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
);
210 nlmsg_cancel(skb
, nlh
);
213 EXPORT_SYMBOL_GPL(inet_sk_diag_fill
);
215 static int inet_csk_diag_fill(struct sock
*sk
,
216 struct sk_buff
*skb
, struct inet_diag_req_v2
*req
,
217 struct user_namespace
*user_ns
,
218 u32 portid
, u32 seq
, u16 nlmsg_flags
,
219 const struct nlmsghdr
*unlh
)
221 return inet_sk_diag_fill(sk
, inet_csk(sk
),
222 skb
, req
, user_ns
, portid
, seq
, nlmsg_flags
, unlh
);
225 static int inet_twsk_diag_fill(struct inet_timewait_sock
*tw
,
226 struct sk_buff
*skb
, struct inet_diag_req_v2
*req
,
227 u32 portid
, u32 seq
, u16 nlmsg_flags
,
228 const struct nlmsghdr
*unlh
)
231 struct inet_diag_msg
*r
;
232 struct nlmsghdr
*nlh
;
234 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
240 BUG_ON(tw
->tw_state
!= TCP_TIME_WAIT
);
242 tmo
= tw
->tw_ttd
- inet_tw_time_stamp();
246 r
->idiag_family
= tw
->tw_family
;
247 r
->idiag_retrans
= 0;
249 r
->id
.idiag_if
= tw
->tw_bound_dev_if
;
250 sock_diag_save_cookie(tw
, r
->id
.idiag_cookie
);
252 r
->id
.idiag_sport
= tw
->tw_sport
;
253 r
->id
.idiag_dport
= tw
->tw_dport
;
255 memset(&r
->id
.idiag_src
, 0, sizeof(r
->id
.idiag_src
));
256 memset(&r
->id
.idiag_dst
, 0, sizeof(r
->id
.idiag_dst
));
258 r
->id
.idiag_src
[0] = tw
->tw_rcv_saddr
;
259 r
->id
.idiag_dst
[0] = tw
->tw_daddr
;
261 r
->idiag_state
= tw
->tw_substate
;
263 r
->idiag_expires
= jiffies_to_msecs(tmo
);
268 #if IS_ENABLED(CONFIG_IPV6)
269 if (tw
->tw_family
== AF_INET6
) {
270 *(struct in6_addr
*)r
->id
.idiag_src
= tw
->tw_v6_rcv_saddr
;
271 *(struct in6_addr
*)r
->id
.idiag_dst
= tw
->tw_v6_daddr
;
279 static int sk_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
280 struct inet_diag_req_v2
*r
,
281 struct user_namespace
*user_ns
,
282 u32 portid
, u32 seq
, u16 nlmsg_flags
,
283 const struct nlmsghdr
*unlh
)
285 if (sk
->sk_state
== TCP_TIME_WAIT
)
286 return inet_twsk_diag_fill(inet_twsk(sk
), skb
, r
, portid
, seq
,
289 return inet_csk_diag_fill(sk
, skb
, r
, user_ns
, portid
, seq
,
293 int inet_diag_dump_one_icsk(struct inet_hashinfo
*hashinfo
, struct sk_buff
*in_skb
,
294 const struct nlmsghdr
*nlh
, struct inet_diag_req_v2
*req
)
299 struct net
*net
= sock_net(in_skb
->sk
);
302 if (req
->sdiag_family
== AF_INET
) {
303 sk
= inet_lookup(net
