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
{
51 static DEFINE_MUTEX(inet_diag_table_mutex
);
53 static const struct inet_diag_handler
*inet_diag_lock_handler(int proto
)
55 if (!inet_diag_table
[proto
])
56 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK
,
57 NETLINK_SOCK_DIAG
, AF_INET
, proto
);
59 mutex_lock(&inet_diag_table_mutex
);
60 if (!inet_diag_table
[proto
])
61 return ERR_PTR(-ENOENT
);
63 return inet_diag_table
[proto
];
66 static void inet_diag_unlock_handler(const struct inet_diag_handler
*handler
)
68 mutex_unlock(&inet_diag_table_mutex
);
71 void inet_diag_msg_common_fill(struct inet_diag_msg
*r
, struct sock
*sk
)
73 r
->idiag_family
= sk
->sk_family
;
75 r
->id
.idiag_sport
= htons(sk
->sk_num
);
76 r
->id
.idiag_dport
= sk
->sk_dport
;
77 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
78 sock_diag_save_cookie(sk
, r
->id
.idiag_cookie
);
80 #if IS_ENABLED(CONFIG_IPV6)
81 if (sk
->sk_family
== AF_INET6
) {
82 *(struct in6_addr
*)r
->id
.idiag_src
= sk
->sk_v6_rcv_saddr
;
83 *(struct in6_addr
*)r
->id
.idiag_dst
= sk
->sk_v6_daddr
;
87 memset(&r
->id
.idiag_src
, 0, sizeof(r
->id
.idiag_src
));
88 memset(&r
->id
.idiag_dst
, 0, sizeof(r
->id
.idiag_dst
));
90 r
->id
.idiag_src
[0] = sk
->sk_rcv_saddr
;
91 r
->id
.idiag_dst
[0] = sk
->sk_daddr
;
94 EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill
);
96 static size_t inet_sk_attr_size(void)
98 return nla_total_size(sizeof(struct tcp_info
))
99 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
100 + nla_total_size(1) /* INET_DIAG_TOS */
101 + nla_total_size(1) /* INET_DIAG_TCLASS */
102 + nla_total_size(4) /* INET_DIAG_MARK */
103 + nla_total_size(sizeof(struct inet_diag_meminfo
))
104 + nla_total_size(sizeof(struct inet_diag_msg
))
105 + nla_total_size(SK_MEMINFO_VARS
* sizeof(u32
))
106 + nla_total_size(TCP_CA_NAME_MAX
)
107 + nla_total_size(sizeof(struct tcpvegas_info
))
111 int inet_diag_msg_attrs_fill(struct sock
*sk
, struct sk_buff
*skb
,
112 struct inet_diag_msg
*r
, int ext
,
113 struct user_namespace
*user_ns
,
116 const struct inet_sock
*inet
= inet_sk(sk
);
118 if (nla_put_u8(skb
, INET_DIAG_SHUTDOWN
, sk
->sk_shutdown
))
121 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
122 * hence this needs to be included regardless of socket family.
124 if (ext
& (1 << (INET_DIAG_TOS
- 1)))
125 if (nla_put_u8(skb
, INET_DIAG_TOS
, inet
->tos
) < 0)
128 #if IS_ENABLED(CONFIG_IPV6)
129 if (r
->idiag_family
== AF_INET6
) {
130 if (ext
& (1 << (INET_DIAG_TCLASS
- 1)))
131 if (nla_put_u8(skb
, INET_DIAG_TCLASS
,
132 inet6_sk(sk
)->tclass
) < 0)
135 if (((1 << sk
->sk_state
) & (TCPF_LISTEN
| TCPF_CLOSE
)) &&
136 nla_put_u8(skb
, INET_DIAG_SKV6ONLY
, ipv6_only_sock(sk
)))
141 if (net_admin
&& nla_put_u32(skb
, INET_DIAG_MARK
, sk
->sk_mark
))
144 r
->idiag_uid
= from_kuid_munged(user_ns
, sock_i_uid(sk
));
145 r
->idiag_inode
= sock_i_ino(sk
);
151 EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill
);
153 int inet_sk_diag_fill(struct sock
*sk
, struct inet_connection_sock
*icsk
,
154 struct sk_buff
*skb
, const struct inet_diag_req_v2
