2 * inet_diag.c Module for monitoring INET transport protocols sockets.
4 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
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/slab.h>
18 #include <linux/cache.h>
19 #include <linux/init.h>
20 #include <linux/time.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 #include <net/netlink.h>
32 #include <linux/inet.h>
33 #include <linux/stddef.h>
35 #include <linux/inet_diag.h>
37 static const struct inet_diag_handler
**inet_diag_table
;
39 struct inet_diag_entry
{
48 static struct sock
*idiagnl
;
50 #define INET_DIAG_PUT(skb, attrtype, attrlen) \
51 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
53 static DEFINE_MUTEX(inet_diag_table_mutex
);
55 static const struct inet_diag_handler
*inet_diag_lock_handler(int type
)
57 if (!inet_diag_table
[type
])
58 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK
,
59 NETLINK_INET_DIAG
, type
);
61 mutex_lock(&inet_diag_table_mutex
);
62 if (!inet_diag_table
[type
])
63 return ERR_PTR(-ENOENT
);
65 return inet_diag_table
[type
];
68 static inline void inet_diag_unlock_handler(
69 const struct inet_diag_handler
*handler
)
71 mutex_unlock(&inet_diag_table_mutex
);
74 static int inet_csk_diag_fill(struct sock
*sk
,
76 int ext
, u32 pid
, u32 seq
, u16 nlmsg_flags
,
77 const struct nlmsghdr
*unlh
)
79 const struct inet_sock
*inet
= inet_sk(sk
);
80 const struct inet_connection_sock
*icsk
= inet_csk(sk
);
81 struct inet_diag_msg
*r
;
84 struct inet_diag_meminfo
*minfo
= NULL
;
85 unsigned char *b
= skb_tail_pointer(skb
);
86 const struct inet_diag_handler
*handler
;
88 handler
= inet_diag_table
[unlh
->nlmsg_type
];
89 BUG_ON(handler
== NULL
);
91 nlh
= NLMSG_PUT(skb
, pid
, seq
, unlh
->nlmsg_type
, sizeof(*r
));
92 nlh
->nlmsg_flags
= nlmsg_flags
;
95 BUG_ON(sk
->sk_state
== TCP_TIME_WAIT
);
97 if (ext
& (1 << (INET_DIAG_MEMINFO
- 1)))
98 minfo
= INET_DIAG_PUT(skb
, INET_DIAG_MEMINFO
, sizeof(*minfo
));
100 if (ext
& (1 << (INET_DIAG_INFO
- 1)))
101 info
= INET_DIAG_PUT(skb
, INET_DIAG_INFO
,
102 handler
->idiag_info_size
);
104 if ((ext
& (1 << (INET_DIAG_CONG
- 1))) && icsk
->icsk_ca_ops
) {
105 const size_t len
= strlen(icsk
->icsk_ca_ops
->name
);
107 strcpy(INET_DIAG_PUT(skb
, INET_DIAG_CONG
, len
+ 1),
108 icsk
->icsk_ca_ops
->name
);
111 if ((ext
& (1 << (INET_DIAG_TOS
- 1))) && (sk
->sk_family
!= AF_INET6
))
112 RTA_PUT_U8(skb
, INET_DIAG_TOS
, inet
->tos
);
114 r
->idiag_family
= sk
->sk_family
;
115 r
->idiag_state
= sk
->sk_state
;
117 r
->idiag_retrans
= 0;
119 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
120 r
->id
.idiag_cookie
[0] = (u32
)(unsigned long)sk
;
121 r
->id
.idiag_cookie
[1] = (u32
)(((unsigned long)sk
>> 31) >> 1);
123 r
->id
.idiag_sport
= inet
->inet_sport
;
124 r
->id
.idiag_dport
= inet
->inet_dport
;
125 r
->id
.idiag_src
[0] = inet
->inet_rcv_saddr
;
126 r
->id
.idiag_dst
[0] = inet
->inet_daddr
;
128 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
129 if (r
->idiag_family
== AF_INET6
) {
130 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
132 *(struct in6_addr
*)r
->id
.idiag_src
= np
->rcv_saddr
;
133 *(struct in6_addr
*)r
->id
.idiag_dst
= np
->daddr
;
134 if (ext
& (1 << (INET_DIAG_TCLASS
- 1)))
135 RTA_PUT_U8(skb
, INET_DIAG_TCLASS
, np
->tclass
);
139 #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
141 if (icsk
->icsk_pending
== ICSK_TIME_RETRANS
) {
143 r
->idiag_retrans
= icsk
->icsk_retransmits
;
144 r
->idiag_expires
= EXPIRES_IN_MS(icsk
->icsk_timeout
);
145 } else if (icsk
->icsk_pending
== ICSK_TIME_PROBE0
) {
147 r
->idiag_retrans
= icsk
->icsk_probes_out
;
148 r
->idiag_expires
= EXPIRES_IN_MS(icsk
->icsk_timeout
);
149 } else if (timer_pending(&sk
->sk_timer
)) {
151 r
->idiag_retrans
= icsk
->icsk_probes_out
;
152 r
->idiag_expires
= EXPIRES_IN_MS(sk
->sk_timer
.expires
);
155 r
->idiag_expires
= 0;
159 r
->idiag_uid
= sock_i_uid(sk
);
160 r
->idiag_inode
= sock_i_ino(sk
);
163 minfo
->idiag_rmem
= sk_rmem_alloc_get(sk
);
164 minfo
->idiag_wmem
= sk
->sk_wmem_queued
;
165 minfo
->idiag_fmem
= sk
->sk_forward_alloc
;
166 minfo
->idiag_tmem
= sk_wmem_alloc_get(sk
);
169 handler
->idiag_get_info(sk
, r
, info
);
171 if (sk
->sk_state
< TCP_TIME_WAIT
&&
172 icsk
->icsk_ca_ops
&& icsk
->icsk_ca_ops
->get_info
)
173 icsk
->icsk_ca_ops
->get_info(sk
, ext
, skb
);
175 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
184 static int inet_twsk_diag_fill(struct inet_timewait_sock
*tw
,
185 struct sk_buff
*skb
, int ext
, u32 pid
,
186 u32 seq
, u16 nlmsg_flags
,
187 const struct nlmsghdr
*unlh
)
190 struct inet_diag_msg
*r
;
191 const unsigned char *previous_tail
= skb_tail_pointer(skb
);
192 struct nlmsghdr
*nlh
= NLMSG_PUT(skb
, pid
, seq
,
193 unlh
->nlmsg_type
, sizeof(*r
));
196 BUG_ON(tw
->tw_state
!= TCP_TIME_WAIT
);
198 nlh
->nlmsg_flags
= nlmsg_flags
;
200 tmo
= tw
->tw_ttd
- jiffies
;
204 r
->idiag_family
= tw
->tw_family
;
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
;
215 r
->idiag_expires
= DIV_ROUND_UP(tmo
* 1000, HZ
);
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
);
225 *(struct in6_addr
*)r
->id
.idiag_src
= tw6
->tw_v6_rcv_saddr
;
226 *(struct in6_addr
*)r
->id
.idiag_dst
= tw6
->tw_v6_daddr
;
229 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - previous_tail
;
232 nlmsg_trim(skb
, previous_tail
);
236 static int sk_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
237 int ext
, u32 pid
, u32 seq
, u16 nlmsg_flags
,
238 const struct nlmsghdr
*unlh
)
240 if (sk
->sk_state
== TCP_TIME_WAIT
)
241 return inet_twsk_diag_fill((struct inet_timewait_sock
*)sk
,
242 skb
, ext
, pid
, seq
, nlmsg_flags
,
244 return inet_csk_diag_fill(sk
, skb
, ext
, pid
, seq
, nlmsg_flags
, unlh
);
247 static int inet_diag_get_exact(struct sk_buff
*in_skb
,
248 const struct nlmsghdr
*nlh
)
252 struct inet_diag_req
*req
= NLMSG_DATA(nlh
);
254 struct inet_hashinfo
*hashinfo
;
255 const struct inet_diag_handler
*handler
;
257 handler
= inet_diag_lock_handler(nlh
->nlmsg_type
);
258 if (IS_ERR(handler
)) {
259 err
= PTR_ERR(handler
);
263 hashinfo
= handler
->idiag_hashinfo
;
266 if (req
->idiag_family
== AF_INET
) {
267 sk
= inet_lookup(&init_net
, hashinfo
, req
->id
.idiag_dst
[0],
268 req
->id
.idiag_dport
, req
->id
.idiag_src
[0],
269 req
->id
.idiag_sport
, req
->id
.idiag_if
);
271 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
272 else if (req
->idiag_family
== AF_INET6
) {
273 sk
= inet6_lookup(&init_net
, hashinfo
,
274 (struct in6_addr
*)req
->id
.idiag_dst
,
276 (struct in6_addr
*)req
->id
.idiag_src
,
290 if ((req
->id
.idiag_cookie
[0] != INET_DIAG_NOCOOKIE
||
291 req
->id
.idiag_cookie
[1] != INET_DIAG_NOCOOKIE
) &&
292 ((u32
)(unsigned long)sk
!= req
->id
.idiag_cookie
[0] ||
293 (u32
)((((unsigned long)sk
) >> 31) >> 1) != req
->id
.idiag_cookie
[1]))
297 rep
= alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg
) +
298 sizeof(struct inet_diag_meminfo
) +
299 handler
->idiag_info_size
+ 64)),
304 err
= sk_diag_fill(sk
, rep
, req
->idiag_ext
,
305 NETLINK_CB(in_skb
).pid
,
306 nlh
->nlmsg_seq
, 0, nlh
);
308 WARN_ON(err
== -EMSGSIZE
);
312 err
= netlink_unicast(idiagnl
, rep
, NETLINK_CB(in_skb
).pid
,
319 if (sk
->sk_state
== TCP_TIME_WAIT
)
320 inet_twsk_put((struct inet_timewait_sock
*)sk
);
325 inet_diag_unlock_handler(handler
);
329 static int bitstring_match(const __be32
*a1
, const __be32
*a2
, int bits
)
331 int words
= bits
>> 5;
336 if (memcmp(a1
, a2
, words
<< 2))
346 mask
= htonl((0xffffffff) << (32 - bits
));
348 if ((w1
^ w2
) & mask
)
356 static int inet_diag_bc_run(const void *bc
, int len
,
357 const struct inet_diag_entry
*entry
)
361 const struct inet_diag_bc_op
*op
= bc
;
364 case INET_DIAG_BC_NOP
:
366 case INET_DIAG_BC_JMP
:
369 case INET_DIAG_BC_S_GE
:
370 yes
= entry
->sport
>= op
[1].no
;
372 case INET_DIAG_BC_S_LE
:
373 yes
= entry
->sport
<= op
[1].no
;
375 case INET_DIAG_BC_D_GE
:
376 yes
= entry
->dport
>= op
[1].no
;
378 case INET_DIAG_BC_D_LE
:
379 yes
= entry
->dport
<= op
[1].no
;
381 case INET_DIAG_BC_AUTO
:
382 yes
= !(entry
->userlocks
& SOCK_BINDPORT_LOCK
);
384 case INET_DIAG_BC_S_COND
:
385 case INET_DIAG_BC_D_COND
: {
386 struct inet_diag_hostcond
*cond
;
389 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
390 if (cond
->port
!= -1 &&
391 cond
->port
!= (op
->code
== INET_DIAG_BC_S_COND
?
392 entry
->sport
: entry
->dport
)) {
397 if (cond
->prefix_len
== 0)
400 if (op
->code
== INET_DIAG_BC_S_COND
)
405 if (bitstring_match(addr
, cond
->addr
,
408 if (entry
->family
== AF_INET6
&&
409 cond
->family
== AF_INET
) {
410 if (addr
[0] == 0 && addr
[1] == 0 &&
411 addr
[2] == htonl(0xffff) &&
412 bitstring_match(addr
+ 3, cond
->addr
,
432 static int valid_cc(const void *bc
, int len
, int cc
)
435 const struct inet_diag_bc_op
*op
= bc
;
441 if (op
->yes
< 4 || op
->yes
& 3)
449 static int inet_diag_bc_audit(const void *bytecode
, int bytecode_len
)
451 const void *bc
= bytecode
;
452 int len
= bytecode_len
;
455 const struct inet_diag_bc_op
*op
= bc
;
457 //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
459 case INET_DIAG_BC_AUTO
:
460 case INET_DIAG_BC_S_COND
:
461 case INET_DIAG_BC_D_COND
:
462 case INET_DIAG_BC_S_GE
:
463 case INET_DIAG_BC_S_LE
:
464 case INET_DIAG_BC_D_GE
:
465 case INET_DIAG_BC_D_LE
:
466 case INET_DIAG_BC_JMP
:
467 if (op
->no
< 4 || op
->no
> len
+ 4 || op
->no
& 3)
470 !valid_cc(bytecode
, bytecode_len
, len
- op
->no
))
473 case INET_DIAG_BC_NOP
:
478 if (op
->yes
< 4 || op
->yes
> len
+ 4 || op
->yes
& 3)
483 return len
== 0 ? 0 : -EINVAL
;
486 static int inet_csk_diag_dump(struct sock
*sk
,
488 struct netlink_callback
*cb
)
490 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
492 if (nlmsg_attrlen(cb
->nlh
, sizeof(*r
))) {
493 struct inet_diag_entry entry
;
494 const struct nlattr
*bc
= nlmsg_find_attr(cb
->nlh
,
496 INET_DIAG_REQ_BYTECODE
);
497 struct inet_sock
*inet
= inet_sk(sk
);
499 entry
.family
= sk
->sk_family
;
500 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
501 if (entry
.family
== AF_INET6
) {
502 struct ipv6_pinfo
*np
= inet6_sk(sk
);
504 entry
.saddr
= np
->rcv_saddr
.s6_addr32
;
505 entry
.daddr
= np
->daddr
.s6_addr32
;
509 entry
.saddr
= &inet
->inet_rcv_saddr
;
510 entry
.daddr
= &inet
->inet_daddr
;
512 entry
.sport
= inet
->inet_num
;
513 entry
.dport
= ntohs(inet
->inet_dport
);
514 entry
.userlocks
= sk
->sk_userlocks
;
516 if (!inet_diag_bc_run(nla_data(bc
), nla_len(bc
), &entry
))
520 return inet_csk_diag_fill(sk
, skb
, r
->idiag_ext
,
521 NETLINK_CB(cb
->skb
).pid
,
522 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
525 static int inet_twsk_diag_dump(struct inet_timewait_sock
*tw
,
527 struct netlink_callback
*cb
)
529 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
531 if (nlmsg_attrlen(cb
->nlh
, sizeof(*r
))) {
532 struct inet_diag_entry entry
;
533 const struct nlattr
*bc
= nlmsg_find_attr(cb
->nlh
,
535 INET_DIAG_REQ_BYTECODE
);
537 entry
.family
= tw
->tw_family
;
538 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
539 if (tw
->tw_family
== AF_INET6
) {
540 struct inet6_timewait_sock
*tw6
=
541 inet6_twsk((struct sock
*)tw
);
542 entry
.saddr
= tw6
->tw_v6_rcv_saddr
.s6_addr32
;
543 entry
.daddr
= tw6
->tw_v6_daddr
.s6_addr32
;
547 entry
.saddr
= &tw
->tw_rcv_saddr
;
548 entry
.daddr
= &tw
->tw_daddr
;
550 entry
.sport
= tw
->tw_num
;
551 entry
.dport
= ntohs(tw
->tw_dport
);
554 if (!inet_diag_bc_run(nla_data(bc
), nla_len(bc
), &entry
))
558 return inet_twsk_diag_fill(tw
, skb
, r
->idiag_ext
,
559 NETLINK_CB(cb
->skb
).pid
,
560 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
563 static int inet_diag_fill_req(struct sk_buff
*skb
, struct sock
*sk
,
564 struct request_sock
*req
, u32 pid
, u32 seq
,
565 const struct nlmsghdr
*unlh
)
567 const struct inet_request_sock
*ireq
= inet_rsk(req
);
568 struct inet_sock
*inet
= inet_sk(sk
);
569 unsigned char *b
= skb_tail_pointer(skb
);
570 struct inet_diag_msg
*r
;
571 struct nlmsghdr
*nlh
;
574 nlh
= NLMSG_PUT(skb
, pid
, seq
, unlh
->nlmsg_type
, sizeof(*r
));
575 nlh
->nlmsg_flags
= NLM_F_MULTI
;
578 r
->idiag_family
= sk
->sk_family
;
579 r
->idiag_state
= TCP_SYN_RECV
;
581 r
->idiag_retrans
= req
->retrans
;
583 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
584 r
->id
.idiag_cookie
[0] = (u32
)(unsigned long)req
;
585 r
->id
.idiag_cookie
[1] = (u32
)(((unsigned long)req
>> 31) >> 1);
587 tmo
= req
->expires
- jiffies
;
591 r
->id
.idiag_sport
= inet
->inet_sport
;
592 r
->id
.idiag_dport
= ireq
->rmt_port
;
593 r
->id
.idiag_src
[0] = ireq
->loc_addr
;
594 r
->id
.idiag_dst
[0] = ireq
->rmt_addr
;
595 r
->idiag_expires
= jiffies_to_msecs(tmo
);
598 r
->idiag_uid
= sock_i_uid(sk
);
600 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
601 if (r
->idiag_family
== AF_INET6
) {
602 *(struct in6_addr
*)r
->id
.idiag_src
= inet6_rsk(req
)->loc_addr
;
603 *(struct in6_addr
*)r
->id
.idiag_dst
= inet6_rsk(req
)->rmt_addr
;
606 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
615 static int inet_diag_dump_reqs(struct sk_buff
*skb
, struct sock
*sk
,
616 struct netlink_callback
*cb
)
618 struct inet_diag_entry entry
;
619 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
620 struct inet_connection_sock
*icsk
= inet_csk(sk
);
621 struct listen_sock
*lopt
;
622 const struct nlattr
*bc
= NULL
;
623 struct inet_sock
*inet
= inet_sk(sk
);
625 int reqnum
, s_reqnum
;
629 s_reqnum
= cb
->args
[4];
634 entry
.family
= sk
->sk_family
;
636 read_lock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
638 lopt
= icsk
->icsk_accept_queue
.listen_opt
;
639 if (!lopt
|| !lopt
->qlen
)
642 if (nlmsg_attrlen(cb
->nlh
, sizeof(*r
))) {
643 bc
= nlmsg_find_attr(cb
->nlh
, sizeof(*r
),
644 INET_DIAG_REQ_BYTECODE
);
645 entry
.sport
= inet
->inet_num
;
646 entry
.userlocks
= sk
->sk_userlocks
;
649 for (j
= s_j
; j
< lopt
->nr_table_entries
; j
++) {
650 struct request_sock
*req
, *head
= lopt
->syn_table
[j
];
653 for (req
= head
; req
; reqnum
++, req
= req
->dl_next
) {
654 struct inet_request_sock
*ireq
= inet_rsk(req
);
656 if (reqnum
< s_reqnum
)
658 if (r
->id
.idiag_dport
!= ireq
->rmt_port
&&
664 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
665 (entry
.family
== AF_INET6
) ?
666 inet6_rsk(req
)->loc_addr
.s6_addr32
:
670 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
671 (entry
.family
== AF_INET6
) ?
672 inet6_rsk(req
)->rmt_addr
.s6_addr32
:
675 entry
.dport
= ntohs(ireq
->rmt_port
);
677 if (!inet_diag_bc_run(nla_data(bc
),
678 nla_len(bc
), &entry
))
682 err
= inet_diag_fill_req(skb
, sk
, req
,
683 NETLINK_CB(cb
->skb
).pid
,
684 cb
->nlh
->nlmsg_seq
, cb
->nlh
);
687 cb
->args
[4] = reqnum
;
696 read_unlock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
701 static int inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
705 struct inet_diag_req
*r
= NLMSG_DATA(cb
->nlh
);
706 const struct inet_diag_handler
*handler
;
707 struct inet_hashinfo
*hashinfo
;
709 handler
= inet_diag_lock_handler(cb
->nlh
->nlmsg_type
);
713 hashinfo
= handler
->idiag_hashinfo
;
716 s_num
= num
= cb
->args
[2];
718 if (cb
->args
[0] == 0) {
719 if (!(r
->idiag_states
& (TCPF_LISTEN
| TCPF_SYN_RECV
)))
722 for (i
= s_i
; i
< INET_LHTABLE_SIZE
; i
++) {
724 struct hlist_nulls_node
*node
;
725 struct inet_listen_hashbucket
*ilb
;
728 ilb
= &hashinfo
->listening_hash
[i
];
729 spin_lock_bh(&ilb
->lock
);
730 sk_nulls_for_each(sk
, node
, &ilb
->head
) {
731 struct inet_sock
*inet
= inet_sk(sk
);
738 if (r
->id
.idiag_sport
!= inet
->inet_sport
&&
742 if (!(r
->idiag_states
& TCPF_LISTEN
) ||
747 if (inet_csk_diag_dump(sk
, skb
, cb
) < 0) {
748 spin_unlock_bh(&ilb
->lock
);
753 if (!(r
->idiag_states
& TCPF_SYN_RECV
))
756 if (inet_diag_dump_reqs(skb
, sk
, cb
) < 0) {
757 spin_unlock_bh(&ilb
->lock
);
766 spin_unlock_bh(&ilb
->lock
);
774 s_i
= num
= s_num
= 0;
777 if (!(r
->idiag_states
& ~(TCPF_LISTEN
| TCPF_SYN_RECV
)))
780 for (i
= s_i
; i
<= hashinfo
->ehash_mask
; i
++) {
781 struct inet_ehash_bucket
*head
= &hashinfo
->ehash
[i
];
782 spinlock_t
*lock
= inet_ehash_lockp(hashinfo
, i
);
784 struct hlist_nulls_node
*node
;
788 if (hlist_nulls_empty(&head
->chain
) &&
789 hlist_nulls_empty(&head
->twchain
))
796 sk_nulls_for_each(sk
, node
, &head
->chain
) {
797 struct inet_sock
*inet
= inet_sk(sk
);
801 if (!(r
->idiag_states
& (1 << sk
->sk_state
)))
803 if (r
->id
.idiag_sport
!= inet
->inet_sport
&&
806 if (r
->id
.idiag_dport
!= inet
->inet_dport
&&
809 if (inet_csk_diag_dump(sk
, skb
, cb
) < 0) {
810 spin_unlock_bh(lock
);
817 if (r
->idiag_states
& TCPF_TIME_WAIT
) {
818 struct inet_timewait_sock
*tw
;
820 inet_twsk_for_each(tw
, node
,
825 if (r
->id
.idiag_sport
!= tw
->tw_sport
&&
828 if (r
->id
.idiag_dport
!= tw
->tw_dport
&&
831 if (inet_twsk_diag_dump(tw
, skb
, cb
) < 0) {
832 spin_unlock_bh(lock
);
839 spin_unlock_bh(lock
);
846 inet_diag_unlock_handler(handler
);
850 static int inet_diag_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
852 int hdrlen
= sizeof(struct inet_diag_req
);
854 if (nlh
->nlmsg_type
>= INET_DIAG_GETSOCK_MAX
||
855 nlmsg_len(nlh
) < hdrlen
)
858 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
859 if (nlmsg_attrlen(nlh
, hdrlen
)) {
862 attr
= nlmsg_find_attr(nlh
, hdrlen
,
863 INET_DIAG_REQ_BYTECODE
);
865 nla_len(attr
) < sizeof(struct inet_diag_bc_op
) ||
866 inet_diag_bc_audit(nla_data(attr
), nla_len(attr
)))
870 return netlink_dump_start(idiagnl
, skb
, nlh
,
871 inet_diag_dump
, NULL
, 0);
874 return inet_diag_get_exact(skb
, nlh
);
877 static DEFINE_MUTEX(inet_diag_mutex
);
879 static void inet_diag_rcv(struct sk_buff
*skb
)
881 mutex_lock(&inet_diag_mutex
);
882 netlink_rcv_skb(skb
, &inet_diag_rcv_msg
);
883 mutex_unlock(&inet_diag_mutex
);
886 int inet_diag_register(const struct inet_diag_handler
*h
)
888 const __u16 type
= h
->idiag_type
;
891 if (type
>= INET_DIAG_GETSOCK_MAX
)
894 mutex_lock(&inet_diag_table_mutex
);
896 if (inet_diag_table
[type
] == NULL
) {
897 inet_diag_table
[type
] = h
;
900 mutex_unlock(&inet_diag_table_mutex
);
904 EXPORT_SYMBOL_GPL(inet_diag_register
);
906 void inet_diag_unregister(const struct inet_diag_handler
*h
)
908 const __u16 type
= h
->idiag_type
;
910 if (type
>= INET_DIAG_GETSOCK_MAX
)
913 mutex_lock(&inet_diag_table_mutex
);
914 inet_diag_table
[type
] = NULL
;
915 mutex_unlock(&inet_diag_table_mutex
);
917 EXPORT_SYMBOL_GPL(inet_diag_unregister
);
919 static int __init
inet_diag_init(void)
921 const int inet_diag_table_size
= (INET_DIAG_GETSOCK_MAX
*
922 sizeof(struct inet_diag_handler
*));
925 inet_diag_table
= kzalloc(inet_diag_table_size
, GFP_KERNEL
);
926 if (!inet_diag_table
)
929 idiagnl
= netlink_kernel_create(&init_net
, NETLINK_INET_DIAG
, 0,
930 inet_diag_rcv
, NULL
, THIS_MODULE
);
937 kfree(inet_diag_table
);
941 static void __exit
inet_diag_exit(void)
943 netlink_kernel_release(idiagnl
);
944 kfree(inet_diag_table
);
947 module_init(inet_diag_init
);
948 module_exit(inet_diag_exit
);
949 MODULE_LICENSE("GPL");
950 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_INET_DIAG
);
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