Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
73c1f4a0 | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 3 | * |
73c1f4a0 | 4 | * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $ |
1da177e4 LT |
5 | * |
6 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/fcntl.h> | |
18 | #include <linux/random.h> | |
19 | #include <linux/cache.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/time.h> | |
22 | ||
23 | #include <net/icmp.h> | |
24 | #include <net/tcp.h> | |
25 | #include <net/ipv6.h> | |
26 | #include <net/inet_common.h> | |
505cbfc5 ACM |
27 | #include <net/inet_connection_sock.h> |
28 | #include <net/inet_hashtables.h> | |
29 | #include <net/inet_timewait_sock.h> | |
30 | #include <net/inet6_hashtables.h> | |
1da177e4 LT |
31 | |
32 | #include <linux/inet.h> | |
33 | #include <linux/stddef.h> | |
34 | ||
a8c2190e | 35 | #include <linux/inet_diag.h> |
1da177e4 | 36 | |
4f5736c4 ACM |
37 | static const struct inet_diag_handler **inet_diag_table; |
38 | ||
73c1f4a0 | 39 | struct inet_diag_entry { |
1da177e4 LT |
40 | u32 *saddr; |
41 | u32 *daddr; | |
42 | u16 sport; | |
43 | u16 dport; | |
44 | u16 family; | |
45 | u16 userlocks; | |
46 | }; | |
47 | ||
73c1f4a0 | 48 | static struct sock *idiagnl; |
1da177e4 | 49 | |
73c1f4a0 | 50 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
7c99c909 | 51 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
1da177e4 | 52 | |
dff2c035 ACM |
53 | static int inet_csk_diag_fill(struct sock *sk, |
54 | struct sk_buff *skb, | |
55 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
56 | const struct nlmsghdr *unlh) | |
1da177e4 | 57 | { |
463c84b9 | 58 | const struct inet_sock *inet = inet_sk(sk); |
463c84b9 | 59 | const struct inet_connection_sock *icsk = inet_csk(sk); |
73c1f4a0 | 60 | struct inet_diag_msg *r; |
1da177e4 | 61 | struct nlmsghdr *nlh; |
4f5736c4 | 62 | void *info = NULL; |
73c1f4a0 | 63 | struct inet_diag_meminfo *minfo = NULL; |
1da177e4 | 64 | unsigned char *b = skb->tail; |
4f5736c4 ACM |
65 | const struct inet_diag_handler *handler; |
66 | ||
67 | handler = inet_diag_table[unlh->nlmsg_type]; | |
68 | BUG_ON(handler == NULL); | |
1da177e4 | 69 | |
540722ff | 70 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 | 71 | nlh->nlmsg_flags = nlmsg_flags; |
4f5736c4 | 72 | |
1da177e4 | 73 | r = NLMSG_DATA(nlh); |
c7d58aab ACM |
74 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
75 | ||
76 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) | |
77 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo)); | |
78 | ||
79 | if (ext & (1 << (INET_DIAG_INFO - 1))) | |
80 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, | |
81 | handler->idiag_info_size); | |
82 | ||
83 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { | |
84 | const size_t len = strlen(icsk->icsk_ca_ops->name); | |
85 | ||
86 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), | |
87 | icsk->icsk_ca_ops->name); | |
1da177e4 | 88 | } |
c7d58aab | 89 | |
73c1f4a0 ACM |
90 | r->idiag_family = sk->sk_family; |
91 | r->idiag_state = sk->sk_state; | |
92 | r->idiag_timer = 0; | |
93 | r->idiag_retrans = 0; | |
1da177e4 | 94 | |
73c1f4a0 ACM |
95 | r->id.idiag_if = sk->sk_bound_dev_if; |
96 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; | |
97 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); | |
1da177e4 | 98 | |
73c1f4a0 ACM |
99 | r->id.idiag_sport = inet->sport; |
100 | r->id.idiag_dport = inet->dport; | |
101 | r->id.idiag_src[0] = inet->rcv_saddr; | |
102 | r->id.idiag_dst[0] = inet->daddr; | |
1da177e4 | 103 | |
505cbfc5 | 104 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 105 | if (r->idiag_family == AF_INET6) { |
1da177e4 LT |
106 | struct ipv6_pinfo *np = inet6_sk(sk); |
107 | ||
73c1f4a0 | 108 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
1da177e4 | 109 | &np->rcv_saddr); |
73c1f4a0 | 110 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
1da177e4 LT |
111 | &np->daddr); |
112 | } | |
113 | #endif | |
114 | ||
a8c2190e | 115 | #define EXPIRES_IN_MS(tmo) ((tmo - jiffies) * 1000 + HZ - 1) / HZ |
1da177e4 | 116 | |
463c84b9 | 117 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
118 | r->idiag_timer = 1; |
119 | r->idiag_retrans = icsk->icsk_retransmits; | |
120 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 121 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
122 | r->idiag_timer = 4; |
123 | r->idiag_retrans = icsk->icsk_probes_out; | |
124 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 125 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
126 | r->idiag_timer = 2; |
127 | r->idiag_retrans = icsk->icsk_probes_out; | |
128 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 129 | } else { |
73c1f4a0 ACM |
130 | r->idiag_timer = 0; |
131 | r->idiag_expires = 0; | |
1da177e4 LT |
132 | } |
133 | #undef EXPIRES_IN_MS | |
540722ff | 134 | |
73c1f4a0 ACM |
135 | r->idiag_uid = sock_i_uid(sk); |
136 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
137 | |
138 | if (minfo) { | |
73c1f4a0 ACM |
139 | minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc); |
140 | minfo->idiag_wmem = sk->sk_wmem_queued; | |
141 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
142 | minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc); | |
1da177e4 LT |
143 | } |
144 | ||
4f5736c4 | 145 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 146 | |
6687e988 ACM |
147 | if (sk->sk_state < TCP_TIME_WAIT && |
148 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
149 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 LT |
150 | |
151 | nlh->nlmsg_len = skb->tail - b; | |
152 | return skb->len; | |
153 | ||
7c99c909 | 154 | rtattr_failure: |
1da177e4 LT |
155 | nlmsg_failure: |
156 | skb_trim(skb, b - skb->data); | |
157 | return -1; | |
158 | } | |
159 | ||
c7d58aab ACM |
160 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
161 | struct sk_buff *skb, int ext, u32 pid, | |
162 | u32 seq, u16 nlmsg_flags, | |
163 | const struct nlmsghdr *unlh) | |
164 | { | |
165 | long tmo; | |
166 | struct inet_diag_msg *r; | |
167 | const unsigned char *previous_tail = skb->tail; | |
168 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, | |
169 | unlh->nlmsg_type, sizeof(*r)); | |
170 | ||
171 | r = NLMSG_DATA(nlh); | |
172 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
173 | ||
174 | nlh->nlmsg_flags = nlmsg_flags; | |
175 | ||
176 | tmo = tw->tw_ttd - jiffies; | |
177 | if (tmo < 0) | |
178 | tmo = 0; | |
179 | ||
180 | r->idiag_family = tw->tw_family; | |
181 | r->idiag_state = tw->tw_state; | |
182 | r->idiag_timer = 0; | |
183 | r->idiag_retrans = 0; | |
184 | r->id.idiag_if = tw->tw_bound_dev_if; | |
185 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
186 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
187 | r->id.idiag_sport = tw->tw_sport; | |
188 | r->id.idiag_dport = tw->tw_dport; | |
189 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
190 | r->id.idiag_dst[0] = tw->tw_daddr; | |
191 | r->idiag_state = tw->tw_substate; | |
192 | r->idiag_timer = 3; | |
193 | r->idiag_expires = (tmo * 1000 + HZ - 1) / HZ; | |
194 | r->idiag_rqueue = 0; | |
195 | r->idiag_wqueue = 0; | |
196 | r->idiag_uid = 0; | |
197 | r->idiag_inode = 0; | |
198 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
199 | if (tw->tw_family == AF_INET6) { | |
200 | const struct inet6_timewait_sock *tw6 = | |
201 | inet6_twsk((struct sock *)tw); | |
202 | ||
203 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
204 | &tw6->tw_v6_rcv_saddr); | |
205 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, | |
206 | &tw6->tw_v6_daddr); | |
207 | } | |
208 | #endif | |
209 | nlh->nlmsg_len = skb->tail - previous_tail; | |
210 | return skb->len; | |
211 | nlmsg_failure: | |
212 | skb_trim(skb, previous_tail - skb->data); | |
213 | return -1; | |
214 | } | |
215 | ||
dff2c035 ACM |
216 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
217 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
218 | const struct nlmsghdr *unlh) | |
219 | { | |
220 | if (sk->sk_state == TCP_TIME_WAIT) | |
221 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
222 | skb, ext, pid, seq, nlmsg_flags, | |
223 | unlh); | |
224 | return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh); | |
225 | } | |
226 | ||
4e852c02 ACM |
227 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
228 | const struct nlmsghdr *nlh) | |
1da177e4 LT |
229 | { |
230 | int err; | |
231 | struct sock *sk; | |
73c1f4a0 | 232 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 233 | struct sk_buff *rep; |
4f5736c4 ACM |
234 | struct inet_hashinfo *hashinfo; |
235 | const struct inet_diag_handler *handler; | |
236 | ||
237 | handler = inet_diag_table[nlh->nlmsg_type]; | |
238 | BUG_ON(handler == NULL); | |
239 | hashinfo = handler->idiag_hashinfo; | |
240 | ||
73c1f4a0 ACM |
241 | if (req->idiag_family == AF_INET) { |
242 | sk = inet_lookup(hashinfo, req->id.idiag_dst[0], | |
243 | req->id.idiag_dport, req->id.idiag_src[0], | |
244 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 245 | } |
505cbfc5 | 246 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 247 | else if (req->idiag_family == AF_INET6) { |
505cbfc5 | 248 | sk = inet6_lookup(hashinfo, |
73c1f4a0 ACM |
249 | (struct in6_addr *)req->id.idiag_dst, |
250 | req->id.idiag_dport, | |
251 | (struct in6_addr *)req->id.idiag_src, | |
252 | req->id.idiag_sport, | |
253 | req->id.idiag_if); | |
1da177e4 LT |
254 | } |
255 | #endif | |
256 | else { | |
257 | return -EINVAL; | |
258 | } | |
259 | ||
260 | if (sk == NULL) | |
261 | return -ENOENT; | |
262 | ||
263 | err = -ESTALE; | |
73c1f4a0 ACM |
264 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
265 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
266 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
267 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
268 | goto out; |
269 | ||
270 | err = -ENOMEM; | |
73c1f4a0 ACM |
271 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
272 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
273 | handler->idiag_info_size + 64)), |
274 | GFP_KERNEL); | |
1da177e4 LT |
275 | if (!rep) |
276 | goto out; | |
277 | ||
dff2c035 | 278 | if (sk_diag_fill(sk, rep, req->idiag_ext, |
1da177e4 | 279 | NETLINK_CB(in_skb).pid, |
540722ff | 280 | nlh->nlmsg_seq, 0, nlh) <= 0) |
1da177e4 LT |
281 | BUG(); |
282 | ||
73c1f4a0 ACM |
283 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
284 | MSG_DONTWAIT); | |
1da177e4 LT |
285 | if (err > 0) |
286 | err = 0; | |
287 | ||
288 | out: | |
289 | if (sk) { | |
290 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 291 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
292 | else |
293 | sock_put(sk); | |
294 | } | |
295 | return err; | |
296 | } | |
297 | ||
298 | static int bitstring_match(const u32 *a1, const u32 *a2, int bits) | |
299 | { | |
300 | int words = bits >> 5; | |
301 | ||
302 | bits &= 0x1f; | |
303 | ||
304 | if (words) { | |
305 | if (memcmp(a1, a2, words << 2)) | |
306 | return 0; | |
307 | } | |
308 | if (bits) { | |
309 | __u32 w1, w2; | |
310 | __u32 mask; | |
311 | ||
312 | w1 = a1[words]; | |
313 | w2 = a2[words]; | |
314 | ||
315 | mask = htonl((0xffffffff) << (32 - bits)); | |
316 | ||
317 | if ((w1 ^ w2) & mask) | |
318 | return 0; | |
319 | } | |
320 | ||
321 | return 1; | |
322 | } | |
323 | ||
324 | ||
73c1f4a0 | 325 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 326 | const struct inet_diag_entry *entry) |
1da177e4 LT |
327 | { |
328 | while (len > 0) { | |
329 | int yes = 1; | |
73c1f4a0 | 330 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
331 | |
332 | switch (op->code) { | |
73c1f4a0 | 333 | case INET_DIAG_BC_NOP: |
1da177e4 | 334 | break; |
73c1f4a0 | 335 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
336 | yes = 0; |
337 | break; | |
73c1f4a0 | 338 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
339 | yes = entry->sport >= op[1].no; |
340 | break; | |
73c1f4a0 | 341 | case INET_DIAG_BC_S_LE: |
1da177e4 LT |
342 | yes = entry->dport <= op[1].no; |
343 | break; | |
73c1f4a0 | 344 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
345 | yes = entry->dport >= op[1].no; |
346 | break; | |
73c1f4a0 | 347 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
348 | yes = entry->dport <= op[1].no; |
349 | break; | |
73c1f4a0 | 350 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
351 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
352 | break; | |
73c1f4a0 | 353 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
354 | case INET_DIAG_BC_D_COND: { |
355 | struct inet_diag_hostcond *cond; | |
1da177e4 LT |
356 | u32 *addr; |
357 | ||
a8c2190e | 358 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 359 | if (cond->port != -1 && |
73c1f4a0 | 360 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
361 | entry->sport : entry->dport)) { |
362 | yes = 0; | |
363 | break; | |
364 | } | |
4e852c02 | 365 | |
1da177e4 LT |
366 | if (cond->prefix_len == 0) |
367 | break; | |
368 | ||
73c1f4a0 | 369 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
370 | addr = entry->saddr; |
371 | else | |
372 | addr = entry->daddr; | |
373 | ||
4e852c02 ACM |
374 | if (bitstring_match(addr, cond->addr, |
375 | cond->prefix_len)) | |
1da177e4 LT |
376 | break; |
377 | if (entry->family == AF_INET6 && | |
378 | cond->family == AF_INET) { | |
379 | if (addr[0] == 0 && addr[1] == 0 && | |
380 | addr[2] == htonl(0xffff) && | |
a8c2190e ACM |
381 | bitstring_match(addr + 3, cond->addr, |
382 | cond->prefix_len)) | |
1da177e4 LT |
383 | break; |
384 | } | |
385 | yes = 0; | |
386 | break; | |
387 | } | |
388 | } | |
389 | ||
4e852c02 | 390 | if (yes) { |
1da177e4 LT |
391 | len -= op->yes; |
392 | bc += op->yes; | |
393 | } else { | |
394 | len -= op->no; | |
395 | bc += op->no; | |
396 | } | |
397 | } | |
398 | return (len == 0); | |
399 | } | |
400 | ||
401 | static int valid_cc(const void *bc, int len, int cc) | |
402 | { | |
403 | while (len >= 0) { | |
73c1f4a0 | 404 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
405 | |
406 | if (cc > len) | |
407 | return 0; | |
408 | if (cc == len) | |
409 | return 1; | |
410 | if (op->yes < 4) | |
411 | return 0; | |
412 | len -= op->yes; | |
413 | bc += op->yes; | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
73c1f4a0 | 418 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 LT |
419 | { |
420 | const unsigned char *bc = bytecode; | |
421 | int len = bytecode_len; | |
422 | ||
423 | while (len > 0) { | |
a8c2190e | 424 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc; |
1da177e4 LT |
425 | |
426 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
427 | switch (op->code) { | |
73c1f4a0 ACM |
428 | case INET_DIAG_BC_AUTO: |
429 | case INET_DIAG_BC_S_COND: | |
430 | case INET_DIAG_BC_D_COND: | |
431 | case INET_DIAG_BC_S_GE: | |
432 | case INET_DIAG_BC_S_LE: | |
433 | case INET_DIAG_BC_D_GE: | |
434 | case INET_DIAG_BC_D_LE: | |
a8c2190e | 435 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 | 436 | return -EINVAL; |
73c1f4a0 | 437 | case INET_DIAG_BC_JMP: |
a8c2190e | 438 | if (op->no < 4 || op->no > len + 4) |
1da177e4 LT |
439 | return -EINVAL; |
440 | if (op->no < len && | |
a8c2190e | 441 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
442 | return -EINVAL; |
443 | break; | |
73c1f4a0 | 444 | case INET_DIAG_BC_NOP: |
a8c2190e | 445 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 LT |
446 | return -EINVAL; |
447 | break; | |
448 | default: | |
449 | return -EINVAL; | |
450 | } | |
4e852c02 | 451 | bc += op->yes; |
1da177e4 LT |
452 | len -= op->yes; |
453 | } | |
454 | return len == 0 ? 0 : -EINVAL; | |
455 | } | |
456 | ||
dff2c035 ACM |
457 | static int inet_csk_diag_dump(struct sock *sk, |
458 | struct sk_buff *skb, | |
459 | struct netlink_callback *cb) | |
1da177e4 | 460 | { |
73c1f4a0 | 461 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 LT |
462 | |
463 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
73c1f4a0 | 464 | struct inet_diag_entry entry; |
1da177e4 LT |
465 | struct rtattr *bc = (struct rtattr *)(r + 1); |
466 | struct inet_sock *inet = inet_sk(sk); | |
467 | ||
468 | entry.family = sk->sk_family; | |
505cbfc5 | 469 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
470 | if (entry.family == AF_INET6) { |
471 | struct ipv6_pinfo *np = inet6_sk(sk); | |
472 | ||
473 | entry.saddr = np->rcv_saddr.s6_addr32; | |
474 | entry.daddr = np->daddr.s6_addr32; | |
475 | } else | |
476 | #endif | |
477 | { | |
478 | entry.saddr = &inet->rcv_saddr; | |
479 | entry.daddr = &inet->daddr; | |
480 | } | |
481 | entry.sport = inet->num; | |
482 | entry.dport = ntohs(inet->dport); | |
483 | entry.userlocks = sk->sk_userlocks; | |
484 | ||
73c1f4a0 | 485 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
1da177e4 LT |
486 | return 0; |
487 | } | |
488 | ||
dff2c035 ACM |
489 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
490 | NETLINK_CB(cb->skb).pid, | |
491 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
492 | } |
493 | ||
c7d58aab ACM |
494 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
495 | struct sk_buff *skb, | |
496 | struct netlink_callback *cb) | |
497 | { | |
498 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
499 | ||
500 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
501 | struct inet_diag_entry entry; | |
502 | struct rtattr *bc = (struct rtattr *)(r + 1); | |
503 | ||
504 | entry.family = tw->tw_family; | |
505 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
506 | if (tw->tw_family == AF_INET6) { | |
507 | struct inet6_timewait_sock *tw6 = | |
508 | inet6_twsk((struct sock *)tw); | |
509 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
510 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
511 | } else | |
512 | #endif | |
513 | { | |
514 | entry.saddr = &tw->tw_rcv_saddr; | |
515 | entry.daddr = &tw->tw_daddr; | |
516 | } | |
517 | entry.sport = tw->tw_num; | |
518 | entry.dport = ntohs(tw->tw_dport); | |
519 | entry.userlocks = 0; | |
520 | ||
521 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) | |
522 | return 0; | |
523 | } | |
524 | ||
525 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
526 | NETLINK_CB(cb->skb).pid, | |
527 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
528 | } | |
529 | ||
73c1f4a0 | 530 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
531 | struct request_sock *req, u32 pid, u32 seq, |
532 | const struct nlmsghdr *unlh) | |
1da177e4 | 533 | { |
2e6599cb | 534 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 LT |
535 | struct inet_sock *inet = inet_sk(sk); |
536 | unsigned char *b = skb->tail; | |
73c1f4a0 | 537 | struct inet_diag_msg *r; |
1da177e4 LT |
538 | struct nlmsghdr *nlh; |
539 | long tmo; | |
540 | ||
540722ff | 541 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
542 | nlh->nlmsg_flags = NLM_F_MULTI; |
543 | r = NLMSG_DATA(nlh); | |
544 | ||
73c1f4a0 ACM |
545 | r->idiag_family = sk->sk_family; |
546 | r->idiag_state = TCP_SYN_RECV; | |
547 | r->idiag_timer = 1; | |
548 | r->idiag_retrans = req->retrans; | |
1da177e4 | 549 | |
73c1f4a0 ACM |
550 | r->id.idiag_if = sk->sk_bound_dev_if; |
551 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
552 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
553 | |
554 | tmo = req->expires - jiffies; | |
555 | if (tmo < 0) | |
556 | tmo = 0; | |
557 | ||
73c1f4a0 ACM |
558 | r->id.idiag_sport = inet->sport; |
559 | r->id.idiag_dport = ireq->rmt_port; | |
560 | r->id.idiag_src[0] = ireq->loc_addr; | |
561 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
562 | r->idiag_expires = jiffies_to_msecs(tmo); | |
563 | r->idiag_rqueue = 0; | |
564 | r->idiag_wqueue = 0; | |
565 | r->idiag_uid = sock_i_uid(sk); | |
566 | r->idiag_inode = 0; | |
505cbfc5 | 567 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
568 | if (r->idiag_family == AF_INET6) { |
569 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
ca304b61 | 570 | &inet6_rsk(req)->loc_addr); |
73c1f4a0 | 571 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
ca304b61 | 572 | &inet6_rsk(req)->rmt_addr); |
1da177e4 LT |
573 | } |
574 | #endif | |
575 | nlh->nlmsg_len = skb->tail - b; | |
576 | ||
577 | return skb->len; | |
578 | ||
579 | nlmsg_failure: | |
580 | skb_trim(skb, b - skb->data); | |
581 | return -1; | |
582 | } | |
583 | ||
73c1f4a0 | 584 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 585 | struct netlink_callback *cb) |
1da177e4 | 586 | { |
73c1f4a0 ACM |
587 | struct inet_diag_entry entry; |
588 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 589 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 590 | struct listen_sock *lopt; |
1da177e4 LT |
591 | struct rtattr *bc = NULL; |
592 | struct inet_sock *inet = inet_sk(sk); | |
593 | int j, s_j; | |
594 | int reqnum, s_reqnum; | |
595 | int err = 0; | |
596 | ||
597 | s_j = cb->args[3]; | |
598 | s_reqnum = cb->args[4]; | |
599 | ||
600 | if (s_j > 0) | |
601 | s_j--; | |
602 | ||
603 | entry.family = sk->sk_family; | |
604 | ||
463c84b9 | 605 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 606 | |
463c84b9 | 607 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
608 | if (!lopt || !lopt->qlen) |
609 | goto out; | |
610 | ||
611 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
612 | bc = (struct rtattr *)(r + 1); | |
613 | entry.sport = inet->num; | |
614 | entry.userlocks = sk->sk_userlocks; | |
615 | } | |
616 | ||
540722ff | 617 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 618 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
619 | |
620 | reqnum = 0; | |
621 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
622 | struct inet_request_sock *ireq = inet_rsk(req); |
623 | ||
1da177e4 LT |
624 | if (reqnum < s_reqnum) |
625 | continue; | |
73c1f4a0 ACM |
626 | if (r->id.idiag_dport != ireq->rmt_port && |
627 | r->id.idiag_dport) | |
1da177e4 LT |
628 | continue; |
629 | ||
630 | if (bc) { | |
631 | entry.saddr = | |
505cbfc5 | 632 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 633 | (entry.family == AF_INET6) ? |
ca304b61 | 634 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 635 | #endif |
2e6599cb | 636 | &ireq->loc_addr; |
4e852c02 | 637 | entry.daddr = |
505cbfc5 | 638 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 639 | (entry.family == AF_INET6) ? |
ca304b61 | 640 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 641 | #endif |
2e6599cb ACM |
642 | &ireq->rmt_addr; |
643 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 644 | |
73c1f4a0 | 645 | if (!inet_diag_bc_run(RTA_DATA(bc), |
1da177e4 LT |
646 | RTA_PAYLOAD(bc), &entry)) |
647 | continue; | |
648 | } | |
649 | ||
73c1f4a0 | 650 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 651 | NETLINK_CB(cb->skb).pid, |
540722ff | 652 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
653 | if (err < 0) { |
654 | cb->args[3] = j + 1; | |
655 | cb->args[4] = reqnum; | |
656 | goto out; | |
657 | } | |
658 | } | |
659 | ||
660 | s_reqnum = 0; | |
661 | } | |
662 | ||
663 | out: | |
463c84b9 | 664 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
665 | |
666 | return err; | |
667 | } | |
668 | ||
73c1f4a0 | 669 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
670 | { |
671 | int i, num; | |
672 | int s_i, s_num; | |
73c1f4a0 | 673 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 674 | const struct inet_diag_handler *handler; |
540722ff | 675 | struct inet_hashinfo *hashinfo; |
1da177e4 | 676 | |
4f5736c4 ACM |
677 | handler = inet_diag_table[cb->nlh->nlmsg_type]; |
678 | BUG_ON(handler == NULL); | |
679 | hashinfo = handler->idiag_hashinfo; | |
4e852c02 | 680 | |
1da177e4 LT |
681 | s_i = cb->args[1]; |
682 | s_num = num = cb->args[2]; | |
4f5736c4 | 683 | |
1da177e4 | 684 | if (cb->args[0] == 0) { |
73c1f4a0 | 685 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 686 | goto skip_listen_ht; |
540722ff ACM |
687 | |
688 | inet_listen_lock(hashinfo); | |
0f7ff927 | 689 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 LT |
690 | struct sock *sk; |
691 | struct hlist_node *node; | |
692 | ||
693 | num = 0; | |
540722ff | 694 | sk_for_each(sk, node, &hashinfo->listening_hash[i]) { |
1da177e4 LT |
695 | struct inet_sock *inet = inet_sk(sk); |
696 | ||
697 | if (num < s_num) { | |
698 | num++; | |
699 | continue; | |
700 | } | |
701 | ||
73c1f4a0 ACM |
702 | if (r->id.idiag_sport != inet->sport && |
703 | r->id.idiag_sport) | |
1da177e4 LT |
704 | goto next_listen; |
705 | ||
73c1f4a0 ACM |
706 | if (!(r->idiag_states & TCPF_LISTEN) || |
707 | r->id.idiag_dport || | |
1da177e4 LT |
708 | cb->args[3] > 0) |
709 | goto syn_recv; | |
710 | ||
dff2c035 | 711 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
540722ff | 712 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
713 | goto done; |
714 | } | |
715 | ||
716 | syn_recv: | |
73c1f4a0 | 717 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
718 | goto next_listen; |
719 | ||
73c1f4a0 | 720 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
540722ff | 721 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
722 | goto done; |
723 | } | |
724 | ||
725 | next_listen: | |
726 | cb->args[3] = 0; | |
727 | cb->args[4] = 0; | |
728 | ++num; | |
729 | } | |
730 | ||
731 | s_num = 0; | |
732 | cb->args[3] = 0; | |
733 | cb->args[4] = 0; | |
734 | } | |
540722ff | 735 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
736 | skip_listen_ht: |
737 | cb->args[0] = 1; | |
738 | s_i = num = s_num = 0; | |
739 | } | |
740 | ||
73c1f4a0 | 741 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 LT |
742 | return skb->len; |
743 | ||
540722ff ACM |
744 | for (i = s_i; i < hashinfo->ehash_size; i++) { |
745 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; | |
1da177e4 LT |
746 | struct sock *sk; |
747 | struct hlist_node *node; | |
748 | ||
749 | if (i > s_i) | |
750 | s_num = 0; | |
751 | ||
752 | read_lock_bh(&head->lock); | |
1da177e4 LT |
753 | num = 0; |
754 | sk_for_each(sk, node, &head->chain) { | |
755 | struct inet_sock *inet = inet_sk(sk); | |
756 | ||
757 | if (num < s_num) | |
758 | goto next_normal; | |
73c1f4a0 | 759 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 760 | goto next_normal; |
73c1f4a0 ACM |
761 | if (r->id.idiag_sport != inet->sport && |
762 | r->id.idiag_sport) | |
1da177e4 | 763 | goto next_normal; |
4e852c02 ACM |
764 | if (r->id.idiag_dport != inet->dport && |
765 | r->id.idiag_dport) | |
1da177e4 | 766 | goto next_normal; |
dff2c035 | 767 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
1da177e4 LT |
768 | read_unlock_bh(&head->lock); |
769 | goto done; | |
770 | } | |
771 | next_normal: | |
772 | ++num; | |
773 | } | |
774 | ||
73c1f4a0 | 775 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
776 | struct inet_timewait_sock *tw; |
777 | ||
778 | inet_twsk_for_each(tw, node, | |
540722ff | 779 | &hashinfo->ehash[i + hashinfo->ehash_size].chain) { |
1da177e4 LT |
780 | |
781 | if (num < s_num) | |
782 | goto next_dying; | |
7dbf0755 | 783 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 784 | r->id.idiag_sport) |
1da177e4 | 785 | goto next_dying; |
7dbf0755 | 786 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 787 | r->id.idiag_dport) |
1da177e4 | 788 | goto next_dying; |
c7d58aab | 789 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
1da177e4 LT |
790 | read_unlock_bh(&head->lock); |
791 | goto done; | |
792 | } | |
793 | next_dying: | |
794 | ++num; | |
795 | } | |
796 | } | |
797 | read_unlock_bh(&head->lock); | |
798 | } | |
799 | ||
800 | done: | |
801 | cb->args[1] = i; | |
802 | cb->args[2] = num; | |
803 | return skb->len; | |
804 | } | |
805 | ||
4e852c02 | 806 | static inline int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
807 | { |
808 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
809 | return 0; | |
810 | ||
4f5736c4 | 811 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX) |
1da177e4 LT |
812 | goto err_inval; |
813 | ||
4f5736c4 ACM |
814 | if (inet_diag_table[nlh->nlmsg_type] == NULL) |
815 | return -ENOENT; | |
816 | ||
73c1f4a0 | 817 | if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len) |
1da177e4 LT |
818 | goto err_inval; |
819 | ||
820 | if (nlh->nlmsg_flags&NLM_F_DUMP) { | |
73c1f4a0 ACM |
821 | if (nlh->nlmsg_len > |
822 | (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) { | |
823 | struct rtattr *rta = (void *)(NLMSG_DATA(nlh) + | |
824 | sizeof(struct inet_diag_req)); | |
825 | if (rta->rta_type != INET_DIAG_REQ_BYTECODE || | |
1da177e4 | 826 | rta->rta_len < 8 || |
73c1f4a0 ACM |
827 | rta->rta_len > |
828 | (nlh->nlmsg_len - | |
829 | NLMSG_SPACE(sizeof(struct inet_diag_req)))) | |
1da177e4 | 830 | goto err_inval; |
73c1f4a0 | 831 | if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta))) |
1da177e4 LT |
832 | goto err_inval; |
833 | } | |
73c1f4a0 | 834 | return netlink_dump_start(idiagnl, skb, nlh, |
a8f74b22 | 835 | inet_diag_dump, NULL); |
4e852c02 | 836 | } else |
73c1f4a0 | 837 | return inet_diag_get_exact(skb, nlh); |
1da177e4 LT |
838 | |
839 | err_inval: | |
840 | return -EINVAL; | |
841 | } | |
842 | ||
843 | ||
73c1f4a0 | 844 | static inline void inet_diag_rcv_skb(struct sk_buff *skb) |
1da177e4 | 845 | { |
1da177e4 | 846 | if (skb->len >= NLMSG_SPACE(0)) { |
4e852c02 ACM |
847 | int err; |
848 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data; | |
849 | ||
850 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
851 | skb->len < nlh->nlmsg_len) | |
1da177e4 | 852 | return; |
73c1f4a0 | 853 | err = inet_diag_rcv_msg(skb, nlh); |
4e852c02 | 854 | if (err || nlh->nlmsg_flags & NLM_F_ACK) |
1da177e4 LT |
855 | netlink_ack(skb, nlh, err); |
856 | } | |
857 | } | |
858 | ||
73c1f4a0 | 859 | static void inet_diag_rcv(struct sock *sk, int len) |
1da177e4 LT |
860 | { |
861 | struct sk_buff *skb; | |
2a0a6ebe | 862 | unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); |
1da177e4 | 863 | |
2a0a6ebe | 864 | while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) { |
73c1f4a0 | 865 | inet_diag_rcv_skb(skb); |
1da177e4 LT |
866 | kfree_skb(skb); |
867 | } | |
868 | } | |
869 | ||
4f5736c4 ACM |
870 | static DEFINE_SPINLOCK(inet_diag_register_lock); |
871 | ||
872 | int inet_diag_register(const struct inet_diag_handler *h) | |
873 | { | |
874 | const __u16 type = h->idiag_type; | |
875 | int err = -EINVAL; | |
876 | ||
877 | if (type >= INET_DIAG_GETSOCK_MAX) | |
878 | goto out; | |
879 | ||
880 | spin_lock(&inet_diag_register_lock); | |
881 | err = -EEXIST; | |
882 | if (inet_diag_table[type] == NULL) { | |
883 | inet_diag_table[type] = h; | |
884 | err = 0; | |
885 | } | |
886 | spin_unlock(&inet_diag_register_lock); | |
887 | out: | |
888 | return err; | |
889 | } | |
890 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
891 | ||
892 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
893 | { | |
894 | const __u16 type = h->idiag_type; | |
895 | ||
896 | if (type >= INET_DIAG_GETSOCK_MAX) | |
897 | return; | |
898 | ||
899 | spin_lock(&inet_diag_register_lock); | |
900 | inet_diag_table[type] = NULL; | |
901 | spin_unlock(&inet_diag_register_lock); | |
902 | ||
903 | synchronize_rcu(); | |
904 | } | |
905 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
906 | ||
73c1f4a0 | 907 | static int __init inet_diag_init(void) |
1da177e4 | 908 | { |
4f5736c4 ACM |
909 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
910 | sizeof(struct inet_diag_handler *)); | |
911 | int err = -ENOMEM; | |
912 | ||
913 | inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL); | |
914 | if (!inet_diag_table) | |
915 | goto out; | |
916 | ||
917 | memset(inet_diag_table, 0, inet_diag_table_size); | |
06628607 | 918 | idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, 0, inet_diag_rcv, |
73c1f4a0 ACM |
919 | THIS_MODULE); |
920 | if (idiagnl == NULL) | |
4f5736c4 | 921 | goto out_free_table; |
17b085ea | 922 | err = 0; |
4f5736c4 ACM |
923 | out: |
924 | return err; | |
4f5736c4 ACM |
925 | out_free_table: |
926 | kfree(inet_diag_table); | |
927 | goto out; | |
1da177e4 LT |
928 | } |
929 | ||
73c1f4a0 | 930 | static void __exit inet_diag_exit(void) |
1da177e4 | 931 | { |
73c1f4a0 | 932 | sock_release(idiagnl->sk_socket); |
4f5736c4 | 933 | kfree(inet_diag_table); |
1da177e4 LT |
934 | } |
935 | ||
73c1f4a0 ACM |
936 | module_init(inet_diag_init); |
937 | module_exit(inet_diag_exit); | |
1da177e4 | 938 | MODULE_LICENSE("GPL"); |