*req
,
155 struct user_namespace
*user_ns
,
156 u32 portid
, u32 seq
, u16 nlmsg_flags
,
157 const struct nlmsghdr
*unlh
,
160 const struct tcp_congestion_ops
*ca_ops
;
161 const struct inet_diag_handler
*handler
;
162 int ext
= req
->idiag_ext
;
163 struct inet_diag_msg
*r
;
164 struct nlmsghdr
*nlh
;
168 handler
= inet_diag_table
[req
->sdiag_protocol
];
171 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
177 BUG_ON(!sk_fullsock(sk
));
179 inet_diag_msg_common_fill(r
, sk
);
180 r
->idiag_state
= sk
->sk_state
;
182 r
->idiag_retrans
= 0;
184 if (inet_diag_msg_attrs_fill(sk
, skb
, r
, ext
, user_ns
, net_admin
))
187 if (ext
& (1 << (INET_DIAG_MEMINFO
- 1))) {
188 struct inet_diag_meminfo minfo
= {
189 .idiag_rmem
= sk_rmem_alloc_get(sk
),
190 .idiag_wmem
= sk
->sk_wmem_queued
,
191 .idiag_fmem
= sk
->sk_forward_alloc
,
192 .idiag_tmem
= sk_wmem_alloc_get(sk
),
195 if (nla_put(skb
, INET_DIAG_MEMINFO
, sizeof(minfo
), &minfo
) < 0)
199 if (ext
& (1 << (INET_DIAG_SKMEMINFO
- 1)))
200 if (sock_diag_put_meminfo(sk
, skb
, INET_DIAG_SKMEMINFO
))
204 * RAW sockets might have user-defined protocols assigned,
205 * so report the one supplied on socket creation.
207 if (sk
->sk_type
== SOCK_RAW
) {
208 if (nla_put_u8(skb
, INET_DIAG_PROTOCOL
, sk
->sk_protocol
))
213 handler
->idiag_get_info(sk
, r
, NULL
);
217 if (icsk
->icsk_pending
== ICSK_TIME_RETRANS
||
218 icsk
->icsk_pending
== ICSK_TIME_EARLY_RETRANS
||
219 icsk
->icsk_pending
== ICSK_TIME_LOSS_PROBE
) {
221 r
->idiag_retrans
= icsk
->icsk_retransmits
;
223 jiffies_to_msecs(icsk
->icsk_timeout
- jiffies
);
224 } else if (icsk
->icsk_pending
== ICSK_TIME_PROBE0
) {
226 r
->idiag_retrans
= icsk
->icsk_probes_out
;
228 jiffies_to_msecs(icsk
->icsk_timeout
- jiffies
);
229 } else if (timer_pending(&sk
->sk_timer
)) {
231 r
->idiag_retrans
= icsk
->icsk_probes_out
;
233 jiffies_to_msecs(sk
->sk_timer
.expires
- jiffies
);
236 r
->idiag_expires
= 0;
239 if ((ext
& (1 << (INET_DIAG_INFO
- 1))) && handler
->idiag_info_size
) {
240 attr
= nla_reserve_64bit(skb
, INET_DIAG_INFO
,
241 handler
->idiag_info_size
,
246 info
= nla_data(attr
);
249 if (ext
& (1 << (INET_DIAG_CONG
- 1))) {
253 ca_ops
= READ_ONCE(icsk
->icsk_ca_ops
);
255 err
= nla_put_string(skb
, INET_DIAG_CONG
, ca_ops
->name
);
261 handler
->idiag_get_info(sk
, r
, info
);
263 if (sk
->sk_state
< TCP_TIME_WAIT
) {
264 union tcp_cc_info info
;
269 ca_ops
= READ_ONCE(icsk
->icsk_ca_ops
);
270 if (ca_ops
&& ca_ops
->get_info
)
271 sz
= ca_ops
->get_info(sk
, ext
, &attr
, &info
);
273 if (sz
&& nla_put(skb
, attr
, sz
, &info
) < 0)
282 nlmsg_cancel(skb
, nlh
);
285 EXPORT_SYMBOL_GPL(inet_sk_diag_fill
);
287 static int inet_csk_diag_fill(struct sock
*sk
,
289 const struct inet_diag_req_v2
*req
,
290 struct user_namespace
*user_ns
,
291 u32 portid
, u32 seq
, u16 nlmsg_flags
,
292 const struct nlmsghdr
*unlh
,
295 return inet_sk_diag_fill(sk
, inet_csk(sk
), skb
, req
, user_ns
,
296 portid
, seq
, nlmsg_flags
, unlh
, net_admin
);
299 static int inet_twsk_diag_fill(struct sock
*sk
,
301 u32 portid
, u32 seq
, u16 nlmsg_flags
,
302 const struct nlmsghdr
*unlh
)
304 struct inet_timewait_sock
*tw
= inet_twsk(sk
);
305 struct inet_diag_msg
*r
;
306 struct nlmsghdr
*nlh
;
309 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
315 BUG_ON(tw
->tw_state
!= TCP_TIME_WAIT
);
317 tmo
= tw
->tw_timer
.expires
- jiffies
;
321 inet_diag_msg_common_fill(r
, sk
);
322 r
->idiag_retrans
= 0;
324 r
->idiag_state
= tw
->tw_substate
;
326 r
->idiag_expires
= jiffies_to_msecs(tmo
);
336 static int inet_req_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
337 u32 portid
, u32 seq
, u16 nlmsg_flags
,
338 const struct nlmsghdr
*unlh
, bool net_admin
)
340 struct request_sock
*reqsk
= inet_reqsk(sk
);
341 struct inet_diag_msg
*r
;
342 struct nlmsghdr
*nlh
;
345 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
351 inet_diag_msg_common_fill(r
, sk
);
352 r
->idiag_state
= TCP_SYN_RECV
;
354 r
->idiag_retrans
= reqsk
->num_retrans
;
356 BUILD_BUG_ON(offsetof(struct inet_request_sock
, ir_cookie
) !=
357 offsetof(struct sock
, sk_cookie
));
359 tmo
= inet_reqsk(sk
)->rsk_timer
.expires
- jiffies
;
360 r
->idiag_expires
= (tmo
>= 0) ? jiffies_to_msecs(tmo
) : 0;
366 if (net_admin
&& nla_put_u32(skb
, INET_DIAG_MARK
,
367 inet_rsk(reqsk
)->ir_mark
))
374 static int sk_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
375 const struct inet_diag_req_v2
*r
,
376 struct user_namespace
*user_ns
,
377 u32 portid
, u32 seq
, u16 nlmsg_flags
,
378 const struct nlmsghdr
*unlh
, bool net_admin
)
380 if (sk
->sk_state
== TCP_TIME_WAIT
)
381 return inet_twsk_diag_fill(sk
, skb
, portid
, seq
,
384 if (sk
->sk_state
== TCP_NEW_SYN_RECV
)
385 return inet_req_diag_fill(sk
, skb
, portid
, seq
,
386 nlmsg_flags
, unlh
, net_admin
);
388 return inet_csk_diag_fill(sk
, skb
, r
, user_ns
, portid
, seq
,
389 nlmsg_flags
, unlh
, net_admin
);
392 struct sock
*inet_diag_find_one_icsk(struct net
*net
,
393 struct inet_hashinfo
*hashinfo
,
394 const struct inet_diag_req_v2
*req
)
399 if (req
->sdiag_family
== AF_INET
)
400 sk
= inet_lookup(net
, hashinfo
, NULL
, 0, req
->id
.idiag_dst
[0],
401 req
->id
.idiag_dport
, req
->id
.idiag_src
[0],
402 req
->id
.idiag_sport
, req
->id
.idiag_if
);
403 #if IS_ENABLED(CONFIG_IPV6)
404 else if (req
->sdiag_family
== AF_INET6
) {
405 if (ipv6_addr_v4mapped((struct in6_addr
*)req
->id
.idiag_dst
) &&
406 ipv6_addr_v4mapped((struct in6_addr
*)req
->id
.idiag_src
))
407 sk
= inet_lookup(net
, hashinfo
, NULL
, 0, req
->id
.idiag_dst
[3],
408 req
->id
.idiag_dport
, req
->id
.idiag_src
[3],
409 req
->id
.idiag_sport
, req
->id
.idiag_if
);
411 sk
= inet6_lookup(net
, hashinfo
, NULL
, 0,
412 (struct in6_addr
*)req
->id
.idiag_dst
,
414 (struct in6_addr
*)req
->id
.idiag_src
,
421 return ERR_PTR(-EINVAL
);
425 return ERR_PTR(-ENOENT
);
427 if (sock_diag_check_cookie(sk
, req
->id
.idiag_cookie
)) {
429 return ERR_PTR(-ENOENT
);
434 EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk
);
436 int inet_diag_dump_one_icsk(struct inet_hashinfo
*hashinfo
,
437 struct sk_buff
*in_skb
,
438 const struct nlmsghdr
*nlh
,
439 const struct inet_diag_req_v2
*req
)
441 struct net
*net
= sock_net(in_skb
->sk
);
446 sk
= inet_diag_find_one_icsk(net
, hashinfo
, req
);
450 rep
= nlmsg_new(inet_sk_attr_size(), GFP_KERNEL
);
456 err
= sk_diag_fill(sk
, rep
, req
,
457 sk_user_ns(NETLINK_CB(in_skb
).sk
),
458 NETLINK_CB(in_skb
).portid
,
459 nlh
->nlmsg_seq
, 0, nlh
,
460 netlink_net_capable(in_skb
, CAP_NET_ADMIN
));
462 WARN_ON(err
== -EMSGSIZE
);
466 err
= netlink_unicast(net
->diag_nlsk
, rep
, NETLINK_CB(in_skb
).portid
,
477 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk
);
479 static int inet_diag_cmd_exact(int cmd
, struct sk_buff
*in_skb
,
480 const struct nlmsghdr
*nlh
,
481 const struct inet_diag_req_v2
*req
)
483 const struct inet_diag_handler
*handler
;
486 handler
= inet_diag_lock_handler(req
->sdiag_protocol
);
488 err
= PTR_ERR(handler
);
489 else if (cmd
== SOCK_DIAG_BY_FAMILY
)
490 err
= handler
->dump_one(in_skb
, nlh
, req
);
491 else if (cmd
== SOCK_DESTROY
&& handler
->destroy
)
492 err
= handler
->destroy(in_skb
, req
);
495 inet_diag_unlock_handler(handler
);
500 static int bitstring_match(const __be32
*a1
, const __be32
*a2
, int bits
)
502 int words
= bits
>> 5;
507 if (memcmp(a1
, a2
, words
<< 2))
517 mask
= htonl((0xffffffff) << (32 - bits
));
519 if ((w1
^ w2
) & mask
)
526 static int inet_diag_bc_run(const struct nlattr
*_bc
,
527 const struct inet_diag_entry
*entry
)
529 const void *bc
= nla_data(_bc
);
530 int len
= nla_len(_bc
);
534 const struct inet_diag_bc_op
*op
= bc
;
537 case INET_DIAG_BC_NOP
:
539 case INET_DIAG_BC_JMP
:
542 case INET_DIAG_BC_S_GE
:
543 yes
= entry
->sport
>= op
[1].no
;
545 case INET_DIAG_BC_S_LE
:
546 yes
= entry
->sport
<= op
[1].no
;
548 case INET_DIAG_BC_D_GE
:
549 yes
= entry
->dport
>= op
[1].no
;
551 case INET_DIAG_BC_D_LE
:
552 yes
= entry
->dport
<= op
[1].no
;
554 case INET_DIAG_BC_AUTO
:
555 yes
= !(entry
->userlocks
& SOCK_BINDPORT_LOCK
);
557 case INET_DIAG_BC_S_COND
:
558 case INET_DIAG_BC_D_COND
: {
559 const struct inet_diag_hostcond
*cond
;
562 cond
= (const struct inet_diag_hostcond
*)(op
+ 1);
563 if (cond
->port
!= -1 &&
564 cond
->port
!= (op
->code
== INET_DIAG_BC_S_COND
?
565 entry
->sport
: entry
->dport
)) {
570 if (op
->code
== INET_DIAG_BC_S_COND
)
575 if (cond
->family
!= AF_UNSPEC
&&
576 cond
->family
!= entry
->family
) {
577 if (entry
->family
== AF_INET6
&&
578 cond
->family
== AF_INET
) {
579 if (addr
[0] == 0 && addr
[1] == 0 &&
580 addr
[2] == htonl(0xffff) &&
581 bitstring_match(addr
+ 3,
590 if (cond
->prefix_len
== 0)
592 if (bitstring_match(addr
, cond
->addr
,
598 case INET_DIAG_BC_DEV_COND
: {
601 ifindex
= *((const u32
*)(op
+ 1));
602 if (ifindex
!= entry
->ifindex
)
606 case INET_DIAG_BC_MARK_COND
: {
607 struct inet_diag_markcond
*cond
;
609 cond
= (struct inet_diag_markcond
*)(op
+ 1);
610 if ((entry
->mark
& cond
->mask
) != cond
->mark
)
627 /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
629 static void entry_fill_addrs(struct inet_diag_entry
*entry
,
630 const struct sock
*sk
)
632 #if IS_ENABLED(CONFIG_IPV6)
633 if (sk
->sk_family
== AF_INET6
) {
634 entry
->saddr
= sk
->sk_v6_rcv_saddr
.s6_addr32
;
635 entry
->daddr
= sk
->sk_v6_daddr
.s6_addr32
;
639 entry
->saddr
= &sk
->sk_rcv_saddr
;
640 entry
->daddr
= &sk
->sk_daddr
;
644 int inet_diag_bc_sk(const struct nlattr
*bc
, struct sock
*sk
)
646 struct inet_sock
*inet
= inet_sk(sk
);
647 struct inet_diag_entry entry
;
652 entry
.family
= sk
->sk_family
;
653 entry_fill_addrs(&entry
, sk
);
654 entry
.sport
= inet
->inet_num
;
655 entry
.dport
= ntohs(inet
->inet_dport
);
656 entry
.ifindex
= sk
->sk_bound_dev_if
;
657 entry
.userlocks
= sk_fullsock(sk
) ? sk
->sk_userlocks
: 0;
659 entry
.mark
= sk
->sk_mark
;
660 else if (sk
->sk_state
== TCP_NEW_SYN_RECV
)
661 entry
.mark
= inet_rsk(inet_reqsk(sk
))->ir_mark
;
665 return inet_diag_bc_run(bc
, &entry
);
667 EXPORT_SYMBOL_GPL(inet_diag_bc_sk
);
669 static int valid_cc(const void *bc
, int len
, int cc
)
672 const struct inet_diag_bc_op
*op
= bc
;
678 if (op
->yes
< 4 || op
->yes
& 3)
686 /* data is u32 ifindex */
687 static bool valid_devcond(const struct inet_diag_bc_op
*op
, int len
,
690 /* Check ifindex space. */
691 *min_len
+= sizeof(u32
);
697 /* Validate an inet_diag_hostcond. */
698 static bool valid_hostcond(const struct inet_diag_bc_op
*op
, int len
,
701 struct inet_diag_hostcond
*cond
;
704 /* Check hostcond space. */
705 *min_len
+= sizeof(struct inet_diag_hostcond
);
708 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
710 /* Check address family and address length. */
711 switch (cond
->family
) {
716 addr_len
= sizeof(struct in_addr
);
719 addr_len
= sizeof(struct in6_addr
);
724 *min_len
+= addr_len
;
728 /* Check prefix length (in bits) vs address length (in bytes). */
729 if (cond
->prefix_len
> 8 * addr_len
)
735 /* Validate a port comparison operator. */
736 static bool valid_port_comparison(const struct inet_diag_bc_op
*op
,
737 int len
, int *min_len
)
739 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
740 *min_len
+= sizeof(struct inet_diag_bc_op
);
746 static bool valid_markcond(const struct inet_diag_bc_op
*op
, int len
,
749 *min_len
+= sizeof(struct inet_diag_markcond
);
750 return len
>= *min_len
;
753 static int inet_diag_bc_audit(const struct nlattr
*attr
,
754 const struct sk_buff
*skb
)
756 bool net_admin
= netlink_net_capable(skb
, CAP_NET_ADMIN
);
757 const void *bytecode
, *bc
;
758 int bytecode_len
, len
;
760 if (!attr
|| nla_len(attr
) < sizeof(struct inet_diag_bc_op
))
763 bytecode
= bc
= nla_data(attr
);
764 len
= bytecode_len
= nla_len(attr
);
767 int min_len
= sizeof(struct inet_diag_bc_op
);
768 const struct inet_diag_bc_op
*op
= bc
;
771 case INET_DIAG_BC_S_COND
:
772 case INET_DIAG_BC_D_COND
:
773 if (!valid_hostcond(bc
, len
, &min_len
))
776 case INET_DIAG_BC_DEV_COND
:
777 if (!valid_devcond(bc
, len
, &min_len
))
780 case INET_DIAG_BC_S_GE
:
781 case INET_DIAG_BC_S_LE
:
782 case INET_DIAG_BC_D_GE
:
783 case INET_DIAG_BC_D_LE
:
784 if (!valid_port_comparison(bc
, len
, &min_len
))
787 case INET_DIAG_BC_MARK_COND
:
790 if (!valid_markcond(bc
, len
, &min_len
))
793 case INET_DIAG_BC_AUTO
:
794 case INET_DIAG_BC_JMP
:
795 case INET_DIAG_BC_NOP
:
801 if (op
->code
!= INET_DIAG_BC_NOP
) {
802 if (op
->no
< min_len
|| op
->no
> len
+ 4 || op
->no
& 3)
805 !valid_cc(bytecode
, bytecode_len
, len
- op
->no
))
809 if (op
->yes
< min_len
|| op
->yes
> len
+ 4 || op
->yes
& 3)
814 return len
== 0 ? 0 : -EINVAL
;
817 static int inet_csk_diag_dump(struct sock
*sk
,
819 struct netlink_callback
*cb
,
820 const struct inet_diag_req_v2
*r
,
821 const struct nlattr
*bc
,
824 if (!inet_diag_bc_sk(bc
, sk
))
827 return inet_csk_diag_fill(sk
, skb
, r
,
828 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
829 NETLINK_CB(cb
->skb
).portid
,
830 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
,
834 static void twsk_build_assert(void)
836 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_family
) !=
837 offsetof(struct sock
, sk_family
));
839 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_num
) !=
840 offsetof(struct inet_sock
, inet_num
));
842 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_dport
) !=
843 offsetof(struct inet_sock
, inet_dport
));
845 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_rcv_saddr
) !=
846 offsetof(struct inet_sock
, inet_rcv_saddr
));
848 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_daddr
) !=
849 offsetof(struct inet_sock
, inet_daddr
));
851 #if IS_ENABLED(CONFIG_IPV6)
852 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_v6_rcv_saddr
) !=
853 offsetof(struct sock
, sk_v6_rcv_saddr
));
855 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_v6_daddr
) !=
856 offsetof(struct sock
, sk_v6_daddr
));
860 void inet_diag_dump_icsk(struct inet_hashinfo
*hashinfo
, struct sk_buff
*skb
,
861 struct netlink_callback
*cb
,
862 const struct inet_diag_req_v2
*r
, struct nlattr
*bc
)
864 bool net_admin
= netlink_net_capable(cb
->skb
, CAP_NET_ADMIN
);
865 struct net
*net
= sock_net(skb
->sk
);
866 u32 idiag_states
= r
->idiag_states
;
867 int i
, num
, s_i
, s_num
;
870 if (idiag_states
& TCPF_SYN_RECV
)
871 idiag_states
|= TCPF_NEW_SYN_RECV
;
873 s_num
= num
= cb
->args
[2];
875 if (cb
->args
[0] == 0) {
876 if (!(idiag_states
& TCPF_LISTEN
) || r
->id
.idiag_dport
)
879 for (i
= s_i
; i
< INET_LHTABLE_SIZE
; i
++) {
880 struct inet_listen_hashbucket
*ilb
;
883 ilb
= &hashinfo
->listening_hash
[i
];
884 spin_lock(&ilb
->lock
);
885 sk_for_each(sk
, &ilb
->head
) {
886 struct inet_sock
*inet
= inet_sk(sk
);
888 if (!net_eq(sock_net(sk
), net
))
896 if (r
->sdiag_family
!= AF_UNSPEC
&&
897 sk
->sk_family
!= r
->sdiag_family
)
900 if (r
->id
.idiag_sport
!= inet
->inet_sport
&&
904 if (inet_csk_diag_dump(sk
, skb
, cb
, r
,
905 bc
, net_admin
) < 0) {
906 spin_unlock(&ilb
->lock
);
913 spin_unlock(&ilb
->lock
);
919 s_i
= num
= s_num
= 0;
922 if (!(idiag_states
& ~TCPF_LISTEN
))
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
);
929 struct hlist_nulls_node
*node
;
930 struct sock
*sk_arr
[SKARR_SZ
];
931 int num_arr
[SKARR_SZ
];
934 if (hlist_nulls_empty(&head
->chain
))
944 sk_nulls_for_each(sk
, node
, &head
->chain
) {
947 if (!net_eq(sock_net(sk
), net
))
951 state
= (sk
->sk_state
== TCP_TIME_WAIT
) ?
952 inet_twsk(sk
)->tw_substate
: sk
->sk_state
;
953 if (!(idiag_states
& (1 << state
)))
955 if (r
->sdiag_family
!= AF_UNSPEC
&&
956 sk
->sk_family
!= r
->sdiag_family
)
958 if (r
->id
.idiag_sport
!= htons(sk
->sk_num
) &&
961 if (r
->id
.idiag_dport
!= sk
->sk_dport
&&
966 if (!inet_diag_bc_sk(bc
, sk
))
970 num_arr
[accum
] = num
;
972 if (++accum
== SKARR_SZ
)
977 spin_unlock_bh(lock
);
979 for (idx
= 0; idx
< accum
; idx
++) {
981 res
= sk_diag_fill(sk_arr
[idx
], skb
, r
,
982 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
983 NETLINK_CB(cb
->skb
).portid
,
984 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
989 sock_gen_put(sk_arr
[idx
]);
994 if (accum
== SKARR_SZ
) {
1006 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk
);
1008 static int __inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
1009 const struct inet_diag_req_v2
*r
,
1012 const struct inet_diag_handler
*handler
;
1015 handler
= inet_diag_lock_handler(r
->sdiag_protocol
);
1016 if (!IS_ERR(handler
))
1017 handler
->dump(skb
, cb
, r
, bc
);
1019 err
= PTR_ERR(handler
);
1020 inet_diag_unlock_handler(handler
);
1022 return err
? : skb
->len
;
1025 static int inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1027 int hdrlen
= sizeof(struct inet_diag_req_v2
);
1028 struct nlattr
*bc
= NULL
;
1030 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
1031 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
1033 return __inet_diag_dump(skb
, cb
, nlmsg_data(cb
->nlh
), bc
);
1036 static int inet_diag_type2proto(int type
)
1039 case TCPDIAG_GETSOCK
:
1041 case DCCPDIAG_GETSOCK
:
1042 return IPPROTO_DCCP
;
1048 static int inet_diag_dump_compat(struct sk_buff
*skb
,
1049 struct netlink_callback
*cb
)
1051 struct inet_diag_req
*rc
= nlmsg_data(cb
->nlh
);
1052 int hdrlen
= sizeof(struct inet_diag_req
);
1053 struct inet_diag_req_v2 req
;
1054 struct nlattr
*bc
= NULL
;
1056 req
.sdiag_family
= AF_UNSPEC
; /* compatibility */
1057 req
.sdiag_protocol
= inet_diag_type2proto(cb
->nlh
->nlmsg_type
);
1058 req
.idiag_ext
= rc
->idiag_ext
;
1059 req
.idiag_states
= rc
->idiag_states
;
1062 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
1063 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
1065 return __inet_diag_dump(skb
, cb
, &req
, bc
);
1068 static int inet_diag_get_exact_compat(struct sk_buff
*in_skb
,
1069 const struct nlmsghdr
*nlh
)
1071 struct inet_diag_req
*rc
= nlmsg_data(nlh
);
1072 struct inet_diag_req_v2 req
;
1074 req
.sdiag_family
= rc
->idiag_family
;
1075 req
.sdiag_protocol
= inet_diag_type2proto(nlh
->nlmsg_type
);
1076 req
.idiag_ext
= rc
->idiag_ext
;
1077 req
.idiag_states
= rc
->idiag_states
;
1080 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY
, in_skb
, nlh
, &req
);
1083 static int inet_diag_rcv_msg_compat(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1085 int hdrlen
= sizeof(struct inet_diag_req
);
1086 struct net
*net
= sock_net(skb
->sk
);
1088 if (nlh
->nlmsg_type
>= INET_DIAG_GETSOCK_MAX
||
1089 nlmsg_len(nlh
) < hdrlen
)
1092 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1093 if (nlmsg_attrlen(nlh
, hdrlen
)) {
1094 struct nlattr
*attr
;
1097 attr
= nlmsg_find_attr(nlh
, hdrlen
,
1098 INET_DIAG_REQ_BYTECODE
);
1099 err
= inet_diag_bc_audit(attr
, skb
);
1104 struct netlink_dump_control c
= {
1105 .dump
= inet_diag_dump_compat
,
1107 return netlink_dump_start(net
->diag_nlsk
, skb
, nlh
, &c
);
1111 return inet_diag_get_exact_compat(skb
, nlh
);
1114 static int inet_diag_handler_cmd(struct sk_buff
*skb
, struct nlmsghdr
*h
)
1116 int hdrlen
= sizeof(struct inet_diag_req_v2
);
1117 struct net
*net
= sock_net(skb
->sk
);
1119 if (nlmsg_len(h
) < hdrlen
)
1122 if (h
->nlmsg_type
== SOCK_DIAG_BY_FAMILY
&&
1123 h
->nlmsg_flags
& NLM_F_DUMP
) {
1124 if (nlmsg_attrlen(h
, hdrlen
)) {
1125 struct nlattr
*attr
;
1128 attr
= nlmsg_find_attr(h
, hdrlen
,
1129 INET_DIAG_REQ_BYTECODE
);
1130 err
= inet_diag_bc_audit(attr
, skb
);
1135 struct netlink_dump_control c
= {
1136 .dump
= inet_diag_dump
,
1138 return netlink_dump_start(net
->diag_nlsk
, skb
, h
, &c
);
1142 return inet_diag_cmd_exact(h
->nlmsg_type
, skb
, h
, nlmsg_data(h
));
1146 int inet_diag_handler_get_info(struct sk_buff
*skb
, struct sock
*sk
)
1148 const struct inet_diag_handler
*handler
;
1149 struct nlmsghdr
*nlh
;
1150 struct nlattr
*attr
;
1151 struct inet_diag_msg
*r
;
1155 nlh
= nlmsg_put(skb
, 0, 0, SOCK_DIAG_BY_FAMILY
, sizeof(*r
), 0);
1159 r
= nlmsg_data(nlh
);
1160 memset(r
, 0, sizeof(*r
));
1161 inet_diag_msg_common_fill(r
, sk
);
1162 if (sk
->sk_type
== SOCK_DGRAM
|| sk
->sk_type
== SOCK_STREAM
)
1163 r
->id
.idiag_sport
= inet_sk(sk
)->inet_sport
;
1164 r
->idiag_state
= sk
->sk_state
;
1166 if ((err
= nla_put_u8(skb
, INET_DIAG_PROTOCOL
, sk
->sk_protocol
))) {
1167 nlmsg_cancel(skb
, nlh
);
1171 handler
= inet_diag_lock_handler(sk
->sk_protocol
);
1172 if (IS_ERR(handler
)) {
1173 inet_diag_unlock_handler(handler
);
1174 nlmsg_cancel(skb
, nlh
);
1175 return PTR_ERR(handler
);
1178 attr
= handler
->idiag_info_size
1179 ? nla_reserve_64bit(skb
, INET_DIAG_INFO
,
1180 handler
->idiag_info_size
,
1184 info
= nla_data(attr
);
1186 handler
->idiag_get_info(sk
, r
, info
);
1187 inet_diag_unlock_handler(handler
);
1189 nlmsg_end(skb
, nlh
);
1193 static const struct sock_diag_handler inet_diag_handler
= {
1195 .dump
= inet_diag_handler_cmd
,
1196 .get_info
= inet_diag_handler_get_info
,
1197 .destroy
= inet_diag_handler_cmd
,
1200 static const struct sock_diag_handler inet6_diag_handler
= {
1202 .dump
= inet_diag_handler_cmd
,
1203 .get_info
= inet_diag_handler_get_info
,
1204 .destroy
= inet_diag_handler_cmd
,
1207 int inet_diag_register(const struct inet_diag_handler
*h
)
1209 const __u16 type
= h
->idiag_type
;
1212 if (type
>= IPPROTO_MAX
)
1215 mutex_lock(&inet_diag_table_mutex
);
1217 if (!inet_diag_table
[type
]) {
1218 inet_diag_table
[type
] = h
;
1221 mutex_unlock(&inet_diag_table_mutex
);
1225 EXPORT_SYMBOL_GPL(inet_diag_register
);
1227 void inet_diag_unregister(const struct inet_diag_handler
*h
)
1229 const __u16 type
= h
->idiag_type
;
1231 if (type
>= IPPROTO_MAX
)
1234 mutex_lock(&inet_diag_table_mutex
);
1235 inet_diag_table
[type
] = NULL
;
1236 mutex_unlock(&inet_diag_table_mutex
);
1238 EXPORT_SYMBOL_GPL(inet_diag_unregister
);
1240 static int __init
inet_diag_init(void)
1242 const int inet_diag_table_size
= (IPPROTO_MAX
*
1243 sizeof(struct inet_diag_handler
*));
1246 inet_diag_table
= kzalloc(inet_diag_table_size
, GFP_KERNEL
);
1247 if (!inet_diag_table
)
1250 err
= sock_diag_register(&inet_diag_handler
);
1254 err
= sock_diag_register(&inet6_diag_handler
);
1258 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat
);
1263 sock_diag_unregister(&inet_diag_handler
);
1265 kfree(inet_diag_table
);
1269 static void __exit
inet_diag_exit(void)
1271 sock_diag_unregister(&inet6_diag_handler
);
1272 sock_diag_unregister(&inet_diag_handler
);
1273 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat
);
1274 kfree(inet_diag_table
);
1277 module_init(inet_diag_init
);
1278 module_exit(inet_diag_exit
);
1279 MODULE_LICENSE("GPL");
1280 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 2 /* AF_INET */);
1281 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 10 /* AF_INET6 */);