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; | |
b1aac815 DB |
109 | |
110 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
111 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
112 | ||
c720c7e8 ED |
113 | r->id.idiag_src[0] = inet->inet_rcv_saddr; |
114 | r->id.idiag_dst[0] = inet->inet_daddr; | |
1da177e4 | 115 | |
e4e541a8 PE |
116 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) |
117 | goto errout; | |
118 | ||
717b6d83 MŻ |
119 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
120 | * hence this needs to be included regardless of socket family. | |
121 | */ | |
122 | if (ext & (1 << (INET_DIAG_TOS - 1))) | |
6e277ed5 TG |
123 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
124 | goto errout; | |
717b6d83 | 125 | |
dfd56b8b | 126 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 127 | if (r->idiag_family == AF_INET6) { |
1da177e4 | 128 | |
efe4208f ED |
129 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; |
130 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; | |
6e277ed5 | 131 | |
06236ac3 | 132 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
efe4208f ED |
133 | if (nla_put_u8(skb, INET_DIAG_TCLASS, |
134 | inet6_sk(sk)->tclass) < 0) | |
6e277ed5 | 135 | goto errout; |
1da177e4 LT |
136 | } |
137 | #endif | |
138 | ||
d06ca956 | 139 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
3c4d05c8 PE |
140 | r->idiag_inode = sock_i_ino(sk); |
141 | ||
6e277ed5 TG |
142 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
143 | struct inet_diag_meminfo minfo = { | |
144 | .idiag_rmem = sk_rmem_alloc_get(sk), | |
145 | .idiag_wmem = sk->sk_wmem_queued, | |
146 | .idiag_fmem = sk->sk_forward_alloc, | |
147 | .idiag_tmem = sk_wmem_alloc_get(sk), | |
148 | }; | |
149 | ||
150 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) | |
151 | goto errout; | |
3c4d05c8 PE |
152 | } |
153 | ||
c0636faa PE |
154 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
155 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) | |
6e277ed5 | 156 | goto errout; |
c0636faa | 157 | |
3c4d05c8 | 158 | if (icsk == NULL) { |
62ad6fcd | 159 | handler->idiag_get_info(sk, r, NULL); |
3c4d05c8 PE |
160 | goto out; |
161 | } | |
162 | ||
172589cc | 163 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
1da177e4 | 164 | |
6ba8a3b1 ND |
165 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
166 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || | |
167 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { | |
73c1f4a0 ACM |
168 | r->idiag_timer = 1; |
169 | r->idiag_retrans = icsk->icsk_retransmits; | |
170 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 171 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
172 | r->idiag_timer = 4; |
173 | r->idiag_retrans = icsk->icsk_probes_out; | |
174 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 175 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
176 | r->idiag_timer = 2; |
177 | r->idiag_retrans = icsk->icsk_probes_out; | |
178 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 179 | } else { |
73c1f4a0 ACM |
180 | r->idiag_timer = 0; |
181 | r->idiag_expires = 0; | |
1da177e4 LT |
182 | } |
183 | #undef EXPIRES_IN_MS | |
540722ff | 184 | |
6e277ed5 TG |
185 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
186 | attr = nla_reserve(skb, INET_DIAG_INFO, | |
187 | sizeof(struct tcp_info)); | |
188 | if (!attr) | |
189 | goto errout; | |
3c4d05c8 | 190 | |
6e277ed5 | 191 | info = nla_data(attr); |
1da177e4 LT |
192 | } |
193 | ||
6e277ed5 TG |
194 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
195 | if (nla_put_string(skb, INET_DIAG_CONG, | |
196 | icsk->icsk_ca_ops->name) < 0) | |
197 | goto errout; | |
198 | ||
4f5736c4 | 199 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 200 | |
6687e988 ACM |
201 | if (sk->sk_state < TCP_TIME_WAIT && |
202 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
203 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 | 204 | |
3c4d05c8 | 205 | out: |
6e277ed5 | 206 | return nlmsg_end(skb, nlh); |
1da177e4 | 207 | |
6e277ed5 TG |
208 | errout: |
209 | nlmsg_cancel(skb, nlh); | |
26932566 | 210 | return -EMSGSIZE; |
1da177e4 | 211 | } |
3c4d05c8 PE |
212 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
213 | ||
214 | static int inet_csk_diag_fill(struct sock *sk, | |
c8991362 | 215 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
d06ca956 | 216 | struct user_namespace *user_ns, |
15e47304 | 217 | u32 portid, u32 seq, u16 nlmsg_flags, |
3c4d05c8 PE |
218 | const struct nlmsghdr *unlh) |
219 | { | |
220 | return inet_sk_diag_fill(sk, inet_csk(sk), | |
15e47304 | 221 | skb, req, user_ns, portid, seq, nlmsg_flags, unlh); |
3c4d05c8 | 222 | } |
1da177e4 | 223 | |
c7d58aab | 224 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
c8991362 | 225 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
15e47304 | 226 | u32 portid, u32 seq, u16 nlmsg_flags, |
c7d58aab ACM |
227 | const struct nlmsghdr *unlh) |
228 | { | |
96f817fe | 229 | s32 tmo; |
c7d58aab | 230 | struct inet_diag_msg *r; |
6e277ed5 | 231 | struct nlmsghdr *nlh; |
d106352d | 232 | |
15e47304 | 233 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
234 | nlmsg_flags); |
235 | if (!nlh) | |
d106352d | 236 | return -EMSGSIZE; |
c7d58aab | 237 | |
d106352d | 238 | r = nlmsg_data(nlh); |
c7d58aab ACM |
239 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
240 | ||
96f817fe | 241 | tmo = tw->tw_ttd - inet_tw_time_stamp(); |
c7d58aab ACM |
242 | if (tmo < 0) |
243 | tmo = 0; | |
244 | ||
245 | r->idiag_family = tw->tw_family; | |
c7d58aab | 246 | r->idiag_retrans = 0; |
b1aac815 | 247 | |
c7d58aab | 248 | r->id.idiag_if = tw->tw_bound_dev_if; |
f65c1b53 | 249 | sock_diag_save_cookie(tw, r->id.idiag_cookie); |
b1aac815 | 250 | |
c7d58aab ACM |
251 | r->id.idiag_sport = tw->tw_sport; |
252 | r->id.idiag_dport = tw->tw_dport; | |
b1aac815 DB |
253 | |
254 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
255 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
256 | ||
c7d58aab ACM |
257 | r->id.idiag_src[0] = tw->tw_rcv_saddr; |
258 | r->id.idiag_dst[0] = tw->tw_daddr; | |
b1aac815 | 259 | |
c7d58aab ACM |
260 | r->idiag_state = tw->tw_substate; |
261 | r->idiag_timer = 3; | |
96f817fe | 262 | r->idiag_expires = jiffies_to_msecs(tmo); |
c7d58aab ACM |
263 | r->idiag_rqueue = 0; |
264 | r->idiag_wqueue = 0; | |
265 | r->idiag_uid = 0; | |
266 | r->idiag_inode = 0; | |
dfd56b8b | 267 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab | 268 | if (tw->tw_family == AF_INET6) { |
efe4208f ED |
269 | *(struct in6_addr *)r->id.idiag_src = tw->tw_v6_rcv_saddr; |
270 | *(struct in6_addr *)r->id.idiag_dst = tw->tw_v6_daddr; | |
c7d58aab ACM |
271 | } |
272 | #endif | |
6e277ed5 TG |
273 | |
274 | return nlmsg_end(skb, nlh); | |
c7d58aab ACM |
275 | } |
276 | ||
dff2c035 | 277 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
d06ca956 EB |
278 | struct inet_diag_req_v2 *r, |
279 | struct user_namespace *user_ns, | |
15e47304 | 280 | u32 portid, u32 seq, u16 nlmsg_flags, |
dff2c035 ACM |
281 | const struct nlmsghdr *unlh) |
282 | { | |
283 | if (sk->sk_state == TCP_TIME_WAIT) | |
efe4208f ED |
284 | return inet_twsk_diag_fill(inet_twsk(sk), skb, r, portid, seq, |
285 | nlmsg_flags, unlh); | |
286 | ||
287 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, | |
288 | nlmsg_flags, unlh); | |
dff2c035 ACM |
289 | } |
290 | ||
1942c518 | 291 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
c8991362 | 292 | const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req) |
1da177e4 LT |
293 | { |
294 | int err; | |
295 | struct sock *sk; | |
1da177e4 | 296 | struct sk_buff *rep; |
51d7cccf | 297 | struct net *net = sock_net(in_skb->sk); |
d523a328 | 298 | |
d523a328 | 299 | err = -EINVAL; |
fe50ce28 | 300 | if (req->sdiag_family == AF_INET) { |
51d7cccf | 301 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
73c1f4a0 ACM |
302 | req->id.idiag_dport, req->id.idiag_src[0], |
303 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 304 | } |
dfd56b8b | 305 | #if IS_ENABLED(CONFIG_IPV6) |
fe50ce28 | 306 | else if (req->sdiag_family == AF_INET6) { |
51d7cccf | 307 | sk = inet6_lookup(net, hashinfo, |
73c1f4a0 ACM |
308 | (struct in6_addr *)req->id.idiag_dst, |
309 | req->id.idiag_dport, | |
310 | (struct in6_addr *)req->id.idiag_src, | |
311 | req->id.idiag_sport, | |
312 | req->id.idiag_if); | |
1da177e4 LT |
313 | } |
314 | #endif | |
315 | else { | |
476f7dbf | 316 | goto out_nosk; |
1da177e4 LT |
317 | } |
318 | ||
d523a328 | 319 | err = -ENOENT; |
1da177e4 | 320 | if (sk == NULL) |
476f7dbf | 321 | goto out_nosk; |
1da177e4 | 322 | |
f65c1b53 | 323 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
b005ab4e | 324 | if (err) |
1da177e4 LT |
325 | goto out; |
326 | ||
6e277ed5 TG |
327 | rep = nlmsg_new(sizeof(struct inet_diag_msg) + |
328 | sizeof(struct inet_diag_meminfo) + | |
329 | sizeof(struct tcp_info) + 64, GFP_KERNEL); | |
330 | if (!rep) { | |
331 | err = -ENOMEM; | |
1da177e4 | 332 | goto out; |
6e277ed5 | 333 | } |
1da177e4 | 334 | |
a029fe26 | 335 | err = sk_diag_fill(sk, rep, req, |
e32123e5 | 336 | sk_user_ns(NETLINK_CB(in_skb).sk), |
15e47304 | 337 | NETLINK_CB(in_skb).portid, |
26932566 PM |
338 | nlh->nlmsg_seq, 0, nlh); |
339 | if (err < 0) { | |
340 | WARN_ON(err == -EMSGSIZE); | |
6e277ed5 | 341 | nlmsg_free(rep); |
26932566 PM |
342 | goto out; |
343 | } | |
15e47304 | 344 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
73c1f4a0 | 345 | MSG_DONTWAIT); |
1da177e4 LT |
346 | if (err > 0) |
347 | err = 0; | |
348 | ||
349 | out: | |
c1d607cc ED |
350 | if (sk) |
351 | sock_gen_put(sk); | |
352 | ||
476f7dbf PE |
353 | out_nosk: |
354 | return err; | |
355 | } | |
1942c518 | 356 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
476f7dbf PE |
357 | |
358 | static int inet_diag_get_exact(struct sk_buff *in_skb, | |
359 | const struct nlmsghdr *nlh, | |
c8991362 | 360 | struct inet_diag_req_v2 *req) |
476f7dbf PE |
361 | { |
362 | const struct inet_diag_handler *handler; | |
363 | int err; | |
364 | ||
365 | handler = inet_diag_lock_handler(req->sdiag_protocol); | |
366 | if (IS_ERR(handler)) | |
367 | err = PTR_ERR(handler); | |
368 | else | |
1942c518 | 369 | err = handler->dump_one(in_skb, nlh, req); |
d523a328 | 370 | inet_diag_unlock_handler(handler); |
476f7dbf | 371 | |
1da177e4 LT |
372 | return err; |
373 | } | |
374 | ||
9f855299 | 375 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
376 | { |
377 | int words = bits >> 5; | |
378 | ||
379 | bits &= 0x1f; | |
380 | ||
381 | if (words) { | |
382 | if (memcmp(a1, a2, words << 2)) | |
383 | return 0; | |
384 | } | |
385 | if (bits) { | |
9f855299 AV |
386 | __be32 w1, w2; |
387 | __be32 mask; | |
1da177e4 LT |
388 | |
389 | w1 = a1[words]; | |
390 | w2 = a2[words]; | |
391 | ||
392 | mask = htonl((0xffffffff) << (32 - bits)); | |
393 | ||
394 | if ((w1 ^ w2) & mask) | |
395 | return 0; | |
396 | } | |
397 | ||
398 | return 1; | |
399 | } | |
400 | ||
401 | ||
87c22ea5 PE |
402 | static int inet_diag_bc_run(const struct nlattr *_bc, |
403 | const struct inet_diag_entry *entry) | |
1da177e4 | 404 | { |
87c22ea5 PE |
405 | const void *bc = nla_data(_bc); |
406 | int len = nla_len(_bc); | |
407 | ||
1da177e4 LT |
408 | while (len > 0) { |
409 | int yes = 1; | |
73c1f4a0 | 410 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
411 | |
412 | switch (op->code) { | |
73c1f4a0 | 413 | case INET_DIAG_BC_NOP: |
1da177e4 | 414 | break; |
73c1f4a0 | 415 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
416 | yes = 0; |
417 | break; | |
73c1f4a0 | 418 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
419 | yes = entry->sport >= op[1].no; |
420 | break; | |
73c1f4a0 | 421 | case INET_DIAG_BC_S_LE: |
b4ced2b7 | 422 | yes = entry->sport <= op[1].no; |
1da177e4 | 423 | break; |
73c1f4a0 | 424 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
425 | yes = entry->dport >= op[1].no; |
426 | break; | |
73c1f4a0 | 427 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
428 | yes = entry->dport <= op[1].no; |
429 | break; | |
73c1f4a0 | 430 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
431 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
432 | break; | |
73c1f4a0 | 433 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
434 | case INET_DIAG_BC_D_COND: { |
435 | struct inet_diag_hostcond *cond; | |
9f855299 | 436 | __be32 *addr; |
1da177e4 | 437 | |
a8c2190e | 438 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 439 | if (cond->port != -1 && |
73c1f4a0 | 440 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
441 | entry->sport : entry->dport)) { |
442 | yes = 0; | |
443 | break; | |
444 | } | |
4e852c02 | 445 | |
73c1f4a0 | 446 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
447 | addr = entry->saddr; |
448 | else | |
449 | addr = entry->daddr; | |
450 | ||
f67caec9 NC |
451 | if (cond->family != AF_UNSPEC && |
452 | cond->family != entry->family) { | |
453 | if (entry->family == AF_INET6 && | |
454 | cond->family == AF_INET) { | |
455 | if (addr[0] == 0 && addr[1] == 0 && | |
456 | addr[2] == htonl(0xffff) && | |
457 | bitstring_match(addr + 3, | |
458 | cond->addr, | |
459 | cond->prefix_len)) | |
460 | break; | |
461 | } | |
462 | yes = 0; | |
463 | break; | |
464 | } | |
465 | ||
466 | if (cond->prefix_len == 0) | |
467 | break; | |
4e852c02 ACM |
468 | if (bitstring_match(addr, cond->addr, |
469 | cond->prefix_len)) | |
1da177e4 | 470 | break; |
1da177e4 LT |
471 | yes = 0; |
472 | break; | |
473 | } | |
474 | } | |
475 | ||
4e852c02 | 476 | if (yes) { |
1da177e4 LT |
477 | len -= op->yes; |
478 | bc += op->yes; | |
479 | } else { | |
480 | len -= op->no; | |
481 | bc += op->no; | |
482 | } | |
483 | } | |
a02cec21 | 484 | return len == 0; |
1da177e4 LT |
485 | } |
486 | ||
8d07d151 PE |
487 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
488 | { | |
489 | struct inet_diag_entry entry; | |
490 | struct inet_sock *inet = inet_sk(sk); | |
491 | ||
492 | if (bc == NULL) | |
493 | return 1; | |
494 | ||
495 | entry.family = sk->sk_family; | |
dfd56b8b | 496 | #if IS_ENABLED(CONFIG_IPV6) |
8d07d151 | 497 | if (entry.family == AF_INET6) { |
8d07d151 | 498 | |
efe4208f ED |
499 | entry.saddr = sk->sk_v6_rcv_saddr.s6_addr32; |
500 | entry.daddr = sk->sk_v6_daddr.s6_addr32; | |
8d07d151 PE |
501 | } else |
502 | #endif | |
503 | { | |
504 | entry.saddr = &inet->inet_rcv_saddr; | |
505 | entry.daddr = &inet->inet_daddr; | |
506 | } | |
507 | entry.sport = inet->inet_num; | |
508 | entry.dport = ntohs(inet->inet_dport); | |
509 | entry.userlocks = sk->sk_userlocks; | |
510 | ||
511 | return inet_diag_bc_run(bc, &entry); | |
512 | } | |
513 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); | |
514 | ||
1da177e4 LT |
515 | static int valid_cc(const void *bc, int len, int cc) |
516 | { | |
517 | while (len >= 0) { | |
73c1f4a0 | 518 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
519 | |
520 | if (cc > len) | |
521 | return 0; | |
522 | if (cc == len) | |
523 | return 1; | |
eeb14972 | 524 | if (op->yes < 4 || op->yes & 3) |
1da177e4 LT |
525 | return 0; |
526 | len -= op->yes; | |
527 | bc += op->yes; | |
528 | } | |
529 | return 0; | |
530 | } | |
531 | ||
405c0059 NC |
532 | /* Validate an inet_diag_hostcond. */ |
533 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, | |
534 | int *min_len) | |
535 | { | |
536 | int addr_len; | |
537 | struct inet_diag_hostcond *cond; | |
538 | ||
539 | /* Check hostcond space. */ | |
540 | *min_len += sizeof(struct inet_diag_hostcond); | |
541 | if (len < *min_len) | |
542 | return false; | |
543 | cond = (struct inet_diag_hostcond *)(op + 1); | |
544 | ||
545 | /* Check address family and address length. */ | |
546 | switch (cond->family) { | |
547 | case AF_UNSPEC: | |
548 | addr_len = 0; | |
549 | break; | |
550 | case AF_INET: | |
551 | addr_len = sizeof(struct in_addr); | |
552 | break; | |
553 | case AF_INET6: | |
554 | addr_len = sizeof(struct in6_addr); | |
555 | break; | |
556 | default: | |
557 | return false; | |
558 | } | |
559 | *min_len += addr_len; | |
560 | if (len < *min_len) | |
561 | return false; | |
562 | ||
563 | /* Check prefix length (in bits) vs address length (in bytes). */ | |
564 | if (cond->prefix_len > 8 * addr_len) | |
565 | return false; | |
566 | ||
567 | return true; | |
568 | } | |
569 | ||
5e1f5420 NC |
570 | /* Validate a port comparison operator. */ |
571 | static inline bool valid_port_comparison(const struct inet_diag_bc_op *op, | |
572 | int len, int *min_len) | |
573 | { | |
574 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ | |
575 | *min_len += sizeof(struct inet_diag_bc_op); | |
576 | if (len < *min_len) | |
577 | return false; | |
578 | return true; | |
579 | } | |
580 | ||
73c1f4a0 | 581 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 | 582 | { |
eeb14972 | 583 | const void *bc = bytecode; |
1da177e4 LT |
584 | int len = bytecode_len; |
585 | ||
586 | while (len > 0) { | |
eeb14972 | 587 | const struct inet_diag_bc_op *op = bc; |
405c0059 | 588 | int min_len = sizeof(struct inet_diag_bc_op); |
1da177e4 LT |
589 | |
590 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
591 | switch (op->code) { | |
73c1f4a0 ACM |
592 | case INET_DIAG_BC_S_COND: |
593 | case INET_DIAG_BC_D_COND: | |
405c0059 NC |
594 | if (!valid_hostcond(bc, len, &min_len)) |
595 | return -EINVAL; | |
5e1f5420 | 596 | break; |
73c1f4a0 ACM |
597 | case INET_DIAG_BC_S_GE: |
598 | case INET_DIAG_BC_S_LE: | |
599 | case INET_DIAG_BC_D_GE: | |
600 | case INET_DIAG_BC_D_LE: | |
5e1f5420 | 601 | if (!valid_port_comparison(bc, len, &min_len)) |
1da177e4 LT |
602 | return -EINVAL; |
603 | break; | |
5e1f5420 NC |
604 | case INET_DIAG_BC_AUTO: |
605 | case INET_DIAG_BC_JMP: | |
73c1f4a0 | 606 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
607 | break; |
608 | default: | |
609 | return -EINVAL; | |
610 | } | |
5e1f5420 NC |
611 | |
612 | if (op->code != INET_DIAG_BC_NOP) { | |
613 | if (op->no < min_len || op->no > len + 4 || op->no & 3) | |
614 | return -EINVAL; | |
615 | if (op->no < len && | |
616 | !valid_cc(bytecode, bytecode_len, len - op->no)) | |
617 | return -EINVAL; | |
618 | } | |
619 | ||
405c0059 | 620 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
eeb14972 | 621 | return -EINVAL; |
4e852c02 | 622 | bc += op->yes; |
1da177e4 LT |
623 | len -= op->yes; |
624 | } | |
625 | return len == 0 ? 0 : -EINVAL; | |
626 | } | |
627 | ||
dff2c035 ACM |
628 | static int inet_csk_diag_dump(struct sock *sk, |
629 | struct sk_buff *skb, | |
37f352b5 | 630 | struct netlink_callback *cb, |
c8991362 | 631 | struct inet_diag_req_v2 *r, |
37f352b5 | 632 | const struct nlattr *bc) |
1da177e4 | 633 | { |
8d07d151 PE |
634 | if (!inet_diag_bc_sk(bc, sk)) |
635 | return 0; | |
1da177e4 | 636 | |
a029fe26 | 637 | return inet_csk_diag_fill(sk, skb, r, |
e32123e5 | 638 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 639 | NETLINK_CB(cb->skb).portid, |
dff2c035 | 640 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
641 | } |
642 | ||
05dbc7b5 | 643 | static int inet_twsk_diag_dump(struct sock *sk, |
c7d58aab | 644 | struct sk_buff *skb, |
37f352b5 | 645 | struct netlink_callback *cb, |
c8991362 | 646 | struct inet_diag_req_v2 *r, |
37f352b5 | 647 | const struct nlattr *bc) |
c7d58aab | 648 | { |
05dbc7b5 ED |
649 | struct inet_timewait_sock *tw = inet_twsk(sk); |
650 | ||
37f352b5 | 651 | if (bc != NULL) { |
c7d58aab | 652 | struct inet_diag_entry entry; |
c7d58aab ACM |
653 | |
654 | entry.family = tw->tw_family; | |
dfd56b8b | 655 | #if IS_ENABLED(CONFIG_IPV6) |
c7d58aab | 656 | if (tw->tw_family == AF_INET6) { |
efe4208f ED |
657 | entry.saddr = tw->tw_v6_rcv_saddr.s6_addr32; |
658 | entry.daddr = tw->tw_v6_daddr.s6_addr32; | |
c7d58aab ACM |
659 | } else |
660 | #endif | |
661 | { | |
662 | entry.saddr = &tw->tw_rcv_saddr; | |
663 | entry.daddr = &tw->tw_daddr; | |
664 | } | |
665 | entry.sport = tw->tw_num; | |
666 | entry.dport = ntohs(tw->tw_dport); | |
e905a9ed | 667 | entry.userlocks = 0; |
c7d58aab | 668 | |
87c22ea5 | 669 | if (!inet_diag_bc_run(bc, &entry)) |
c7d58aab ACM |
670 | return 0; |
671 | } | |
672 | ||
a029fe26 | 673 | return inet_twsk_diag_fill(tw, skb, r, |
15e47304 | 674 | NETLINK_CB(cb->skb).portid, |
c7d58aab ACM |
675 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
676 | } | |
677 | ||
1c95df85 NC |
678 | /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses |
679 | * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6. | |
680 | */ | |
681 | static inline void inet_diag_req_addrs(const struct sock *sk, | |
682 | const struct request_sock *req, | |
683 | struct inet_diag_entry *entry) | |
684 | { | |
685 | struct inet_request_sock *ireq = inet_rsk(req); | |
686 | ||
687 | #if IS_ENABLED(CONFIG_IPV6) | |
688 | if (sk->sk_family == AF_INET6) { | |
689 | if (req->rsk_ops->family == AF_INET6) { | |
634fb979 ED |
690 | entry->saddr = ireq->ir_v6_loc_addr.s6_addr32; |
691 | entry->daddr = ireq->ir_v6_rmt_addr.s6_addr32; | |
1c95df85 | 692 | } else if (req->rsk_ops->family == AF_INET) { |
634fb979 | 693 | ipv6_addr_set_v4mapped(ireq->ir_loc_addr, |
1c95df85 | 694 | &entry->saddr_storage); |
634fb979 | 695 | ipv6_addr_set_v4mapped(ireq->ir_rmt_addr, |
1c95df85 NC |
696 | &entry->daddr_storage); |
697 | entry->saddr = entry->saddr_storage.s6_addr32; | |
698 | entry->daddr = entry->daddr_storage.s6_addr32; | |
699 | } | |
700 | } else | |
701 | #endif | |
702 | { | |
634fb979 ED |
703 | entry->saddr = &ireq->ir_loc_addr; |
704 | entry->daddr = &ireq->ir_rmt_addr; | |
1c95df85 NC |
705 | } |
706 | } | |
707 | ||
73c1f4a0 | 708 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
d06ca956 EB |
709 | struct request_sock *req, |
710 | struct user_namespace *user_ns, | |
15e47304 | 711 | u32 portid, u32 seq, |
4e852c02 | 712 | const struct nlmsghdr *unlh) |
1da177e4 | 713 | { |
2e6599cb | 714 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 | 715 | struct inet_sock *inet = inet_sk(sk); |
73c1f4a0 | 716 | struct inet_diag_msg *r; |
1da177e4 LT |
717 | struct nlmsghdr *nlh; |
718 | long tmo; | |
719 | ||
15e47304 | 720 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
6e277ed5 TG |
721 | NLM_F_MULTI); |
722 | if (!nlh) | |
723 | return -EMSGSIZE; | |
1da177e4 | 724 | |
6e277ed5 | 725 | r = nlmsg_data(nlh); |
73c1f4a0 ACM |
726 | r->idiag_family = sk->sk_family; |
727 | r->idiag_state = TCP_SYN_RECV; | |
728 | r->idiag_timer = 1; | |
e6c022a4 | 729 | r->idiag_retrans = req->num_retrans; |
1da177e4 | 730 | |
73c1f4a0 | 731 | r->id.idiag_if = sk->sk_bound_dev_if; |
f65c1b53 | 732 | sock_diag_save_cookie(req, r->id.idiag_cookie); |
1da177e4 LT |
733 | |
734 | tmo = req->expires - jiffies; | |
735 | if (tmo < 0) | |
736 | tmo = 0; | |
737 | ||
c720c7e8 | 738 | r->id.idiag_sport = inet->inet_sport; |
634fb979 | 739 | r->id.idiag_dport = ireq->ir_rmt_port; |
b1aac815 DB |
740 | |
741 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); | |
742 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); | |
743 | ||
634fb979 ED |
744 | r->id.idiag_src[0] = ireq->ir_loc_addr; |
745 | r->id.idiag_dst[0] = ireq->ir_rmt_addr; | |
b1aac815 | 746 | |
73c1f4a0 ACM |
747 | r->idiag_expires = jiffies_to_msecs(tmo); |
748 | r->idiag_rqueue = 0; | |
749 | r->idiag_wqueue = 0; | |
d06ca956 | 750 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
73c1f4a0 | 751 | r->idiag_inode = 0; |
dfd56b8b | 752 | #if IS_ENABLED(CONFIG_IPV6) |
73c1f4a0 | 753 | if (r->idiag_family == AF_INET6) { |
1c95df85 NC |
754 | struct inet_diag_entry entry; |
755 | inet_diag_req_addrs(sk, req, &entry); | |
756 | memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr)); | |
757 | memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr)); | |
1da177e4 LT |
758 | } |
759 | #endif | |
1da177e4 | 760 | |
6e277ed5 | 761 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
762 | } |
763 | ||
73c1f4a0 | 764 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
37f352b5 | 765 | struct netlink_callback *cb, |
c8991362 | 766 | struct inet_diag_req_v2 *r, |
37f352b5 | 767 | const struct nlattr *bc) |
1da177e4 | 768 | { |
73c1f4a0 | 769 | struct inet_diag_entry entry; |
463c84b9 | 770 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 771 | struct listen_sock *lopt; |
1da177e4 LT |
772 | struct inet_sock *inet = inet_sk(sk); |
773 | int j, s_j; | |
774 | int reqnum, s_reqnum; | |
775 | int err = 0; | |
776 | ||
777 | s_j = cb->args[3]; | |
778 | s_reqnum = cb->args[4]; | |
779 | ||
780 | if (s_j > 0) | |
781 | s_j--; | |
782 | ||
783 | entry.family = sk->sk_family; | |
784 | ||
463c84b9 | 785 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 786 | |
463c84b9 | 787 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
788 | if (!lopt || !lopt->qlen) |
789 | goto out; | |
790 | ||
37f352b5 | 791 | if (bc != NULL) { |
c720c7e8 | 792 | entry.sport = inet->inet_num; |
1da177e4 LT |
793 | entry.userlocks = sk->sk_userlocks; |
794 | } | |
795 | ||
540722ff | 796 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 797 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
798 | |
799 | reqnum = 0; | |
800 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
801 | struct inet_request_sock *ireq = inet_rsk(req); |
802 | ||
1da177e4 LT |
803 | if (reqnum < s_reqnum) |
804 | continue; | |
634fb979 | 805 | if (r->id.idiag_dport != ireq->ir_rmt_port && |
73c1f4a0 | 806 | r->id.idiag_dport) |
1da177e4 LT |
807 | continue; |
808 | ||
809 | if (bc) { | |
1c95df85 | 810 | inet_diag_req_addrs(sk, req, &entry); |
634fb979 | 811 | entry.dport = ntohs(ireq->ir_rmt_port); |
1da177e4 | 812 | |
87c22ea5 | 813 | if (!inet_diag_bc_run(bc, &entry)) |
1da177e4 LT |
814 | continue; |
815 | } | |
816 | ||
73c1f4a0 | 817 | err = inet_diag_fill_req(skb, sk, req, |
e32123e5 | 818 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
15e47304 | 819 | NETLINK_CB(cb->skb).portid, |
540722ff | 820 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
821 | if (err < 0) { |
822 | cb->args[3] = j + 1; | |
823 | cb->args[4] = reqnum; | |
824 | goto out; | |
825 | } | |
826 | } | |
827 | ||
828 | s_reqnum = 0; | |
829 | } | |
830 | ||
831 | out: | |
463c84b9 | 832 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
833 | |
834 | return err; | |
835 | } | |
836 | ||
1942c518 | 837 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
c8991362 | 838 | struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc) |
1da177e4 LT |
839 | { |
840 | int i, num; | |
841 | int s_i, s_num; | |
51d7cccf | 842 | struct net *net = sock_net(skb->sk); |
4e852c02 | 843 | |
1da177e4 LT |
844 | s_i = cb->args[1]; |
845 | s_num = num = cb->args[2]; | |
4f5736c4 | 846 | |
1da177e4 | 847 | if (cb->args[0] == 0) { |
73c1f4a0 | 848 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 849 | goto skip_listen_ht; |
540722ff | 850 | |
0f7ff927 | 851 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 | 852 | struct sock *sk; |
c25eb3bf | 853 | struct hlist_nulls_node *node; |
5caea4ea | 854 | struct inet_listen_hashbucket *ilb; |
1da177e4 LT |
855 | |
856 | num = 0; | |
5caea4ea ED |
857 | ilb = &hashinfo->listening_hash[i]; |
858 | spin_lock_bh(&ilb->lock); | |
c25eb3bf | 859 | sk_nulls_for_each(sk, node, &ilb->head) { |
1da177e4 LT |
860 | struct inet_sock *inet = inet_sk(sk); |
861 | ||
51d7cccf AV |
862 | if (!net_eq(sock_net(sk), net)) |
863 | continue; | |
864 | ||
1da177e4 LT |
865 | if (num < s_num) { |
866 | num++; | |
867 | continue; | |
868 | } | |
869 | ||
d23deaa0 PE |
870 | if (r->sdiag_family != AF_UNSPEC && |
871 | sk->sk_family != r->sdiag_family) | |
872 | goto next_listen; | |
873 | ||
c720c7e8 | 874 | if (r->id.idiag_sport != inet->inet_sport && |
73c1f4a0 | 875 | r->id.idiag_sport) |
1da177e4 LT |
876 | goto next_listen; |
877 | ||
73c1f4a0 ACM |
878 | if (!(r->idiag_states & TCPF_LISTEN) || |
879 | r->id.idiag_dport || | |
1da177e4 LT |
880 | cb->args[3] > 0) |
881 | goto syn_recv; | |
882 | ||
25c4cd2b | 883 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
5caea4ea | 884 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
885 | goto done; |
886 | } | |
887 | ||
888 | syn_recv: | |
73c1f4a0 | 889 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
890 | goto next_listen; |
891 | ||
25c4cd2b | 892 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
5caea4ea | 893 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
894 | goto done; |
895 | } | |
896 | ||
897 | next_listen: | |
898 | cb->args[3] = 0; | |
899 | cb->args[4] = 0; | |
900 | ++num; | |
901 | } | |
5caea4ea | 902 | spin_unlock_bh(&ilb->lock); |
1da177e4 LT |
903 | |
904 | s_num = 0; | |
905 | cb->args[3] = 0; | |
906 | cb->args[4] = 0; | |
907 | } | |
1da177e4 LT |
908 | skip_listen_ht: |
909 | cb->args[0] = 1; | |
910 | s_i = num = s_num = 0; | |
911 | } | |
912 | ||
73c1f4a0 | 913 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
efb3cb42 | 914 | goto out; |
1da177e4 | 915 | |
f373b53b | 916 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
540722ff | 917 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
7e3aab4a | 918 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
1da177e4 | 919 | struct sock *sk; |
3ab5aee7 | 920 | struct hlist_nulls_node *node; |
1da177e4 | 921 | |
6be547a6 AK |
922 | num = 0; |
923 | ||
05dbc7b5 | 924 | if (hlist_nulls_empty(&head->chain)) |
6be547a6 AK |
925 | continue; |
926 | ||
1da177e4 LT |
927 | if (i > s_i) |
928 | s_num = 0; | |
929 | ||
7e3aab4a | 930 | spin_lock_bh(lock); |
3ab5aee7 | 931 | sk_nulls_for_each(sk, node, &head->chain) { |
05dbc7b5 | 932 | int res; |
70315d22 | 933 | int state; |
1da177e4 | 934 | |
51d7cccf AV |
935 | if (!net_eq(sock_net(sk), net)) |
936 | continue; | |
1da177e4 LT |
937 | if (num < s_num) |
938 | goto next_normal; | |
70315d22 NC |
939 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
940 | inet_twsk(sk)->tw_substate : sk->sk_state; | |
941 | if (!(r->idiag_states & (1 << state))) | |
1da177e4 | 942 | goto next_normal; |
d23deaa0 | 943 | if (r->sdiag_family != AF_UNSPEC && |
05dbc7b5 | 944 | sk->sk_family != r->sdiag_family) |
d23deaa0 | 945 | goto next_normal; |
05dbc7b5 | 946 | if (r->id.idiag_sport != htons(sk->sk_num) && |
73c1f4a0 | 947 | r->id.idiag_sport) |
1da177e4 | 948 | goto next_normal; |
05dbc7b5 | 949 | if (r->id.idiag_dport != sk->sk_dport && |
4e852c02 | 950 | r->id.idiag_dport) |
1da177e4 | 951 | goto next_normal; |
05dbc7b5 ED |
952 | if (sk->sk_state == TCP_TIME_WAIT) |
953 | res = inet_twsk_diag_dump(sk, skb, cb, r, bc); | |
954 | else | |
955 | res = inet_csk_diag_dump(sk, skb, cb, r, bc); | |
956 | if (res < 0) { | |
7e3aab4a | 957 | spin_unlock_bh(lock); |
1da177e4 LT |
958 | goto done; |
959 | } | |
960 | next_normal: | |
961 | ++num; | |
962 | } | |
963 | ||
7e3aab4a | 964 | spin_unlock_bh(lock); |
1da177e4 LT |
965 | } |
966 | ||
967 | done: | |
968 | cb->args[1] = i; | |
969 | cb->args[2] = num; | |
efb3cb42 PE |
970 | out: |
971 | ; | |
972 | } | |
1942c518 | 973 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
efb3cb42 PE |
974 | |
975 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, | |
c8991362 | 976 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
efb3cb42 PE |
977 | { |
978 | const struct inet_diag_handler *handler; | |
cacb6ba0 | 979 | int err = 0; |
efb3cb42 PE |
980 | |
981 | handler = inet_diag_lock_handler(r->sdiag_protocol); | |
982 | if (!IS_ERR(handler)) | |
1942c518 | 983 | handler->dump(skb, cb, r, bc); |
cacb6ba0 CG |
984 | else |
985 | err = PTR_ERR(handler); | |
d523a328 | 986 | inet_diag_unlock_handler(handler); |
efb3cb42 | 987 | |
cacb6ba0 | 988 | return err ? : skb->len; |
1da177e4 LT |
989 | } |
990 | ||
25c4cd2b PE |
991 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
992 | { | |
993 | struct nlattr *bc = NULL; | |
c8991362 | 994 | int hdrlen = sizeof(struct inet_diag_req_v2); |
25c4cd2b PE |
995 | |
996 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
997 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
998 | ||
d106352d | 999 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
25c4cd2b PE |
1000 | } |
1001 | ||
a029fe26 PE |
1002 | static inline int inet_diag_type2proto(int type) |
1003 | { | |
1004 | switch (type) { | |
1005 | case TCPDIAG_GETSOCK: | |
1006 | return IPPROTO_TCP; | |
1007 | case DCCPDIAG_GETSOCK: | |
1008 | return IPPROTO_DCCP; | |
1009 | default: | |
1010 | return 0; | |
1011 | } | |
1012 | } | |
1013 | ||
25c4cd2b PE |
1014 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
1015 | { | |
d106352d | 1016 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
c8991362 | 1017 | struct inet_diag_req_v2 req; |
25c4cd2b | 1018 | struct nlattr *bc = NULL; |
3b09c84c | 1019 | int hdrlen = sizeof(struct inet_diag_req); |
25c4cd2b | 1020 | |
d23deaa0 | 1021 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
25c4cd2b PE |
1022 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
1023 | req.idiag_ext = rc->idiag_ext; | |
1024 | req.idiag_states = rc->idiag_states; | |
1025 | req.id = rc->id; | |
1026 | ||
1027 | if (nlmsg_attrlen(cb->nlh, hdrlen)) | |
1028 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); | |
1029 | ||
1030 | return __inet_diag_dump(skb, cb, &req, bc); | |
1031 | } | |
1032 | ||
fe50ce28 PE |
1033 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
1034 | const struct nlmsghdr *nlh) | |
1035 | { | |
d106352d | 1036 | struct inet_diag_req *rc = nlmsg_data(nlh); |
c8991362 | 1037 | struct inet_diag_req_v2 req; |
fe50ce28 PE |
1038 | |
1039 | req.sdiag_family = rc->idiag_family; | |
1040 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); | |
1041 | req.idiag_ext = rc->idiag_ext; | |
1042 | req.idiag_states = rc->idiag_states; | |
1043 | req.id = rc->id; | |
1044 | ||
1045 | return inet_diag_get_exact(in_skb, nlh, &req); | |
1046 | } | |
1047 | ||
8d34172d | 1048 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1049 | { |
3b09c84c | 1050 | int hdrlen = sizeof(struct inet_diag_req); |
51d7cccf | 1051 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1052 | |
ead592ba TG |
1053 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
1054 | nlmsg_len(nlh) < hdrlen) | |
1055 | return -EINVAL; | |
1da177e4 | 1056 | |
b8f3ab42 | 1057 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
ead592ba TG |
1058 | if (nlmsg_attrlen(nlh, hdrlen)) { |
1059 | struct nlattr *attr; | |
1da177e4 | 1060 | |
ead592ba TG |
1061 | attr = nlmsg_find_attr(nlh, hdrlen, |
1062 | INET_DIAG_REQ_BYTECODE); | |
1063 | if (attr == NULL || | |
1064 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
1065 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1066 | return -EINVAL; | |
1067 | } | |
80d326fa PNA |
1068 | { |
1069 | struct netlink_dump_control c = { | |
1070 | .dump = inet_diag_dump_compat, | |
1071 | }; | |
51d7cccf | 1072 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
80d326fa | 1073 | } |
1da177e4 | 1074 | } |
ead592ba | 1075 | |
fe50ce28 | 1076 | return inet_diag_get_exact_compat(skb, nlh); |
1da177e4 LT |
1077 | } |
1078 | ||
d366477a PE |
1079 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
1080 | { | |
c8991362 | 1081 | int hdrlen = sizeof(struct inet_diag_req_v2); |
51d7cccf | 1082 | struct net *net = sock_net(skb->sk); |
d366477a PE |
1083 | |
1084 | if (nlmsg_len(h) < hdrlen) | |
1085 | return -EINVAL; | |
1086 | ||
1087 | if (h->nlmsg_flags & NLM_F_DUMP) { | |
25c4cd2b PE |
1088 | if (nlmsg_attrlen(h, hdrlen)) { |
1089 | struct nlattr *attr; | |
1090 | attr = nlmsg_find_attr(h, hdrlen, | |
1091 | INET_DIAG_REQ_BYTECODE); | |
1092 | if (attr == NULL || | |
1093 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || | |
1094 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) | |
1095 | return -EINVAL; | |
1096 | } | |
80d326fa PNA |
1097 | { |
1098 | struct netlink_dump_control c = { | |
1099 | .dump = inet_diag_dump, | |
1100 | }; | |
51d7cccf | 1101 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
80d326fa | 1102 | } |
d366477a PE |
1103 | } |
1104 | ||
d106352d | 1105 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
d366477a PE |
1106 | } |
1107 | ||
8dcf01fc | 1108 | static const struct sock_diag_handler inet_diag_handler = { |
d366477a PE |
1109 | .family = AF_INET, |
1110 | .dump = inet_diag_handler_dump, | |
1111 | }; | |
1112 | ||
8dcf01fc | 1113 | static const struct sock_diag_handler inet6_diag_handler = { |
d366477a PE |
1114 | .family = AF_INET6, |
1115 | .dump = inet_diag_handler_dump, | |
1116 | }; | |
1117 | ||
4f5736c4 ACM |
1118 | int inet_diag_register(const struct inet_diag_handler *h) |
1119 | { | |
1120 | const __u16 type = h->idiag_type; | |
1121 | int err = -EINVAL; | |
1122 | ||
f13c95f0 | 1123 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1124 | goto out; |
1125 | ||
d523a328 | 1126 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1127 | err = -EEXIST; |
1128 | if (inet_diag_table[type] == NULL) { | |
1129 | inet_diag_table[type] = h; | |
1130 | err = 0; | |
1131 | } | |
d523a328 | 1132 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1133 | out: |
1134 | return err; | |
1135 | } | |
1136 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
1137 | ||
1138 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
1139 | { | |
1140 | const __u16 type = h->idiag_type; | |
1141 | ||
f13c95f0 | 1142 | if (type >= IPPROTO_MAX) |
4f5736c4 ACM |
1143 | return; |
1144 | ||
d523a328 | 1145 | mutex_lock(&inet_diag_table_mutex); |
4f5736c4 | 1146 | inet_diag_table[type] = NULL; |
d523a328 | 1147 | mutex_unlock(&inet_diag_table_mutex); |
4f5736c4 ACM |
1148 | } |
1149 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
1150 | ||
73c1f4a0 | 1151 | static int __init inet_diag_init(void) |
1da177e4 | 1152 | { |
f13c95f0 | 1153 | const int inet_diag_table_size = (IPPROTO_MAX * |
4f5736c4 ACM |
1154 | sizeof(struct inet_diag_handler *)); |
1155 | int err = -ENOMEM; | |
1156 | ||
0da974f4 | 1157 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
1158 | if (!inet_diag_table) |
1159 | goto out; | |
1160 | ||
d366477a PE |
1161 | err = sock_diag_register(&inet_diag_handler); |
1162 | if (err) | |
1163 | goto out_free_nl; | |
1164 | ||
1165 | err = sock_diag_register(&inet6_diag_handler); | |
1166 | if (err) | |
1167 | goto out_free_inet; | |
1168 | ||
8ef874bf | 1169 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 ACM |
1170 | out: |
1171 | return err; | |
d366477a PE |
1172 | |
1173 | out_free_inet: | |
1174 | sock_diag_unregister(&inet_diag_handler); | |
1175 | out_free_nl: | |
4f5736c4 ACM |
1176 | kfree(inet_diag_table); |
1177 | goto out; | |
1da177e4 LT |
1178 | } |
1179 | ||
73c1f4a0 | 1180 | static void __exit inet_diag_exit(void) |
1da177e4 | 1181 | { |
d366477a PE |
1182 | sock_diag_unregister(&inet6_diag_handler); |
1183 | sock_diag_unregister(&inet_diag_handler); | |
8ef874bf | 1184 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
4f5736c4 | 1185 | kfree(inet_diag_table); |
1da177e4 LT |
1186 | } |
1187 | ||
73c1f4a0 ACM |
1188 | module_init(inet_diag_init); |
1189 | module_exit(inet_diag_exit); | |
1da177e4 | 1190 | MODULE_LICENSE("GPL"); |
aec8dc62 PE |
1191 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
1192 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |