Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
73c1f4a0 | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 3 | * |
1da177e4 LT |
4 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
172589cc | 12 | #include <linux/kernel.h> |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/random.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1da177e4 LT |
18 | #include <linux/cache.h> |
19 | #include <linux/init.h> | |
20 | #include <linux/time.h> | |
21 | ||
22 | #include <net/icmp.h> | |
23 | #include <net/tcp.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <net/inet_common.h> | |
505cbfc5 ACM |
26 | #include <net/inet_connection_sock.h> |
27 | #include <net/inet_hashtables.h> | |
28 | #include <net/inet_timewait_sock.h> | |
29 | #include <net/inet6_hashtables.h> | |
dc5fc579 | 30 | #include <net/netlink.h> |
1da177e4 LT |
31 | |
32 | #include <linux/inet.h> | |
33 | #include <linux/stddef.h> | |
34 | ||
a8c2190e | 35 | #include <linux/inet_diag.h> |
d366477a | 36 | #include <linux/sock_diag.h> |
1da177e4 | 37 | |
4f5736c4 ACM |
38 | static const struct inet_diag_handler **inet_diag_table; |
39 | ||
73c1f4a0 | 40 | struct inet_diag_entry { |
9f855299 AV |
41 | __be32 *saddr; |
42 | __be32 *daddr; | |
1da177e4 LT |
43 | u16 sport; |
44 | u16 dport; | |
45 | u16 family; | |
46 | u16 userlocks; | |
1c95df85 NC |
47 | #if IS_ENABLED(CONFIG_IPV6) |
48 | struct in6_addr saddr_storage; /* for IPv4-mapped-IPv6 addresses */ | |
49 | struct in6_addr daddr_storage; /* for IPv4-mapped-IPv6 addresses */ | |
50 | #endif | |
1da177e4 LT |
51 | }; |
52 | ||
d523a328 HX |
53 | static DEFINE_MUTEX(inet_diag_table_mutex); |
54 | ||
f13c95f0 | 55 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
d523a328 | 56 | { |
f13c95f0 | 57 | if (!inet_diag_table[proto]) |
aec8dc62 PE |
58 | request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK, |
59 | NETLINK_SOCK_DIAG, AF_INET, proto); | |
d523a328 HX |
60 | |
61 | mutex_lock(&inet_diag_table_mutex); | |
f13c95f0 | 62 | if (!inet_diag_table[proto]) |
d523a328 HX |
63 | return ERR_PTR(-ENOENT); |
64 | ||
f13c95f0 | 65 | return inet_diag_table[proto]; |
d523a328 HX |
66 | } |
67 | ||
68 | static inline void inet_diag_unlock_handler( | |
69 | const struct inet_diag_handler *handler) | |
70 | { | |
71 | mutex_unlock(&inet_diag_table_mutex); | |
72 | } | |
73 | ||
3c4d05c8 | 74 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
c8991362 | 75 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
d06ca956 | 76 | struct user_namespace *user_ns, |
15e47304 | 77 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 | 78 | const struct nlmsghdr *unlh) |
1da177e4 | 79 | { |
463c84b9 | 80 | const struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 81 | struct inet_diag_msg *r; |
1da177e4 | 82 | struct nlmsghdr *nlh; |
6e277ed5 | 83 | struct nlattr *attr; |
4f5736c4 | 84 | void *info = NULL; |
4f5736c4 | 85 | const struct inet_diag_handler *handler; |
a029fe26 | 86 | int ext = req->idiag_ext; |
4f5736c4 | 87 | |
a029fe26 | 88 | handler = inet_diag_table[req->sdiag_protocol]; |
4f5736c4 | 89 | BUG_ON(handler == NULL); |
1da177e4 | 90 | |
15e47304 | 91 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
92 | nlmsg_flags); |
93 | if (!nlh) | |
d106352d | 94 | return -EMSGSIZE; |
4f5736c4 | 95 | |
d106352d | 96 | r = nlmsg_data(nlh); |
c7d58aab ACM |
97 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
98 | ||
73c1f4a0 ACM |
99 | r->idiag_family = sk->sk_family; |
100 | r->idiag_state = sk->sk_state; | |
101 | r->idiag_timer = 0; | |
102 | r->idiag_retrans = 0; | |
1da177e4 | 103 | |
73c1f4a0 | 104 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 105 | sock_diag_save_cookie(sk, r->id.idiag_cookie); |
1da177e4 | 106 | |
c720c7e8 ED |
107 | r->id.idiag_sport = inet->inet_sport; |
108 | r->id.idiag_dport = inet->inet_dport; | |
109 | r->id.idiag_src[0] = inet->inet_rcv_saddr; | |
110 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 111 | |
e4e541a8 PE |
112 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) |
113 | goto errout; | |
114 | ||
717b6d83 MŻ |
115 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
116 | * hence this needs to be included regardless of socket family. | |
117 | */ | |
118 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
6e277ed5 TG |
119 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
120 | goto errout; | |
717b6d83 | 121 | |
dfd56b8b | 122 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 123 | if (r->idiag_family == AF_INET6) { |
b71d1d42 | 124 | const struct ipv6_pinfo *np = inet6_sk(sk); |
1da177e4 | 125 | |
4e3fd7a0 AD |
126 | *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr; |
127 | *(struct in6_addr *)r->id.idiag_dst = np->daddr; | |
6e277ed5 | 128 | |
06236ac3 | 129 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
6e277ed5 TG |
130 | if (nla_put_u8(skb, INET_DIAG_TCLASS, np->tclass) < 0) |
131 | goto errout; | |
1da177e4 LT |
132 | } |
133 | #endif | |
134 | ||
d06ca956 | 135 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
3c4d05c8 PE |
136 | r->idiag_inode = sock_i_ino(sk); |
137 | ||
6e277ed5 TG |
138 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
139 | struct inet_diag_meminfo minfo = { | |
140 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
141 | .idiag_wmem = sk->sk_wmem_queued, | |
142 | .idiag_fmem = sk->sk_forward_alloc, | |
143 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
144 | }; | |
145 | ||
146 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
147 | goto errout; | |
3c4d05c8 PE |
148 | } |
149 | ||
c0636faa PE |
150 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
151 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 152 | goto errout; |
c0636faa | 153 | |
3c4d05c8 | 154 | if (icsk == NULL) { |
62ad6fcd | 155 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
156 | goto out; |
157 | } | |
158 | ||
172589cc | 159 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 160 | |
463c84b9 | 161 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
162 | r->idiag_timer = 1; |
163 | r->idiag_retrans = icsk->icsk_retransmits; | |
164 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 165 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
166 | r->idiag_timer = 4; |
167 | r->idiag_retrans = icsk->icsk_probes_out; | |
168 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 169 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
170 | r->idiag_timer = 2; |
171 | r->idiag_retrans = icsk->icsk_probes_out; | |
172 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 173 | } else { |
73c1f4a0 ACM |
174 | r->idiag_timer = 0; |
175 | r->idiag_expires = 0; | |
1da177e4 LT |
176 | } |
177 | #undef EXPIRES_IN_MS | |
540722ff | 178 | |
6e277ed5 TG |
179 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
180 | attr = nla_reserve(skb, INET_DIAG_INFO, | |
181 | sizeof(struct tcp_info)); | |
182 | if (!attr) | |
183 | goto errout; | |
3c4d05c8 | 184 | |
6e277ed5 | 185 | info = nla_data(attr); |
1da177e4 LT |
186 | } |
187 | ||
6e277ed5 TG |
188 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
189 | if (nla_put_string(skb, INET_DIAG_CONG, | |
190 | icsk->icsk_ca_ops->name) < 0) | |
191 | goto errout; | |
192 | ||
4f5736c4 | 193 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 194 | |
6687e988 ACM |
195 | if (sk->sk_state < TCP_TIME_WAIT && |
196 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
197 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 198 | |
3c4d05c8 | 199 | out: |
6e277ed5 | 200 | return nlmsg_end(skb, nlh); |
1da177e4 | 201 | |
6e277ed5 TG |
202 | errout: |
203 | nlmsg_cancel(skb, nlh); | |
26932566 | 204 | return -EMSGSIZE; |
1da177e4 | 205 | } |
3c4d05c8 PE |
206 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
207 | ||
208 | static int inet_csk_diag_fill(struct sock *sk, | |
c8991362 | 209 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
d06ca956 | 210 | struct user_namespace *user_ns, |
15e47304 | 211 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
212 | const struct nlmsghdr *unlh) |
213 | { | |
214 | return inet_sk_diag_fill(sk, inet_csk(sk), | |
15e47304 | 215 | skb, req, user_ns, portid, seq, nlmsg_flags, unlh); |
3c4d05c8 | 216 | } |
1da177e4 | 217 | |
c7d58aab | 218 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
c8991362 | 219 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
15e47304 | 220 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
221 | const struct nlmsghdr *unlh) |
222 | { | |
223 | long tmo; | |
224 | struct inet_diag_msg *r; | |
6e277ed5 | 225 | struct nlmsghdr *nlh; |
d106352d | 226 | |
15e47304 | 227 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
228 | nlmsg_flags); |
229 | if (!nlh) | |
d106352d | 230 | return -EMSGSIZE; |
c7d58aab | 231 | |
d106352d | 232 | r = nlmsg_data(nlh); |
c7d58aab ACM |
233 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
234 | ||
c7d58aab ACM |
235 | tmo = tw->tw_ttd - jiffies; |
236 | if (tmo < 0) | |
237 | tmo = 0; | |
238 | ||
239 | r->idiag_family = tw->tw_family; | |
c7d58aab ACM |
240 | r->idiag_retrans = 0; |
241 | r->id.idiag_if = tw->tw_bound_dev_if; | |
f65c1b53 | 242 | sock_diag_save_cookie(tw, r->id.idiag_cookie); |
c7d58aab ACM |
243 | r->id.idiag_sport = tw->tw_sport; |
244 | r->id.idiag_dport = tw->tw_dport; | |
245 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
246 | r->id.idiag_dst[0] = tw->tw_daddr; | |
247 | r->idiag_state = tw->tw_substate; | |
248 | r->idiag_timer = 3; | |
172589cc | 249 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
c7d58aab ACM |
250 | r->idiag_rqueue = 0; |
251 | r->idiag_wqueue = 0; | |
252 | r->idiag_uid = 0; | |
253 | r->idiag_inode = 0; | |
dfd56b8b | 254 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
255 | if (tw->tw_family == AF_INET6) { |
256 | const struct inet6_timewait_sock *tw6 = | |
257 | inet6_twsk((struct sock *)tw); | |
258 | ||
4e3fd7a0 AD |
259 | *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr; |
260 | *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr; | |
c7d58aab ACM |
261 | } |
262 | #endif | |
6e277ed5 TG |
263 | |
264 | return nlmsg_end(skb, nlh); | |
c7d58aab ACM |
265 | } |
266 | ||
dff2c035 | 267 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
d06ca956 EB |
268 | struct inet_diag_req_v2 *r, |
269 | struct user_namespace *user_ns, | |
15e47304 | 270 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
271 | const struct nlmsghdr *unlh) |
272 | { | |
273 | if (sk->sk_state == TCP_TIME_WAIT) | |
274 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
15e47304 | 275 | skb, r, portid, seq, nlmsg_flags, |
dff2c035 | 276 | unlh); |
15e47304 | 277 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, nlmsg_flags, unlh); |