, hashinfo
, req
->id
.idiag_dst
[0],
304 req
->id
.idiag_dport
, req
->id
.idiag_src
[0],
305 req
->id
.idiag_sport
, req
->id
.idiag_if
);
307 #if IS_ENABLED(CONFIG_IPV6)
308 else if (req
->sdiag_family
== AF_INET6
) {
309 sk
= inet6_lookup(net
, hashinfo
,
310 (struct in6_addr
*)req
->id
.idiag_dst
,
312 (struct in6_addr
*)req
->id
.idiag_src
,
325 err
= sock_diag_check_cookie(sk
, req
->id
.idiag_cookie
);
329 rep
= nlmsg_new(sizeof(struct inet_diag_msg
) +
330 sizeof(struct inet_diag_meminfo
) +
331 sizeof(struct tcp_info
) + 64, GFP_KERNEL
);
337 err
= sk_diag_fill(sk
, rep
, req
,
338 sk_user_ns(NETLINK_CB(in_skb
).sk
),
339 NETLINK_CB(in_skb
).portid
,
340 nlh
->nlmsg_seq
, 0, nlh
);
342 WARN_ON(err
== -EMSGSIZE
);
346 err
= netlink_unicast(net
->diag_nlsk
, rep
, NETLINK_CB(in_skb
).portid
,
358 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk
);
360 static int inet_diag_get_exact(struct sk_buff
*in_skb
,
361 const struct nlmsghdr
*nlh
,
362 struct inet_diag_req_v2
*req
)
364 const struct inet_diag_handler
*handler
;
367 handler
= inet_diag_lock_handler(req
->sdiag_protocol
);
369 err
= PTR_ERR(handler
);
371 err
= handler
->dump_one(in_skb
, nlh
, req
);
372 inet_diag_unlock_handler(handler
);
377 static int bitstring_match(const __be32
*a1
, const __be32
*a2
, int bits
)
379 int words
= bits
>> 5;
384 if (memcmp(a1
, a2
, words
<< 2))
394 mask
= htonl((0xffffffff) << (32 - bits
));
396 if ((w1
^ w2
) & mask
)
404 static int inet_diag_bc_run(const struct nlattr
*_bc
,
405 const struct inet_diag_entry
*entry
)
407 const void *bc
= nla_data(_bc
);
408 int len
= nla_len(_bc
);
412 const struct inet_diag_bc_op
*op
= bc
;
415 case INET_DIAG_BC_NOP
:
417 case INET_DIAG_BC_JMP
:
420 case INET_DIAG_BC_S_GE
:
421 yes
= entry
->sport
>= op
[1].no
;
423 case INET_DIAG_BC_S_LE
:
424 yes
= entry
->sport
<= op
[1].no
;
426 case INET_DIAG_BC_D_GE
:
427 yes
= entry
->dport
>= op
[1].no
;
429 case INET_DIAG_BC_D_LE
:
430 yes
= entry
->dport
<= op
[1].no
;
432 case INET_DIAG_BC_AUTO
:
433 yes
= !(entry
->userlocks
& SOCK_BINDPORT_LOCK
);
435 case INET_DIAG_BC_S_COND
:
436 case INET_DIAG_BC_D_COND
: {
437 struct inet_diag_hostcond
*cond
;
440 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
441 if (cond
->port
!= -1 &&
442 cond
->port
!= (op
->code
== INET_DIAG_BC_S_COND
?
443 entry
->sport
: entry
->dport
)) {
448 if (op
->code
== INET_DIAG_BC_S_COND
)
453 if (cond
->family
!= AF_UNSPEC
&&
454 cond
->family
!= entry
->family
) {
455 if (entry
->family
== AF_INET6
&&
456 cond
->family
== AF_INET
) {
457 if (addr
[0] == 0 && addr
[1] == 0 &&
458 addr
[2] == htonl(0xffff) &&
459 bitstring_match(addr
+ 3,
468 if (cond
->prefix_len
== 0)
470 if (bitstring_match(addr
, cond
->addr
,
489 int inet_diag_bc_sk(const struct nlattr
*bc
, struct sock
*sk
)
491 struct inet_diag_entry entry
;
492 struct inet_sock
*inet
= inet_sk(sk
);
497 entry
.family
= sk
->sk_family
;
498 #if IS_ENABLED(CONFIG_IPV6)
499 if (entry
.family
== AF_INET6
) {
501 entry
.saddr
= sk
->sk_v6_rcv_saddr
.s6_addr32
;
502 entry
.daddr
= sk
->sk_v6_daddr
.s6_addr32
;
506 entry
.saddr
= &inet
->inet_rcv_saddr
;
507 entry
.daddr
= &inet
->inet_daddr
;
509 entry
.sport
= inet
->inet_num
;
510 entry
.dport
= ntohs(inet
->inet_dport
);
511 entry
.userlocks
= (sk
->sk_state
!= TCP_TIME_WAIT
) ? sk
->sk_userlocks
: 0;
513 return inet_diag_bc_run(bc
, &entry
);
515 EXPORT_SYMBOL_GPL(inet_diag_bc_sk
);
517 static int valid_cc(const void *bc
, int len
, int cc
)
520 const struct inet_diag_bc_op
*op
= bc
;
526 if (op
->yes
< 4 || op
->yes
& 3)
534 /* Validate an inet_diag_hostcond. */
535 static bool valid_hostcond(const struct inet_diag_bc_op
*op
, int len
,
539 struct inet_diag_hostcond
*cond
;
541 /* Check hostcond space. */
542 *min_len
+= sizeof(struct inet_diag_hostcond
);
545 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
547 /* Check address family and address length. */
548 switch (cond
->family
) {
553 addr_len
= sizeof(struct in_addr
);
556 addr_len
= sizeof(struct in6_addr
);
561 *min_len
+= addr_len
;
565 /* Check prefix length (in bits) vs address length (in bytes). */
566 if (cond
->prefix_len
> 8 * addr_len
)
572 /* Validate a port comparison operator. */
573 static inline bool valid_port_comparison(const struct inet_diag_bc_op
*op
,
574 int len
, int *min_len
)
576 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
577 *min_len
+= sizeof(struct inet_diag_bc_op
);
583 static int inet_diag_bc_audit(const void *bytecode
, int bytecode_len
)
585 const void *bc
= bytecode
;
586 int len
= bytecode_len
;
589 const struct inet_diag_bc_op
*op
= bc
;
590 int min_len
= sizeof(struct inet_diag_bc_op
);
592 //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
594 case INET_DIAG_BC_S_COND
:
595 case INET_DIAG_BC_D_COND
:
596 if (!valid_hostcond(bc
, len
, &min_len
))
599 case INET_DIAG_BC_S_GE
:
600 case INET_DIAG_BC_S_LE
:
601 case INET_DIAG_BC_D_GE
:
602 case INET_DIAG_BC_D_LE
:
603 if (!valid_port_comparison(bc
, len
, &min_len
))
606 case INET_DIAG_BC_AUTO
:
607 case INET_DIAG_BC_JMP
:
608 case INET_DIAG_BC_NOP
:
614 if (op
->code
!= INET_DIAG_BC_NOP
) {
615 if (op
->no
< min_len
|| op
->no
> len
+ 4 || op
->no
& 3)
618 !valid_cc(bytecode
, bytecode_len
, len
- op
->no
))
622 if (op
->yes
< min_len
|| op
->yes
> len
+ 4 || op
->yes
& 3)
627 return len
== 0 ? 0 : -EINVAL
;
630 static int inet_csk_diag_dump(struct sock
*sk
,
632 struct netlink_callback
*cb
,
633 struct inet_diag_req_v2
*r
,
634 const struct nlattr
*bc
)
636 if (!inet_diag_bc_sk(bc
, sk
))
639 return inet_csk_diag_fill(sk
, skb
, r
,
640 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
641 NETLINK_CB(cb
->skb
).portid
,
642 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
645 static void twsk_build_assert(void)
647 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_family
) !=
648 offsetof(struct sock
, sk_family
));
650 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_num
) !=
651 offsetof(struct inet_sock
, inet_num
));
653 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_dport
) !=
654 offsetof(struct inet_sock
, inet_dport
));
656 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_rcv_saddr
) !=
657 offsetof(struct inet_sock
, inet_rcv_saddr
));
659 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_daddr
) !=
660 offsetof(struct inet_sock
, inet_daddr
));
662 #if IS_ENABLED(CONFIG_IPV6)
663 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_v6_rcv_saddr
) !=
664 offsetof(struct sock
, sk_v6_rcv_saddr
));
666 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_v6_daddr
) !=
667 offsetof(struct sock
, sk_v6_daddr
));
671 static int inet_twsk_diag_dump(struct sock
*sk
,
673 struct netlink_callback
*cb
,
674 struct inet_diag_req_v2
*r
,
675 const struct nlattr
*bc
)
679 if (!inet_diag_bc_sk(bc
, sk
))
682 return inet_twsk_diag_fill(inet_twsk(sk
), skb
, r
,
683 NETLINK_CB(cb
->skb
).portid
,
684 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
);
687 /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses
688 * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6.
690 static inline void inet_diag_req_addrs(const struct sock
*sk
,
691 const struct request_sock
*req
,
692 struct inet_diag_entry
*entry
)
694 struct inet_request_sock
*ireq
= inet_rsk(req
);
696 #if IS_ENABLED(CONFIG_IPV6)
697 if (sk
->sk_family
== AF_INET6
) {
698 if (req
->rsk_ops
->family
== AF_INET6
) {
699 entry
->saddr
= ireq
->ir_v6_loc_addr
.s6_addr32
;
700 entry
->daddr
= ireq
->ir_v6_rmt_addr
.s6_addr32
;
701 } else if (req
->rsk_ops
->family
== AF_INET
) {
702 ipv6_addr_set_v4mapped(ireq
->ir_loc_addr
,
703 &entry
->saddr_storage
);
704 ipv6_addr_set_v4mapped(ireq
->ir_rmt_addr
,
705 &entry
->daddr_storage
);
706 entry
->saddr
= entry
->saddr_storage
.s6_addr32
;
707 entry
->daddr
= entry
->daddr_storage
.s6_addr32
;
712 entry
->saddr
= &ireq
->ir_loc_addr
;
713 entry
->daddr
= &ireq
->ir_rmt_addr
;
717 static int inet_diag_fill_req(struct sk_buff
*skb
, struct sock
*sk
,
718 struct request_sock
*req
,
719 struct user_namespace
*user_ns
,
721 const struct nlmsghdr
*unlh
)
723 const struct inet_request_sock
*ireq
= inet_rsk(req
);
724 struct inet_sock
*inet
= inet_sk(sk
);
725 struct inet_diag_msg
*r
;
726 struct nlmsghdr
*nlh
;
729 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
735 r
->idiag_family
= sk
->sk_family
;
736 r
->idiag_state
= TCP_SYN_RECV
;
738 r
->idiag_retrans
= req
->num_retrans
;
740 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
741 sock_diag_save_cookie(req
, r
->id
.idiag_cookie
);
743 tmo
= req
->expires
- jiffies
;
747 r
->id
.idiag_sport
= inet
->inet_sport
;
748 r
->id
.idiag_dport
= ireq
->ir_rmt_port
;
750 memset(&r
->id
.idiag_src
, 0, sizeof(r
->id
.idiag_src
));
751 memset(&r
->id
.idiag_dst
, 0, sizeof(r
->id
.idiag_dst
));
753 r
->id
.idiag_src
[0] = ireq
->ir_loc_addr
;
754 r
->id
.idiag_dst
[0] = ireq
->ir_rmt_addr
;
756 r
->idiag_expires
= jiffies_to_msecs(tmo
);
759 r
->idiag_uid
= from_kuid_munged(user_ns
, sock_i_uid(sk
));
761 #if IS_ENABLED(CONFIG_IPV6)
762 if (r
->idiag_family
== AF_INET6
) {
763 struct inet_diag_entry entry
;
764 inet_diag_req_addrs(sk
, req
, &entry
);
765 memcpy(r
->id
.idiag_src
, entry
.saddr
, sizeof(struct in6_addr
));
766 memcpy(r
->id
.idiag_dst
, entry
.daddr
, sizeof(struct in6_addr
));
774 static int inet_diag_dump_reqs(struct sk_buff
*skb
, struct sock
*sk
,
775 struct netlink_callback
*cb
,
776 struct inet_diag_req_v2
*r
,
777 const struct nlattr
*bc
)
779 struct inet_diag_entry entry
;
780 struct inet_connection_sock
*icsk
= inet_csk(sk
);
781 struct listen_sock
*lopt
;
782 struct inet_sock
*inet
= inet_sk(sk
);
784 int reqnum
, s_reqnum
;
788 s_reqnum
= cb
->args
[4];
793 entry
.family
= sk
->sk_family
;
795 read_lock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
797 lopt
= icsk
->icsk_accept_queue
.listen_opt
;
798 if (!lopt
|| !lopt
->qlen
)
802 entry
.sport
= inet
->inet_num
;
803 entry
.userlocks
= sk
->sk_userlocks
;
806 for (j
= s_j
; j
< lopt
->nr_table_entries
; j
++) {
807 struct request_sock
*req
, *head
= lopt
->syn_table
[j
];
810 for (req
= head
; req
; reqnum
++, req
= req
->dl_next
) {
811 struct inet_request_sock
*ireq
= inet_rsk(req
);
813 if (reqnum
< s_reqnum
)
815 if (r
->id
.idiag_dport
!= ireq
->ir_rmt_port
&&
820 inet_diag_req_addrs(sk
, req
, &entry
);
821 entry
.dport
= ntohs(ireq
->ir_rmt_port
);
823 if (!inet_diag_bc_run(bc
, &entry
))
827 err
= inet_diag_fill_req(skb
, sk
, req
,
828 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
829 NETLINK_CB(cb
->skb
).portid
,
830 cb
->nlh
->nlmsg_seq
, cb
->nlh
);
833 cb
->args
[4] = reqnum
;
842 read_unlock_bh(&icsk
->icsk_accept_queue
.syn_wait_lock
);
847 void inet_diag_dump_icsk(struct inet_hashinfo
*hashinfo
, struct sk_buff
*skb
,
848 struct netlink_callback
*cb
, struct inet_diag_req_v2
*r
, struct nlattr
*bc
)
852 struct net
*net
= sock_net(skb
->sk
);
855 s_num
= num
= cb
->args
[2];
857 if (cb
->args
[0] == 0) {
858 if (!(r
->idiag_states
& (TCPF_LISTEN
| TCPF_SYN_RECV
)))
861 for (i
= s_i
; i
< INET_LHTABLE_SIZE
; i
++) {
863 struct hlist_nulls_node
*node
;
864 struct inet_listen_hashbucket
*ilb
;
867 ilb
= &hashinfo
->listening_hash
[i
];
868 spin_lock_bh(&ilb
->lock
);
869 sk_nulls_for_each(sk
, node
, &ilb
->head
) {
870 struct inet_sock
*inet
= inet_sk(sk
);
872 if (!net_eq(sock_net(sk
), net
))
880 if (r
->sdiag_family
!= AF_UNSPEC
&&
881 sk
->sk_family
!= r
->sdiag_family
)
884 if (r
->id
.idiag_sport
!= inet
->inet_sport
&&
888 if (!(r
->idiag_states
& TCPF_LISTEN
) ||
893 if (inet_csk_diag_dump(sk
, skb
, cb
, r
, bc
) < 0) {
894 spin_unlock_bh(&ilb
->lock
);
899 if (!(r
->idiag_states
& TCPF_SYN_RECV
))
902 if (inet_diag_dump_reqs(skb
, sk
, cb
, r
, bc
) < 0) {
903 spin_unlock_bh(&ilb
->lock
);
912 spin_unlock_bh(&ilb
->lock
);
920 s_i
= num
= s_num
= 0;
923 if (!(r
->idiag_states
& ~(TCPF_LISTEN
| TCPF_SYN_RECV
)))
926 for (i
= s_i
; i
<= hashinfo
->ehash_mask
; i
++) {
927 struct inet_ehash_bucket
*head
= &hashinfo
->ehash
[i
];
928 spinlock_t
*lock
= inet_ehash_lockp(hashinfo
, i
);
930 struct hlist_nulls_node
*node
;
934 if (hlist_nulls_empty(&head
->chain
))
941 sk_nulls_for_each(sk
, node
, &head
->chain
) {
945 if (!net_eq(sock_net(sk
), net
))
949 state
= (sk
->sk_state
== TCP_TIME_WAIT
) ?
950 inet_twsk(sk
)->tw_substate
: sk
->sk_state
;
951 if (!(r
->idiag_states
& (1 << state
)))
953 if (r
->sdiag_family
!= AF_UNSPEC
&&
954 sk
->sk_family
!= r
->sdiag_family
)
956 if (r
->id
.idiag_sport
!= htons(sk
->sk_num
) &&
959 if (r
->id
.idiag_dport
!= sk
->sk_dport
&&
962 if (sk
->sk_state
== TCP_TIME_WAIT
)
963 res
= inet_twsk_diag_dump(sk
, skb
, cb
, r
, bc
);
965 res
= inet_csk_diag_dump(sk
, skb
, cb
, r
, bc
);
967 spin_unlock_bh(lock
);
974 spin_unlock_bh(lock
);
983 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk
);
985 static int __inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
986 struct inet_diag_req_v2
*r
, struct nlattr
*bc
)
988 const struct inet_diag_handler
*handler
;
991 handler
= inet_diag_lock_handler(r
->sdiag_protocol
);
992 if (!IS_ERR(handler
))
993 handler
->dump(skb
, cb
, r
, bc
);
995 err
= PTR_ERR(handler
);
996 inet_diag_unlock_handler(handler
);
998 return err
? : skb
->len
;
1001 static int inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1003 struct nlattr
*bc
= NULL
;
1004 int hdrlen
= sizeof(struct inet_diag_req_v2
);
1006 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
1007 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
1009 return __inet_diag_dump(skb
, cb
, nlmsg_data(cb
->nlh
), bc
);
1012 static inline int inet_diag_type2proto(int type
)
1015 case TCPDIAG_GETSOCK
:
1017 case DCCPDIAG_GETSOCK
:
1018 return IPPROTO_DCCP
;
1024 static int inet_diag_dump_compat(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1026 struct inet_diag_req
*rc
= nlmsg_data(cb
->nlh
);
1027 struct inet_diag_req_v2 req
;
1028 struct nlattr
*bc
= NULL
;
1029 int hdrlen
= sizeof(struct inet_diag_req
);
1031 req
.sdiag_family
= AF_UNSPEC
; /* compatibility */
1032 req
.sdiag_protocol
= inet_diag_type2proto(cb
->nlh
->nlmsg_type
);
1033 req
.idiag_ext
= rc
->idiag_ext
;
1034 req
.idiag_states
= rc
->idiag_states
;
1037 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
1038 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
1040 return __inet_diag_dump(skb
, cb
, &req
, bc
);
1043 static int inet_diag_get_exact_compat(struct sk_buff
*in_skb
,
1044 const struct nlmsghdr
*nlh
)
1046 struct inet_diag_req
*rc
= nlmsg_data(nlh
);
1047 struct inet_diag_req_v2 req
;
1049 req
.sdiag_family
= rc
->idiag_family
;
1050 req
.sdiag_protocol
= inet_diag_type2proto(nlh
->nlmsg_type
);
1051 req
.idiag_ext
= rc
->idiag_ext
;
1052 req
.idiag_states
= rc
->idiag_states
;
1055 return inet_diag_get_exact(in_skb
, nlh
, &req
);
1058 static int inet_diag_rcv_msg_compat(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1060 int hdrlen
= sizeof(struct inet_diag_req
);
1061 struct net
*net
= sock_net(skb
->sk
);
1063 if (nlh
->nlmsg_type
>= INET_DIAG_GETSOCK_MAX
||
1064 nlmsg_len(nlh
) < hdrlen
)
1067 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1068 if (nlmsg_attrlen(nlh
, hdrlen
)) {
1069 struct nlattr
*attr
;
1071 attr
= nlmsg_find_attr(nlh
, hdrlen
,
1072 INET_DIAG_REQ_BYTECODE
);
1074 nla_len(attr
) < sizeof(struct inet_diag_bc_op
) ||
1075 inet_diag_bc_audit(nla_data(attr
), nla_len(attr
)))
1079 struct netlink_dump_control c
= {
1080 .dump
= inet_diag_dump_compat
,
1082 return netlink_dump_start(net
->diag_nlsk
, skb
, nlh
, &c
);
1086 return inet_diag_get_exact_compat(skb
, nlh
);
1089 static int inet_diag_handler_dump(struct sk_buff
*skb
, struct nlmsghdr
*h
)
1091 int hdrlen
= sizeof(struct inet_diag_req_v2
);
1092 struct net
*net
= sock_net(skb
->sk
);
1094 if (nlmsg_len(h
) < hdrlen
)
1097 if (h
->nlmsg_flags
& NLM_F_DUMP
) {
1098 if (nlmsg_attrlen(h
, hdrlen
)) {
1099 struct nlattr
*attr
;
1100 attr
= nlmsg_find_attr(h
, hdrlen
,
1101 INET_DIAG_REQ_BYTECODE
);
1103 nla_len(attr
) < sizeof(struct inet_diag_bc_op
) ||
1104 inet_diag_bc_audit(nla_data(attr
), nla_len(attr
)))
1108 struct netlink_dump_control c
= {
1109 .dump
= inet_diag_dump
,
1111 return netlink_dump_start(net
->diag_nlsk
, skb
, h
, &c
);
1115 return inet_diag_get_exact(skb
, h
, nlmsg_data(h
));
1118 static const struct sock_diag_handler inet_diag_handler
= {
1120 .dump
= inet_diag_handler_dump
,
1123 static const struct sock_diag_handler inet6_diag_handler
= {
1125 .dump
= inet_diag_handler_dump
,
1128 int inet_diag_register(const struct inet_diag_handler
*h
)
1130 const __u16 type
= h
->idiag_type
;
1133 if (type
>= IPPROTO_MAX
)
1136 mutex_lock(&inet_diag_table_mutex
);
1138 if (inet_diag_table
[type
] == NULL
) {
1139 inet_diag_table
[type
] = h
;
1142 mutex_unlock(&inet_diag_table_mutex
);
1146 EXPORT_SYMBOL_GPL(inet_diag_register
);
1148 void inet_diag_unregister(const struct inet_diag_handler
*h
)
1150 const __u16 type
= h
->idiag_type
;
1152 if (type
>= IPPROTO_MAX
)
1155 mutex_lock(&inet_diag_table_mutex
);
1156 inet_diag_table
[type
] = NULL
;
1157 mutex_unlock(&inet_diag_table_mutex
);
1159 EXPORT_SYMBOL_GPL(inet_diag_unregister
);
1161 static int __init
inet_diag_init(void)
1163 const int inet_diag_table_size
= (IPPROTO_MAX
*
1164 sizeof(struct inet_diag_handler
*));
1167 inet_diag_table
= kzalloc(inet_diag_table_size
, GFP_KERNEL
);
1168 if (!inet_diag_table
)
1171 err
= sock_diag_register(&inet_diag_handler
);
1175 err
= sock_diag_register(&inet6_diag_handler
);
1179 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat
);
1184 sock_diag_unregister(&inet_diag_handler
);
1186 kfree(inet_diag_table
);
1190 static void __exit
inet_diag_exit(void)
1192 sock_diag_unregister(&inet6_diag_handler
);
1193 sock_diag_unregister(&inet_diag_handler
);
1194 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat
);
1195 kfree(inet_diag_table
);
1198 module_init(inet_diag_init
);
1199 module_exit(inet_diag_exit
);
1200 MODULE_LICENSE("GPL");
1201 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 2 /* AF_INET */);
1202 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 10 /* AF_INET6 */);