 412 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
413 | yes = entry->dport <= op[1].no; |
414 | break; | |
73c1f4a0 | 415 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
416 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
417 | break; | |
73c1f4a0 | 418 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
419 | case INET_DIAG_BC_D_COND: { |
420 | struct inet_diag_hostcond *cond; | |
9f855299 | 421 | __be32 *addr; |
1da177e4 | 422 | |
a8c2190e | 423 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 424 | if (cond->port != -1 && |
73c1f4a0 | 425 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
426 | entry->sport : entry->dport)) { |
427 | yes = 0; | |
428 | break; | |
429 | } | |
4e852c02 | 430 | |
1da177e4 LT |
431 | if (cond->prefix_len == 0) |
432 | break; | |
433 | ||
73c1f4a0 | 434 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
435 | addr = entry->saddr; |
436 | else | |
437 | addr = entry->daddr; | |
438 | ||
4e852c02 ACM |
439 | if (bitstring_match(addr, cond->addr, |
440 | cond->prefix_len)) | |
1da177e4 LT |
441 | break; |
442 | if (entry->family == AF_INET6 && | |
443 | cond->family == AF_INET) { | |
444 | if (addr[0] == 0 && addr[1] == 0 && | |
445 | addr[2] == htonl(0xffff) && | |
a8c2190e | 446 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 447 | cond->prefix_len)) |
1da177e4 LT |
448 | break; |
449 | } | |
450 | yes = 0; | |
451 | break; | |
452 | } | |
453 | } | |
454 | ||
4e852c02 | 455 | if (yes) { |
1da177e4 LT |
456 | len -= op->yes; |
457 | bc += op->yes; | |
458 | } else { | |
459 | len -= op->no; | |
460 | bc += op->no; | |
461 | } | |
462 | } | |
a02cec21 | 463 | return len == 0; |
1da177e4 LT |
464 | } |
465 | ||
8d07d151 PE |
466 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
467 | { | |
468 | struct inet_diag_entry entry; | |
469 | struct inet_sock *inet = inet_sk(sk); | |
470 | ||
471 | if (bc == NULL) | |
472 | return 1; | |
473 | ||
474 | entry.family = sk->sk_family; | |
dfd56b8b | 475 | #if IS_ENABLED(CONFIG_IPV6) |
8d07d151 PE |
476 | if (entry.family == AF_INET6) { |
477 | struct ipv6_pinfo *np = inet6_sk(sk); | |
478 | ||
479 | entry.saddr = np->rcv_saddr.s6_addr32; | |
480 | entry.daddr = np->daddr.s6_addr32; | |
481 | } else | |
482 | #endif | |
483 | { | |
484 | entry.saddr = &inet->inet_rcv_saddr; | |
485 | entry.daddr = &inet->inet_daddr; | |
486 | } | |
487 | entry.sport = inet->inet_num; | |
488 | entry.dport = ntohs(inet->inet_dport); | |
489 | entry.userlocks = sk->sk_userlocks; | |
490 | ||
491 | return inet_diag_bc_run(bc, &entry); | |
492 | } | |
493 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
494 | ||
1da177e4 LT |
495 | static int valid_cc(const void *bc, int len, int cc) |
496 | { | |
497 | while (len >= 0) { | |
73c1f4a0 | 498 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
499 | |
500 | if (cc > len) | |
501 | return 0; | |
502 | if (cc == len) | |
503 | return 1; | |
eeb14972 | 504 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
505 | return 0; |
506 | len -= op->yes; | |
507 | bc += op->yes; | |
508 | } | |
509 | return 0; | |
510 | } | |
511 | ||
73c1f4a0 | 512 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 513 | { |
eeb14972 | 514 | const void *bc = bytecode; |
1da177e4 LT |
515 | int len = bytecode_len; |
516 | ||
517 | while (len > 0) { | |
eeb14972 | 518 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
519 | |
520 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
521 | switch (op->code) { | |
73c1f4a0 ACM |
522 | case INET_DIAG_BC_AUTO: |
523 | case INET_DIAG_BC_S_COND: | |
524 | case INET_DIAG_BC_D_COND: | |
525 | case INET_DIAG_BC_S_GE: | |
526 | case INET_DIAG_BC_S_LE: | |
527 | case INET_DIAG_BC_D_GE: | |
528 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 529 | case INET_DIAG_BC_JMP: |
eeb14972 | 530 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
531 | return -EINVAL; |
532 | if (op->no < len && | |
a8c2190e | 533 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
534 | return -EINVAL; |
535 | break; | |
73c1f4a0 | 536 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
537 | break; |
538 | default: | |
539 | return -EINVAL; | |
540 | } | |
eeb14972 ED |
541 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
542 | return -EINVAL; | |
4e852c02 | 543 | bc += op->yes; |
1da177e4 LT |
544 | len -= op->yes; |
545 | } | |
546 | return len == 0 ? 0 : -EINVAL; | |
547 | } | |
548 | ||
dff2c035 ACM |
549 | static int inet_csk_diag_dump(struct sock *sk, |
550 | struct sk_buff *skb, | |
37f352b5 | 551 | struct netlink_callback *cb, |
c8991362 | 552 | struct inet_diag_req_v2 *r, |
37f352b5 | 553 | const struct nlattr *bc) |
1da177e4 | 554 | { |
8d07d151 PE |
555 | if (!inet_diag_bc_sk(bc, sk)) |
556 | return 0; | |
1da177e4 | 557 | |
a029fe26 | 558 | return inet_csk_diag_fill(sk, skb, r, |
d06ca956 | 559 | sk_user_ns(NETLINK_CB(cb->skb).ssk), |
15e47304 | 560 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 561 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
562 | } |
563 | ||
c7d58aab ACM |
564 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
565 | struct sk_buff *skb, | |
37f352b5 | 566 | struct netlink_callback *cb, |
c8991362 | 567 | struct inet_diag_req_v2 *r, |
37f352b5 | 568 | const struct nlattr *bc) |
c7d58aab | 569 | { |
37f352b5 | 570 | if (bc != NULL) { |
c7d58aab | 571 | struct inet_diag_entry entry; |
c7d58aab ACM |
572 | |
573 | entry.family = tw->tw_family; | |
dfd56b8b | 574 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
575 | if (tw->tw_family == AF_INET6) { |
576 | struct inet6_timewait_sock *tw6 = | |
577 | inet6_twsk((struct sock *)tw); | |
578 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
579 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
580 | } else | |
581 | #endif | |
582 | { | |
583 | entry.saddr = &tw->tw_rcv_saddr; | |
584 | entry.daddr = &tw->tw_daddr; | |
585 | } | |
586 | entry.sport = tw->tw_num; | |
587 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 588 | entry.userlocks = 0; |
c7d58aab | 589 | |
87c22ea5 | 590 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
591 | return 0; |
592 | } | |
593 | ||
a029fe26 | 594 | return inet_twsk_diag_fill(tw, skb, r, |
15e47304 | 595 | NETLINK_CB(cb->skb).portid, |
c7d58aab ACM |
596 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
597 | } | |
598 | ||
73c1f4a0 | 599 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
d06ca956 EB |
600 | struct request_sock *req, |
601 | struct user_namespace *user_ns, | |
15e47304 | 602 | u32 portid, u32 seq, |
4e852c02 | 603 | const struct nlmsghdr *unlh) |
1da177e4 | 604 | { |
2e6599cb | 605 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 606 | struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 607 | struct inet_diag_msg *r; |
1da177e4 LT |
608 | struct nlmsghdr *nlh; |
609 | long tmo; | |
610 | ||
15e47304 | 611 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
612 | NLM_F_MULTI); |
613 | if (!nlh) | |
614 | return -EMSGSIZE; | |
1da177e4 | 615 | |
6e277ed5 | 616 | r = nlmsg_data(nlh); |
73c1f4a0 ACM |
617 | r->idiag_family = sk->sk_family; |
618 | r->idiag_state = TCP_SYN_RECV; | |
619 | r->idiag_timer = 1; | |
620 | r->idiag_retrans = req->retrans; | |
1da177e4 | 621 | |
73c1f4a0 | 622 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 623 | sock_diag_save_cookie(req, r->id.idiag_cookie); |
1da177e4 LT |
624 | |
625 | tmo = req->expires - jiffies; | |
626 | if (tmo < 0) | |
627 | tmo = 0; | |
628 | ||
c720c7e8 | 629 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
630 | r->id.idiag_dport = ireq->rmt_port; |
631 | r->id.idiag_src[0] = ireq->loc_addr; | |
632 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
633 | r->idiag_expires = jiffies_to_msecs(tmo); | |
634 | r->idiag_rqueue = 0; | |
635 | r->idiag_wqueue = 0; | |
d06ca956 | 636 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
73c1f4a0 | 637 | r->idiag_inode = 0; |
dfd56b8b | 638 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 639 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
640 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
641 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
642 | } |
643 | #endif | |
1da177e4 | 644 | |
6e277ed5 | 645 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
646 | } |
647 | ||
73c1f4a0 | 648 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 649 | struct netlink_callback *cb, |
c8991362 | 650 | struct inet_diag_req_v2 *r, |
37f352b5 | 651 | const struct nlattr *bc) |
1da177e4 | 652 | { |
73c1f4a0 | 653 | struct inet_diag_entry entry; |
463c84b9 | 654 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 655 | struct listen_sock *lopt; |
1da177e4 LT |
656 | struct inet_sock *inet = inet_sk(sk); |
657 | int j, s_j; | |
658 | int reqnum, s_reqnum; | |
659 | int err = 0; | |
660 | ||
661 | s_j = cb->args[3]; | |
662 | s_reqnum = cb->args[4]; | |
663 | ||
664 | if (s_j > 0) | |
665 | s_j--; | |
666 | ||
667 | entry.family = sk->sk_family; | |
668 | ||
463c84b9 | 669 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 670 | |
463c84b9 | 671 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
672 | if (!lopt || !lopt->qlen) |
673 | goto out; | |
674 | ||
37f352b5 | 675 | if (bc != NULL) { |
c720c7e8 | 676 | entry.sport = inet->inet_num; |
1da177e4 LT |
677 | entry.userlocks = sk->sk_userlocks; |
678 | } | |
679 | ||
540722ff | 680 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 681 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
682 | |
683 | reqnum = 0; | |
684 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
685 | struct inet_request_sock *ireq = inet_rsk(req); |
686 | ||
1da177e4 LT |
687 | if (reqnum < s_reqnum) |
688 | continue; | |
73c1f4a0 ACM |
689 | if (r->id.idiag_dport != ireq->rmt_port && |
690 | r->id.idiag_dport) | |
1da177e4 LT |
691 | continue; |
692 | ||
693 | if (bc) { | |
694 | entry.saddr = | |
dfd56b8b | 695 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 696 | (entry.family == AF_INET6) ? |
ca304b61 | 697 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 698 | #endif |
2e6599cb | 699 | &ireq->loc_addr; |
4e852c02 | 700 | entry.daddr = |
dfd56b8b | 701 | #if IS_ENABLED(CONFIG_IPV6) |
1da177e4 | 702 | (entry.family == AF_INET6) ? |
ca304b61 | 703 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 704 | #endif |
2e6599cb ACM |
705 | &ireq->rmt_addr; |
706 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 707 | |
87c22ea5 | 708 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
709 | continue; |
710 | } | |
711 | ||
73c1f4a0 | 712 | err = inet_diag_fill_req(skb, sk, req, |
d06ca956 | 713 | sk_user_ns(NETLINK_CB(cb->skb).ssk), |
15e47304 | 714 | NETLINK_CB(cb->skb).portid, |
540722ff | 715 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
716 | if (err < 0) { |
717 | cb->args[3] = j + 1; | |
718 | cb->args[4] = reqnum; | |
719 | goto out; | |
720 | } | |
721 | } | |
722 | ||
723 | s_reqnum = 0; | |
724 | } | |
725 | ||
726 | out: | |
463c84b9 | 727 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
728 | |
729 | return err; | |
730 | } | |
731 | ||
1942c518 | 732 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
c8991362 | 733 | struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 LT |
734 | { |
735 | int i, num; | |
736 | int s_i, s_num; | |
51d7cccf | 737 | struct net *net = sock_net(skb->sk); |
4e852c02 | 738 | |
1da177e4 LT |
739 | s_i = cb->args[1]; |
740 | s_num = num = cb->args[2]; | |
4f5736c4 | 741 | |
1da177e4 | 742 | if (cb->args[0] == 0) { |
73c1f4a0 | 743 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 744 | goto skip_listen_ht; |
540722ff | 745 | |
0f7ff927 | 746 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 747 | struct sock *sk; |
c25eb3bf | 748 | struct hlist_nulls_node *node; |
5caea4ea | 749 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
750 | |
751 | num = 0; | |
5caea4ea ED |
752 | ilb = &hashinfo->listening_hash[i]; |
753 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 754 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
755 | struct inet_sock *inet = inet_sk(sk); |
756 | ||
51d7cccf AV |
757 | if (!net_eq(sock_net(sk), net)) |
758 | continue; | |
759 | ||
1da177e4 LT |
760 | if (num < s_num) { |
761 | num++; | |
762 | continue; | |
763 | } | |
764 | ||
d23deaa0 PE |
765 | if (r->sdiag_family != AF_UNSPEC && |
766 | sk->sk_family != r->sdiag_family) | |
767 | goto next_listen; | |
768 | ||
c720c7e8 | 769 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 770 | r->id.idiag_sport) |
1da177e4 LT |
771 | goto next_listen; |
772 | ||
73c1f4a0 ACM |
773 | if (!(r->idiag_states & TCPF_LISTEN) || |
774 | r->id.idiag_dport || | |
1da177e4 LT |
775 | cb->args[3] > 0) |
776 | goto syn_recv; | |
777 | ||
25c4cd2b | 778 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 779 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
780 | goto done; |
781 | } | |
782 | ||
783 | syn_recv: | |
73c1f4a0 | 784 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
785 | goto next_listen; |
786 | ||
25c4cd2b | 787 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 788 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
789 | goto done; |
790 | } | |
791 | ||
792 | next_listen: | |
793 | cb->args[3] = 0; | |
794 | cb->args[4] = 0; | |
795 | ++num; | |
796 | } | |
5caea4ea | 797 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
798 | |
799 | s_num = 0; | |
800 | cb->args[3] = 0; | |
801 | cb->args[4] = 0; | |
802 | } | |
1da177e4 LT |
803 | skip_listen_ht: |
804 | cb->args[0] = 1; | |
805 | s_i = num = s_num = 0; | |
806 | } | |
807 | ||
73c1f4a0 | 808 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 809 | goto out; |
1da177e4 | 810 | |
f373b53b | 811 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 812 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 813 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 814 | struct sock *sk; |
3ab5aee7 | 815 | struct hlist_nulls_node *node; |
1da177e4 | 816 | |
6be547a6 AK |
817 | num = 0; |
818 | ||
3ab5aee7 ED |
819 | if (hlist_nulls_empty(&head->chain) && |
820 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
821 | continue; |
822 | ||
1da177e4 LT |
823 | if (i > s_i) |
824 | s_num = 0; | |
825 | ||
7e3aab4a | 826 | spin_lock_bh(lock); |
3ab5aee7 | 827 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
828 | struct inet_sock *inet = inet_sk(sk); |
829 | ||
51d7cccf AV |
830 | if (!net_eq(sock_net(sk), net)) |
831 | continue; | |
1da177e4 LT |
832 | if (num < s_num) |
833 | goto next_normal; | |
73c1f4a0 | 834 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 835 | goto next_normal; |
d23deaa0 PE |
836 | if (r->sdiag_family != AF_UNSPEC && |
837 | sk->sk_family != r->sdiag_family) | |
838 | goto next_normal; | |
c720c7e8 | 839 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 840 | r->id.idiag_sport) |
1da177e4 | 841 | goto next_normal; |
c720c7e8 | 842 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 843 | r->id.idiag_dport) |
1da177e4 | 844 | goto next_normal; |
25c4cd2b | 845 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
7e3aab4a | 846 | spin_unlock_bh(lock); |
1da177e4 LT |
847 | goto done; |
848 | } | |
849 | next_normal: | |
850 | ++num; | |
851 | } | |
852 | ||
73c1f4a0 | 853 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
854 | struct inet_timewait_sock *tw; |
855 | ||
856 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 857 | &head->twchain) { |
51d7cccf AV |
858 | if (!net_eq(twsk_net(tw), net)) |
859 | continue; | |
1da177e4 LT |
860 | |
861 | if (num < s_num) | |
862 | goto next_dying; | |
d23deaa0 PE |
863 | if (r->sdiag_family != AF_UNSPEC && |
864 | tw->tw_family != r->sdiag_family) | |
865 | goto next_dying; | |
7dbf0755 | 866 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 867 | r->id.idiag_sport) |
1da177e4 | 868 | goto next_dying; |
7dbf0755 | 869 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 870 | r->id.idiag_dport) |
1da177e4 | 871 | goto next_dying; |
25c4cd2b | 872 | if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) { |
7e3aab4a | 873 | spin_unlock_bh(lock); |
1da177e4 LT |
874 | goto done; |
875 | } | |
876 | next_dying: | |
877 | ++num; | |
878 | } | |
879 | } | |
7e3aab4a | 880 | spin_unlock_bh(lock); |
1da177e4 LT |
881 | } |
882 | ||
883 | done: | |
884 | cb->args[1] = i; | |
885 | cb->args[2] = num; | |
efb3cb42 PE |
886 | out: |
887 | ; | |
888 | } | |
1942c518 | 889 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
890 | |
891 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
c8991362 | 892 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
efb3cb42 PE |
893 | { |
894 | const struct inet_diag_handler *handler; | |
895 | ||
896 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
897 | if (!IS_ERR(handler)) | |
1942c518 | 898 | handler->dump(skb, cb, r, bc); |
d523a328 | 899 | inet_diag_unlock_handler(handler); |
efb3cb42 | 900 | |
1da177e4 LT |
901 | return skb->len; |
902 | } | |
903 | ||
25c4cd2b PE |
904 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
905 | { | |
906 | struct nlattr *bc = NULL; | |
c8991362 | 907 | int hdrlen = sizeof(struct inet_diag_req_v2); |
25c4cd2b PE |
908 | |
909 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
910 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
911 | ||
d106352d | 912 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
913 | } |
914 | ||
a029fe26 PE |
915 | static inline int inet_diag_type2proto(int type) |
916 | { | |
917 | switch (type) { | |
918 | case TCPDIAG_GETSOCK: | |
919 | return IPPROTO_TCP; | |
920 | case DCCPDIAG_GETSOCK: | |
921 | return IPPROTO_DCCP; | |
922 | default: | |
923 | return 0; | |
924 | } | |
925 | } | |
926 | ||
25c4cd2b PE |
927 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
928 | { | |
d106352d | 929 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
c8991362 | 930 | struct inet_diag_req_v2 req; |
25c4cd2b | 931 | struct nlattr *bc = NULL; |
3b09c84c | 932 | int hdrlen = sizeof(struct inet_diag_req); |
25c4cd2b | 933 | |
d23deaa0 | 934 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
935 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
936 | req.idiag_ext = rc->idiag_ext; | |
937 | req.idiag_states = rc->idiag_states; | |
938 | req.id = rc->id; | |
939 | ||
940 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
941 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
942 | ||
943 | return __inet_diag_dump(skb, cb, &req, bc); | |
944 | } | |
945 | ||
fe50ce28 PE |
946 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
947 | const struct nlmsghdr *nlh) | |
948 | { | |
d106352d | 949 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 950 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
951 | |
952 | req.sdiag_family = rc->idiag_family; | |
953 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
954 | req.idiag_ext = rc->idiag_ext; | |
955 | req.idiag_states = rc->idiag_states; | |
956 | req.id = rc->id; | |
957 | ||
958 | return inet_diag_get_exact(in_skb, nlh, &req); | |
959 | } | |
960 | ||
8d34172d | 961 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 962 | { |
3b09c84c | 963 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 964 | struct net *net = sock_net(skb->sk); |
1da177e4 | 965 | |
ead592ba TG |
966 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
967 | nlmsg_len(nlh) < hdrlen) | |
968 | return -EINVAL; | |
1da177e4 | 969 | |
b8f3ab42 | 970 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
971 | if (nlmsg_attrlen(nlh, hdrlen)) { |
972 | struct nlattr *attr; | |
1da177e4 | 973 | |
ead592ba TG |
974 | attr = nlmsg_find_attr(nlh, hdrlen, |
975 | INET_DIAG_REQ_BYTECODE); | |
976 | if (attr == NULL || | |
977 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
978 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
979 | return -EINVAL; | |
980 | } | |
80d326fa PNA |
981 | { |
982 | struct netlink_dump_control c = { | |
983 | .dump = inet_diag_dump_compat, | |
984 | }; | |
51d7cccf | 985 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 986 | } |
1da177e4 | 987 | } |
ead592ba | 988 | |
fe50ce28 | 989 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
990 | } |
991 | ||
d366477a PE |
992 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
993 | { | |
c8991362 | 994 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 995 | struct net *net = sock_net(skb->sk); |
d366477a PE |
996 | |
997 | if (nlmsg_len(h) < hdrlen) | |
998 | return -EINVAL; | |
999 | ||
1000 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1001 | if (nlmsg_attrlen(h, hdrlen)) { |
1002 | struct nlattr *attr; | |
1003 | attr = nlmsg_find_attr(h, hdrlen, | |
1004 | INET_DIAG_REQ_BYTECODE); | |
1005 | if (attr == NULL || | |
1006 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
1007 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1008 | return -EINVAL; | |
1009 | } | |
80d326fa PNA |
1010 | { |
1011 | struct netlink_dump_control c = { | |
1012 | .dump = inet_diag_dump, | |
1013 | }; | |
51d7cccf | 1014 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1015 | } |
d366477a PE |
1016 | } |
1017 | ||
d106352d | 1018 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
d366477a PE |
1019 | } |
1020 | ||
8dcf01fc | 1021 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a PE |
1022 | .family = AF_INET, |
1023 | .dump = inet_diag_handler_dump, | |
1024 | }; | |
1025 | ||
8dcf01fc | 1026 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a PE |
1027 | .family = AF_INET6, |
1028 | .dump = inet_diag_handler_dump, | |
1029 | }; | |
1030 | ||
4f5736c4 ACM |
1031 | int inet_diag_register(const struct inet_diag_handler *h) |
1032 | { | |
1033 | const __u16 type = h->idiag_type; | |
1034 | int err = -EINVAL; | |
1035 | ||
f13c95f0 | 1036 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1037 | goto out; |
1038 | ||
d523a328 | 1039 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1040 | err = -EEXIST; |
1041 | if (inet_diag_table[type] == NULL) { | |
1042 | inet_diag_table[type] = h; | |
1043 | err = 0; | |
1044 | } | |
d523a328 | 1045 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1046 | out: |
1047 | return err; | |
1048 | } | |
1049 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1050 | ||
1051 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1052 | { | |
1053 | const __u16 type = h->idiag_type; | |
1054 | ||
f13c95f0 | 1055 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1056 | return; |
1057 | ||
d523a328 | 1058 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1059 | inet_diag_table[type] = NULL; |
d523a328 | 1060 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1061 | } |
1062 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1063 | ||
73c1f4a0 | 1064 | static int __init inet_diag_init(void) |
1da177e4 | 1065 | { |
f13c95f0 | 1066 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1067 | sizeof(struct inet_diag_handler *)); |
1068 | int err = -ENOMEM; | |
1069 | ||
0da974f4 | 1070 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1071 | if (!inet_diag_table) |
1072 | goto out; | |
1073 | ||
d366477a PE |
1074 | err = sock_diag_register(&inet_diag_handler); |
1075 | if (err) | |
1076 | goto out_free_nl; | |
1077 | ||
1078 | err = sock_diag_register(&inet6_diag_handler); | |
1079 | if (err) | |
1080 | goto out_free_inet; | |
1081 | ||
8ef874bf | 1082 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1083 | out: |
1084 | return err; | |
d366477a PE |
1085 | |
1086 | out_free_inet: | |
1087 | sock_diag_unregister(&inet_diag_handler); | |
1088 | out_free_nl: | |
4f5736c4 ACM |
1089 | kfree(inet_diag_table); |
1090 | goto out; | |
1da177e4 LT |
1091 | } |
1092 | ||
73c1f4a0 | 1093 | static void __exit inet_diag_exit(void) |
1da177e4 | 1094 | { |
d366477a PE |
1095 | sock_diag_unregister(&inet6_diag_handler); |
1096 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1097 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1098 | kfree(inet_diag_table); |
1da177e4 LT |
1099 | } |
1100 | ||
73c1f4a0 ACM |
1101 | module_init(inet_diag_init); |
1102 | module_exit(inet_diag_exit); | |
1da177e4 | 1103 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1104 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1105 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |