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>
36 #include <linux/sock_diag.h>
38 static const struct inet_diag_handler
**inet_diag_table
;
40 struct inet_diag_entry
{
47 #if IS_ENABLED(CONFIG_IPV6)
48 struct in6_addr saddr_storage
; /* for IPv4-mapped-IPv6 addresses */
49 struct in6_addr daddr_storage
; /* for IPv4-mapped-IPv6 addresses */
53 static DEFINE_MUTEX(inet_diag_table_mutex
);
55 static const struct inet_diag_handler
*inet_diag_lock_handler(int proto
)
57 if (!inet_diag_table
[proto
])
58 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK
,
59 NETLINK_SOCK_DIAG
, AF_INET
, proto
);
61 mutex_lock(&inet_diag_table_mutex
);
62 if (!inet_diag_table
[proto
])
63 return ERR_PTR(-ENOENT
);
65 return inet_diag_table
[proto
];
68 static inline void inet_diag_unlock_handler(
69 const struct inet_diag_handler
*handler
)
71 mutex_unlock(&inet_diag_table_mutex
);
74 int inet_sk_diag_fill(struct sock
*sk
, struct inet_connection_sock
*icsk
,
75 struct sk_buff
*skb
, struct inet_diag_req_v2
*req
,
76 struct user_namespace
*user_ns
,
77 u32 portid
, u32 seq
, u16 nlmsg_flags
,
78 const struct nlmsghdr
*unlh
)
80 const struct inet_sock
*inet
= inet_sk(sk
);
81 struct inet_diag_msg
*r
;
85 const struct inet_diag_handler
*handler
;
86 int ext
= req
->idiag_ext
;
88 handler
= inet_diag_table
[req
->sdiag_protocol
];
89 BUG_ON(handler
== NULL
);
91 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
97 BUG_ON(sk
->sk_state
== TCP_TIME_WAIT
);
99 r
->idiag_family
= sk
->sk_family
;
100 r
->idiag_state
= sk
->sk_state
;
102 r
->idiag_retrans
= 0;
104 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
105 sock_diag_save_cookie(sk
, r
->id
.idiag_cookie
);
107 r
->id
.idiag_sport
= inet
->inet_sport
;
108 r
->id
.idiag_dport
= inet
->inet_dport
;
110 memset(&r
->id
.idiag_src
, 0, sizeof(r
->id
.idiag_src
));
111 memset(&r
->id
.idiag_dst
, 0, sizeof(r
->id
.idiag_dst
));
113 r
->id
.idiag_src
[0] = inet
->inet_rcv_saddr
;
114 r
->id
.idiag_dst
[0] = inet
->inet_daddr
;
116 if (nla_put_u8(skb
, INET_DIAG_SHUTDOWN
, sk
->sk_shutdown
))
119 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
120 * hence this needs to be included regardless of socket family.
122 if (ext
& (1 << (INET_DIAG_TOS
- 1)))
123 if (nla_put_u8(skb
, INET_DIAG_TOS
, inet
->tos
) < 0)
126 #if IS_ENABLED(CONFIG_IPV6)
127 if (r
->idiag_family
== AF_INET6
) {
129 *(struct in6_addr
*)r
->id
.idiag_src
= sk
->sk_v6_rcv_saddr
;
130 *(struct in6_addr
*)r
->id
.idiag_dst
= sk
->sk_v6_daddr
;
132 if (ext
& (1 << (INET_DIAG_TCLASS
- 1)))
133 if (nla_put_u8(skb
, INET_DIAG_TCLASS
,
134 inet6_sk(sk
)->tclass
) < 0)
139 r
->idiag_uid
= from_kuid_munged(user_ns
, sock_i_uid(sk
));
140 r
->idiag_inode
= sock_i_ino(sk
);
142 if (ext
& (1 << (INET_DIAG_MEMINFO
- 1))) {
143 struct inet_diag_meminfo minfo
= {
144 .idiag_rmem
= sk_rmem_alloc_get(sk
),
145 .idiag_wmem
= sk
->sk_wmem_queued
,
146 .idiag_fmem
= sk
->sk_forward_alloc
,
147 .idiag_tmem
= sk_wmem_alloc_get(sk
),
150 if (nla_put(skb
, INET_DIAG_MEMINFO
, sizeof(minfo
), &minfo
) < 0)
154 if (ext
& (1 << (INET_DIAG_SKMEMINFO
- 1)))
155 if (sock_diag_put_meminfo(sk
, skb
, INET_DIAG_SKMEMINFO
))
159 handler
->idiag_get_info(sk
, r
, NULL
);
163 #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
165 if (icsk
->icsk_pending
== ICSK_TIME_RETRANS
||
166 icsk
->icsk_pending
== ICSK_TIME_EARLY_RETRANS
||
167 icsk
->icsk_pending
== ICSK_TIME_LOSS_PROBE
) {
169 r
->idiag_retrans
= icsk
->icsk_retransmits
;
170 r
->idiag_expires
= EXPIRES_IN_MS(icsk
->icsk_timeout
);
171 } else if (icsk
->icsk_pending
== ICSK_TIME_PROBE0
) {
173 r
->idiag_retrans
= icsk
->icsk_probes_out
;
174 r
->idiag_expires
= EXPIRES_IN_MS(icsk
->icsk_timeout
);
175 } else if (timer_pending(&sk
->sk_timer
)) {
177 r
->idiag_retrans
= icsk
->icsk_probes_out
;
178 r
->idiag_expires
= EXPIRES_IN_MS(sk
->sk_timer
.expires
);
181 r
->idiag_expires
= 0;
185 if (ext
& (1 << (INET_DIAG_INFO
- 1))) {
186 attr
= nla_reserve(skb
, INET_DIAG_INFO
,
187 sizeof(struct tcp_info
));
191 info
= nla_data(attr
);
194 if ((ext
& (1 << (INET_DIAG_CONG
- 1))) && icsk
->icsk_ca_ops
)
195 if (nla_put_string(skb
, INET_DIAG_CONG
,
196 icsk
->icsk_ca_ops
->name
) < 0)
199 handler
->idiag_get_info(sk
, r
, info
);
201 if (sk
->sk_state
< TCP_TIME_WAIT
&&
202 icsk
->icsk_ca_ops
&& icsk
->icsk_ca_ops
->get_info
)
203 icsk
->icsk_ca_ops
->get_info(sk
, ext
, skb
);
206 return nlmsg_end(skb
, nlh
);
209 nlmsg_cancel(skb
, nlh
);
212 EXPORT_SYMBOL_GPL(inet_sk_diag_fill
);
214 static int inet_csk_diag_fill(struct sock
*sk
,
215 struct sk_buff
*skb
, struct inet_diag_req_v2
*req
,
216 struct user_namespace
*user_ns
,
217 u32 portid
, u32 seq
, u16 nlmsg_flags
,
218 const struct nlmsghdr
*unlh
)
220 return inet_sk_diag_fill(sk
, inet_csk(sk
),
221 skb
, req
, user_ns
, portid
, seq
, nlmsg_flags
, unlh
);
224 static int inet_twsk_diag_fill(struct inet_timewait_sock
*tw
,
225 struct sk_buff
*skb
, struct inet_diag_req_v2
*req
,
226 u32 portid
, u32 seq
, u16 nlmsg_flags
,
227 const struct nlmsghdr
*unlh
)
230 struct inet_diag_msg
*r
;
231 struct nlmsghdr
*nlh
;
233 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
239 BUG_ON(tw
->tw_state
!= TCP_TIME_WAIT
);
241 tmo
= tw
->tw_ttd
- inet_tw_time_stamp();
245 r
->idiag_family
= tw
->tw_family
;
246 r
->idiag_retrans
= 0;
248 r
->id
.idiag_if
= tw
->tw_bound_dev_if
;
249 sock_diag_save_cookie(tw
, r
->id
.idiag_cookie
);
251 r
->id
.idiag_sport
= tw
->tw_sport
;
252 r
->id
.idiag_dport
= tw
->tw_dport
;
254 memset(&r
->id
.idiag_src
, 0, sizeof(r
->id
.idiag_src
));
255 memset(&r
->id
.idiag_dst
, 0, sizeof(r
->id
.idiag_dst
));
257 r
->id
.idiag_src
[0] = tw
->tw_rcv_saddr
;
258 r
->id
.idiag_dst
[0] = tw
->tw_daddr
;
260 r
->idiag_state
= tw
->tw_substate
;
262 r
->idiag_expires
= jiffies_to_msecs(tmo
);
267 #if IS_ENABLED(CONFIG_IPV6)
268 if (tw
->tw_family
== AF_INET6
) {
269 *(struct in6_addr
*)r
->id
.idiag_src
= tw
->tw_v6_rcv_saddr
;
270 *(struct in6_addr
*)r
->id
.idiag_dst
= tw
->tw_v6_daddr
;
274 return nlmsg_end(skb
, nlh
);
277 static int sk_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
278 struct inet_diag_req_v2
*r
,
279 struct user_namespace
*user_ns
,
280 u32 portid
, u32 seq
, u16 nlmsg_flags
,
281 const struct nlmsghdr
*unlh
)
283 if (sk
->sk_state
== TCP_TIME_WAIT
)
284 return inet_twsk_diag_fill(inet_twsk(sk
), skb
, r
, portid
, seq
,
287 return inet_csk_diag_fill(sk
, skb
, r
, user_ns
, portid
, seq
,
291 int inet_diag_dump_one_icsk(struct inet_hashinfo
*hashinfo
, struct sk_buff
*in_skb
,
292 const struct nlmsghdr
*nlh
, struct inet_diag_req_v2
*req
)
297 struct net
*net
= sock_net(in_skb
->sk
);
300 if (req
->sdiag_family
== AF_INET
) {
301 sk
= inet_lookup(net
, hashinfo
, req
->id
.idiag_dst
[0],
302 req
->id
.idiag_dport
, req
->id
.idiag_src
[0],
303 req
->id
.idiag_sport
, req
->id
.idiag_if
);
305 #if IS_ENABLED(CONFIG_IPV6)
306 else if (req
->sdiag_family
== AF_INET6
) {
307 sk
= inet6_lookup(net
, hashinfo
,
308 (struct in6_addr
*)req
->id
.idiag_dst
,
310 (struct in6_addr
*)req
->id
.idiag_src
,
323 err
= sock_diag_check_cookie(sk
, req
->id
.idiag_cookie
);
327 rep
= nlmsg_new(sizeof(struct inet_diag_msg
) +
328 sizeof(struct inet_diag_meminfo
) +
329 sizeof(struct tcp_info
) + 64, GFP_KERNEL
);
335 err
= sk_diag_fill(sk
, rep
, req
,
336 sk_user_ns(NETLINK_CB(in_skb
).sk
),
337 NETLINK_CB(in_skb
).portid
,
338 nlh
->nlmsg_seq
, 0, nlh
);
340 WARN_ON(err
== -EMSGSIZE
);
344 err
= netlink_unicast(net
->diag_nlsk
, rep
, NETLINK_CB(in_skb
).portid
,
356 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk
);
358 static int inet_diag_get_exact(struct sk_buff
*in_skb
,
359 const struct nlmsghdr
*nlh
,
360 struct inet_diag_req_v2
*req
)
362 const struct inet_diag_handler
*handler
;
365 handler
= inet_diag_lock_handler(req
->sdiag_protocol
);
367 err
= PTR_ERR(handler
);
369 err
= handler
->dump_one(in_skb
, nlh
, req
);
370 inet_diag_unlock_handler(handler
);
375 static int bitstring_match(const __be32
*a1
, const __be32
*a2
, int bits
)
377 int words
= bits
>> 5;
382 if (memcmp(a1
, a2
, words
<< 2))
392 mask
= htonl((0xffffffff) << (32 - bits
));
394 if ((w1
^ w2
) & mask
)
402 static int inet_diag_bc_run(const struct nlattr
*_bc
,
403 const struct inet_diag_entry
*entry
)
405 const void *bc
= nla_data(_bc
);
406 int len
= nla_len(_bc
);
410 const struct inet_diag_bc_op
*op
= bc
;
413 case INET_DIAG_BC_NOP
:
415 case INET_DIAG_BC_JMP
:
418 case INET_DIAG_BC_S_GE
:
419 yes
= entry
->sport
>= op
[1].no
;
421 case INET_DIAG_BC_S_LE
:
422 yes
= entry
->sport
<= op
[1].no
;
424 case INET_DIAG_BC_D_GE
:
425 yes
= entry
->dport
>= op
[1].no
;
427 case INET_DIAG_BC_D_LE
:
428 yes
= entry
->dport
<= op
[1].no
;
430 case INET_DIAG_BC_AUTO
:
431 yes
= !(entry
->userlocks
& SOCK_BINDPORT_LOCK
);
433 case INET_DIAG_BC_S_COND
:
434 case INET_DIAG_BC_D_COND
: {
435 struct inet_diag_hostcond
*cond
;
438 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
439 if (cond
->port
!= -1 &&
440 cond
->port
!= (op
->code
== INET_DIAG_BC_S_COND
?
441 entry
->sport
: entry
->dport
)) {
446 if (op
->code
== INET_DIAG_BC_S_COND
)
451 if (cond
->family
!= AF_UNSPEC
&&
452 cond
->family
!= entry
->family
) {
453 if (entry
->family
== AF_INET6
&&
454 cond
->family
== AF_INET
) {
455 if (addr
[0] == 0 && addr
[1] == 0 &&
456 addr
[2] == htonl(0xffff) &&
457 bitstring_match(addr
+ 3,
466 if (cond
->prefix_len
== 0)
468 if (bitstring_match(addr
, cond
->addr
,
487 int inet_diag_bc_sk(const struct nlattr
*bc
, struct sock
*sk
)
489 struct inet_diag_entry entry
;
490 struct inet_sock
*inet
= inet_sk(sk
);
495 entry
.family
= sk
->sk_family
;
496 #if IS_ENABLED(CONFIG_IPV6)
497 if (entry
.family
== AF_INET6
) {
499 entry
.saddr
= sk
->sk_v6_rcv_saddr
.s6_addr32
;
500 entry
.daddr
= sk
->sk_v6_daddr
.s6_addr32
;
504 entry
.saddr
= &inet
->inet_rcv_saddr
;
505 entry
.daddr
= &inet
->inet_daddr
;
507 entry
.sport
= inet
->inet_num
;
508 entry
.dport
= ntohs(inet
->inet_dport
);
509 entry
.userlocks
= sk
->sk_userlocks
;
511 return inet_diag_bc_run(bc
, &entry
);
513 EXPORT_SYMBOL_GPL(inet_diag_bc_sk
);
515 static int valid_cc(const void *bc
, int len
, int cc
)
518 const struct inet_diag_bc_op
*op
= bc
;
524 if (op
->yes
< 4 || op
->yes
& 3)
532 /* Validate an inet_diag_hostcond. */
533 static bool valid_hostcond(const struct inet_diag_bc_op
*op
, int len
,
537 struct inet_diag_hostcond
*cond
;
539 /* Check hostcond space. */
540 *min_len
+= sizeof(struct inet_diag_hostcond
);
543 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
545 /* Check address family and address length. */
546 switch (cond
->family
) {
551 addr_len
= sizeof(struct in_addr
);
554 addr_len
= sizeof(struct in6_addr
);
559 *min_len
+= addr_len
;
563 /* Check prefix length (in bits) vs address length (in bytes). */
564 if (cond
->prefix_len
> 8 * addr_len
)
570 /* Validate a port comparison operator. */
571 static inline bool valid_port_comparison(const struct inet_diag_bc_op
*op
,
572 int len
, int *min_len
)
574 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
575 *min_len
+= sizeof(struct inet_diag_bc_op
);
581 static int inet_diag_bc_audit(const void *bytecode
, int bytecode_len
)
583 const void *bc
= bytecode
;
584 int len
= bytecode_len
;
587 const struct inet_diag_bc_op
*op
= bc
;
588 int min_len
= sizeof(struct inet_diag_bc_op
);
590 //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
592 case INET_DIAG_BC_S_COND
:
593 case INET_DIAG_BC_D_COND
:
594 if (!valid_hostcond(bc
, len
, &min_len
))
597 case INET_DIAG_BC_S_GE
:
598 case INET_DIAG_BC_S_LE
:
599 case INET_DIAG_BC_D_GE
:
600 case INET_DIAG_BC_D_LE
:
601 if (!valid_port_comparison(bc
, len
, &min_len
))
604 case INET_DIAG_BC_AUTO
:
605 case INET_DIAG_BC_JMP
:
606 case INET_DIAG_BC_NOP
:
612 if (op
->code
!= INET_DIAG_BC_NOP
) {
613 if (op
->no
< min_len
|| op
->no
> len
+ 4 || op
->no
& 3)
616 !valid_cc(bytecode
, bytecode_len
, len
- op
->no
))
620 if (op
->yes
< min_len
|| op
->yes
> len
+ 4 || op
->yes
& 3)
625 return len
== 0 ? 0 : -EINVAL
;
628 static int inet_csk_diag_dump(struct sock
*sk
,
630 struct netlink_callback
*cb
,
631 struct inet_diag_req_v2
*r
,
632 const struct nlattr
*bc
)
634 if (!inet_diag_bc_sk(bc
, sk
))
637 return inet_csk_diag_fill(sk
, skb
, r
,
638 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
639 NETLINK_CB(cb
->skb
).portid
,
640 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
643 static int inet_twsk_diag_dump(struct sock
*sk
,
645 struct netlink_callback
*cb
,
646 struct inet_diag_req_v2
*r
,
647 const struct nlattr
*bc
)
649 struct inet_timewait_sock
*tw
= inet_twsk(sk
);
652 struct inet_diag_entry entry
;
654 entry
.family
= tw
->tw_family
;
655 #if IS_ENABLED(CONFIG_IPV6)
656 if (tw
->tw_family
== AF_INET6
) {
657 entry
.saddr
= tw
->tw_v6_rcv_saddr
.s6_addr32
;
658 entry
.daddr
= tw
->tw_v6_daddr
.s6_addr32
;
662 entry
.saddr
= &tw
->tw_rcv_saddr
;
663 entry
.daddr
= &tw
->tw_daddr
;
665 entry
.sport
= tw
->tw_num
;
666 entry
.dport
= ntohs(tw
->tw_dport
);
669 if (!inet_diag_bc_run(bc
, &entry
))
673 return inet_twsk_diag_fill(tw
, skb
, r
,
674 NETLINK_CB(cb
->skb
).portid
,
675 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
678 /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses
679 * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6.
681 static inline void inet_diag_req_addrs(const struct sock
*sk
,
682 const struct request_sock
*req
,
683 struct inet_diag_entry
*entry
)
685 struct inet_request_sock
*ireq
= inet_rsk(req
);
687 #if IS_ENABLED(CONFIG_IPV6)
688 if (sk
->sk_family
== AF_INET6
) {
689 if (req
->rsk_ops
->family
== AF_INET6
) {
690 entry
->saddr
= ireq
->ir_v6_loc_addr
.s6_addr32
;
691 entry
->daddr
= ireq
->ir_v6_rmt_addr
.s6_addr32
;
692 } else if (req
->rsk_ops
->family
== AF_INET
) {
693 ipv6_addr_set_v4mapped(ireq
->ir_loc_addr
,
694 &entry
->saddr_storage
);
695 ipv6_addr_set_v4mapped(ireq
->ir_rmt_addr
,
696 &entry
->daddr_storage
);
697 entry
->saddr
= entry
->saddr_storage
.s6_addr32
;
698 entry
->daddr
= entry
->daddr_storage
.s6_addr32
;
703 entry
->saddr
= &ireq
->ir_loc_addr
;
704 entry
->daddr
= &ireq
->ir_rmt_addr
;
708 static int inet_diag_fill_req(struct sk_buff
*skb
, struct sock
*sk
,
709 struct request_sock
*req
,
710 struct user_namespace
*user_ns
,
712 const struct nlmsghdr
*unlh
)
714 const struct inet_request_sock
*ireq
= inet_rsk(req
);
715 struct inet_sock
*inet
= inet_sk(sk
);
716 struct inet_diag_msg
*r
;
717 struct nlmsghdr
*nlh
;
720 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
726 r
->idiag_family
= sk
->sk_family
;
727 r
->idiag_state
= TCP_SYN_RECV
;
729 r
->idiag_retrans
= req
->num_retrans
;
731 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
732 sock_diag_save_cookie(req
, r
->id
.idiag_cookie
);
734 tmo
= req
->expires
- jiffies
;
738 r
->id
.idiag_sport
= inet
->inet_sport
;
739 r
->id
.idiag_dport
= ireq
->ir_rmt_port
;
741 memset(&r
->id
.idiag_src
, 0, sizeof(r
->id
.idiag_src
));
742 memset(&r
->id
.idiag_dst
, 0, sizeof(r
->id
.idiag_dst
));
744 r
->id
.idiag_src
[0] = ireq
->ir_loc_addr
;
745 r
->id
.idiag_dst
[0] = ireq
->ir_rmt_addr
;
747 r
->idiag_expires
= jiffies_to_msecs(tmo
);
750 r
->idiag_uid
= from_kuid_munged(user_ns
, sock_i_uid(sk
));
752 #if IS_ENABLED(CONFIG_IPV6)
753 if (r
->idiag_family
== AF_INET6
) {
754 struct inet_diag_entry entry
;
755 inet_diag_req_addrs(sk
, req
, &entry
);
756 memcpy(r
->id
.idiag_src
, entry
.saddr
, sizeof(struct in6_addr
));
757 memcpy(r
->id
.idiag_dst
, entry
.daddr
, sizeof(struct in6_addr
));
761 return nlmsg_end(skb
, nlh
);
764 static int inet_diag_dump_reqs(struct sk_buff
*skb
, struct sock
*sk
,
765 struct netlink_callback
*cb
,
766 struct inet_diag_req_v2
*r
,
767 const struct nlattr
*bc
)
769 struct inet_diag_entry entry
;
770 struct inet_connection_sock
*icsk
= inet_csk(sk
);
771 struct listen_sock
*lopt
;
772 struct inet_sock
*inet
= inet_sk(sk
);
774 int reqnum
, s_reqnum
;
778 s_reqnum
= cb
->args
[4];
783 entry
.family
= sk
->sk_family
;
785 read_lock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
787 lopt
= icsk
->icsk_accept_queue
.listen_opt
;
788 if (!lopt
|| !lopt
->qlen
)
792 entry
.sport
= inet
->inet_num
;
793 entry
.userlocks
= sk
->sk_userlocks
;
796 for (j
= s_j
; j
< lopt
->nr_table_entries
; j
++) {
797 struct request_sock
*req
, *head
= lopt
->syn_table
[j
];
800 for (req
= head
; req
; reqnum
++, req
= req
->dl_next
) {
801 struct inet_request_sock
*ireq
= inet_rsk(req
);
803 if (reqnum
< s_reqnum
)
805 if (r
->id
.idiag_dport
!= ireq
->ir_rmt_port
&&
810 inet_diag_req_addrs(sk
, req
, &entry
);
811 entry
.dport
= ntohs(ireq
->ir_rmt_port
);
813 if (!inet_diag_bc_run(bc
, &entry
))
817 err
= inet_diag_fill_req(skb
, sk
, req
,
818 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
819 NETLINK_CB(cb
->skb
).portid
,
820 cb
->nlh
->nlmsg_seq
, cb
->nlh
);
823 cb
->args
[4] = reqnum
;
832 read_unlock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
837 void inet_diag_dump_icsk(struct inet_hashinfo
*hashinfo
, struct sk_buff
*skb
,
838 struct netlink_callback
*cb
, struct inet_diag_req_v2
*r
, struct nlattr
*bc
)
842 struct net
*net
= sock_net(skb
->sk
);
845 s_num
= num
= cb
->args
[2];
847 if (cb
->args
[0] == 0) {
848 if (!(r
->idiag_states
& (TCPF_LISTEN
| TCPF_SYN_RECV
)))
851 for (i
= s_i
; i
< INET_LHTABLE_SIZE
; i
++) {
853 struct hlist_nulls_node
*node
;
854 struct inet_listen_hashbucket
*ilb
;
857 ilb
= &hashinfo
->listening_hash
[i
];
858 spin_lock_bh(&ilb
->lock
);
859 sk_nulls_for_each(sk
, node
, &ilb
->head
) {
860 struct inet_sock
*inet
= inet_sk(sk
);
862 if (!net_eq(sock_net(sk
), net
))
870 if (r
->sdiag_family
!= AF_UNSPEC
&&
871 sk
->sk_family
!= r
->sdiag_family
)
874 if (r
->id
.idiag_sport
!= inet
->inet_sport
&&
878 if (!(r
->idiag_states
& TCPF_LISTEN
) ||
883 if (inet_csk_diag_dump(sk
, skb
, cb
, r
, bc
) < 0) {
884 spin_unlock_bh(&ilb
->lock
);
889 if (!(r
->idiag_states
& TCPF_SYN_RECV
))
892 if (inet_diag_dump_reqs(skb
, sk
, cb
, r
, bc
) < 0) {
893 spin_unlock_bh(&ilb
->lock
);
902 spin_unlock_bh(&ilb
->lock
);
910 s_i
= num
= s_num
= 0;
913 if (!(r
->idiag_states
& ~(TCPF_LISTEN
| TCPF_SYN_RECV
)))
916 for (i
= s_i
; i
<= hashinfo
->ehash_mask
; i
++) {
917 struct inet_ehash_bucket
*head
= &hashinfo
->ehash
[i
];
918 spinlock_t
*lock
= inet_ehash_lockp(hashinfo
, i
);
920 struct hlist_nulls_node
*node
;
924 if (hlist_nulls_empty(&head
->chain
))
931 sk_nulls_for_each(sk
, node
, &head
->chain
) {
935 if (!net_eq(sock_net(sk
), net
))
939 state
= (sk
->sk_state
== TCP_TIME_WAIT
) ?
940 inet_twsk(sk
)->tw_substate
: sk
->sk_state
;
941 if (!(r
->idiag_states
& (1 << state
)))
943 if (r
->sdiag_family
!= AF_UNSPEC
&&
944 sk
->sk_family
!= r
->sdiag_family
)
946 if (r
->id
.idiag_sport
!= htons(sk
->sk_num
) &&
949 if (r
->id
.idiag_dport
!= sk
->sk_dport
&&
952 if (sk
->sk_state
== TCP_TIME_WAIT
)
953 res
= inet_twsk_diag_dump(sk
, skb
, cb
, r
, bc
);
955 res
= inet_csk_diag_dump(sk
, skb
, cb
, r
, bc
);
957 spin_unlock_bh(lock
);
964 spin_unlock_bh(lock
);
973 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk
);
975 static int __inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
976 struct inet_diag_req_v2
*r
, struct nlattr
*bc
)
978 const struct inet_diag_handler
*handler
;
981 handler
= inet_diag_lock_handler(r
->sdiag_protocol
);
982 if (!IS_ERR(handler
))
983 handler
->dump(skb
, cb
, r
, bc
);
985 err
= PTR_ERR(handler
);
986 inet_diag_unlock_handler(handler
);
988 return err
? : skb
->len
;
991 static int inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
993 struct nlattr
*bc
= NULL
;
994 int hdrlen
= sizeof(struct inet_diag_req_v2
);
996 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
997 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
999 return __inet_diag_dump(skb
, cb
, nlmsg_data(cb
->nlh
), bc
);
1002 static inline int inet_diag_type2proto(int type
)
1005 case TCPDIAG_GETSOCK
:
1007 case DCCPDIAG_GETSOCK
:
1008 return IPPROTO_DCCP
;
1014 static int inet_diag_dump_compat(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1016 struct inet_diag_req
*rc
= nlmsg_data(cb
->nlh
);
1017 struct inet_diag_req_v2 req
;
1018 struct nlattr
*bc
= NULL
;
1019 int hdrlen
= sizeof(struct inet_diag_req
);
1021 req
.sdiag_family
= AF_UNSPEC
; /* compatibility */
1022 req
.sdiag_protocol
= inet_diag_type2proto(cb
->nlh
->nlmsg_type
);
1023 req
.idiag_ext
= rc
->idiag_ext
;
1024 req
.idiag_states
= rc
->idiag_states
;
1027 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
1028 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
1030 return __inet_diag_dump(skb
, cb
, &req
, bc
);
1033 static int inet_diag_get_exact_compat(struct sk_buff
*in_skb
,
1034 const struct nlmsghdr
*nlh
)
1036 struct inet_diag_req
*rc
= nlmsg_data(nlh
);
1037 struct inet_diag_req_v2 req
;
1039 req
.sdiag_family
= rc
->idiag_family
;
1040 req
.sdiag_protocol
= inet_diag_type2proto(nlh
->nlmsg_type
);
1041 req
.idiag_ext
= rc
->idiag_ext
;
1042 req
.idiag_states
= rc
->idiag_states
;
1045 return inet_diag_get_exact(in_skb
, nlh
, &req
);
1048 static int inet_diag_rcv_msg_compat(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1050 int hdrlen
= sizeof(struct inet_diag_req
);
1051 struct net
*net
= sock_net(skb
->sk
);
1053 if (nlh
->nlmsg_type
>= INET_DIAG_GETSOCK_MAX
||
1054 nlmsg_len(nlh
) < hdrlen
)
1057 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1058 if (nlmsg_attrlen(nlh
, hdrlen
)) {
1059 struct nlattr
*attr
;
1061 attr
= nlmsg_find_attr(nlh
, hdrlen
,
1062 INET_DIAG_REQ_BYTECODE
);
1064 nla_len(attr
) < sizeof(struct inet_diag_bc_op
) ||
1065 inet_diag_bc_audit(nla_data(attr
), nla_len(attr
)))
1069 struct netlink_dump_control c
= {
1070 .dump
= inet_diag_dump_compat
,
1072 return netlink_dump_start(net
->diag_nlsk
, skb
, nlh
, &c
);
1076 return inet_diag_get_exact_compat(skb
, nlh
);
1079 static int inet_diag_handler_dump(struct sk_buff
*skb
, struct nlmsghdr
*h
)
1081 int hdrlen
= sizeof(struct inet_diag_req_v2
);
1082 struct net
*net
= sock_net(skb
->sk
);
1084 if (nlmsg_len(h
) < hdrlen
)
1087 if (h
->nlmsg_flags
& NLM_F_DUMP
) {
1088 if (nlmsg_attrlen(h
, hdrlen
)) {
1089 struct nlattr
*attr
;
1090 attr
= nlmsg_find_attr(h
, hdrlen
,
1091 INET_DIAG_REQ_BYTECODE
);
1093 nla_len(attr
) < sizeof(struct inet_diag_bc_op
) ||
1094 inet_diag_bc_audit(nla_data(attr
), nla_len(attr
)))
1098 struct netlink_dump_control c
= {
1099 .dump
= inet_diag_dump
,
1101 return netlink_dump_start(net
->diag_nlsk
, skb
, h
, &c
);
1105 return inet_diag_get_exact(skb
, h
, nlmsg_data(h
));
1108 static const struct sock_diag_handler inet_diag_handler
= {
1110 .dump
= inet_diag_handler_dump
,
1113 static const struct sock_diag_handler inet6_diag_handler
= {
1115 .dump
= inet_diag_handler_dump
,
1118 int inet_diag_register(const struct inet_diag_handler
*h
)
1120 const __u16 type
= h
->idiag_type
;
1123 if (type
>= IPPROTO_MAX
)
1126 mutex_lock(&inet_diag_table_mutex
);
1128 if (inet_diag_table
[type
] == NULL
) {
1129 inet_diag_table
[type
] = h
;
1132 mutex_unlock(&inet_diag_table_mutex
);
1136 EXPORT_SYMBOL_GPL(inet_diag_register
);
1138 void inet_diag_unregister(const struct inet_diag_handler
*h
)
1140 const __u16 type
= h
->idiag_type
;
1142 if (type
>= IPPROTO_MAX
)
1145 mutex_lock(&inet_diag_table_mutex
);
1146 inet_diag_table
[type
] = NULL
;
1147 mutex_unlock(&inet_diag_table_mutex
);
1149 EXPORT_SYMBOL_GPL(inet_diag_unregister
);
1151 static int __init
inet_diag_init(void)
1153 const int inet_diag_table_size
= (IPPROTO_MAX
*
1154 sizeof(struct inet_diag_handler
*));
1157 inet_diag_table
= kzalloc(inet_diag_table_size
, GFP_KERNEL
);
1158 if (!inet_diag_table
)
1161 err
= sock_diag_register(&inet_diag_handler
);
1165 err
= sock_diag_register(&inet6_diag_handler
);
1169 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat
);
1174 sock_diag_unregister(&inet_diag_handler
);
1176 kfree(inet_diag_table
);
1180 static void __exit
inet_diag_exit(void)
1182 sock_diag_unregister(&inet6_diag_handler
);
1183 sock_diag_unregister(&inet_diag_handler
);
1184 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat
);
1185 kfree(inet_diag_table
);
1188 module_init(inet_diag_init
);
1189 module_exit(inet_diag_exit
);
1190 MODULE_LICENSE("GPL");
1191 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 2 /* AF_INET */);
1192 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 10 /* AF_INET6 */);