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