2 * inet_diag.c Module for monitoring INET transport protocols sockets.
4 * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
6 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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.
14 #include <linux/kernel.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>
26 #include <net/inet_common.h>
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>
31 #include <net/netlink.h>
33 #include <linux/inet.h>
34 #include <linux/stddef.h>
36 #include <linux/inet_diag.h>
38 static const struct inet_diag_handler
**inet_diag_table
;
40 struct inet_diag_entry
{
49 static struct sock
*idiagnl
;
51 #define INET_DIAG_PUT(skb, attrtype, attrlen) \
52 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
54 static int inet_csk_diag_fill(struct sock
*sk
,
56 int ext
, u32 pid
, u32 seq
, u16 nlmsg_flags
,
57 const struct nlmsghdr
*unlh
)
59 const struct inet_sock
*inet
= inet_sk(sk
);
60 const struct inet_connection_sock
*icsk
= inet_csk(sk
);
61 struct inet_diag_msg
*r
;
64 struct inet_diag_meminfo
*minfo
= NULL
;
65 unsigned char *b
= skb_tail_pointer(skb
);
66 const struct inet_diag_handler
*handler
;
68 handler
= inet_diag_table
[unlh
->nlmsg_type
];
69 BUG_ON(handler
== NULL
);
71 nlh
= NLMSG_PUT(skb
, pid
, seq
, unlh
->nlmsg_type
, sizeof(*r
));
72 nlh
->nlmsg_flags
= nlmsg_flags
;
75 BUG_ON(sk
->sk_state
== TCP_TIME_WAIT
);
77 if (ext
& (1 << (INET_DIAG_MEMINFO
- 1)))
78 minfo
= INET_DIAG_PUT(skb
, INET_DIAG_MEMINFO
, sizeof(*minfo
));
80 if (ext
& (1 << (INET_DIAG_INFO
- 1)))
81 info
= INET_DIAG_PUT(skb
, INET_DIAG_INFO
,
82 handler
->idiag_info_size
);
84 if ((ext
& (1 << (INET_DIAG_CONG
- 1))) && icsk
->icsk_ca_ops
) {
85 const size_t len
= strlen(icsk
->icsk_ca_ops
->name
);
87 strcpy(INET_DIAG_PUT(skb
, INET_DIAG_CONG
, len
+ 1),
88 icsk
->icsk_ca_ops
->name
);
91 r
->idiag_family
= sk
->sk_family
;
92 r
->idiag_state
= sk
->sk_state
;
96 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
97 r
->id
.idiag_cookie
[0] = (u32
)(unsigned long)sk
;
98 r
->id
.idiag_cookie
[1] = (u32
)(((unsigned long)sk
>> 31) >> 1);
100 r
->id
.idiag_sport
= inet
->sport
;
101 r
->id
.idiag_dport
= inet
->dport
;
102 r
->id
.idiag_src
[0] = inet
->rcv_saddr
;
103 r
->id
.idiag_dst
[0] = inet
->daddr
;
105 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
106 if (r
->idiag_family
== AF_INET6
) {
107 struct ipv6_pinfo
*np
= inet6_sk(sk
);
109 ipv6_addr_copy((struct in6_addr
*)r
->id
.idiag_src
,
111 ipv6_addr_copy((struct in6_addr
*)r
->id
.idiag_dst
,
116 #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
118 if (icsk
->icsk_pending
== ICSK_TIME_RETRANS
) {
120 r
->idiag_retrans
= icsk
->icsk_retransmits
;
121 r
->idiag_expires
= EXPIRES_IN_MS(icsk
->icsk_timeout
);
122 } else if (icsk
->icsk_pending
== ICSK_TIME_PROBE0
) {
124 r
->idiag_retrans
= icsk
->icsk_probes_out
;
125 r
->idiag_expires
= EXPIRES_IN_MS(icsk
->icsk_timeout
);
126 } else if (timer_pending(&sk
->sk_timer
)) {
128 r
->idiag_retrans
= icsk
->icsk_probes_out
;
129 r
->idiag_expires
= EXPIRES_IN_MS(sk
->sk_timer
.expires
);
132 r
->idiag_expires
= 0;
136 r
->idiag_uid
= sock_i_uid(sk
);
137 r
->idiag_inode
= sock_i_ino(sk
);
140 minfo
->idiag_rmem
= atomic_read(&sk
->sk_rmem_alloc
);
141 minfo
->idiag_wmem
= sk
->sk_wmem_queued
;
142 minfo
->idiag_fmem
= sk
->sk_forward_alloc
;
143 minfo
->idiag_tmem
= atomic_read(&sk
->sk_wmem_alloc
);
146 handler
->idiag_get_info(sk
, r
, info
);
148 if (sk
->sk_state
< TCP_TIME_WAIT
&&
149 icsk
->icsk_ca_ops
&& icsk
->icsk_ca_ops
->get_info
)
150 icsk
->icsk_ca_ops
->get_info(sk
, ext
, skb
);
152 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
161 static int inet_twsk_diag_fill(struct inet_timewait_sock
*tw
,
162 struct sk_buff
*skb
, int ext
, u32 pid
,
163 u32 seq
, u16 nlmsg_flags
,
164 const struct nlmsghdr
*unlh
)
167 struct inet_diag_msg
*r
;
168 const unsigned char *previous_tail
= skb_tail_pointer(skb
);
169 struct nlmsghdr
*nlh
= NLMSG_PUT(skb
, pid
, seq
,
170 unlh
->nlmsg_type
, sizeof(*r
));
173 BUG_ON(tw
->tw_state
!= TCP_TIME_WAIT
);
175 nlh
->nlmsg_flags
= nlmsg_flags
;
177 tmo
= tw
->tw_ttd
- jiffies
;
181 r
->idiag_family
= tw
->tw_family
;
182 r
->idiag_state
= tw
->tw_state
;
184 r
->idiag_retrans
= 0;
185 r
->id
.idiag_if
= tw
->tw_bound_dev_if
;
186 r
->id
.idiag_cookie
[0] = (u32
)(unsigned long)tw
;
187 r
->id
.idiag_cookie
[1] = (u32
)(((unsigned long)tw
>> 31) >> 1);
188 r
->id
.idiag_sport
= tw
->tw_sport
;
189 r
->id
.idiag_dport
= tw
->tw_dport
;
190 r
->id
.idiag_src
[0] = tw
->tw_rcv_saddr
;
191 r
->id
.idiag_dst
[0] = tw
->tw_daddr
;
192 r
->idiag_state
= tw
->tw_substate
;
194 r
->idiag_expires
= DIV_ROUND_UP(tmo
* 1000, HZ
);
199 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
200 if (tw
->tw_family
== AF_INET6
) {
201 const struct inet6_timewait_sock
*tw6
=
202 inet6_twsk((struct sock
*)tw
);
204 ipv6_addr_copy((struct in6_addr
*)r
->id
.idiag_src
,
205 &tw6
->tw_v6_rcv_saddr
);
206 ipv6_addr_copy((struct in6_addr
*)r
->id
.idiag_dst
,
210 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - previous_tail
;
213 nlmsg_trim(skb
, previous_tail
);
217 static int sk_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
218 int ext
, u32 pid
, u32 seq
, u16 nlmsg_flags
,
219 const struct nlmsghdr
*unlh
)
221 if (sk
->sk_state
== TCP_TIME_WAIT
)
222 return inet_twsk_diag_fill((struct inet_timewait_sock
*)sk
,
223 skb
, ext
, pid
, seq
, nlmsg_flags
,
225 return inet_csk_diag_fill(sk
, skb
, ext
, pid
, seq
, nlmsg_flags
, unlh
);
228 static int inet_diag_get_exact(struct sk_buff
*in_skb
,
229 const struct nlmsghdr
*nlh
)
233 struct inet_diag_req
*req
= NLMSG_DATA(nlh
);
235 struct inet_hashinfo
*hashinfo
;
236 const struct inet_diag_handler
*handler
;
238 handler
= inet_diag_table
[nlh
->nlmsg_type
];
239 BUG_ON(handler
== NULL
);
240 hashinfo
= handler
->idiag_hashinfo
;
242 if (req
->idiag_family
== AF_INET
) {
243 sk
= inet_lookup(hashinfo
, req
->id
.idiag_dst
[0],
244 req
->id
.idiag_dport
, req
->id
.idiag_src
[0],
245 req
->id
.idiag_sport
, req
->id
.idiag_if
);
247 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
248 else if (req
->idiag_family
== AF_INET6
) {
249 sk
= inet6_lookup(hashinfo
,
250 (struct in6_addr
*)req
->id
.idiag_dst
,
252 (struct in6_addr
*)req
->id
.idiag_src
,
265 if ((req
->id
.idiag_cookie
[0] != INET_DIAG_NOCOOKIE
||
266 req
->id
.idiag_cookie
[1] != INET_DIAG_NOCOOKIE
) &&
267 ((u32
)(unsigned long)sk
!= req
->id
.idiag_cookie
[0] ||
268 (u32
)((((unsigned long)sk
) >> 31) >> 1) != req
->id
.idiag_cookie
[1]))
272 rep
= alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg
) +
273 sizeof(struct inet_diag_meminfo
) +
274 handler
->idiag_info_size
+ 64)),
279 err
= sk_diag_fill(sk
, rep
, req
->idiag_ext
,
280 NETLINK_CB(in_skb
).pid
,
281 nlh
->nlmsg_seq
, 0, nlh
);
283 WARN_ON(err
== -EMSGSIZE
);
287 err
= netlink_unicast(idiagnl
, rep
, NETLINK_CB(in_skb
).pid
,
294 if (sk
->sk_state
== TCP_TIME_WAIT
)
295 inet_twsk_put((struct inet_timewait_sock
*)sk
);
302 static int bitstring_match(const __be32
*a1
, const __be32
*a2
, int bits
)
304 int words
= bits
>> 5;
309 if (memcmp(a1
, a2
, words
<< 2))
319 mask
= htonl((0xffffffff) << (32 - bits
));
321 if ((w1
^ w2
) & mask
)
329 static int inet_diag_bc_run(const void *bc
, int len
,
330 const struct inet_diag_entry
*entry
)
334 const struct inet_diag_bc_op
*op
= bc
;
337 case INET_DIAG_BC_NOP
:
339 case INET_DIAG_BC_JMP
:
342 case INET_DIAG_BC_S_GE
:
343 yes
= entry
->sport
>= op
[1].no
;
345 case INET_DIAG_BC_S_LE
:
346 yes
= entry
->dport
<= op
[1].no
;
348 case INET_DIAG_BC_D_GE
:
349 yes
= entry
->dport
>= op
[1].no
;
351 case INET_DIAG_BC_D_LE
:
352 yes
= entry
->dport
<= op
[1].no
;
354 case INET_DIAG_BC_AUTO
:
355 yes
= !(entry
->userlocks
& SOCK_BINDPORT_LOCK
);
357 case INET_DIAG_BC_S_COND
:
358 case INET_DIAG_BC_D_COND
: {
359 struct inet_diag_hostcond
*cond
;
362 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
363 if (cond
->port
!= -1 &&
364 cond
->port
!= (op
->code
== INET_DIAG_BC_S_COND
?
365 entry
->sport
: entry
->dport
)) {
370 if (cond
->prefix_len
== 0)
373 if (op
->code
== INET_DIAG_BC_S_COND
)
378 if (bitstring_match(addr
, cond
->addr
,
381 if (entry
->family
== AF_INET6
&&
382 cond
->family
== AF_INET
) {
383 if (addr
[0] == 0 && addr
[1] == 0 &&
384 addr
[2] == htonl(0xffff) &&
385 bitstring_match(addr
+ 3, cond
->addr
,
405 static int valid_cc(const void *bc
, int len
, int cc
)
408 const struct inet_diag_bc_op
*op
= bc
;
422 static int inet_diag_bc_audit(const void *bytecode
, int bytecode_len
)
424 const unsigned char *bc
= bytecode
;
425 int len
= bytecode_len
;
428 struct inet_diag_bc_op
*op
= (struct inet_diag_bc_op
*)bc
;
430 //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
432 case INET_DIAG_BC_AUTO
:
433 case INET_DIAG_BC_S_COND
:
434 case INET_DIAG_BC_D_COND
:
435 case INET_DIAG_BC_S_GE
:
436 case INET_DIAG_BC_S_LE
:
437 case INET_DIAG_BC_D_GE
:
438 case INET_DIAG_BC_D_LE
:
439 if (op
->yes
< 4 || op
->yes
> len
+ 4)
441 case INET_DIAG_BC_JMP
:
442 if (op
->no
< 4 || op
->no
> len
+ 4)
445 !valid_cc(bytecode
, bytecode_len
, len
- op
->no
))
448 case INET_DIAG_BC_NOP
:
449 if (op
->yes
< 4 || op
->yes
> len
+ 4)
458 return len
== 0 ? 0 : -EINVAL
;
461 static int inet_csk_diag_dump(struct sock
*sk
,
463 struct netlink_callback
*cb
)
465 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
467 if (cb
->nlh
->nlmsg_len
> 4 + NLMSG_SPACE(sizeof(*r
))) {
468 struct inet_diag_entry entry
;
469 struct rtattr
*bc
= (struct rtattr
*)(r
+ 1);
470 struct inet_sock
*inet
= inet_sk(sk
);
472 entry
.family
= sk
->sk_family
;
473 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
474 if (entry
.family
== AF_INET6
) {
475 struct ipv6_pinfo
*np
= inet6_sk(sk
);
477 entry
.saddr
= np
->rcv_saddr
.s6_addr32
;
478 entry
.daddr
= np
->daddr
.s6_addr32
;
482 entry
.saddr
= &inet
->rcv_saddr
;
483 entry
.daddr
= &inet
->daddr
;
485 entry
.sport
= inet
->num
;
486 entry
.dport
= ntohs(inet
->dport
);
487 entry
.userlocks
= sk
->sk_userlocks
;
489 if (!inet_diag_bc_run(RTA_DATA(bc
), RTA_PAYLOAD(bc
), &entry
))
493 return inet_csk_diag_fill(sk
, skb
, r
->idiag_ext
,
494 NETLINK_CB(cb
->skb
).pid
,
495 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
498 static int inet_twsk_diag_dump(struct inet_timewait_sock
*tw
,
500 struct netlink_callback
*cb
)
502 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
504 if (cb
->nlh
->nlmsg_len
> 4 + NLMSG_SPACE(sizeof(*r
))) {
505 struct inet_diag_entry entry
;
506 struct rtattr
*bc
= (struct rtattr
*)(r
+ 1);
508 entry
.family
= tw
->tw_family
;
509 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
510 if (tw
->tw_family
== AF_INET6
) {
511 struct inet6_timewait_sock
*tw6
=
512 inet6_twsk((struct sock
*)tw
);
513 entry
.saddr
= tw6
->tw_v6_rcv_saddr
.s6_addr32
;
514 entry
.daddr
= tw6
->tw_v6_daddr
.s6_addr32
;
518 entry
.saddr
= &tw
->tw_rcv_saddr
;
519 entry
.daddr
= &tw
->tw_daddr
;
521 entry
.sport
= tw
->tw_num
;
522 entry
.dport
= ntohs(tw
->tw_dport
);
525 if (!inet_diag_bc_run(RTA_DATA(bc
), RTA_PAYLOAD(bc
), &entry
))
529 return inet_twsk_diag_fill(tw
, skb
, r
->idiag_ext
,
530 NETLINK_CB(cb
->skb
).pid
,
531 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
534 static int inet_diag_fill_req(struct sk_buff
*skb
, struct sock
*sk
,
535 struct request_sock
*req
, u32 pid
, u32 seq
,
536 const struct nlmsghdr
*unlh
)
538 const struct inet_request_sock
*ireq
= inet_rsk(req
);
539 struct inet_sock
*inet
= inet_sk(sk
);
540 unsigned char *b
= skb_tail_pointer(skb
);
541 struct inet_diag_msg
*r
;
542 struct nlmsghdr
*nlh
;
545 nlh
= NLMSG_PUT(skb
, pid
, seq
, unlh
->nlmsg_type
, sizeof(*r
));
546 nlh
->nlmsg_flags
= NLM_F_MULTI
;
549 r
->idiag_family
= sk
->sk_family
;
550 r
->idiag_state
= TCP_SYN_RECV
;
552 r
->idiag_retrans
= req
->retrans
;
554 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
555 r
->id
.idiag_cookie
[0] = (u32
)(unsigned long)req
;
556 r
->id
.idiag_cookie
[1] = (u32
)(((unsigned long)req
>> 31) >> 1);
558 tmo
= req
->expires
- jiffies
;
562 r
->id
.idiag_sport
= inet
->sport
;
563 r
->id
.idiag_dport
= ireq
->rmt_port
;
564 r
->id
.idiag_src
[0] = ireq
->loc_addr
;
565 r
->id
.idiag_dst
[0] = ireq
->rmt_addr
;
566 r
->idiag_expires
= jiffies_to_msecs(tmo
);
569 r
->idiag_uid
= sock_i_uid(sk
);
571 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
572 if (r
->idiag_family
== AF_INET6
) {
573 ipv6_addr_copy((struct in6_addr
*)r
->id
.idiag_src
,
574 &inet6_rsk(req
)->loc_addr
);
575 ipv6_addr_copy((struct in6_addr
*)r
->id
.idiag_dst
,
576 &inet6_rsk(req
)->rmt_addr
);
579 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
588 static int inet_diag_dump_reqs(struct sk_buff
*skb
, struct sock
*sk
,
589 struct netlink_callback
*cb
)
591 struct inet_diag_entry entry
;
592 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
593 struct inet_connection_sock
*icsk
= inet_csk(sk
);
594 struct listen_sock
*lopt
;
595 struct rtattr
*bc
= NULL
;
596 struct inet_sock
*inet
= inet_sk(sk
);
598 int reqnum
, s_reqnum
;
602 s_reqnum
= cb
->args
[4];
607 entry
.family
= sk
->sk_family
;
609 read_lock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
611 lopt
= icsk
->icsk_accept_queue
.listen_opt
;
612 if (!lopt
|| !lopt
->qlen
)
615 if (cb
->nlh
->nlmsg_len
> 4 + NLMSG_SPACE(sizeof(*r
))) {
616 bc
= (struct rtattr
*)(r
+ 1);
617 entry
.sport
= inet
->num
;
618 entry
.userlocks
= sk
->sk_userlocks
;
621 for (j
= s_j
; j
< lopt
->nr_table_entries
; j
++) {
622 struct request_sock
*req
, *head
= lopt
->syn_table
[j
];
625 for (req
= head
; req
; reqnum
++, req
= req
->dl_next
) {
626 struct inet_request_sock
*ireq
= inet_rsk(req
);
628 if (reqnum
< s_reqnum
)
630 if (r
->id
.idiag_dport
!= ireq
->rmt_port
&&
636 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
637 (entry
.family
== AF_INET6
) ?
638 inet6_rsk(req
)->loc_addr
.s6_addr32
:
642 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
643 (entry
.family
== AF_INET6
) ?
644 inet6_rsk(req
)->rmt_addr
.s6_addr32
:
647 entry
.dport
= ntohs(ireq
->rmt_port
);
649 if (!inet_diag_bc_run(RTA_DATA(bc
),
650 RTA_PAYLOAD(bc
), &entry
))
654 err
= inet_diag_fill_req(skb
, sk
, req
,
655 NETLINK_CB(cb
->skb
).pid
,
656 cb
->nlh
->nlmsg_seq
, cb
->nlh
);
659 cb
->args
[4] = reqnum
;
668 read_unlock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
673 static int inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
677 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
678 const struct inet_diag_handler
*handler
;
679 struct inet_hashinfo
*hashinfo
;
681 handler
= inet_diag_table
[cb
->nlh
->nlmsg_type
];
682 BUG_ON(handler
== NULL
);
683 hashinfo
= handler
->idiag_hashinfo
;
686 s_num
= num
= cb
->args
[2];
688 if (cb
->args
[0] == 0) {
689 if (!(r
->idiag_states
& (TCPF_LISTEN
| TCPF_SYN_RECV
)))
692 inet_listen_lock(hashinfo
);
693 for (i
= s_i
; i
< INET_LHTABLE_SIZE
; i
++) {
695 struct hlist_node
*node
;
698 sk_for_each(sk
, node
, &hashinfo
->listening_hash
[i
]) {
699 struct inet_sock
*inet
= inet_sk(sk
);
706 if (r
->id
.idiag_sport
!= inet
->sport
&&
710 if (!(r
->idiag_states
& TCPF_LISTEN
) ||
715 if (inet_csk_diag_dump(sk
, skb
, cb
) < 0) {
716 inet_listen_unlock(hashinfo
);
721 if (!(r
->idiag_states
& TCPF_SYN_RECV
))
724 if (inet_diag_dump_reqs(skb
, sk
, cb
) < 0) {
725 inet_listen_unlock(hashinfo
);
739 inet_listen_unlock(hashinfo
);
742 s_i
= num
= s_num
= 0;
745 if (!(r
->idiag_states
& ~(TCPF_LISTEN
| TCPF_SYN_RECV
)))
748 for (i
= s_i
; i
< hashinfo
->ehash_size
; i
++) {
749 struct inet_ehash_bucket
*head
= &hashinfo
->ehash
[i
];
750 rwlock_t
*lock
= inet_ehash_lockp(hashinfo
, i
);
752 struct hlist_node
*node
;
759 sk_for_each(sk
, node
, &head
->chain
) {
760 struct inet_sock
*inet
= inet_sk(sk
);
764 if (!(r
->idiag_states
& (1 << sk
->sk_state
)))
766 if (r
->id
.idiag_sport
!= inet
->sport
&&
769 if (r
->id
.idiag_dport
!= inet
->dport
&&
772 if (inet_csk_diag_dump(sk
, skb
, cb
) < 0) {
773 read_unlock_bh(lock
);
780 if (r
->idiag_states
& TCPF_TIME_WAIT
) {
781 struct inet_timewait_sock
*tw
;
783 inet_twsk_for_each(tw
, node
,
788 if (r
->id
.idiag_sport
!= tw
->tw_sport
&&
791 if (r
->id
.idiag_dport
!= tw
->tw_dport
&&
794 if (inet_twsk_diag_dump(tw
, skb
, cb
) < 0) {
795 read_unlock_bh(lock
);
802 read_unlock_bh(lock
);
811 static int inet_diag_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
813 int hdrlen
= sizeof(struct inet_diag_req
);
815 if (nlh
->nlmsg_type
>= INET_DIAG_GETSOCK_MAX
||
816 nlmsg_len(nlh
) < hdrlen
)
820 if (inet_diag_table
[nlh
->nlmsg_type
] == NULL
)
821 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK
,
822 NETLINK_INET_DIAG
, nlh
->nlmsg_type
);
825 if (inet_diag_table
[nlh
->nlmsg_type
] == NULL
)
828 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
829 if (nlmsg_attrlen(nlh
, hdrlen
)) {
832 attr
= nlmsg_find_attr(nlh
, hdrlen
,
833 INET_DIAG_REQ_BYTECODE
);
835 nla_len(attr
) < sizeof(struct inet_diag_bc_op
) ||
836 inet_diag_bc_audit(nla_data(attr
), nla_len(attr
)))
840 return netlink_dump_start(idiagnl
, skb
, nlh
,
841 inet_diag_dump
, NULL
);
844 return inet_diag_get_exact(skb
, nlh
);
847 static DEFINE_MUTEX(inet_diag_mutex
);
849 static void inet_diag_rcv(struct sk_buff
*skb
)
851 mutex_lock(&inet_diag_mutex
);
852 netlink_rcv_skb(skb
, &inet_diag_rcv_msg
);
853 mutex_unlock(&inet_diag_mutex
);
856 static DEFINE_SPINLOCK(inet_diag_register_lock
);
858 int inet_diag_register(const struct inet_diag_handler
*h
)
860 const __u16 type
= h
->idiag_type
;
863 if (type
>= INET_DIAG_GETSOCK_MAX
)
866 spin_lock(&inet_diag_register_lock
);
868 if (inet_diag_table
[type
] == NULL
) {
869 inet_diag_table
[type
] = h
;
872 spin_unlock(&inet_diag_register_lock
);
876 EXPORT_SYMBOL_GPL(inet_diag_register
);
878 void inet_diag_unregister(const struct inet_diag_handler
*h
)
880 const __u16 type
= h
->idiag_type
;
882 if (type
>= INET_DIAG_GETSOCK_MAX
)
885 spin_lock(&inet_diag_register_lock
);
886 inet_diag_table
[type
] = NULL
;
887 spin_unlock(&inet_diag_register_lock
);
891 EXPORT_SYMBOL_GPL(inet_diag_unregister
);
893 static int __init
inet_diag_init(void)
895 const int inet_diag_table_size
= (INET_DIAG_GETSOCK_MAX
*
896 sizeof(struct inet_diag_handler
*));
899 inet_diag_table
= kzalloc(inet_diag_table_size
, GFP_KERNEL
);
900 if (!inet_diag_table
)
903 idiagnl
= netlink_kernel_create(&init_net
, NETLINK_INET_DIAG
, 0,
904 inet_diag_rcv
, NULL
, THIS_MODULE
);
911 kfree(inet_diag_table
);
915 static void __exit
inet_diag_exit(void)
917 sock_release(idiagnl
->sk_socket
);
918 kfree(inet_diag_table
);
921 module_init(inet_diag_init
);
922 module_exit(inet_diag_exit
);
923 MODULE_LICENSE("GPL");
924 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_INET_DIAG
);