1
2
3
4
5
6
7
8
9
10
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/types.h>
15#include <linux/fcntl.h>
16#include <linux/random.h>
17#include <linux/cache.h>
18#include <linux/init.h>
19#include <linux/time.h>
20
21#include <net/icmp.h>
22#include <net/tcp.h>
23#include <net/ipv6.h>
24#include <net/inet_common.h>
25#include <net/inet_connection_sock.h>
26#include <net/inet_hashtables.h>
27#include <net/inet_timewait_sock.h>
28#include <net/inet6_hashtables.h>
29#include <net/netlink.h>
30
31#include <linux/inet.h>
32#include <linux/stddef.h>
33
34#include <linux/inet_diag.h>
35
36static const struct inet_diag_handler **inet_diag_table;
37
38struct inet_diag_entry {
39 __be32 *saddr;
40 __be32 *daddr;
41 u16 sport;
42 u16 dport;
43 u16 family;
44 u16 userlocks;
45};
46
47static struct sock *idiagnl;
48
49#define INET_DIAG_PUT(skb, attrtype, attrlen) \
50 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
51
52static DEFINE_MUTEX(inet_diag_table_mutex);
53
54static const struct inet_diag_handler *inet_diag_lock_handler(int type)
55{
56#ifdef CONFIG_KMOD
57 if (!inet_diag_table[type])
58 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
59 NETLINK_INET_DIAG, type);
60#endif
61
62 mutex_lock(&inet_diag_table_mutex);
63 if (!inet_diag_table[type])
64 return ERR_PTR(-ENOENT);
65
66 return inet_diag_table[type];
67}
68
69static inline void inet_diag_unlock_handler(
70 const struct inet_diag_handler *handler)
71{
72 mutex_unlock(&inet_diag_table_mutex);
73}
74
75static int inet_csk_diag_fill(struct sock *sk,
76 struct sk_buff *skb,
77 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
78 const struct nlmsghdr *unlh)
79{
80 const struct inet_sock *inet = inet_sk(sk);
81 const struct inet_connection_sock *icsk = inet_csk(sk);
82 struct inet_diag_msg *r;
83 struct nlmsghdr *nlh;
84 void *info = NULL;
85 struct inet_diag_meminfo *minfo = NULL;
86 unsigned char *b = skb_tail_pointer(skb);
87 const struct inet_diag_handler *handler;
88
89 handler = inet_diag_table[unlh->nlmsg_type];
90 BUG_ON(handler == NULL);
91
92 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
93 nlh->nlmsg_flags = nlmsg_flags;
94
95 r = NLMSG_DATA(nlh);
96 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
97
98 if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
99 minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
100
101 if (ext & (1 << (INET_DIAG_INFO - 1)))
102 info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
103 handler->idiag_info_size);
104
105 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
106 const size_t len = strlen(icsk->icsk_ca_ops->name);
107
108 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
109 icsk->icsk_ca_ops->name);
110 }
111
112 r->idiag_family = sk->sk_family;
113 r->idiag_state = sk->sk_state;
114 r->idiag_timer = 0;
115 r->idiag_retrans = 0;
116
117 r->id.idiag_if = sk->sk_bound_dev_if;
118 r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
119 r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
120
121 r->id.idiag_sport = inet->sport;
122 r->id.idiag_dport = inet->dport;
123 r->id.idiag_src[0] = inet->rcv_saddr;
124 r->id.idiag_dst[0] = inet->daddr;
125
126#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
127 if (r->idiag_family == AF_INET6) {
128 struct ipv6_pinfo *np = inet6_sk(sk);
129
130 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
131 &np->rcv_saddr);
132 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
133 &np->daddr);
134 }
135#endif
136
137#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
138
139 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
140 r->idiag_timer = 1;
141 r->idiag_retrans = icsk->icsk_retransmits;
142 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
143 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
144 r->idiag_timer = 4;
145 r->idiag_retrans = icsk->icsk_probes_out;
146 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
147 } else if (timer_pending(&sk->sk_timer)) {
148 r->idiag_timer = 2;
149 r->idiag_retrans = icsk->icsk_probes_out;
150 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
151 } else {
152 r->idiag_timer = 0;
153 r->idiag_expires = 0;
154 }
155#undef EXPIRES_IN_MS
156
157 r->idiag_uid = sock_i_uid(sk);
158 r->idiag_inode = sock_i_ino(sk);
159
160 if (minfo) {
161 minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
162 minfo->idiag_wmem = sk->sk_wmem_queued;
163 minfo->idiag_fmem = sk->sk_forward_alloc;
164 minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
165 }
166
167 handler->idiag_get_info(sk, r, info);
168
169 if (sk->sk_state < TCP_TIME_WAIT &&
170 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
171 icsk->icsk_ca_ops->get_info(sk, ext, skb);
172
173 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
174 return skb->len;
175
176rtattr_failure:
177nlmsg_failure:
178 nlmsg_trim(skb, b);
179 return -EMSGSIZE;
180}
181
182static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
183 struct sk_buff *skb, int ext, u32 pid,
184 u32 seq, u16 nlmsg_flags,
185 const struct nlmsghdr *unlh)
186{
187 long tmo;
188 struct inet_diag_msg *r;
189 const unsigned char *previous_tail = skb_tail_pointer(skb);
190 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
191 unlh->nlmsg_type, sizeof(*r));
192
193 r = NLMSG_DATA(nlh);
194 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
195
196 nlh->nlmsg_flags = nlmsg_flags;
197
198 tmo = tw->tw_ttd - jiffies;
199 if (tmo < 0)
200 tmo = 0;
201
202 r->idiag_family = tw->tw_family;
203 r->idiag_state = tw->tw_state;
204 r->idiag_timer = 0;
205 r->idiag_retrans = 0;
206 r->id.idiag_if = tw->tw_bound_dev_if;
207 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
208 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
209 r->id.idiag_sport = tw->tw_sport;
210 r->id.idiag_dport = tw->tw_dport;
211 r->id.idiag_src[0] = tw->tw_rcv_saddr;
212 r->id.idiag_dst[0] = tw->tw_daddr;
213 r->idiag_state = tw->tw_substate;
214 r->idiag_timer = 3;
215 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
216 r->idiag_rqueue = 0;
217 r->idiag_wqueue = 0;
218 r->idiag_uid = 0;
219 r->idiag_inode = 0;
220#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
221 if (tw->tw_family == AF_INET6) {
222 const struct inet6_timewait_sock *tw6 =
223 inet6_twsk((struct sock *)tw);
224
225 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
226 &tw6->tw_v6_rcv_saddr);
227 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
228 &tw6->tw_v6_daddr);
229 }
230#endif
231 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
232 return skb->len;
233nlmsg_failure:
234 nlmsg_trim(skb, previous_tail);
235 return -EMSGSIZE;
236}
237
238static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
239 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
240 const struct nlmsghdr *unlh)
241{
242 if (sk->sk_state == TCP_TIME_WAIT)
243 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
244 skb, ext, pid, seq, nlmsg_flags,
245 unlh);
246 return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
247}
248
249static int inet_diag_get_exact(struct sk_buff *in_skb,
250 const struct nlmsghdr *nlh)
251{
252 int err;
253 struct sock *sk;
254 struct inet_diag_req *req = NLMSG_DATA(nlh);
255 struct sk_buff *rep;
256 struct inet_hashinfo *hashinfo;
257 const struct inet_diag_handler *handler;
258
259 handler = inet_diag_lock_handler(nlh->nlmsg_type);
260 if (IS_ERR(handler)) {
261 err = PTR_ERR(handler);
262 goto unlock;
263 }
264
265 hashinfo = handler->idiag_hashinfo;
266 err = -EINVAL;
267
268 if (req->idiag_family == AF_INET) {
269 sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0],
270 req->id.idiag_dport, req->id.idiag_src[0],
271 req->id.idiag_sport, req->id.idiag_if);
272 }
273#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
274 else if (req->idiag_family == AF_INET6) {
275 sk = inet6_lookup(&init_net, hashinfo,
276 (struct in6_addr *)req->id.idiag_dst,
277 req->id.idiag_dport,
278 (struct in6_addr *)req->id.idiag_src,
279 req->id.idiag_sport,
280 req->id.idiag_if);
281 }
282#endif
283 else {
284 goto unlock;
285 }
286
287 err = -ENOENT;
288 if (sk == NULL)
289 goto unlock;
290
291 err = -ESTALE;
292 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
293 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
294 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
295 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
296 goto out;
297
298 err = -ENOMEM;
299 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
300 sizeof(struct inet_diag_meminfo) +
301 handler->idiag_info_size + 64)),
302 GFP_KERNEL);
303 if (!rep)
304 goto out;
305
306 err = sk_diag_fill(sk, rep, req->idiag_ext,
307 NETLINK_CB(in_skb).pid,
308 nlh->nlmsg_seq, 0, nlh);
309 if (err < 0) {
310 WARN_ON(err == -EMSGSIZE);
311 kfree_skb(rep);
312 goto out;
313 }
314 err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
315 MSG_DONTWAIT);
316 if (err > 0)
317 err = 0;
318
319out:
320 if (sk) {
321 if (sk->sk_state == TCP_TIME_WAIT)
322 inet_twsk_put((struct inet_timewait_sock *)sk);
323 else
324 sock_put(sk);
325 }
326unlock:
327 inet_diag_unlock_handler(handler);
328 return err;
329}
330
331static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
332{
333 int words = bits >> 5;
334
335 bits &= 0x1f;
336
337 if (words) {
338 if (memcmp(a1, a2, words << 2))
339 return 0;
340 }
341 if (bits) {
342 __be32 w1, w2;
343 __be32 mask;
344
345 w1 = a1[words];
346 w2 = a2[words];
347
348 mask = htonl((0xffffffff) << (32 - bits));
349
350 if ((w1 ^ w2) & mask)
351 return 0;
352 }
353
354 return 1;
355}
356
357
358static int inet_diag_bc_run(const void *bc, int len,
359 const struct inet_diag_entry *entry)
360{
361 while (len > 0) {
362 int yes = 1;
363 const struct inet_diag_bc_op *op = bc;
364
365 switch (op->code) {
366 case INET_DIAG_BC_NOP:
367 break;
368 case INET_DIAG_BC_JMP:
369 yes = 0;
370 break;
371 case INET_DIAG_BC_S_GE:
372 yes = entry->sport >= op[1].no;
373 break;
374 case INET_DIAG_BC_S_LE:
375 yes = entry->dport <= op[1].no;
376 break;
377 case INET_DIAG_BC_D_GE:
378 yes = entry->dport >= op[1].no;
379 break;
380 case INET_DIAG_BC_D_LE:
381 yes = entry->dport <= op[1].no;
382 break;
383 case INET_DIAG_BC_AUTO:
384 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
385 break;
386 case INET_DIAG_BC_S_COND:
387 case INET_DIAG_BC_D_COND: {
388 struct inet_diag_hostcond *cond;
389 __be32 *addr;
390
391 cond = (struct inet_diag_hostcond *)(op + 1);
392 if (cond->port != -1 &&
393 cond->port != (op->code == INET_DIAG_BC_S_COND ?
394 entry->sport : entry->dport)) {
395 yes = 0;
396 break;
397 }
398
399 if (cond->prefix_len == 0)
400 break;
401
402 if (op->code == INET_DIAG_BC_S_COND)
403 addr = entry->saddr;
404 else
405 addr = entry->daddr;
406
407 if (bitstring_match(addr, cond->addr,
408 cond->prefix_len))
409 break;
410 if (entry->family == AF_INET6 &&
411 cond->family == AF_INET) {
412 if (addr[0] == 0 && addr[1] == 0 &&
413 addr[2] == htonl(0xffff) &&
414 bitstring_match(addr + 3, cond->addr,
415 cond->prefix_len))
416 break;
417 }
418 yes = 0;
419 break;
420 }
421 }
422
423 if (yes) {
424 len -= op->yes;
425 bc += op->yes;
426 } else {
427 len -= op->no;
428 bc += op->no;
429 }
430 }
431 return (len == 0);
432}
433
434static int valid_cc(const void *bc, int len, int cc)
435{
436 while (len >= 0) {
437 const struct inet_diag_bc_op *op = bc;
438
439 if (cc > len)
440 return 0;
441 if (cc == len)
442 return 1;
443 if (op->yes < 4)
444 return 0;
445 len -= op->yes;
446 bc += op->yes;
447 }
448 return 0;
449}
450
451static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
452{
453 const unsigned char *bc = bytecode;
454 int len = bytecode_len;
455
456 while (len > 0) {
457 struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
458
459
460 switch (op->code) {
461 case INET_DIAG_BC_AUTO:
462 case INET_DIAG_BC_S_COND:
463 case INET_DIAG_BC_D_COND:
464 case INET_DIAG_BC_S_GE:
465 case INET_DIAG_BC_S_LE:
466 case INET_DIAG_BC_D_GE:
467 case INET_DIAG_BC_D_LE:
468 if (op->yes < 4 || op->yes > len + 4)
469 return -EINVAL;
470 case INET_DIAG_BC_JMP:
471 if (op->no < 4 || op->no > len + 4)
472 return -EINVAL;
473 if (op->no < len &&
474 !valid_cc(bytecode, bytecode_len, len - op->no))
475 return -EINVAL;
476 break;
477 case INET_DIAG_BC_NOP:
478 if (op->yes < 4 || op->yes > len + 4)
479 return -EINVAL;
480 break;
481 default:
482 return -EINVAL;
483 }
484 bc += op->yes;
485 len -= op->yes;
486 }
487 return len == 0 ? 0 : -EINVAL;
488}
489
490static int inet_csk_diag_dump(struct sock *sk,
491 struct sk_buff *skb,
492 struct netlink_callback *cb)
493{
494 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
495
496 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
497 struct inet_diag_entry entry;
498 const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
499 sizeof(*r),
500 INET_DIAG_REQ_BYTECODE);
501 struct inet_sock *inet = inet_sk(sk);
502
503 entry.family = sk->sk_family;
504#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
505 if (entry.family == AF_INET6) {
506 struct ipv6_pinfo *np = inet6_sk(sk);
507
508 entry.saddr = np->rcv_saddr.s6_addr32;
509 entry.daddr = np->daddr.s6_addr32;
510 } else
511#endif
512 {
513 entry.saddr = &inet->rcv_saddr;
514 entry.daddr = &inet->daddr;
515 }
516 entry.sport = inet->num;
517 entry.dport = ntohs(inet->dport);
518 entry.userlocks = sk->sk_userlocks;
519
520 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
521 return 0;
522 }
523
524 return inet_csk_diag_fill(sk, skb, r->idiag_ext,
525 NETLINK_CB(cb->skb).pid,
526 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
527}
528
529static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
530 struct sk_buff *skb,
531 struct netlink_callback *cb)
532{
533 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
534
535 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
536 struct inet_diag_entry entry;
537 const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
538 sizeof(*r),
539 INET_DIAG_REQ_BYTECODE);
540
541 entry.family = tw->tw_family;
542#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
543 if (tw->tw_family == AF_INET6) {
544 struct inet6_timewait_sock *tw6 =
545 inet6_twsk((struct sock *)tw);
546 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
547 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
548 } else
549#endif
550 {
551 entry.saddr = &tw->tw_rcv_saddr;
552 entry.daddr = &tw->tw_daddr;
553 }
554 entry.sport = tw->tw_num;
555 entry.dport = ntohs(tw->tw_dport);
556 entry.userlocks = 0;
557
558 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
559 return 0;
560 }
561
562 return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
563 NETLINK_CB(cb->skb).pid,
564 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
565}
566
567static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
568 struct request_sock *req, u32 pid, u32 seq,
569 const struct nlmsghdr *unlh)
570{
571 const struct inet_request_sock *ireq = inet_rsk(req);
572 struct inet_sock *inet = inet_sk(sk);
573 unsigned char *b = skb_tail_pointer(skb);
574 struct inet_diag_msg *r;
575 struct nlmsghdr *nlh;
576 long tmo;
577
578 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
579 nlh->nlmsg_flags = NLM_F_MULTI;
580 r = NLMSG_DATA(nlh);
581
582 r->idiag_family = sk->sk_family;
583 r->idiag_state = TCP_SYN_RECV;
584 r->idiag_timer = 1;
585 r->idiag_retrans = req->retrans;
586
587 r->id.idiag_if = sk->sk_bound_dev_if;
588 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
589 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
590
591 tmo = req->expires - jiffies;
592 if (tmo < 0)
593 tmo = 0;
594
595 r->id.idiag_sport = inet->sport;
596 r->id.idiag_dport = ireq->rmt_port;
597 r->id.idiag_src[0] = ireq->loc_addr;
598 r->id.idiag_dst[0] = ireq->rmt_addr;
599 r->idiag_expires = jiffies_to_msecs(tmo);
600 r->idiag_rqueue = 0;
601 r->idiag_wqueue = 0;
602 r->idiag_uid = sock_i_uid(sk);
603 r->idiag_inode = 0;
604#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
605 if (r->idiag_family == AF_INET6) {
606 ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
607 &inet6_rsk(req)->loc_addr);
608 ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
609 &inet6_rsk(req)->rmt_addr);
610 }
611#endif
612 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
613
614 return skb->len;
615
616nlmsg_failure:
617 nlmsg_trim(skb, b);
618 return -1;
619}
620
621static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
622 struct netlink_callback *cb)
623{
624 struct inet_diag_entry entry;
625 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
626 struct inet_connection_sock *icsk = inet_csk(sk);
627 struct listen_sock *lopt;
628 const struct nlattr *bc = NULL;
629 struct inet_sock *inet = inet_sk(sk);
630 int j, s_j;
631 int reqnum, s_reqnum;
632 int err = 0;
633
634 s_j = cb->args[3];
635 s_reqnum = cb->args[4];
636
637 if (s_j > 0)
638 s_j--;
639
640 entry.family = sk->sk_family;
641
642 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
643
644 lopt = icsk->icsk_accept_queue.listen_opt;
645 if (!lopt || !lopt->qlen)
646 goto out;
647
648 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
649 bc = nlmsg_find_attr(cb->nlh, sizeof(*r),
650 INET_DIAG_REQ_BYTECODE);
651 entry.sport = inet->num;
652 entry.userlocks = sk->sk_userlocks;
653 }
654
655 for (j = s_j; j < lopt->nr_table_entries; j++) {
656 struct request_sock *req, *head = lopt->syn_table[j];
657
658 reqnum = 0;
659 for (req = head; req; reqnum++, req = req->dl_next) {
660 struct inet_request_sock *ireq = inet_rsk(req);
661
662 if (reqnum < s_reqnum)
663 continue;
664 if (r->id.idiag_dport != ireq->rmt_port &&
665 r->id.idiag_dport)
666 continue;
667
668 if (bc) {
669 entry.saddr =
670#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
671 (entry.family == AF_INET6) ?
672 inet6_rsk(req)->loc_addr.s6_addr32 :
673#endif
674 &ireq->loc_addr;
675 entry.daddr =
676#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
677 (entry.family == AF_INET6) ?
678 inet6_rsk(req)->rmt_addr.s6_addr32 :
679#endif
680 &ireq->rmt_addr;
681 entry.dport = ntohs(ireq->rmt_port);
682
683 if (!inet_diag_bc_run(nla_data(bc),
684 nla_len(bc), &entry))
685 continue;
686 }
687
688 err = inet_diag_fill_req(skb, sk, req,
689 NETLINK_CB(cb->skb).pid,
690 cb->nlh->nlmsg_seq, cb->nlh);
691 if (err < 0) {
692 cb->args[3] = j + 1;
693 cb->args[4] = reqnum;
694 goto out;
695 }
696 }
697
698 s_reqnum = 0;
699 }
700
701out:
702 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
703
704 return err;
705}
706
707static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
708{
709 int i, num;
710 int s_i, s_num;
711 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
712 const struct inet_diag_handler *handler;
713 struct inet_hashinfo *hashinfo;
714
715 handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
716 if (IS_ERR(handler))
717 goto unlock;
718
719 hashinfo = handler->idiag_hashinfo;
720
721 s_i = cb->args[1];
722 s_num = num = cb->args[2];
723
724 if (cb->args[0] == 0) {
725 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
726 goto skip_listen_ht;
727
728 inet_listen_lock(hashinfo);
729 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
730 struct sock *sk;
731 struct hlist_node *node;
732
733 num = 0;
734 sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
735 struct inet_sock *inet = inet_sk(sk);
736
737 if (num < s_num) {
738 num++;
739 continue;
740 }
741
742 if (r->id.idiag_sport != inet->sport &&
743 r->id.idiag_sport)
744 goto next_listen;
745
746 if (!(r->idiag_states & TCPF_LISTEN) ||
747 r->id.idiag_dport ||
748 cb->args[3] > 0)
749 goto syn_recv;
750
751 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
752 inet_listen_unlock(hashinfo);
753 goto done;
754 }
755
756syn_recv:
757 if (!(r->idiag_states & TCPF_SYN_RECV))
758 goto next_listen;
759
760 if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
761 inet_listen_unlock(hashinfo);
762 goto done;
763 }
764
765next_listen:
766 cb->args[3] = 0;
767 cb->args[4] = 0;
768 ++num;
769 }
770
771 s_num = 0;
772 cb->args[3] = 0;
773 cb->args[4] = 0;
774 }
775 inet_listen_unlock(hashinfo);
776skip_listen_ht:
777 cb->args[0] = 1;
778 s_i = num = s_num = 0;
779 }
780
781 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
782 goto unlock;
783
784 for (i = s_i; i < hashinfo->ehash_size; i++) {
785 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
786 rwlock_t *lock = inet_ehash_lockp(hashinfo, i);
787 struct sock *sk;
788 struct hlist_node *node;
789
790 if (i > s_i)
791 s_num = 0;
792
793 read_lock_bh(lock);
794 num = 0;
795 sk_for_each(sk, node, &head->chain) {
796 struct inet_sock *inet = inet_sk(sk);
797
798 if (num < s_num)
799 goto next_normal;
800 if (!(r->idiag_states & (1 << sk->sk_state)))
801 goto next_normal;
802 if (r->id.idiag_sport != inet->sport &&
803 r->id.idiag_sport)
804 goto next_normal;
805 if (r->id.idiag_dport != inet->dport &&
806 r->id.idiag_dport)
807 goto next_normal;
808 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
809 read_unlock_bh(lock);
810 goto done;
811 }
812next_normal:
813 ++num;
814 }
815
816 if (r->idiag_states & TCPF_TIME_WAIT) {
817 struct inet_timewait_sock *tw;
818
819 inet_twsk_for_each(tw, node,
820 &head->twchain) {
821
822 if (num < s_num)
823 goto next_dying;
824 if (r->id.idiag_sport != tw->tw_sport &&
825 r->id.idiag_sport)
826 goto next_dying;
827 if (r->id.idiag_dport != tw->tw_dport &&
828 r->id.idiag_dport)
829 goto next_dying;
830 if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
831 read_unlock_bh(lock);
832 goto done;
833 }
834next_dying:
835 ++num;
836 }
837 }
838 read_unlock_bh(lock);
839 }
840
841done:
842 cb->args[1] = i;
843 cb->args[2] = num;
844unlock:
845 inet_diag_unlock_handler(handler);
846 return skb->len;
847}
848
849static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
850{
851 int hdrlen = sizeof(struct inet_diag_req);
852
853 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
854 nlmsg_len(nlh) < hdrlen)
855 return -EINVAL;
856
857 if (nlh->nlmsg_flags & NLM_F_DUMP) {
858 if (nlmsg_attrlen(nlh, hdrlen)) {
859 struct nlattr *attr;
860
861 attr = nlmsg_find_attr(nlh, hdrlen,
862 INET_DIAG_REQ_BYTECODE);
863 if (attr == NULL ||
864 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
865 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
866 return -EINVAL;
867 }
868
869 return netlink_dump_start(idiagnl, skb, nlh,
870 inet_diag_dump, NULL);
871 }
872
873 return inet_diag_get_exact(skb, nlh);
874}
875
876static DEFINE_MUTEX(inet_diag_mutex);
877
878static void inet_diag_rcv(struct sk_buff *skb)
879{
880 mutex_lock(&inet_diag_mutex);
881 netlink_rcv_skb(skb, &inet_diag_rcv_msg);
882 mutex_unlock(&inet_diag_mutex);
883}
884
885int inet_diag_register(const struct inet_diag_handler *h)
886{
887 const __u16 type = h->idiag_type;
888 int err = -EINVAL;
889
890 if (type >= INET_DIAG_GETSOCK_MAX)
891 goto out;
892
893 mutex_lock(&inet_diag_table_mutex);
894 err = -EEXIST;
895 if (inet_diag_table[type] == NULL) {
896 inet_diag_table[type] = h;
897 err = 0;
898 }
899 mutex_unlock(&inet_diag_table_mutex);
900out:
901 return err;
902}
903EXPORT_SYMBOL_GPL(inet_diag_register);
904
905void inet_diag_unregister(const struct inet_diag_handler *h)
906{
907 const __u16 type = h->idiag_type;
908
909 if (type >= INET_DIAG_GETSOCK_MAX)
910 return;
911
912 mutex_lock(&inet_diag_table_mutex);
913 inet_diag_table[type] = NULL;
914 mutex_unlock(&inet_diag_table_mutex);
915}
916EXPORT_SYMBOL_GPL(inet_diag_unregister);
917
918static int __init inet_diag_init(void)
919{
920 const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
921 sizeof(struct inet_diag_handler *));
922 int err = -ENOMEM;
923
924 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
925 if (!inet_diag_table)
926 goto out;
927
928 idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0,
929 inet_diag_rcv, NULL, THIS_MODULE);
930 if (idiagnl == NULL)
931 goto out_free_table;
932 err = 0;
933out:
934 return err;
935out_free_table:
936 kfree(inet_diag_table);
937 goto out;
938}
939
940static void __exit inet_diag_exit(void)
941{
942 netlink_kernel_release(idiagnl);
943 kfree(inet_diag_table);
944}
945
946module_init(inet_diag_init);
947module_exit(inet_diag_exit);
948MODULE_LICENSE("GPL");
949MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG);
950