dff2c035 ACM |
278 | } |
279 | ||
1942c518 | 280 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
c8991362 | 281 | const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req) |
1da177e4 LT |
282 | { |
283 | int err; | |
284 | struct sock *sk; | |
1da177e4 | 285 | struct sk_buff *rep; |
51d7cccf | 286 | struct net *net = sock_net(in_skb->sk); |
d523a328 | 287 | |
d523a328 | 288 | err = -EINVAL; |
fe50ce28 | 289 | if (req->sdiag_family == AF_INET) { |
51d7cccf | 290 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
291 | req->id.idiag_dport, req->id.idiag_src[0], |
292 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 293 | } |
dfd56b8b | 294 | #if IS_ENABLED(CONFIG_IPV6) |
fe50ce28 | 295 | else if (req->sdiag_family == AF_INET6) { |
51d7cccf | 296 | sk = inet6_lookup(net, hashinfo, |
73c1f4a0 ACM |
297 | (struct in6_addr *)req->id.idiag_dst, |
298 | req->id.idiag_dport, | |
299 | (struct in6_addr *)req->id.idiag_src, | |
300 | req->id.idiag_sport, | |
301 | req->id.idiag_if); | |
1da177e4 LT |
302 | } |
303 | #endif | |
304 | else { | |
476f7dbf | 305 | goto out_nosk; |
1da177e4 LT |
306 | } |
307 | ||
d523a328 | 308 | err = -ENOENT; |
1da177e4 | 309 | if (sk == NULL) |
476f7dbf | 310 | goto out_nosk; |
1da177e4 | 311 | |
f65c1b53 | 312 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 313 | if (err) |
1da177e4 LT |
314 | goto out; |
315 | ||
6e277ed5 TG |
316 | rep = nlmsg_new(sizeof(struct inet_diag_msg) + |
317 | sizeof(struct inet_diag_meminfo) + | |
318 | sizeof(struct tcp_info) + 64, GFP_KERNEL); | |
319 | if (!rep) { | |
320 | err = -ENOMEM; | |
1da177e4 | 321 | goto out; |
6e277ed5 | 322 | } |
1da177e4 | 323 | |
a029fe26 | 324 | err = sk_diag_fill(sk, rep, req, |
d06ca956 | 325 | sk_user_ns(NETLINK_CB(in_skb).ssk), |
15e47304 | 326 | NETLINK_CB(in_skb).portid, |
26932566 PM |
327 | nlh->nlmsg_seq, 0, nlh); |
328 | if (err < 0) { | |
329 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 330 | nlmsg_free(rep); |
26932566 PM |
331 | goto out; |
332 | } | |
15e47304 | 333 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 334 | MSG_DONTWAIT); |
1da177e4 LT |
335 | if (err > 0) |
336 | err = 0; | |
337 | ||
338 | out: | |
339 | if (sk) { | |
340 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 341 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
342 | else |
343 | sock_put(sk); | |
344 | } | |
476f7dbf PE |
345 | out_nosk: |
346 | return err; | |
347 | } | |
1942c518 | 348 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
349 | |
350 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
351 | const struct nlmsghdr *nlh, | |
c8991362 | 352 | struct inet_diag_req_v2 *req) |
476f7dbf PE |
353 | { |
354 | const struct inet_diag_handler *handler; | |
355 | int err; | |
356 | ||
357 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
358 | if (IS_ERR(handler)) | |
359 | err = PTR_ERR(handler); | |
360 | else | |
1942c518 | 361 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 362 | inet_diag_unlock_handler(handler); |
476f7dbf | 363 | |
1da177e4 LT |
364 | return err; |
365 | } | |
366 | ||
9f855299 | 367 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
368 | { |
369 | int words = bits >> 5; | |
370 | ||
371 | bits &= 0x1f; | |
372 | ||
373 | if (words) { | |
374 | if (memcmp(a1, a2, words << 2)) | |
375 | return 0; | |
376 | } | |
377 | if (bits) { | |
9f855299 AV |
378 | __be32 w1, w2; |
379 | __be32 mask; | |
1da177e4 LT |
380 | |
381 | w1 = a1[words]; | |
382 | w2 = a2[words]; | |
383 | ||
384 | mask = htonl((0xffffffff) << (32 - bits)); | |
385 | ||
386 | if ((w1 ^ w2) & mask) | |
387 | return 0; | |
388 | } | |
389 | ||
390 | return 1; | |
391 | } | |
392 | ||
393 | ||
87c22ea5 PE |
394 | static int inet_diag_bc_run(const struct nlattr *_bc, |
395 | const struct inet_diag_entry *entry) | |
1da177e4 | 396 | { |
87c22ea5 PE |
397 | const void *bc = nla_data(_bc); |
398 | int len = nla_len(_bc); | |
399 | ||
1da177e4 LT |
400 | while (len > 0) { |
401 | int yes = 1; | |
73c1f4a0 | 402 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
403 | |
404 | switch (op->code) { | |
73c1f4a0 | 405 | case INET_DIAG_BC_NOP: |
1da177e4 | 406 | break; |
73c1f4a0 | 407 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
408 | yes = 0; |
409 | break; | |
73c1f4a0 | 410 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
411 | yes = entry->sport >= op[1].no; |
412 | break; | |
73c1f4a0 | 413 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 414 | yes = entry->sport <= op[1].no; |
1da177e4 | 415 | break; |
73c1f4a0 | 416 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
417 | yes = entry->dport >= op[1].no; |
418 | break; | |
73c1f4a0 | 419 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
420 | yes = entry->dport <= op[1].no; |
421 | break; | |
73c1f4a0 | 422 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
423 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
424 | break; | |
73c1f4a0 | 425 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
426 | case INET_DIAG_BC_D_COND: { |
427 | struct inet_diag_hostcond *cond; | |
9f855299 | 428 | __be32 *addr; |
1da177e4 | 429 | |
a8c2190e | 430 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 431 | if (cond->port != -1 && |
73c1f4a0 | 432 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
433 | entry->sport : entry->dport)) { |
434 | yes = 0; | |
435 | break; | |
436 | } | |
4e852c02 | 437 | |
73c1f4a0 | 438 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
439 | addr = entry->saddr; |
440 | else | |
441 | addr = entry->daddr; | |
442 | ||
f67caec9 NC |
443 | if (cond->family != AF_UNSPEC && |
444 | cond->family != entry->family) { | |
445 | if (entry->family == AF_INET6 && | |
446 | cond->family == AF_INET) { | |
447 | if (addr[0] == 0 && addr[1] == 0 && | |
448 | addr[2] == htonl(0xffff) && | |
449 | bitstring_match(addr + 3, | |
450 | cond->addr, | |
451 | cond->prefix_len)) | |
452 | break; | |
453 | } | |
454 | yes = 0; | |
455 | break; | |
456 | } | |
457 | ||
458 | if (cond->prefix_len == 0) | |
459 | break; | |
4e852c02 ACM |
460 | if (bitstring_match(addr, cond->addr, |
461 | cond->prefix_len)) | |
1da177e4 | 462 | break; |
1da177e4 LT |
463 | yes = 0; |
464 | break; | |
465 | } | |
466 | } | |
467 | ||
4e852c02 | 468 | if (yes) { |
1da177e4 LT |
469 | len -= op->yes; |
470 | bc += op->yes; | |
471 | } else { | |
472 | len -= op->no; | |
473 | bc += op->no; | |
474 | } | |
475 | } | |
a02cec21 | 476 | return len == 0; |
1da177e4 LT |
477 | } |
478 | ||
8d07d151 PE |
479 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
480 | { | |
481 | struct inet_diag_entry entry; | |
482 | struct inet_sock *inet = inet_sk(sk); | |
483 | ||
484 | if (bc == NULL) | |
485 | return 1; | |
486 | ||
487 | entry.family = sk->sk_family; | |
dfd56b8b | 488 | #if IS_ENABLED(CONFIG_IPV6) |
8d07d151 PE |
489 | if (entry.family == AF_INET6) { |
490 | struct ipv6_pinfo *np = inet6_sk(sk); | |
491 | ||
492 | entry.saddr = np->rcv_saddr.s6_addr32; | |
493 | entry.daddr = np->daddr.s6_addr32; | |
494 | } else | |
495 | #endif | |
496 | { | |
497 | entry.saddr = &inet->inet_rcv_saddr; | |
498 | entry.daddr = &inet->inet_daddr; | |
499 | } | |
500 | entry.sport = inet->inet_num; | |
501 | entry.dport = ntohs(inet->inet_dport); | |
502 | entry.userlocks = sk->sk_userlocks; | |
503 | ||
504 | return inet_diag_bc_run(bc, &entry); | |
505 | } | |
506 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
507 | ||
1da177e4 LT |
508 | static int valid_cc(const void *bc, int len, int cc) |
509 | { | |
510 | while (len >= 0) { | |
73c1f4a0 | 511 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
512 | |
513 | if (cc > len) | |
514 | return 0; | |
515 | if (cc == len) | |
516 | return 1; | |
eeb14972 | 517 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
518 | return 0; |
519 | len -= op->yes; | |
520 | bc += op->yes; | |
521 | } | |
522 | return 0; | |
523 | } | |
524 | ||
405c0059 NC |
525 | /* Validate an inet_diag_hostcond. */ |
526 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
527 | int *min_len) | |
528 | { | |
529 | int addr_len; | |
530 | struct inet_diag_hostcond *cond; | |
531 | ||
532 | /* Check hostcond space. */ | |
533 | *min_len += sizeof(struct inet_diag_hostcond); | |
534 | if (len < *min_len) | |
535 | return false; | |
536 | cond = (struct inet_diag_hostcond *)(op + 1); | |
537 | ||
538 | /* Check address family and address length. */ | |
539 | switch (cond->family) { | |
540 | case AF_UNSPEC: | |
541 | addr_len = 0; | |
542 | break; | |
543 | case AF_INET: | |
544 | addr_len = sizeof(struct in_addr); | |
545 | break; | |
546 | case AF_INET6: | |
547 | addr_len = sizeof(struct in6_addr); | |
548 | break; | |
549 | default: | |
550 | return false; | |
551 | } | |
552 | *min_len += addr_len; | |
553 | if (len < *min_len) | |
554 | return false; | |
555 | ||
556 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
557 | if (cond->prefix_len > 8 * addr_len) | |
558 | return false; | |
559 | ||
560 | return true; | |
561 | } | |
562 | ||
5e1f5420 NC |
563 | /* Validate a port comparison operator. */ |
564 | static inline bool valid_port_comparison(const struct inet_diag_bc_op *op, | |
565 | int len, int *min_len) | |
566 | { | |
567 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
568 | *min_len += sizeof(struct inet_diag_bc_op); | |
569 | if (len < *min_len) | |
570 | return false; | |
571 | return true; | |
572 | } | |
573 | ||
73c1f4a0 | 574 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 575 | { |
eeb14972 | 576 | const void *bc = bytecode; |
1da177e4 LT |
577 | int len = bytecode_len; |
578 | ||
579 | while (len > 0) { | |
eeb14972 | 580 | const struct inet_diag_bc_op *op = bc; |
405c0059 | 581 | int min_len = sizeof(struct inet_diag_bc_op); |
1da177e4 LT |
582 | |
583 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
584 | switch (op->code) { | |
73c1f4a0 ACM |
585 | case INET_DIAG_BC_S_COND: |
586 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
587 | if (!valid_hostcond(bc, len, &min_len)) |
588 | return -EINVAL; | |
5e1f5420 | 589 | break; |
73c1f4a0 ACM |
590 | case INET_DIAG_BC_S_GE: |
591 | case INET_DIAG_BC_S_LE: | |
592 | case INET_DIAG_BC_D_GE: | |
593 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 594 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
595 | return -EINVAL; |
596 | break; | |
5e1f5420 NC |
597 | case INET_DIAG_BC_AUTO: |
598 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 599 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
600 | break; |
601 | default: | |
602 | return -EINVAL; | |
603 | } | |
5e1f5420 NC |
604 | |
605 | if (op->code != INET_DIAG_BC_NOP) { | |
606 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
607 | return -EINVAL; | |
608 | if (op->no < len && | |
609 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
610 | return -EINVAL; | |
611 | } | |
612 | ||
405c0059 | 613 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 614 | return -EINVAL; |
4e852c02 | 615 | bc += op->yes; |
1da177e4 LT |
616 | len -= op->yes; |
617 | } | |
618 | return len == 0 ? 0 : -EINVAL; | |
619 | } | |
620 | ||
dff2c035 ACM |
621 | static int inet_csk_diag_dump(struct sock *sk, |
622 | struct sk_buff *skb, | |
37f352b5 | 623 | struct netlink_callback *cb, |
c8991362 | 624 | struct inet_diag_req_v2 *r, |
37f352b5 | 625 | const struct nlattr *bc) |
1da177e4 | 626 | { |
8d07d151 PE |
627 | if (!inet_diag_bc_sk(bc, sk)) |
628 | return 0; | |
1da177e4 | 629 | |
a029fe26 | 630 | return inet_csk_diag_fill(sk, skb, r, |
d06ca956 | 631 | sk_user_ns(NETLINK_CB(cb->skb).ssk), |
15e47304 | 632 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 633 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
634 | } |
635 | ||
c7d58aab ACM |
636 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
637 | struct sk_buff *skb, | |
37f352b5 | 638 | struct netlink_callback *cb, |
c8991362 | 639 | struct inet_diag_req_v2 *r, |
37f352b5 | 640 | const struct nlattr *bc) |
c7d58aab | 641 | { |
37f352b5 | 642 | if (bc != NULL) { |
c7d58aab | 643 | struct inet_diag_entry entry; |
c7d58aab ACM |
644 | |
645 | entry.family = tw->tw_family; | |
dfd56b8b | 646 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab ACM |
647 | if (tw->tw_family == AF_INET6) { |
648 | struct inet6_timewait_sock *tw6 = | |
649 | inet6_twsk((struct sock *)tw); | |
650 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
651 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
652 | } else | |
653 | #endif | |
654 | { | |
655 | entry.saddr = &tw->tw_rcv_saddr; | |
656 | entry.daddr = &tw->tw_daddr; | |
657 | } | |
658 | entry.sport = tw->tw_num; | |
659 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 660 | entry.userlocks = 0; |
c7d58aab | 661 | |
87c22ea5 | 662 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
663 | return 0; |
664 | } | |
665 | ||
a029fe26 | 666 | return inet_twsk_diag_fill(tw, skb, r, |
15e47304 | 667 | NETLINK_CB(cb->skb).portid, |
c7d58aab ACM |
668 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
669 | } | |
670 | ||
1c95df85 NC |
671 | /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses |
672 | * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6. | |
673 | */ | |
674 | static inline void inet_diag_req_addrs(const struct sock *sk, | |
675 | const struct request_sock *req, | |
676 | struct inet_diag_entry *entry) | |
677 | { | |
678 | struct inet_request_sock *ireq = inet_rsk(req); | |
679 | ||
680 | #if IS_ENABLED(CONFIG_IPV6) | |
681 | if (sk->sk_family == AF_INET6) { | |
682 | if (req->rsk_ops->family == AF_INET6) { | |
683 | entry->saddr = inet6_rsk(req)->loc_addr.s6_addr32; | |
684 | entry->daddr = inet6_rsk(req)->rmt_addr.s6_addr32; | |
685 | } else if (req->rsk_ops->family == AF_INET) { | |
686 | ipv6_addr_set_v4mapped(ireq->loc_addr, | |
687 | &entry->saddr_storage); | |
688 | ipv6_addr_set_v4mapped(ireq->rmt_addr, | |
689 | &entry->daddr_storage); | |
690 | entry->saddr = entry->saddr_storage.s6_addr32; | |
691 | entry->daddr = entry->daddr_storage.s6_addr32; | |
692 | } | |
693 | } else | |
694 | #endif | |
695 | { | |
696 | entry->saddr = &ireq->loc_addr; | |
697 | entry->daddr = &ireq->rmt_addr; | |
698 | } | |
699 | } | |
700 | ||
73c1f4a0 | 701 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
d06ca956 EB |
702 | struct request_sock *req, |
703 | struct user_namespace *user_ns, | |
15e47304 | 704 | u32 portid, u32 seq, |
4e852c02 | 705 | const struct nlmsghdr *unlh) |
1da177e4 | 706 | { |
2e6599cb | 707 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 708 | struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 709 | struct inet_diag_msg *r; |
1da177e4 LT |
710 | struct nlmsghdr *nlh; |
711 | long tmo; | |
712 | ||
15e47304 | 713 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
714 | NLM_F_MULTI); |
715 | if (!nlh) | |
716 | return -EMSGSIZE; | |
1da177e4 | 717 | |
6e277ed5 | 718 | r = nlmsg_data(nlh); |
73c1f4a0 ACM |
719 | r->idiag_family = sk->sk_family; |
720 | r->idiag_state = TCP_SYN_RECV; | |
721 | r->idiag_timer = 1; | |
e6c022a4 | 722 | r->idiag_retrans = req->num_retrans; |
1da177e4 | 723 | |
73c1f4a0 | 724 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 725 | sock_diag_save_cookie(req, r->id.idiag_cookie); |
1da177e4 LT |
726 | |
727 | tmo = req->expires - jiffies; | |
728 | if (tmo < 0) | |
729 | tmo = 0; | |
730 | ||
c720c7e8 | 731 | r->id.idiag_sport = inet->inet_sport; |
73c1f4a0 ACM |
732 | r->id.idiag_dport = ireq->rmt_port; |
733 | r->id.idiag_src[0] = ireq->loc_addr; | |
734 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
735 | r->idiag_expires = jiffies_to_msecs(tmo); | |
736 | r->idiag_rqueue = 0; | |
737 | r->idiag_wqueue = 0; | |
d06ca956 | 738 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
73c1f4a0 | 739 | r->idiag_inode = 0; |
dfd56b8b | 740 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 741 | if (r->idiag_family == AF_INET6) { |
1c95df85 NC |
742 | struct inet_diag_entry entry; |
743 | inet_diag_req_addrs(sk, req, &entry); | |
744 | memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr)); | |
745 | memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr)); | |
1da177e4 LT |
746 | } |
747 | #endif | |
1da177e4 | 748 | |
6e277ed5 | 749 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
750 | } |
751 | ||
73c1f4a0 | 752 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 753 | struct netlink_callback *cb, |
c8991362 | 754 | struct inet_diag_req_v2 *r, |
37f352b5 | 755 | const struct nlattr *bc) |
1da177e4 | 756 | { |
73c1f4a0 | 757 | struct inet_diag_entry entry; |
463c84b9 | 758 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 759 | struct listen_sock *lopt; |
1da177e4 LT |
760 | struct inet_sock *inet = inet_sk(sk); |
761 | int j, s_j; | |
762 | int reqnum, s_reqnum; | |
763 | int err = 0; | |
764 | ||
765 | s_j = cb->args[3]; | |
766 | s_reqnum = cb->args[4]; | |
767 | ||
768 | if (s_j > 0) | |
769 | s_j--; | |
770 | ||
771 | entry.family = sk->sk_family; | |
772 | ||
463c84b9 | 773 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 774 | |
463c84b9 | 775 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
776 | if (!lopt || !lopt->qlen) |
777 | goto out; | |
778 | ||
37f352b5 | 779 | if (bc != NULL) { |
c720c7e8 | 780 | entry.sport = inet->inet_num; |
1da177e4 LT |
781 | entry.userlocks = sk->sk_userlocks; |
782 | } | |
783 | ||
540722ff | 784 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 785 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
786 | |
787 | reqnum = 0; | |
788 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
789 | struct inet_request_sock *ireq = inet_rsk(req); |
790 | ||
1da177e4 LT |
791 | if (reqnum < s_reqnum) |
792 | continue; | |
73c1f4a0 ACM |
793 | if (r->id.idiag_dport != ireq->rmt_port && |
794 | r->id.idiag_dport) | |
1da177e4 LT |
795 | continue; |
796 | ||
797 | if (bc) { | |
1c95df85 | 798 | inet_diag_req_addrs(sk, req, &entry); |
2e6599cb | 799 | entry.dport = ntohs(ireq->rmt_port); |
1da177e4 | 800 | |
87c22ea5 | 801 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
802 | continue; |
803 | } | |
804 | ||
73c1f4a0 | 805 | err = inet_diag_fill_req(skb, sk, req, |
d06ca956 | 806 | sk_user_ns(NETLINK_CB(cb->skb).ssk), |
15e47304 | 807 | NETLINK_CB(cb->skb).portid, |
540722ff | 808 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
809 | if (err < 0) { |
810 | cb->args[3] = j + 1; | |
811 | cb->args[4] = reqnum; | |
812 | goto out; | |
813 | } | |
814 | } | |
815 | ||
816 | s_reqnum = 0; | |
817 | } | |
818 | ||
819 | out: | |
463c84b9 | 820 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
821 | |
822 | return err; | |
823 | } | |
824 | ||
1942c518 | 825 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
c8991362 | 826 | struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 LT |
827 | { |
828 | int i, num; | |
829 | int s_i, s_num; | |
51d7cccf | 830 | struct net *net = sock_net(skb->sk); |
4e852c02 | 831 | |
1da177e4 LT |
832 | s_i = cb->args[1]; |
833 | s_num = num = cb->args[2]; | |
4f5736c4 | 834 | |
1da177e4 | 835 | if (cb->args[0] == 0) { |
73c1f4a0 | 836 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 837 | goto skip_listen_ht; |
540722ff | 838 | |
0f7ff927 | 839 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 840 | struct sock *sk; |
c25eb3bf | 841 | struct hlist_nulls_node *node; |
5caea4ea | 842 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
843 | |
844 | num = 0; | |
5caea4ea ED |
845 | ilb = &hashinfo->listening_hash[i]; |
846 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 847 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
848 | struct inet_sock *inet = inet_sk(sk); |
849 | ||
51d7cccf AV |
850 | if (!net_eq(sock_net(sk), net)) |
851 | continue; | |
852 | ||
1da177e4 LT |
853 | if (num < s_num) { |
854 | num++; | |
855 | continue; | |
856 | } | |
857 | ||
d23deaa0 PE |
858 | if (r->sdiag_family != AF_UNSPEC && |
859 | sk->sk_family != r->sdiag_family) | |
860 | goto next_listen; | |
861 | ||
c720c7e8 | 862 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 863 | r->id.idiag_sport) |
1da177e4 LT |
864 | goto next_listen; |
865 | ||
73c1f4a0 ACM |
866 | if (!(r->idiag_states & TCPF_LISTEN) || |
867 | r->id.idiag_dport || | |
1da177e4 LT |
868 | cb->args[3] > 0) |
869 | goto syn_recv; | |
870 | ||
25c4cd2b | 871 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 872 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
873 | goto done; |
874 | } | |
875 | ||
876 | syn_recv: | |
73c1f4a0 | 877 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
878 | goto next_listen; |
879 | ||
25c4cd2b | 880 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 881 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
882 | goto done; |
883 | } | |
884 | ||
885 | next_listen: | |
886 | cb->args[3] = 0; | |
887 | cb->args[4] = 0; | |
888 | ++num; | |
889 | } | |
5caea4ea | 890 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
891 | |
892 | s_num = 0; | |
893 | cb->args[3] = 0; | |
894 | cb->args[4] = 0; | |
895 | } | |
1da177e4 LT |
896 | skip_listen_ht: |
897 | cb->args[0] = 1; | |
898 | s_i = num = s_num = 0; | |
899 | } | |
900 | ||
73c1f4a0 | 901 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 902 | goto out; |
1da177e4 | 903 | |
f373b53b | 904 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 905 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 906 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 907 | struct sock *sk; |
3ab5aee7 | 908 | struct hlist_nulls_node *node; |
1da177e4 | 909 | |
6be547a6 AK |
910 | num = 0; |
911 | ||
3ab5aee7 ED |
912 | if (hlist_nulls_empty(&head->chain) && |
913 | hlist_nulls_empty(&head->twchain)) | |
6be547a6 AK |
914 | continue; |
915 | ||
1da177e4 LT |
916 | if (i > s_i) |
917 | s_num = 0; | |
918 | ||
7e3aab4a | 919 | spin_lock_bh(lock); |
3ab5aee7 | 920 | sk_nulls_for_each(sk, node, &head->chain) { |
1da177e4 LT |
921 | struct inet_sock *inet = inet_sk(sk); |
922 | ||
51d7cccf AV |
923 | if (!net_eq(sock_net(sk), net)) |
924 | continue; | |
1da177e4 LT |
925 | if (num < s_num) |
926 | goto next_normal; | |
73c1f4a0 | 927 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 928 | goto next_normal; |
d23deaa0 PE |
929 | if (r->sdiag_family != AF_UNSPEC && |
930 | sk->sk_family != r->sdiag_family) | |
931 | goto next_normal; | |
c720c7e8 | 932 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 933 | r->id.idiag_sport) |
1da177e4 | 934 | goto next_normal; |
c720c7e8 | 935 | if (r->id.idiag_dport != inet->inet_dport && |
4e852c02 | 936 | r->id.idiag_dport) |
1da177e4 | 937 | goto next_normal; |
25c4cd2b | 938 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
7e3aab4a | 939 | spin_unlock_bh(lock); |
1da177e4 LT |
940 | goto done; |
941 | } | |
942 | next_normal: | |
943 | ++num; | |
944 | } | |
945 | ||
73c1f4a0 | 946 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
947 | struct inet_timewait_sock *tw; |
948 | ||
949 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 950 | &head->twchain) { |
51d7cccf AV |
951 | if (!net_eq(twsk_net(tw), net)) |
952 | continue; | |
1da177e4 LT |
953 | |
954 | if (num < s_num) | |
955 | goto next_dying; | |
d23deaa0 PE |
956 | if (r->sdiag_family != AF_UNSPEC && |
957 | tw->tw_family != r->sdiag_family) | |
958 | goto next_dying; | |
7dbf0755 | 959 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 960 | r->id.idiag_sport) |
1da177e4 | 961 | goto next_dying; |
7dbf0755 | 962 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 963 | r->id.idiag_dport) |
1da177e4 | 964 | goto next_dying; |
25c4cd2b | 965 | if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) { |
7e3aab4a | 966 | spin_unlock_bh(lock); |
1da177e4 LT |
967 | goto done; |
968 | } | |
969 | next_dying: | |
970 | ++num; | |
971 | } | |
972 | } | |
7e3aab4a | 973 | spin_unlock_bh(lock); |
1da177e4 LT |
974 | } |
975 | ||
976 | done: | |
977 | cb->args[1] = i; | |
978 | cb->args[2] = num; | |
efb3cb42 PE |
979 | out: |
980 | ; | |
981 | } | |
1942c518 | 982 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
983 | |
984 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
c8991362 | 985 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
efb3cb42 PE |
986 | { |
987 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 988 | int err = 0; |
efb3cb42 PE |
989 | |
990 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
991 | if (!IS_ERR(handler)) | |
1942c518 | 992 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
993 | else |
994 | err = PTR_ERR(handler); | |
d523a328 | 995 | inet_diag_unlock_handler(handler); |
efb3cb42 | 996 | |
cacb6ba0 | 997 | return err ? : skb->len; |
1da177e4 LT |
998 | } |
999 | ||
25c4cd2b PE |
1000 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1001 | { | |
1002 | struct nlattr *bc = NULL; | |
c8991362 | 1003 | int hdrlen = sizeof(struct inet_diag_req_v2); |
25c4cd2b PE |
1004 | |
1005 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1006 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1007 | ||
d106352d | 1008 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
1009 | } |
1010 | ||
a029fe26 PE |
1011 | static inline int inet_diag_type2proto(int type) |
1012 | { | |
1013 | switch (type) { | |
1014 | case TCPDIAG_GETSOCK: | |
1015 | return IPPROTO_TCP; | |
1016 | case DCCPDIAG_GETSOCK: | |
1017 | return IPPROTO_DCCP; | |
1018 | default: | |
1019 | return 0; | |
1020 | } | |
1021 | } | |
1022 | ||
25c4cd2b PE |
1023 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
1024 | { | |
d106352d | 1025 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
c8991362 | 1026 | struct inet_diag_req_v2 req; |
25c4cd2b | 1027 | struct nlattr *bc = NULL; |
3b09c84c | 1028 | int hdrlen = sizeof(struct inet_diag_req); |
25c4cd2b | 1029 | |
d23deaa0 | 1030 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
1031 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
1032 | req.idiag_ext = rc->idiag_ext; | |
1033 | req.idiag_states = rc->idiag_states; | |
1034 | req.id = rc->id; | |
1035 | ||
1036 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1037 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1038 | ||
1039 | return __inet_diag_dump(skb, cb, &req, bc); | |
1040 | } | |
1041 | ||
fe50ce28 PE |
1042 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
1043 | const struct nlmsghdr *nlh) | |
1044 | { | |
d106352d | 1045 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 1046 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
1047 | |
1048 | req.sdiag_family = rc->idiag_family; | |
1049 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
1050 | req.idiag_ext = rc->idiag_ext; | |
1051 | req.idiag_states = rc->idiag_states; | |
1052 | req.id = rc->id; | |
1053 | ||
1054 | return inet_diag_get_exact(in_skb, nlh, &req); | |
1055 | } | |
1056 | ||
8d34172d | 1057 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1058 | { |
3b09c84c | 1059 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 1060 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1061 | |
ead592ba TG |
1062 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
1063 | nlmsg_len(nlh) < hdrlen) | |
1064 | return -EINVAL; | |
1da177e4 | 1065 | |
b8f3ab42 | 1066 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1067 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1068 | struct nlattr *attr; | |
1da177e4 | 1069 | |
ead592ba TG |
1070 | attr = nlmsg_find_attr(nlh, hdrlen, |
1071 | INET_DIAG_REQ_BYTECODE); | |
1072 | if (attr == NULL || | |
1073 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
1074 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1075 | return -EINVAL; | |
1076 | } | |
80d326fa PNA |
1077 | { |
1078 | struct netlink_dump_control c = { | |
1079 | .dump = inet_diag_dump_compat, | |
1080 | }; | |
51d7cccf | 1081 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1082 | } |
1da177e4 | 1083 | } |
ead592ba | 1084 | |
fe50ce28 | 1085 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1086 | } |
1087 | ||
d366477a PE |
1088 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
1089 | { | |
c8991362 | 1090 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1091 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1092 | |
1093 | if (nlmsg_len(h) < hdrlen) | |
1094 | return -EINVAL; | |
1095 | ||
1096 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1097 | if (nlmsg_attrlen(h, hdrlen)) { |
1098 | struct nlattr *attr; | |
1099 | attr = nlmsg_find_attr(h, hdrlen, | |
1100 | INET_DIAG_REQ_BYTECODE); | |
1101 | if (attr == NULL || | |
1102 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
1103 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1104 | return -EINVAL; | |
1105 | } | |
80d326fa PNA |
1106 | { |
1107 | struct netlink_dump_control c = { | |
1108 | .dump = inet_diag_dump, | |
1109 | }; | |
51d7cccf | 1110 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1111 | } |
d366477a PE |
1112 | } |
1113 | ||
d106352d | 1114 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
d366477a PE |
1115 | } |
1116 | ||
8dcf01fc | 1117 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a PE |
1118 | .family = AF_INET, |
1119 | .dump = inet_diag_handler_dump, | |
1120 | }; | |
1121 | ||
8dcf01fc | 1122 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a PE |
1123 | .family = AF_INET6, |
1124 | .dump = inet_diag_handler_dump, | |
1125 | }; | |
1126 | ||
4f5736c4 ACM |
1127 | int inet_diag_register(const struct inet_diag_handler *h) |
1128 | { | |
1129 | const __u16 type = h->idiag_type; | |
1130 | int err = -EINVAL; | |
1131 | ||
f13c95f0 | 1132 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1133 | goto out; |
1134 | ||
d523a328 | 1135 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1136 | err = -EEXIST; |
1137 | if (inet_diag_table[type] == NULL) { | |
1138 | inet_diag_table[type] = h; | |
1139 | err = 0; | |
1140 | } | |
d523a328 | 1141 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1142 | out: |
1143 | return err; | |
1144 | } | |
1145 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1146 | ||
1147 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1148 | { | |
1149 | const __u16 type = h->idiag_type; | |
1150 | ||
f13c95f0 | 1151 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1152 | return; |
1153 | ||
d523a328 | 1154 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1155 | inet_diag_table[type] = NULL; |
d523a328 | 1156 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1157 | } |
1158 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1159 | ||
73c1f4a0 | 1160 | static int __init inet_diag_init(void) |
1da177e4 | 1161 | { |
f13c95f0 | 1162 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1163 | sizeof(struct inet_diag_handler *)); |
1164 | int err = -ENOMEM; | |
1165 | ||
0da974f4 | 1166 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1167 | if (!inet_diag_table) |
1168 | goto out; | |
1169 | ||
d366477a PE |
1170 | err = sock_diag_register(&inet_diag_handler); |
1171 | if (err) | |
1172 | goto out_free_nl; | |
1173 | ||
1174 | err = sock_diag_register(&inet6_diag_handler); | |
1175 | if (err) | |
1176 | goto out_free_inet; | |
1177 | ||
8ef874bf | 1178 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1179 | out: |
1180 | return err; | |
d366477a PE |
1181 | |
1182 | out_free_inet: | |
1183 | sock_diag_unregister(&inet_diag_handler); | |
1184 | out_free_nl: | |
4f5736c4 ACM |
1185 | kfree(inet_diag_table); |
1186 | goto out; | |
1da177e4 LT |
1187 | } |
1188 | ||
73c1f4a0 | 1189 | static void __exit inet_diag_exit(void) |
1da177e4 | 1190 | { |
d366477a PE |
1191 | sock_diag_unregister(&inet6_diag_handler); |
1192 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1193 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1194 | kfree(inet_diag_table); |
1da177e4 LT |
1195 | } |
1196 | ||
73c1f4a0 ACM |
1197 | module_init(inet_diag_init); |
1198 | module_exit(inet_diag_exit); | |
1da177e4 | 1199 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1200 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1201 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |