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 | ||
73c1f4a0 | 49 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
7c99c909 | 50 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
1da177e4 | 51 | |
d523a328 HX |
52 | static DEFINE_MUTEX(inet_diag_table_mutex); |
53 | ||
f13c95f0 | 54 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 55 | { |
f13c95f0 | 56 | if (!inet_diag_table[proto]) |
aec8dc62 PE |
57 | request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK, |
58 | NETLINK_SOCK_DIAG, AF_INET, proto); | |
d523a328 HX |
59 | |
60 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 61 | if (!inet_diag_table[proto]) |
d523a328 HX |
62 | return ERR_PTR(-ENOENT); |
63 | ||
f13c95f0 | 64 | return inet_diag_table[proto]; |
d523a328 HX |
65 | } |
66 | ||
67 | static inline void inet_diag_unlock_handler( | |
68 | const struct inet_diag_handler *handler) | |
69 | { | |
70 | mutex_unlock(&inet_diag_table_mutex); | |
71 | } | |
72 | ||
3c4d05c8 | 73 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
c8991362 | 74 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
a029fe26 | 75 | u32 pid, u32 seq, u16 nlmsg_flags, |
dff2c035 | 76 | const struct nlmsghdr *unlh) |
1da177e4 | 77 | { |
463c84b9 | 78 | const struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 79 | struct inet_diag_msg *r; |
1da177e4 | 80 | struct nlmsghdr *nlh; |
4f5736c4 | 81 | void *info = NULL; |
73c1f4a0 | 82 | struct inet_diag_meminfo *minfo = NULL; |
27a884dc | 83 | unsigned char *b = skb_tail_pointer(skb); |
4f5736c4 | 84 | const struct inet_diag_handler *handler; |
a029fe26 | 85 | int ext = req->idiag_ext; |
4f5736c4 | 86 | |
a029fe26 | 87 | handler = inet_diag_table[req->sdiag_protocol]; |
4f5736c4 | 88 | BUG_ON(handler == NULL); |
1da177e4 | 89 | |
540722ff | 90 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 | 91 | nlh->nlmsg_flags = nlmsg_flags; |
4f5736c4 | 92 | |
1da177e4 | 93 | r = NLMSG_DATA(nlh); |
c7d58aab ACM |
94 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
95 | ||
96 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) | |
97 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo)); | |
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 | |
717b6d83 MŻ |
112 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
113 | * hence this needs to be included regardless of socket family. | |
114 | */ | |
115 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
116 | RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos); | |
117 | ||
dfd56b8b | 118 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 119 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 120 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 121 | |
4e3fd7a0 AD |
122 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
123 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
06236ac3 MŻ |
124 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
125 | RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass); | |
1da177e4 LT |
126 | } |
127 | #endif | |
128 | ||
3c4d05c8 PE |
129 | r->idiag_uid = sock_i_uid(sk); |
130 | r->idiag_inode = sock_i_ino(sk); | |
131 | ||
132 | if (minfo) { | |
133 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); | |
134 | minfo->idiag_wmem = sk->sk_wmem_queued; | |
135 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
136 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); | |
137 | } | |
138 | ||
c0636faa PE |
139 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
140 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
141 | goto rtattr_failure; | |
142 | ||
3c4d05c8 PE |
143 | if (icsk == NULL) { |
144 | r->idiag_rqueue = r->idiag_wqueue = 0; | |
145 | goto out; | |
146 | } | |
147 | ||
172589cc | 148 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 149 | |
463c84b9 | 150 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
151 | r->idiag_timer = 1; |
152 | r->idiag_retrans = icsk->icsk_retransmits; | |
153 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 154 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
155 | r->idiag_timer = 4; |
156 | r->idiag_retrans = icsk->icsk_probes_out; | |
157 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 158 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
159 | r->idiag_timer = 2; |
160 | r->idiag_retrans = icsk->icsk_probes_out; | |
161 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 162 | } else { |
73c1f4a0 ACM |
163 | r->idiag_timer = 0; |
164 | r->idiag_expires = 0; | |
1da177e4 LT |
165 | } |
166 | #undef EXPIRES_IN_MS | |
540722ff | 167 | |
3c4d05c8 PE |
168 | if (ext & (1 << (INET_DIAG_INFO - 1))) |
169 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, sizeof(struct tcp_info)); | |
1da177e4 | 170 | |
3c4d05c8 PE |
171 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { |
172 | const size_t len = strlen(icsk->icsk_ca_ops->name); | |
173 | ||
174 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), | |
175 | icsk->icsk_ca_ops->name); | |
1da177e4 LT |
176 | } |
177 | ||
4f5736c4 | 178 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 179 | |
6687e988 ACM |
180 | if (sk->sk_state < TCP_TIME_WAIT && |
181 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
182 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 183 | |
3c4d05c8 | 184 | out: |
27a884dc | 185 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
186 | return skb->len; |
187 | ||
7c99c909 | 188 | rtattr_failure: |
1da177e4 | 189 | nlmsg_failure: |
dc5fc579 | 190 | nlmsg_trim(skb, b); |
26932566 | 191 | return -EMSGSIZE; |
1da177e4 | 192 | } |
3c4d05c8 PE |
193 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
194 | ||
195 | static int inet_csk_diag_fill(struct sock *sk, | |
c8991362 | 196 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
3c4d05c8 PE |
197 | u32 pid, u32 seq, u16 nlmsg_flags, |
198 | const struct nlmsghdr *unlh) | |
199 | { | |
200 | return inet_sk_diag_fill(sk, inet_csk(sk), | |
201 | skb, req, pid, seq, nlmsg_flags, unlh); | |
202 | } | |
1da177e4 | 203 | |
c7d58aab | 204 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
c8991362 | 205 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
a029fe26 | 206 | u32 pid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
207 | const struct nlmsghdr *unlh) |
208 | { | |
209 | long tmo; | |
210 | struct inet_diag_msg *r; | |
27a884dc | 211 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
c7d58aab ACM |
212 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
213 | unlh->nlmsg_type, sizeof(*r)); | |
214 | ||
215 | r = NLMSG_DATA(nlh); | |
216 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
217 | ||
218 | nlh->nlmsg_flags = nlmsg_flags; | |
219 | ||
220 | tmo = tw->tw_ttd - jiffies; | |
221 | if (tmo < 0) | |
222 | tmo = 0; | |
223 | ||
224 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
225 | r->idiag_retrans = 0; |
226 | r->id.idiag_if = tw->tw_bound_dev_if; | |
f65c1b53 | 227 | sock_diag_save_cookie(tw, r->id.idiag_cookie); |
c7d58aab ACM |
228 | r->id.idiag_sport = tw->tw_sport; |
229 | r->id.idiag_dport = tw->tw_dport; | |
230 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
231 | r->id.idiag_dst[0] = tw->tw_daddr; | |
232 | r->idiag_state = tw->tw_substate; | |
233 | r->idiag_timer = 3; | |
172589cc | 234 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
235 | r->idiag_rqueue = 0; |
236 | r->idiag_wqueue = 0; | |
237 | r->idiag_uid = 0; | |
238 | r->idiag_inode = 0; | |
dfd56b8b | 239 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
240 | if (tw->tw_family == AF_INET6) { |
241 | const struct inet6_timewait_sock *tw6 = | |
242 | inet6_twsk((struct sock *)tw); | |
243 | ||
4e3fd7a0 AD |
244 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
245 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
246 | } |
247 | #endif | |
27a884dc | 248 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
c7d58aab ACM |
249 | return skb->len; |
250 | nlmsg_failure: | |
dc5fc579 | 251 | nlmsg_trim(skb, previous_tail); |
26932566 | 252 | return -EMSGSIZE; |
c7d58aab ACM |
253 | } |
254 | ||
dff2c035 | 255 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
c8991362 | 256 | struct inet_diag_req_v2 *r, u32 pid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
257 | const struct nlmsghdr *unlh) |
258 | { | |
259 | if (sk->sk_state == TCP_TIME_WAIT) | |
260 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
a029fe26 | 261 | skb, r, pid, seq, nlmsg_flags, |
dff2c035 | 262 | unlh); |
a029fe26 | 263 | return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh); |
dff2c035 ACM |
264 | } |
265 | ||
1942c518 | 266 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
c8991362 | 267 | const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req) |
1da177e4 LT |
268 | { |
269 | int err; | |
270 | struct sock *sk; | |
1da177e4 | 271 | struct sk_buff *rep; |
d523a328 | 272 | |
d523a328 | 273 | err = -EINVAL; |
fe50ce28 | 274 | if (req->sdiag_family == AF_INET) { |
c67499c0 | 275 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
276 | req->id.idiag_dport, req->id.idiag_src[0], |
277 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 278 | } |
dfd56b8b | 279 | #if IS_ENABLED(CONFIG_IPV6) |
fe50ce28 | 280 | else if (req->sdiag_family == AF_INET6) { |
d86e0dac | 281 | sk = inet6_lookup(&init_net, hashinfo, |
73c1f4a0 ACM |
282 | (struct in6_addr *)req->id.idiag_dst, |
283 | req->id.idiag_dport, | |
284 | (struct in6_addr *)req->id.idiag_src, | |
285 | req->id.idiag_sport, | |
286 | req->id.idiag_if); | |
1da177e4 LT |
287 | } |
288 | #endif | |
289 | else { | |
476f7dbf | 290 | goto out_nosk; |
1da177e4 LT |
291 | } |
292 | ||
d523a328 | 293 | err = -ENOENT; |
1da177e4 | 294 | if (sk == NULL) |
476f7dbf | 295 | goto out_nosk; |
1da177e4 | 296 | |
f65c1b53 | 297 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 298 | if (err) |
1da177e4 LT |
299 | goto out; |
300 | ||
301 | err = -ENOMEM; | |
73c1f4a0 ACM |
302 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
303 | sizeof(struct inet_diag_meminfo) + | |
7b35eadd | 304 | sizeof(struct tcp_info) + 64)), |
4f5736c4 | 305 | GFP_KERNEL); |
1da177e4 LT |
306 | if (!rep) |
307 | goto out; | |
308 | ||
a029fe26 | 309 | err = sk_diag_fill(sk, rep, req, |
26932566 PM |
310 | NETLINK_CB(in_skb).pid, |
311 | nlh->nlmsg_seq, 0, nlh); | |
312 | if (err < 0) { | |
313 | WARN_ON(err == -EMSGSIZE); | |
314 | kfree_skb(rep); | |
315 | goto out; | |
316 | } | |
8ef874bf | 317 | err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid, |
73c1f4a0 | 318 | MSG_DONTWAIT); |
1da177e4 LT |
319 | if (err > 0) |
320 | err = 0; | |
321 | ||
322 | out: | |
323 | if (sk) { | |
324 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 325 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
326 | else |
327 | sock_put(sk); | |
328 | } | |
476f7dbf PE |
329 | out_nosk: |
330 | return err; | |
331 | } | |
1942c518 | 332 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
333 | |
334 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
335 | const struct nlmsghdr *nlh, | |
c8991362 | 336 | struct inet_diag_req_v2 *req) |
476f7dbf PE |
337 | { |
338 | const struct inet_diag_handler *handler; | |
339 | int err; | |
340 | ||
341 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
342 | if (IS_ERR(handler)) | |
343 | err = PTR_ERR(handler); | |
344 | else | |
1942c518 | 345 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 346 | inet_diag_unlock_handler(handler); |
476f7dbf | 347 | |
1da177e4 LT |
348 | return err; |
349 | } | |
350 | ||
9f855299 | 351 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
352 | { |
353 | int words = bits >> 5; | |
354 | ||
355 | bits &= 0x1f; | |
356 | ||
357 | if (words) { | |
358 | if (memcmp(a1, a2, words << 2)) | |
359 | return 0; | |
360 | } | |
361 | if (bits) { | |
9f855299 AV |
362 | __be32 w1, w2; |
363 | __be32 mask; | |
1da177e4 LT |
364 | |
365 | w1 = a1[words]; | |
366 | w2 = a2[words]; | |
367 | ||
368 | mask = htonl((0xffffffff) << (32 - bits)); | |
369 | ||
370 | if ((w1 ^ w2) & mask) | |
371 | return 0; | |
372 | } | |
373 | ||
374 | return 1; | |
375 | } | |
376 | ||
377 | ||
87c22ea5 PE |
378 | static int inet_diag_bc_run(const struct nlattr *_bc, |
379 | const struct inet_diag_entry *entry) | |
1da177e4 | 380 | { |
87c22ea5 PE |
381 | const void *bc = nla_data(_bc); |
382 | int len = nla_len(_bc); | |
383 | ||
1da177e4 LT |
384 | while (len > 0) { |
385 | int yes = 1; | |
73c1f4a0 | 386 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
387 | |
388 | switch (op->code) { | |
73c1f4a0 | 389 | case INET_DIAG_BC_NOP: |
1da177e4 | 390 | break; |
73c1f4a0 | 391 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
392 | yes = 0; |
393 | break; | |
73c1f4a0 | 394 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
395 | yes = entry->sport >= op[1].no; |
396 | break; | |
73c1f4a0 | 397 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 398 | yes = entry->sport <= op[1].no; |
1da177e4 | 399 | break; |
73c1f4a0 | 400 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
401 | yes = entry->dport >= op[1].no; |
402 | break; | |
73c1f4a0 | 403 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
404 | yes = entry->dport <= op[1].no; |
405 | break; | |
73c1f4a0 | 406 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
407 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
408 | break; | |
73c1f4a0 | 409 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
410 | case INET_DIAG_BC_D_COND: { |
411 | struct inet_diag_hostcond *cond; | |
9f855299 | 412 | __be32 *addr; |
1da177e4 | 413 | |
a8c2190e | 414 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 415 | if (cond->port != -1 && |
73c1f4a0 | 416 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
417 | entry->sport : entry->dport)) { |
418 | yes = 0; | |
419 | break; | |
420 | } | |
4e852c02 | 421 | |
1da177e4 LT |
422 | if (cond->prefix_len == 0) |
423 | break; | |
424 | ||
73c1f4a0 | 425 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
426 | addr = entry->saddr; |
427 | else | |
428 | addr = entry->daddr; | |
429 | ||
4e852c02 ACM |
430 | if (bitstring_match(addr, cond->addr, |
431 | cond->prefix_len)) | |
1da177e4 LT |
432 | break; |
433 | if (entry->family == AF_INET6 && | |
434 | cond->family == AF_INET) { | |
435 | if (addr[0] == 0 && addr[1] == 0 && | |
436 | addr[2] == htonl(0xffff) && | |
a8c2190e | 437 | bitstring_match(addr + 3, cond->addr, |
e905a9ed | 438 | cond->prefix_len)) |
1da177e4 LT |
439 | break; |
440 | } | |
441 | yes = 0; | |
442 | break; | |
443 | } | |
444 | } | |
445 | ||
4e852c02 | 446 | if (yes) { |
1da177e4 LT |
447 | len -= op->yes; |
448 | bc += op->yes; | |
449 | } else { | |
450 | len -= op->no; | |
451 | bc += op->no; | |
452 | } | |
453 | } | |
a02cec21 | 454 | return len == 0; |
1da177e4 LT |
455 | } |
456 | ||
8d07d151 PE |
457 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
458 | { | |
459 | struct inet_diag_entry entry; | |
460 | struct inet_sock *inet = inet_sk(sk); | |
461 | ||
462 | if (bc == NULL) | |
463 | return 1; | |
464 | ||
465 | entry.family = sk->sk_family; | |
dfd56b8b | 466 | #if IS_ENABLED(CONFIG_IPV6) |
8d07d151 PE |
467 | if (entry.family == AF_INET6) { |
468 | struct ipv6_pinfo *np = inet6_sk(sk); | |
469 | ||
470 | entry.saddr = np->rcv_saddr.s6_addr32; | |
471 | entry.daddr = np->daddr.s6_addr32; | |
472 | } else | |
473 | #endif | |
474 | { | |
475 | entry.saddr = &inet->inet_rcv_saddr; | |
476 | entry.daddr = &inet->inet_daddr; | |
477 | } | |
478 | entry.sport = inet->inet_num; | |
479 | entry.dport = ntohs(inet->inet_dport); | |
480 | entry.userlocks = sk->sk_userlocks; | |
481 | ||
482 | return inet_diag_bc_run(bc, &entry); | |
483 | } | |
484 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
485 | ||
1da177e4 LT |
486 | static int valid_cc(const void *bc, int len, int cc) |
487 | { | |
488 | while (len >= 0) { | |
73c1f4a0 | 489 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
490 | |
491 | if (cc > len) | |
492 | return 0; | |
493 | if (cc == len) | |
494 | return 1; | |
eeb14972 | 495 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
496 | return 0; |
497 | len -= op->yes; | |
498 | bc += op->yes; | |
499 | } | |
500 | return 0; | |
501 | } | |
502 | ||
73c1f4a0 | 503 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 504 | { |
eeb14972 | 505 | const void *bc = bytecode; |
1da177e4 LT |
506 | int len = bytecode_len; |
507 | ||
508 | while (len > 0) { | |
eeb14972 | 509 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
510 | |
511 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
512 | switch (op->code) { | |
73c1f4a0 ACM |
513 | case INET_DIAG_BC_AUTO: |
514 | case INET_DIAG_BC_S_COND: | |
515 | case INET_DIAG_BC_D_COND: | |
516 | case INET_DIAG_BC_S_GE: | |
517 | case INET_DIAG_BC_S_LE: | |
518 | case INET_DIAG_BC_D_GE: | |
519 | case INET_DIAG_BC_D_LE: | |
73c1f4a0 | 520 | case INET_DIAG_BC_JMP: |
eeb14972 | 521 | if (op->no < 4 || op->no > len + 4 || op->no & 3) |
1da177e4 LT |
522 | return -EINVAL; |
523 | if (op->no < len && | |
a8c2190e | 524 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
525 | return -EINVAL; |
526 | break; | |
73c1f4a0 | 527 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
528 | break; |
529 | default: | |
530 | return -EINVAL; | |
531 | } | |
eeb14972 ED |
532 | if (op->yes < 4 || op->yes > len + 4 || op->yes & 3) |
533 | return -EINVAL; | |
4e852c02 | 534 | bc += op->yes; |
1da177e4 LT |
535 | len -= op->yes; |
536 | } | |
537 | return len == 0 ? 0 : -EINVAL; | |
538 | } | |
539 | ||
dff2c035 ACM |
540 | static int inet_csk_diag_dump(struct sock *sk, |
541 | struct sk_buff *skb, | |
37f352b5 | 542 | struct netlink_callback *cb, |
c8991362 | 543 | struct inet_diag_req_v2 *r, |
37f352b5 | 544 | const struct nlattr *bc) |
1da177e4 | 545 | { |
8d07d151 PE |
546 | if (!inet_diag_bc_sk(bc, sk)) |
547 | return 0; | |
1da177e4 | 548 | |
a029fe26 | 549 | return inet_csk_diag_fill(sk, skb, r, |
dff2c035 ACM |
550 | NETLINK_CB(cb->skb).pid, |
551 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
552 | } |
553 | ||
c7d58aab ACM |
554 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
555 | struct sk_buff *skb, | |
37f352b5 | 556 | struct netlink_callback *cb, |
c8991362 | 557 | struct inet_diag_req_v2 *r, |
37f352b5 | 558 | const struct nlattr *bc) |
c7d58aab | 559 | { |
37f352b5 | 560 | if (bc != NULL) { |
c7d58aab | 561 | struct inet_diag_entry entry; |
c7d58aab ACM |
562 | |
563 | entry.family = tw->tw_family; | |
dfd56b8b | 564 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
565 | if (tw->tw_family == AF_INET6) { |
566 | struct inet6_timewait_sock *tw6 = | |
567 | inet6_twsk((struct sock *)tw); | |
568 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
569 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
570 | } else | |
571 | #endif | |
572 | { | |
573 | entry.saddr = &tw->tw_rcv_saddr; | |
574 | entry.daddr = &tw->tw_daddr; | |
575 | } | |
576 | entry.sport = tw->tw_num; | |
577 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 578 | entry.userlocks = 0; |
c7d58aab | 579 | |
87c22ea5 | 580 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
581 | return 0; |
582 | } | |
583 | ||
a029fe26 | 584 | return inet_twsk_diag_fill(tw, skb, r, |
c7d58aab ACM |
585 | NETLINK_CB(cb->skb).pid, |
586 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
587 | } | |
588 | ||
73c1f4a0 | 589 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
590 | struct request_sock *req, u32 pid, u32 seq, |
591 | const struct nlmsghdr *unlh) | |
1da177e4 | 592 | { |
2e6599cb | 593 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 594 | struct inet_sock *inet = inet_sk(sk); |
27a884dc | 595 | unsigned char *b = skb_tail_pointer(skb); |
73c1f4a0 | 596 | struct inet_diag_msg *r; |
1da177e4 LT |
597 | struct nlmsghdr *nlh; |
598 | long tmo; | |
599 | ||
540722ff | 600 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
601 | nlh->nlmsg_flags = NLM_F_MULTI; |
602 | r = NLMSG_DATA(nlh); | |
603 | ||
73c1f4a0 ACM |
604 | r->idiag_family = sk->sk_family; |
605 | r->idiag_state = TCP_SYN_RECV; | |
606 | r->idiag_timer = 1; | |
607 | r->idiag_retrans = req->retrans; | |
1da177e4 | 608 | |
73c1f4a0 | 609 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 610 | sock_diag_save_cookie(req, r->id.idiag_cookie); |
1da177e4 LT |
611 | |
612 | tmo = req->expires - jiffies; | |
613 | if (tmo < 0) | |
614 | tmo = 0; | |
615 | ||
c720c7e8 | 616 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
617 | r->id.idiag_dport = ireq->rmt_port; |
618 | r->id.idiag_src[0] = ireq->loc_addr; | |
619 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
620 | r->idiag_expires = jiffies_to_msecs(tmo); | |
621 | r->idiag_rqueue = 0; | |
622 | r->idiag_wqueue = 0; | |
623 | r->idiag_uid = sock_i_uid(sk); | |
624 | r->idiag_inode = 0; | |
dfd56b8b | 625 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 626 | if (r->idiag_family == AF_INET6) { |
4e3fd7a0 AD |
627 | *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr; |
628 | *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr; | |
1da177e4 LT |
629 | } |
630 | #endif | |
27a884dc | 631 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
632 | |
633 | return skb->len; | |
634 | ||
635 | nlmsg_failure: | |
dc5fc579 | 636 | nlmsg_trim(skb, b); |
1da177e4 LT |
637 | return -1; |
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; | |
4e852c02 | 728 | |
1da177e4 LT |
729 | s_i = cb->args[1]; |
730 | s_num = num = cb->args[2]; | |
4f5736c4 | 731 | |
1da177e4 | 732 | if (cb->args[0] == 0) { |
73c1f4a0 | 733 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 734 | goto skip_listen_ht; |
540722ff | 735 | |
0f7ff927 | 736 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 737 | struct sock *sk; |
c25eb3bf | 738 | struct hlist_nulls_node *node; |
5caea4ea | 739 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
740 | |
741 | num = 0; | |
5caea4ea ED |
742 | ilb = &hashinfo->listening_hash[i]; |
743 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 744 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
745 | struct inet_sock *inet = inet_sk(sk); |
746 | ||
747 | if (num < s_num) { | |
748 | num++; | |
749 | continue; | |
750 | } | |
751 | ||
d23deaa0 PE |
752 | if (r->sdiag_family != AF_UNSPEC && |
753 | sk->sk_family != r->sdiag_family) | |
754 | goto next_listen; | |
755 | ||
c720c7e8 | 756 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 757 | r->id.idiag_sport) |
1da177e4 LT |
758 | goto next_listen; |
759 | ||
73c1f4a0 ACM |
760 | if (!(r->idiag_states & TCPF_LISTEN) || |
761 | r->id.idiag_dport || | |
1da177e4 LT |
762 | cb->args[3] > 0) |
763 | goto syn_recv; | |
764 | ||
25c4cd2b | 765 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 766 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
767 | goto done; |
768 | } | |
769 | ||
770 | syn_recv: | |
73c1f4a0 | 771 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
772 | goto next_listen; |
773 | ||
25c4cd2b | 774 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 775 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
776 | goto done; |
777 | } | |
778 | ||
779 | next_listen: | |
780 | cb->args[3] = 0; | |
781 | cb->args[4] = 0; | |
782 | ++num; | |
783 | } | |
5caea4ea | 784 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
785 | |
786 | s_num = 0; | |
787 | cb->args[3] = 0; | |
788 | cb->args[4] = 0; | |
789 | } | |
1da177e4 LT |
790 | skip_listen_ht: |
791 | cb->args[0] = 1; | |
792 | s_i = num = s_num = 0; | |
793 | } | |
794 | ||
73c1f4a0 | 795 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 796 | goto out; |
1da177e4 | 797 | |
f373b53b | 798 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 799 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 800 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 801 | struct sock *sk; |
3ab5aee7 | 802 | struct hlist_nulls_node *node; |
1da177e4 | 803 | |
6be547a6 AK |
804 | num = 0; |
805 | ||
3ab5aee7 ED |
806 | if (hlist_nulls_empty(&head->chain) && |
807 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
808 | continue; |
809 | ||
1da177e4 LT |
810 | if (i > s_i) |
811 | s_num = 0; | |
812 | ||
7e3aab4a | 813 | spin_lock_bh(lock); |
3ab5aee7 | 814 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
815 | struct inet_sock *inet = inet_sk(sk); |
816 | ||
817 | if (num < s_num) | |
818 | goto next_normal; | |
73c1f4a0 | 819 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 820 | goto next_normal; |
d23deaa0 PE |
821 | if (r->sdiag_family != AF_UNSPEC && |
822 | sk->sk_family != r->sdiag_family) | |
823 | goto next_normal; | |
c720c7e8 | 824 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 825 | r->id.idiag_sport) |
1da177e4 | 826 | goto next_normal; |
c720c7e8 | 827 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 828 | r->id.idiag_dport) |
1da177e4 | 829 | goto next_normal; |
25c4cd2b | 830 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
7e3aab4a | 831 | spin_unlock_bh(lock); |
1da177e4 LT |
832 | goto done; |
833 | } | |
834 | next_normal: | |
835 | ++num; | |
836 | } | |
837 | ||
73c1f4a0 | 838 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
839 | struct inet_timewait_sock *tw; |
840 | ||
841 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 842 | &head->twchain) { |
1da177e4 LT |
843 | |
844 | if (num < s_num) | |
845 | goto next_dying; | |
d23deaa0 PE |
846 | if (r->sdiag_family != AF_UNSPEC && |
847 | tw->tw_family != r->sdiag_family) | |
848 | goto next_dying; | |
7dbf0755 | 849 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 850 | r->id.idiag_sport) |
1da177e4 | 851 | goto next_dying; |
7dbf0755 | 852 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 853 | r->id.idiag_dport) |
1da177e4 | 854 | goto next_dying; |
25c4cd2b | 855 | if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) { |
7e3aab4a | 856 | spin_unlock_bh(lock); |
1da177e4 LT |
857 | goto done; |
858 | } | |
859 | next_dying: | |
860 | ++num; | |
861 | } | |
862 | } | |
7e3aab4a | 863 | spin_unlock_bh(lock); |
1da177e4 LT |
864 | } |
865 | ||
866 | done: | |
867 | cb->args[1] = i; | |
868 | cb->args[2] = num; | |
efb3cb42 PE |
869 | out: |
870 | ; | |
871 | } | |
1942c518 | 872 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
873 | |
874 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
c8991362 | 875 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
efb3cb42 PE |
876 | { |
877 | const struct inet_diag_handler *handler; | |
878 | ||
879 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
880 | if (!IS_ERR(handler)) | |
1942c518 | 881 | handler->dump(skb, cb, r, bc); |
d523a328 | 882 | inet_diag_unlock_handler(handler); |
efb3cb42 | 883 | |
1da177e4 LT |
884 | return skb->len; |
885 | } | |
886 | ||
25c4cd2b PE |
887 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
888 | { | |
889 | struct nlattr *bc = NULL; | |
c8991362 | 890 | int hdrlen = sizeof(struct inet_diag_req_v2); |
25c4cd2b PE |
891 | |
892 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
893 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
894 | ||
c8991362 | 895 | return __inet_diag_dump(skb, cb, (struct inet_diag_req_v2 *)NLMSG_DATA(cb->nlh), bc); |
25c4cd2b PE |
896 | } |
897 | ||
a029fe26 PE |
898 | static inline int inet_diag_type2proto(int type) |
899 | { | |
900 | switch (type) { | |
901 | case TCPDIAG_GETSOCK: | |
902 | return IPPROTO_TCP; | |
903 | case DCCPDIAG_GETSOCK: | |
904 | return IPPROTO_DCCP; | |
905 | default: | |
906 | return 0; | |
907 | } | |
908 | } | |
909 | ||
25c4cd2b PE |
910 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
911 | { | |
3b09c84c | 912 | struct inet_diag_req *rc = NLMSG_DATA(cb->nlh); |
c8991362 | 913 | struct inet_diag_req_v2 req; |
25c4cd2b | 914 | struct nlattr *bc = NULL; |
3b09c84c | 915 | int hdrlen = sizeof(struct inet_diag_req); |
25c4cd2b | 916 | |
d23deaa0 | 917 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
918 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
919 | req.idiag_ext = rc->idiag_ext; | |
920 | req.idiag_states = rc->idiag_states; | |
921 | req.id = rc->id; | |
922 | ||
923 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
924 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
925 | ||
926 | return __inet_diag_dump(skb, cb, &req, bc); | |
927 | } | |
928 | ||
fe50ce28 PE |
929 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
930 | const struct nlmsghdr *nlh) | |
931 | { | |
3b09c84c | 932 | struct inet_diag_req *rc = NLMSG_DATA(nlh); |
c8991362 | 933 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
934 | |
935 | req.sdiag_family = rc->idiag_family; | |
936 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
937 | req.idiag_ext = rc->idiag_ext; | |
938 | req.idiag_states = rc->idiag_states; | |
939 | req.id = rc->id; | |
940 | ||
941 | return inet_diag_get_exact(in_skb, nlh, &req); | |
942 | } | |
943 | ||
8d34172d | 944 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 945 | { |
3b09c84c | 946 | int hdrlen = sizeof(struct inet_diag_req); |
1da177e4 | 947 | |
ead592ba TG |
948 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
949 | nlmsg_len(nlh) < hdrlen) | |
950 | return -EINVAL; | |
1da177e4 | 951 | |
b8f3ab42 | 952 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
953 | if (nlmsg_attrlen(nlh, hdrlen)) { |
954 | struct nlattr *attr; | |
1da177e4 | 955 | |
ead592ba TG |
956 | attr = nlmsg_find_attr(nlh, hdrlen, |
957 | INET_DIAG_REQ_BYTECODE); | |
958 | if (attr == NULL || | |
959 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
960 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
961 | return -EINVAL; | |
962 | } | |
80d326fa PNA |
963 | { |
964 | struct netlink_dump_control c = { | |
965 | .dump = inet_diag_dump_compat, | |
966 | }; | |
967 | return netlink_dump_start(sock_diag_nlsk, skb, nlh, &c); | |
968 | } | |
1da177e4 | 969 | } |
ead592ba | 970 | |
fe50ce28 | 971 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
972 | } |
973 | ||
d366477a PE |
974 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
975 | { | |
c8991362 | 976 | int hdrlen = sizeof(struct inet_diag_req_v2); |
d366477a PE |
977 | |
978 | if (nlmsg_len(h) < hdrlen) | |
979 | return -EINVAL; | |
980 | ||
981 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
982 | if (nlmsg_attrlen(h, hdrlen)) { |
983 | struct nlattr *attr; | |
984 | attr = nlmsg_find_attr(h, hdrlen, | |
985 | INET_DIAG_REQ_BYTECODE); | |
986 | if (attr == NULL || | |
987 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
988 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
989 | return -EINVAL; | |
990 | } | |
80d326fa PNA |
991 | { |
992 | struct netlink_dump_control c = { | |
993 | .dump = inet_diag_dump, | |
994 | }; | |
995 | return netlink_dump_start(sock_diag_nlsk, skb, h, &c); | |
996 | } | |
d366477a PE |
997 | } |
998 | ||
c8991362 | 999 | return inet_diag_get_exact(skb, h, (struct inet_diag_req_v2 *)NLMSG_DATA(h)); |
d366477a PE |
1000 | } |
1001 | ||
1002 | static struct sock_diag_handler inet_diag_handler = { | |
1003 | .family = AF_INET, | |
1004 | .dump = inet_diag_handler_dump, | |
1005 | }; | |
1006 | ||
1007 | static struct sock_diag_handler inet6_diag_handler = { | |
1008 | .family = AF_INET6, | |
1009 | .dump = inet_diag_handler_dump, | |
1010 | }; | |
1011 | ||
4f5736c4 ACM |
1012 | int inet_diag_register(const struct inet_diag_handler *h) |
1013 | { | |
1014 | const __u16 type = h->idiag_type; | |
1015 | int err = -EINVAL; | |
1016 | ||
f13c95f0 | 1017 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1018 | goto out; |
1019 | ||
d523a328 | 1020 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1021 | err = -EEXIST; |
1022 | if (inet_diag_table[type] == NULL) { | |
1023 | inet_diag_table[type] = h; | |
1024 | err = 0; | |
1025 | } | |
d523a328 | 1026 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1027 | out: |
1028 | return err; | |
1029 | } | |
1030 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1031 | ||
1032 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1033 | { | |
1034 | const __u16 type = h->idiag_type; | |
1035 | ||
f13c95f0 | 1036 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1037 | return; |
1038 | ||
d523a328 | 1039 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1040 | inet_diag_table[type] = NULL; |
d523a328 | 1041 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1042 | } |
1043 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1044 | ||
73c1f4a0 | 1045 | static int __init inet_diag_init(void) |
1da177e4 | 1046 | { |
f13c95f0 | 1047 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1048 | sizeof(struct inet_diag_handler *)); |
1049 | int err = -ENOMEM; | |
1050 | ||
0da974f4 | 1051 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1052 | if (!inet_diag_table) |
1053 | goto out; | |
1054 | ||
d366477a PE |
1055 | err = sock_diag_register(&inet_diag_handler); |
1056 | if (err) | |
1057 | goto out_free_nl; | |
1058 | ||
1059 | err = sock_diag_register(&inet6_diag_handler); | |
1060 | if (err) | |
1061 | goto out_free_inet; | |
1062 | ||
8ef874bf | 1063 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1064 | out: |
1065 | return err; | |
d366477a PE |
1066 | |
1067 | out_free_inet: | |
1068 | sock_diag_unregister(&inet_diag_handler); | |
1069 | out_free_nl: | |
4f5736c4 ACM |
1070 | kfree(inet_diag_table); |
1071 | goto out; | |
1da177e4 LT |
1072 | } |
1073 | ||
73c1f4a0 | 1074 | static void __exit inet_diag_exit(void) |
1da177e4 | 1075 | { |
d366477a PE |
1076 | sock_diag_unregister(&inet6_diag_handler); |
1077 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1078 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1079 | kfree(inet_diag_table); |
1da177e4 LT |
1080 | } |
1081 | ||
73c1f4a0 ACM |
1082 | module_init(inet_diag_init); |
1083 | module_exit(inet_diag_exit); | |
1da177e4 | 1084 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1085 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1086 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |