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[NET] IPV4: Fix whitespace errors.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ipv4 / inet_diag.c
1 /*
2 * inet_diag.c Module for monitoring INET transport protocols sockets.
3 *
4 * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
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/module.h>
15 #include <linux/types.h>
16 #include <linux/fcntl.h>
17 #include <linux/random.h>
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>
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>
30
31 #include <linux/inet.h>
32 #include <linux/stddef.h>
33
34 #include <linux/inet_diag.h>
35
36 static const struct inet_diag_handler **inet_diag_table;
37
38 struct inet_diag_entry {
39 __be32 *saddr;
40 __be32 *daddr;
41 u16 sport;
42 u16 dport;
43 u16 family;
44 u16 userlocks;
45 };
46
47 static struct sock *idiagnl;
48
49 #define INET_DIAG_PUT(skb, attrtype, attrlen) \
50 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
51
52 static int inet_csk_diag_fill(struct sock *sk,
53 struct sk_buff *skb,
54 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
55 const struct nlmsghdr *unlh)
56 {
57 const struct inet_sock *inet = inet_sk(sk);
58 const struct inet_connection_sock *icsk = inet_csk(sk);
59 struct inet_diag_msg *r;
60 struct nlmsghdr *nlh;
61 void *info = NULL;
62 struct inet_diag_meminfo *minfo = NULL;
63 unsigned char *b = skb->tail;
64 const struct inet_diag_handler *handler;
65
66 handler = inet_diag_table[unlh->nlmsg_type];
67 BUG_ON(handler == NULL);
68
69 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
70 nlh->nlmsg_flags = nlmsg_flags;
71
72 r = NLMSG_DATA(nlh);
73 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
74
75 if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
76 minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
77
78 if (ext & (1 << (INET_DIAG_INFO - 1)))
79 info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
80 handler->idiag_info_size);
81
82 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
83 const size_t len = strlen(icsk->icsk_ca_ops->name);
84
85 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
86 icsk->icsk_ca_ops->name);
87 }
88
89 r->idiag_family = sk->sk_family;
90 r->idiag_state = sk->sk_state;
91 r->idiag_timer = 0;
92 r->idiag_retrans = 0;
93
94 r->id.idiag_if = sk->sk_bound_dev_if;
95 r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
96 r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
97
98 r->id.idiag_sport = inet->sport;
99 r->id.idiag_dport = inet->dport;
100 r->id.idiag_src[0] = inet->rcv_saddr;
101 r->id.idiag_dst[0] = inet->daddr;
102
103 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
104 if (r->idiag_family == AF_INET6) {
105 struct ipv6_pinfo *np = inet6_sk(sk);
106
107 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
108 &np->rcv_saddr);
109 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
110 &np->daddr);
111 }
112 #endif
113
114 #define EXPIRES_IN_MS(tmo) ((tmo - jiffies) * 1000 + HZ - 1) / HZ
115
116 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
117 r->idiag_timer = 1;
118 r->idiag_retrans = icsk->icsk_retransmits;
119 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
120 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
121 r->idiag_timer = 4;
122 r->idiag_retrans = icsk->icsk_probes_out;
123 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
124 } else if (timer_pending(&sk->sk_timer)) {
125 r->idiag_timer = 2;
126 r->idiag_retrans = icsk->icsk_probes_out;
127 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
128 } else {
129 r->idiag_timer = 0;
130 r->idiag_expires = 0;
131 }
132 #undef EXPIRES_IN_MS
133
134 r->idiag_uid = sock_i_uid(sk);
135 r->idiag_inode = sock_i_ino(sk);
136
137 if (minfo) {
138 minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
139 minfo->idiag_wmem = sk->sk_wmem_queued;
140 minfo->idiag_fmem = sk->sk_forward_alloc;
141 minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
142 }
143
144 handler->idiag_get_info(sk, r, info);
145
146 if (sk->sk_state < TCP_TIME_WAIT &&
147 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
148 icsk->icsk_ca_ops->get_info(sk, ext, skb);
149
150 nlh->nlmsg_len = skb->tail - b;
151 return skb->len;
152
153 rtattr_failure:
154 nlmsg_failure:
155 skb_trim(skb, b - skb->data);
156 return -EMSGSIZE;
157 }
158
159 static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
160 struct sk_buff *skb, int ext, u32 pid,
161 u32 seq, u16 nlmsg_flags,
162 const struct nlmsghdr *unlh)
163 {
164 long tmo;
165 struct inet_diag_msg *r;
166 const unsigned char *previous_tail = skb->tail;
167 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
168 unlh->nlmsg_type, sizeof(*r));
169
170 r = NLMSG_DATA(nlh);
171 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
172
173 nlh->nlmsg_flags = nlmsg_flags;
174
175 tmo = tw->tw_ttd - jiffies;
176 if (tmo < 0)
177 tmo = 0;
178
179 r->idiag_family = tw->tw_family;
180 r->idiag_state = tw->tw_state;
181 r->idiag_timer = 0;
182 r->idiag_retrans = 0;
183 r->id.idiag_if = tw->tw_bound_dev_if;
184 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
185 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
186 r->id.idiag_sport = tw->tw_sport;
187 r->id.idiag_dport = tw->tw_dport;
188 r->id.idiag_src[0] = tw->tw_rcv_saddr;
189 r->id.idiag_dst[0] = tw->tw_daddr;
190 r->idiag_state = tw->tw_substate;
191 r->idiag_timer = 3;
192 r->idiag_expires = (tmo * 1000 + HZ - 1) / HZ;
193 r->idiag_rqueue = 0;
194 r->idiag_wqueue = 0;
195 r->idiag_uid = 0;
196 r->idiag_inode = 0;
197 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
198 if (tw->tw_family == AF_INET6) {
199 const struct inet6_timewait_sock *tw6 =
200 inet6_twsk((struct sock *)tw);
201
202 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
203 &tw6->tw_v6_rcv_saddr);
204 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
205 &tw6->tw_v6_daddr);
206 }
207 #endif
208 nlh->nlmsg_len = skb->tail - previous_tail;
209 return skb->len;
210 nlmsg_failure:
211 skb_trim(skb, previous_tail - skb->data);
212 return -EMSGSIZE;
213 }
214
215 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
216 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
217 const struct nlmsghdr *unlh)
218 {
219 if (sk->sk_state == TCP_TIME_WAIT)
220 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
221 skb, ext, pid, seq, nlmsg_flags,
222 unlh);
223 return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
224 }
225
226 static int inet_diag_get_exact(struct sk_buff *in_skb,
227 const struct nlmsghdr *nlh)
228 {
229 int err;
230 struct sock *sk;
231 struct inet_diag_req *req = NLMSG_DATA(nlh);
232 struct sk_buff *rep;
233 struct inet_hashinfo *hashinfo;
234 const struct inet_diag_handler *handler;
235
236 handler = inet_diag_table[nlh->nlmsg_type];
237 BUG_ON(handler == NULL);
238 hashinfo = handler->idiag_hashinfo;
239
240 if (req->idiag_family == AF_INET) {
241 sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
242 req->id.idiag_dport, req->id.idiag_src[0],
243 req->id.idiag_sport, req->id.idiag_if);
244 }
245 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
246 else if (req->idiag_family == AF_INET6) {
247 sk = inet6_lookup(hashinfo,
248 (struct in6_addr *)req->id.idiag_dst,
249 req->id.idiag_dport,
250 (struct in6_addr *)req->id.idiag_src,
251 req->id.idiag_sport,
252 req->id.idiag_if);
253 }
254 #endif
255 else {
256 return -EINVAL;
257 }
258
259 if (sk == NULL)
260 return -ENOENT;
261
262 err = -ESTALE;
263 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
264 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
265 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
266 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
267 goto out;
268
269 err = -ENOMEM;
270 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
271 sizeof(struct inet_diag_meminfo) +
272 handler->idiag_info_size + 64)),
273 GFP_KERNEL);
274 if (!rep)
275 goto out;
276
277 err = sk_diag_fill(sk, rep, req->idiag_ext,
278 NETLINK_CB(in_skb).pid,
279 nlh->nlmsg_seq, 0, nlh);
280 if (err < 0) {
281 WARN_ON(err == -EMSGSIZE);
282 kfree_skb(rep);
283 goto out;
284 }
285 err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
286 MSG_DONTWAIT);
287 if (err > 0)
288 err = 0;
289
290 out:
291 if (sk) {
292 if (sk->sk_state == TCP_TIME_WAIT)
293 inet_twsk_put((struct inet_timewait_sock *)sk);
294 else
295 sock_put(sk);
296 }
297 return err;
298 }
299
300 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
301 {
302 int words = bits >> 5;
303
304 bits &= 0x1f;
305
306 if (words) {
307 if (memcmp(a1, a2, words << 2))
308 return 0;
309 }
310 if (bits) {
311 __be32 w1, w2;
312 __be32 mask;
313
314 w1 = a1[words];
315 w2 = a2[words];
316
317 mask = htonl((0xffffffff) << (32 - bits));
318
319 if ((w1 ^ w2) & mask)
320 return 0;
321 }
322
323 return 1;
324 }
325
326
327 static int inet_diag_bc_run(const void *bc, int len,
328 const struct inet_diag_entry *entry)
329 {
330 while (len > 0) {
331 int yes = 1;
332 const struct inet_diag_bc_op *op = bc;
333
334 switch (op->code) {
335 case INET_DIAG_BC_NOP:
336 break;
337 case INET_DIAG_BC_JMP:
338 yes = 0;
339 break;
340 case INET_DIAG_BC_S_GE:
341 yes = entry->sport >= op[1].no;
342 break;
343 case INET_DIAG_BC_S_LE:
344 yes = entry->dport <= op[1].no;
345 break;
346 case INET_DIAG_BC_D_GE:
347 yes = entry->dport >= op[1].no;
348 break;
349 case INET_DIAG_BC_D_LE:
350 yes = entry->dport <= op[1].no;
351 break;
352 case INET_DIAG_BC_AUTO:
353 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
354 break;
355 case INET_DIAG_BC_S_COND:
356 case INET_DIAG_BC_D_COND: {
357 struct inet_diag_hostcond *cond;
358 __be32 *addr;
359
360 cond = (struct inet_diag_hostcond *)(op + 1);
361 if (cond->port != -1 &&
362 cond->port != (op->code == INET_DIAG_BC_S_COND ?
363 entry->sport : entry->dport)) {
364 yes = 0;
365 break;
366 }
367
368 if (cond->prefix_len == 0)
369 break;
370
371 if (op->code == INET_DIAG_BC_S_COND)
372 addr = entry->saddr;
373 else
374 addr = entry->daddr;
375
376 if (bitstring_match(addr, cond->addr,
377 cond->prefix_len))
378 break;
379 if (entry->family == AF_INET6 &&
380 cond->family == AF_INET) {
381 if (addr[0] == 0 && addr[1] == 0 &&
382 addr[2] == htonl(0xffff) &&
383 bitstring_match(addr + 3, cond->addr,
384 cond->prefix_len))
385 break;
386 }
387 yes = 0;
388 break;
389 }
390 }
391
392 if (yes) {
393 len -= op->yes;
394 bc += op->yes;
395 } else {
396 len -= op->no;
397 bc += op->no;
398 }
399 }
400 return (len == 0);
401 }
402
403 static int valid_cc(const void *bc, int len, int cc)
404 {
405 while (len >= 0) {
406 const struct inet_diag_bc_op *op = bc;
407
408 if (cc > len)
409 return 0;
410 if (cc == len)
411 return 1;
412 if (op->yes < 4)
413 return 0;
414 len -= op->yes;
415 bc += op->yes;
416 }
417 return 0;
418 }
419
420 static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
421 {
422 const unsigned char *bc = bytecode;
423 int len = bytecode_len;
424
425 while (len > 0) {
426 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
427
428 //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
429 switch (op->code) {
430 case INET_DIAG_BC_AUTO:
431 case INET_DIAG_BC_S_COND:
432 case INET_DIAG_BC_D_COND:
433 case INET_DIAG_BC_S_GE:
434 case INET_DIAG_BC_S_LE:
435 case INET_DIAG_BC_D_GE:
436 case INET_DIAG_BC_D_LE:
437 if (op->yes < 4 || op->yes > len + 4)
438 return -EINVAL;
439 case INET_DIAG_BC_JMP:
440 if (op->no < 4 || op->no > len + 4)
441 return -EINVAL;
442 if (op->no < len &&
443 !valid_cc(bytecode, bytecode_len, len - op->no))
444 return -EINVAL;
445 break;
446 case INET_DIAG_BC_NOP:
447 if (op->yes < 4 || op->yes > len + 4)
448 return -EINVAL;
449 break;
450 default:
451 return -EINVAL;
452 }
453 bc += op->yes;
454 len -= op->yes;
455 }
456 return len == 0 ? 0 : -EINVAL;
457 }
458
459 static int inet_csk_diag_dump(struct sock *sk,
460 struct sk_buff *skb,
461 struct netlink_callback *cb)
462 {
463 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
464
465 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
466 struct inet_diag_entry entry;
467 struct rtattr *bc = (struct rtattr *)(r + 1);
468 struct inet_sock *inet = inet_sk(sk);
469
470 entry.family = sk->sk_family;
471 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
472 if (entry.family == AF_INET6) {
473 struct ipv6_pinfo *np = inet6_sk(sk);
474
475 entry.saddr = np->rcv_saddr.s6_addr32;
476 entry.daddr = np->daddr.s6_addr32;
477 } else
478 #endif
479 {
480 entry.saddr = &inet->rcv_saddr;
481 entry.daddr = &inet->daddr;
482 }
483 entry.sport = inet->num;
484 entry.dport = ntohs(inet->dport);
485 entry.userlocks = sk->sk_userlocks;
486
487 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
488 return 0;
489 }
490
491 return inet_csk_diag_fill(sk, skb, r->idiag_ext,
492 NETLINK_CB(cb->skb).pid,
493 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
494 }
495
496 static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
497 struct sk_buff *skb,
498 struct netlink_callback *cb)
499 {
500 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
501
502 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
503 struct inet_diag_entry entry;
504 struct rtattr *bc = (struct rtattr *)(r + 1);
505
506 entry.family = tw->tw_family;
507 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
508 if (tw->tw_family == AF_INET6) {
509 struct inet6_timewait_sock *tw6 =
510 inet6_twsk((struct sock *)tw);
511 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
512 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
513 } else
514 #endif
515 {
516 entry.saddr = &tw->tw_rcv_saddr;
517 entry.daddr = &tw->tw_daddr;
518 }
519 entry.sport = tw->tw_num;
520 entry.dport = ntohs(tw->tw_dport);
521 entry.userlocks = 0;
522
523 if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
524 return 0;
525 }
526
527 return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
528 NETLINK_CB(cb->skb).pid,
529 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
530 }
531
532 static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
533 struct request_sock *req, u32 pid, u32 seq,
534 const struct nlmsghdr *unlh)
535 {
536 const struct inet_request_sock *ireq = inet_rsk(req);
537 struct inet_sock *inet = inet_sk(sk);
538 unsigned char *b = skb->tail;
539 struct inet_diag_msg *r;
540 struct nlmsghdr *nlh;
541 long tmo;
542
543 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
544 nlh->nlmsg_flags = NLM_F_MULTI;
545 r = NLMSG_DATA(nlh);
546
547 r->idiag_family = sk->sk_family;
548 r->idiag_state = TCP_SYN_RECV;
549 r->idiag_timer = 1;
550 r->idiag_retrans = req->retrans;
551
552 r->id.idiag_if = sk->sk_bound_dev_if;
553 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
554 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
555
556 tmo = req->expires - jiffies;
557 if (tmo < 0)
558 tmo = 0;
559
560 r->id.idiag_sport = inet->sport;
561 r->id.idiag_dport = ireq->rmt_port;
562 r->id.idiag_src[0] = ireq->loc_addr;
563 r->id.idiag_dst[0] = ireq->rmt_addr;
564 r->idiag_expires = jiffies_to_msecs(tmo);
565 r->idiag_rqueue = 0;
566 r->idiag_wqueue = 0;
567 r->idiag_uid = sock_i_uid(sk);
568 r->idiag_inode = 0;
569 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
570 if (r->idiag_family == AF_INET6) {
571 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
572 &inet6_rsk(req)->loc_addr);
573 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
574 &inet6_rsk(req)->rmt_addr);
575 }
576 #endif
577 nlh->nlmsg_len = skb->tail - b;
578
579 return skb->len;
580
581 nlmsg_failure:
582 skb_trim(skb, b - skb->data);
583 return -1;
584 }
585
586 static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
587 struct netlink_callback *cb)
588 {
589 struct inet_diag_entry entry;
590 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
591 struct inet_connection_sock *icsk = inet_csk(sk);
592 struct listen_sock *lopt;
593 struct rtattr *bc = NULL;
594 struct inet_sock *inet = inet_sk(sk);
595 int j, s_j;
596 int reqnum, s_reqnum;
597 int err = 0;
598
599 s_j = cb->args[3];
600 s_reqnum = cb->args[4];
601
602 if (s_j > 0)
603 s_j--;
604
605 entry.family = sk->sk_family;
606
607 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
608
609 lopt = icsk->icsk_accept_queue.listen_opt;
610 if (!lopt || !lopt->qlen)
611 goto out;
612
613 if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
614 bc = (struct rtattr *)(r + 1);
615 entry.sport = inet->num;
616 entry.userlocks = sk->sk_userlocks;
617 }
618
619 for (j = s_j; j < lopt->nr_table_entries; j++) {
620 struct request_sock *req, *head = lopt->syn_table[j];
621
622 reqnum = 0;
623 for (req = head; req; reqnum++, req = req->dl_next) {
624 struct inet_request_sock *ireq = inet_rsk(req);
625
626 if (reqnum < s_reqnum)
627 continue;
628 if (r->id.idiag_dport != ireq->rmt_port &&
629 r->id.idiag_dport)
630 continue;
631
632 if (bc) {
633 entry.saddr =
634 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
635 (entry.family == AF_INET6) ?
636 inet6_rsk(req)->loc_addr.s6_addr32 :
637 #endif
638 &ireq->loc_addr;
639 entry.daddr =
640 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
641 (entry.family == AF_INET6) ?
642 inet6_rsk(req)->rmt_addr.s6_addr32 :
643 #endif
644 &ireq->rmt_addr;
645 entry.dport = ntohs(ireq->rmt_port);
646
647 if (!inet_diag_bc_run(RTA_DATA(bc),
648 RTA_PAYLOAD(bc), &entry))
649 continue;
650 }
651
652 err = inet_diag_fill_req(skb, sk, req,
653 NETLINK_CB(cb->skb).pid,
654 cb->nlh->nlmsg_seq, cb->nlh);
655 if (err < 0) {
656 cb->args[3] = j + 1;
657 cb->args[4] = reqnum;
658 goto out;
659 }
660 }
661
662 s_reqnum = 0;
663 }
664
665 out:
666 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
667
668 return err;
669 }
670
671 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
672 {
673 int i, num;
674 int s_i, s_num;
675 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
676 const struct inet_diag_handler *handler;
677 struct inet_hashinfo *hashinfo;
678
679 handler = inet_diag_table[cb->nlh->nlmsg_type];
680 BUG_ON(handler == NULL);
681 hashinfo = handler->idiag_hashinfo;
682
683 s_i = cb->args[1];
684 s_num = num = cb->args[2];
685
686 if (cb->args[0] == 0) {
687 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
688 goto skip_listen_ht;
689
690 inet_listen_lock(hashinfo);
691 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
692 struct sock *sk;
693 struct hlist_node *node;
694
695 num = 0;
696 sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
697 struct inet_sock *inet = inet_sk(sk);
698
699 if (num < s_num) {
700 num++;
701 continue;
702 }
703
704 if (r->id.idiag_sport != inet->sport &&
705 r->id.idiag_sport)
706 goto next_listen;
707
708 if (!(r->idiag_states & TCPF_LISTEN) ||
709 r->id.idiag_dport ||
710 cb->args[3] > 0)
711 goto syn_recv;
712
713 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
714 inet_listen_unlock(hashinfo);
715 goto done;
716 }
717
718 syn_recv:
719 if (!(r->idiag_states & TCPF_SYN_RECV))
720 goto next_listen;
721
722 if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
723 inet_listen_unlock(hashinfo);
724 goto done;
725 }
726
727 next_listen:
728 cb->args[3] = 0;
729 cb->args[4] = 0;
730 ++num;
731 }
732
733 s_num = 0;
734 cb->args[3] = 0;
735 cb->args[4] = 0;
736 }
737 inet_listen_unlock(hashinfo);
738 skip_listen_ht:
739 cb->args[0] = 1;
740 s_i = num = s_num = 0;
741 }
742
743 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
744 return skb->len;
745
746 for (i = s_i; i < hashinfo->ehash_size; i++) {
747 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
748 struct sock *sk;
749 struct hlist_node *node;
750
751 if (i > s_i)
752 s_num = 0;
753
754 read_lock_bh(&head->lock);
755 num = 0;
756 sk_for_each(sk, node, &head->chain) {
757 struct inet_sock *inet = inet_sk(sk);
758
759 if (num < s_num)
760 goto next_normal;
761 if (!(r->idiag_states & (1 << sk->sk_state)))
762 goto next_normal;
763 if (r->id.idiag_sport != inet->sport &&
764 r->id.idiag_sport)
765 goto next_normal;
766 if (r->id.idiag_dport != inet->dport &&
767 r->id.idiag_dport)
768 goto next_normal;
769 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
770 read_unlock_bh(&head->lock);
771 goto done;
772 }
773 next_normal:
774 ++num;
775 }
776
777 if (r->idiag_states & TCPF_TIME_WAIT) {
778 struct inet_timewait_sock *tw;
779
780 inet_twsk_for_each(tw, node,
781 &head->twchain) {
782
783 if (num < s_num)
784 goto next_dying;
785 if (r->id.idiag_sport != tw->tw_sport &&
786 r->id.idiag_sport)
787 goto next_dying;
788 if (r->id.idiag_dport != tw->tw_dport &&
789 r->id.idiag_dport)
790 goto next_dying;
791 if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
792 read_unlock_bh(&head->lock);
793 goto done;
794 }
795 next_dying:
796 ++num;
797 }
798 }
799 read_unlock_bh(&head->lock);
800 }
801
802 done:
803 cb->args[1] = i;
804 cb->args[2] = num;
805 return skb->len;
806 }
807
808 static inline int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
809 {
810 if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
811 return 0;
812
813 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX)
814 goto err_inval;
815
816 if (inet_diag_table[nlh->nlmsg_type] == NULL)
817 return -ENOENT;
818
819 if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len)
820 goto err_inval;
821
822 if (nlh->nlmsg_flags&NLM_F_DUMP) {
823 if (nlh->nlmsg_len >
824 (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) {
825 struct rtattr *rta = (void *)(NLMSG_DATA(nlh) +
826 sizeof(struct inet_diag_req));
827 if (rta->rta_type != INET_DIAG_REQ_BYTECODE ||
828 rta->rta_len < 8 ||
829 rta->rta_len >
830 (nlh->nlmsg_len -
831 NLMSG_SPACE(sizeof(struct inet_diag_req))))
832 goto err_inval;
833 if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta)))
834 goto err_inval;
835 }
836 return netlink_dump_start(idiagnl, skb, nlh,
837 inet_diag_dump, NULL);
838 } else
839 return inet_diag_get_exact(skb, nlh);
840
841 err_inval:
842 return -EINVAL;
843 }
844
845
846 static inline void inet_diag_rcv_skb(struct sk_buff *skb)
847 {
848 if (skb->len >= NLMSG_SPACE(0)) {
849 int err;
850 struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data;
851
852 if (nlh->nlmsg_len < sizeof(*nlh) ||
853 skb->len < nlh->nlmsg_len)
854 return;
855 err = inet_diag_rcv_msg(skb, nlh);
856 if (err || nlh->nlmsg_flags & NLM_F_ACK)
857 netlink_ack(skb, nlh, err);
858 }
859 }
860
861 static void inet_diag_rcv(struct sock *sk, int len)
862 {
863 struct sk_buff *skb;
864 unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
865
866 while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) {
867 inet_diag_rcv_skb(skb);
868 kfree_skb(skb);
869 }
870 }
871
872 static DEFINE_SPINLOCK(inet_diag_register_lock);
873
874 int inet_diag_register(const struct inet_diag_handler *h)
875 {
876 const __u16 type = h->idiag_type;
877 int err = -EINVAL;
878
879 if (type >= INET_DIAG_GETSOCK_MAX)
880 goto out;
881
882 spin_lock(&inet_diag_register_lock);
883 err = -EEXIST;
884 if (inet_diag_table[type] == NULL) {
885 inet_diag_table[type] = h;
886 err = 0;
887 }
888 spin_unlock(&inet_diag_register_lock);
889 out:
890 return err;
891 }
892 EXPORT_SYMBOL_GPL(inet_diag_register);
893
894 void inet_diag_unregister(const struct inet_diag_handler *h)
895 {
896 const __u16 type = h->idiag_type;
897
898 if (type >= INET_DIAG_GETSOCK_MAX)
899 return;
900
901 spin_lock(&inet_diag_register_lock);
902 inet_diag_table[type] = NULL;
903 spin_unlock(&inet_diag_register_lock);
904
905 synchronize_rcu();
906 }
907 EXPORT_SYMBOL_GPL(inet_diag_unregister);
908
909 static int __init inet_diag_init(void)
910 {
911 const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
912 sizeof(struct inet_diag_handler *));
913 int err = -ENOMEM;
914
915 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
916 if (!inet_diag_table)
917 goto out;
918
919 idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, 0, inet_diag_rcv,
920 THIS_MODULE);
921 if (idiagnl == NULL)
922 goto out_free_table;
923 err = 0;
924 out:
925 return err;
926 out_free_table:
927 kfree(inet_diag_table);
928 goto out;
929 }
930
931 static void __exit inet_diag_exit(void)
932 {
933 sock_release(idiagnl->sk_socket);
934 kfree(inet_diag_table);
935 }
936
937 module_init(inet_diag_init);
938 module_exit(inet_diag_exit);
939 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)