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 sock_load_diag_module(AF_INET
, proto
);
58 mutex_lock(&inet_diag_table_mutex
);
59 if (!inet_diag_table
[proto
])
60 return ERR_PTR(-ENOENT
);
62 return inet_diag_table
[proto
];
65 static void inet_diag_unlock_handler(const struct inet_diag_handler
*handler
)
67 mutex_unlock(&inet_diag_table_mutex
);
70 void inet_diag_msg_common_fill(struct inet_diag_msg
*r
, struct sock
*sk
)
72 r
->idiag_family
= sk
->sk_family
;
74 r
->id
.idiag_sport
= htons(sk
->sk_num
);
75 r
->id
.idiag_dport
= sk
->sk_dport
;
76 r
->id
.idiag_if
= sk
->sk_bound_dev_if
;
77 sock_diag_save_cookie(sk
, r
->id
.idiag_cookie
);
79 #if IS_ENABLED(CONFIG_IPV6)
80 if (sk
->sk_family
== AF_INET6
) {
81 *(struct in6_addr
*)r
->id
.idiag_src
= sk
->sk_v6_rcv_saddr
;
82 *(struct in6_addr
*)r
->id
.idiag_dst
= sk
->sk_v6_daddr
;
86 memset(&r
->id
.idiag_src
, 0, sizeof(r
->id
.idiag_src
));
87 memset(&r
->id
.idiag_dst
, 0, sizeof(r
->id
.idiag_dst
));
89 r
->id
.idiag_src
[0] = sk
->sk_rcv_saddr
;
90 r
->id
.idiag_dst
[0] = sk
->sk_daddr
;
93 EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill
);
95 static size_t inet_sk_attr_size(struct sock
*sk
,
96 const struct inet_diag_req_v2
*req
,
99 const struct inet_diag_handler
*handler
;
102 handler
= inet_diag_table
[req
->sdiag_protocol
];
103 if (handler
&& handler
->idiag_get_aux_size
)
104 aux
= handler
->idiag_get_aux_size(sk
, net_admin
);
106 return nla_total_size(sizeof(struct tcp_info
))
107 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
108 + nla_total_size(1) /* INET_DIAG_TOS */
109 + nla_total_size(1) /* INET_DIAG_TCLASS */
110 + nla_total_size(4) /* INET_DIAG_MARK */
111 + nla_total_size(4) /* INET_DIAG_CLASS_ID */
112 + nla_total_size(sizeof(struct inet_diag_meminfo
))
113 + nla_total_size(sizeof(struct inet_diag_msg
))
114 + nla_total_size(SK_MEMINFO_VARS
* sizeof(u32
))
115 + nla_total_size(TCP_CA_NAME_MAX
)
116 + nla_total_size(sizeof(struct tcpvegas_info
))
121 int inet_diag_msg_attrs_fill(struct sock
*sk
, struct sk_buff
*skb
,
122 struct inet_diag_msg
*r
, int ext
,
123 struct user_namespace
*user_ns
,
126 const struct inet_sock
*inet
= inet_sk(sk
);
128 if (nla_put_u8(skb
, INET_DIAG_SHUTDOWN
, sk
->sk_shutdown
))
131 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
132 * hence this needs to be included regardless of socket family.
134 if (ext
& (1 << (INET_DIAG_TOS
- 1)))
135 if (nla_put_u8(skb
, INET_DIAG_TOS
, inet
->tos
) < 0)
138 #if IS_ENABLED(CONFIG_IPV6)
139 if (r
->idiag_family
== AF_INET6
) {
140 if (ext
& (1 << (INET_DIAG_TCLASS
- 1)))
141 if (nla_put_u8(skb
, INET_DIAG_TCLASS
,
142 inet6_sk(sk
)->tclass
) < 0)
145 if (((1 << sk
->sk_state
) & (TCPF_LISTEN
| TCPF_CLOSE
)) &&
146 nla_put_u8(skb
, INET_DIAG_SKV6ONLY
, ipv6_only_sock(sk
)))
151 if (net_admin
&& nla_put_u32(skb
, INET_DIAG_MARK
, sk
->sk_mark
))
154 r
->idiag_uid
= from_kuid_munged(user_ns
, sock_i_uid(sk
));
155 r
->idiag_inode
= sock_i_ino(sk
);
161 EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill
);
163 int inet_sk_diag_fill(struct sock
*sk
, struct inet_connection_sock
*icsk
,
164 struct sk_buff
*skb
, const struct inet_diag_req_v2
*req
,
165 struct user_namespace
*user_ns
,
166 u32 portid
, u32 seq
, u16 nlmsg_flags
,
167 const struct nlmsghdr
*unlh
,
170 const struct tcp_congestion_ops
*ca_ops
;
171 const struct inet_diag_handler
*handler
;
172 int ext
= req
->idiag_ext
;
173 struct inet_diag_msg
*r
;
174 struct nlmsghdr
*nlh
;
178 handler
= inet_diag_table
[req
->sdiag_protocol
];
181 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
187 BUG_ON(!sk_fullsock(sk
));
189 inet_diag_msg_common_fill(r
, sk
);
190 r
->idiag_state
= sk
->sk_state
;
192 r
->idiag_retrans
= 0;
194 if (inet_diag_msg_attrs_fill(sk
, skb
, r
, ext
, user_ns
, net_admin
))
197 if (ext
& (1 << (INET_DIAG_MEMINFO
- 1))) {
198 struct inet_diag_meminfo minfo
= {
199 .idiag_rmem
= sk_rmem_alloc_get(sk
),
200 .idiag_wmem
= sk
->sk_wmem_queued
,
201 .idiag_fmem
= sk
->sk_forward_alloc
,
202 .idiag_tmem
= sk_wmem_alloc_get(sk
),
205 if (nla_put(skb
, INET_DIAG_MEMINFO
, sizeof(minfo
), &minfo
) < 0)
209 if (ext
& (1 << (INET_DIAG_SKMEMINFO
- 1)))
210 if (sock_diag_put_meminfo(sk
, skb
, INET_DIAG_SKMEMINFO
))
214 * RAW sockets might have user-defined protocols assigned,
215 * so report the one supplied on socket creation.
217 if (sk
->sk_type
== SOCK_RAW
) {
218 if (nla_put_u8(skb
, INET_DIAG_PROTOCOL
, sk
->sk_protocol
))
223 handler
->idiag_get_info(sk
, r
, NULL
);
227 if (icsk
->icsk_pending
== ICSK_TIME_RETRANS
||
228 icsk
->icsk_pending
== ICSK_TIME_REO_TIMEOUT
||
229 icsk
->icsk_pending
== ICSK_TIME_LOSS_PROBE
) {
231 r
->idiag_retrans
= icsk
->icsk_retransmits
;
233 jiffies_to_msecs(icsk
->icsk_timeout
- jiffies
);
234 } else if (icsk
->icsk_pending
== ICSK_TIME_PROBE0
) {
236 r
->idiag_retrans
= icsk
->icsk_probes_out
;
238 jiffies_to_msecs(icsk
->icsk_timeout
- jiffies
);
239 } else if (timer_pending(&sk
->sk_timer
)) {
241 r
->idiag_retrans
= icsk
->icsk_probes_out
;
243 jiffies_to_msecs(sk
->sk_timer
.expires
- jiffies
);
246 r
->idiag_expires
= 0;
249 if ((ext
& (1 << (INET_DIAG_INFO
- 1))) && handler
->idiag_info_size
) {
250 attr
= nla_reserve_64bit(skb
, INET_DIAG_INFO
,
251 handler
->idiag_info_size
,
256 info
= nla_data(attr
);
259 if (ext
& (1 << (INET_DIAG_CONG
- 1))) {
263 ca_ops
= READ_ONCE(icsk
->icsk_ca_ops
);
265 err
= nla_put_string(skb
, INET_DIAG_CONG
, ca_ops
->name
);
271 handler
->idiag_get_info(sk
, r
, info
);
273 if (ext
& (1 << (INET_DIAG_INFO
- 1)) && handler
->idiag_get_aux
)
274 if (handler
->idiag_get_aux(sk
, net_admin
, skb
) < 0)
277 if (sk
->sk_state
< TCP_TIME_WAIT
) {
278 union tcp_cc_info info
;
283 ca_ops
= READ_ONCE(icsk
->icsk_ca_ops
);
284 if (ca_ops
&& ca_ops
->get_info
)
285 sz
= ca_ops
->get_info(sk
, ext
, &attr
, &info
);
287 if (sz
&& nla_put(skb
, attr
, sz
, &info
) < 0)
291 if (ext
& (1 << (INET_DIAG_CLASS_ID
- 1)) ||
292 ext
& (1 << (INET_DIAG_TCLASS
- 1))) {
295 #ifdef CONFIG_SOCK_CGROUP_DATA
296 classid
= sock_cgroup_classid(&sk
->sk_cgrp_data
);
298 /* Fallback to socket priority if class id isn't set.
299 * Classful qdiscs use it as direct reference to class.
300 * For cgroup2 classid is always zero.
303 classid
= sk
->sk_priority
;
305 if (nla_put_u32(skb
, INET_DIAG_CLASS_ID
, classid
))
314 nlmsg_cancel(skb
, nlh
);
317 EXPORT_SYMBOL_GPL(inet_sk_diag_fill
);
319 static int inet_csk_diag_fill(struct sock
*sk
,
321 const struct inet_diag_req_v2
*req
,
322 struct user_namespace
*user_ns
,
323 u32 portid
, u32 seq
, u16 nlmsg_flags
,
324 const struct nlmsghdr
*unlh
,
327 return inet_sk_diag_fill(sk
, inet_csk(sk
), skb
, req
, user_ns
,
328 portid
, seq
, nlmsg_flags
, unlh
, net_admin
);
331 static int inet_twsk_diag_fill(struct sock
*sk
,
333 u32 portid
, u32 seq
, u16 nlmsg_flags
,
334 const struct nlmsghdr
*unlh
)
336 struct inet_timewait_sock
*tw
= inet_twsk(sk
);
337 struct inet_diag_msg
*r
;
338 struct nlmsghdr
*nlh
;
341 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
347 BUG_ON(tw
->tw_state
!= TCP_TIME_WAIT
);
349 tmo
= tw
->tw_timer
.expires
- jiffies
;
353 inet_diag_msg_common_fill(r
, sk
);
354 r
->idiag_retrans
= 0;
356 r
->idiag_state
= tw
->tw_substate
;
358 r
->idiag_expires
= jiffies_to_msecs(tmo
);
368 static int inet_req_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
369 u32 portid
, u32 seq
, u16 nlmsg_flags
,
370 const struct nlmsghdr
*unlh
, bool net_admin
)
372 struct request_sock
*reqsk
= inet_reqsk(sk
);
373 struct inet_diag_msg
*r
;
374 struct nlmsghdr
*nlh
;
377 nlh
= nlmsg_put(skb
, portid
, seq
, unlh
->nlmsg_type
, sizeof(*r
),
383 inet_diag_msg_common_fill(r
, sk
);
384 r
->idiag_state
= TCP_SYN_RECV
;
386 r
->idiag_retrans
= reqsk
->num_retrans
;
388 BUILD_BUG_ON(offsetof(struct inet_request_sock
, ir_cookie
) !=
389 offsetof(struct sock
, sk_cookie
));
391 tmo
= inet_reqsk(sk
)->rsk_timer
.expires
- jiffies
;
392 r
->idiag_expires
= (tmo
>= 0) ? jiffies_to_msecs(tmo
) : 0;
398 if (net_admin
&& nla_put_u32(skb
, INET_DIAG_MARK
,
399 inet_rsk(reqsk
)->ir_mark
))
406 static int sk_diag_fill(struct sock
*sk
, struct sk_buff
*skb
,
407 const struct inet_diag_req_v2
*r
,
408 struct user_namespace
*user_ns
,
409 u32 portid
, u32 seq
, u16 nlmsg_flags
,
410 const struct nlmsghdr
*unlh
, bool net_admin
)
412 if (sk
->sk_state
== TCP_TIME_WAIT
)
413 return inet_twsk_diag_fill(sk
, skb
, portid
, seq
,
416 if (sk
->sk_state
== TCP_NEW_SYN_RECV
)
417 return inet_req_diag_fill(sk
, skb
, portid
, seq
,
418 nlmsg_flags
, unlh
, net_admin
);
420 return inet_csk_diag_fill(sk
, skb
, r
, user_ns
, portid
, seq
,
421 nlmsg_flags
, unlh
, net_admin
);
424 struct sock
*inet_diag_find_one_icsk(struct net
*net
,
425 struct inet_hashinfo
*hashinfo
,
426 const struct inet_diag_req_v2
*req
)
431 if (req
->sdiag_family
== AF_INET
)
432 sk
= inet_lookup(net
, hashinfo
, NULL
, 0, req
->id
.idiag_dst
[0],
433 req
->id
.idiag_dport
, req
->id
.idiag_src
[0],
434 req
->id
.idiag_sport
, req
->id
.idiag_if
);
435 #if IS_ENABLED(CONFIG_IPV6)
436 else if (req
->sdiag_family
== AF_INET6
) {
437 if (ipv6_addr_v4mapped((struct in6_addr
*)req
->id
.idiag_dst
) &&
438 ipv6_addr_v4mapped((struct in6_addr
*)req
->id
.idiag_src
))
439 sk
= inet_lookup(net
, hashinfo
, NULL
, 0, req
->id
.idiag_dst
[3],
440 req
->id
.idiag_dport
, req
->id
.idiag_src
[3],
441 req
->id
.idiag_sport
, req
->id
.idiag_if
);
443 sk
= inet6_lookup(net
, hashinfo
, NULL
, 0,
444 (struct in6_addr
*)req
->id
.idiag_dst
,
446 (struct in6_addr
*)req
->id
.idiag_src
,
453 return ERR_PTR(-EINVAL
);
457 return ERR_PTR(-ENOENT
);
459 if (sock_diag_check_cookie(sk
, req
->id
.idiag_cookie
)) {
461 return ERR_PTR(-ENOENT
);
466 EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk
);
468 int inet_diag_dump_one_icsk(struct inet_hashinfo
*hashinfo
,
469 struct sk_buff
*in_skb
,
470 const struct nlmsghdr
*nlh
,
471 const struct inet_diag_req_v2
*req
)
473 bool net_admin
= netlink_net_capable(in_skb
, CAP_NET_ADMIN
);
474 struct net
*net
= sock_net(in_skb
->sk
);
479 sk
= inet_diag_find_one_icsk(net
, hashinfo
, req
);
483 rep
= nlmsg_new(inet_sk_attr_size(sk
, req
, net_admin
), GFP_KERNEL
);
489 err
= sk_diag_fill(sk
, rep
, req
,
490 sk_user_ns(NETLINK_CB(in_skb
).sk
),
491 NETLINK_CB(in_skb
).portid
,
492 nlh
->nlmsg_seq
, 0, nlh
, net_admin
);
494 WARN_ON(err
== -EMSGSIZE
);
498 err
= netlink_unicast(net
->diag_nlsk
, rep
, NETLINK_CB(in_skb
).portid
,
509 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk
);
511 static int inet_diag_cmd_exact(int cmd
, struct sk_buff
*in_skb
,
512 const struct nlmsghdr
*nlh
,
513 const struct inet_diag_req_v2
*req
)
515 const struct inet_diag_handler
*handler
;
518 handler
= inet_diag_lock_handler(req
->sdiag_protocol
);
520 err
= PTR_ERR(handler
);
521 else if (cmd
== SOCK_DIAG_BY_FAMILY
)
522 err
= handler
->dump_one(in_skb
, nlh
, req
);
523 else if (cmd
== SOCK_DESTROY
&& handler
->destroy
)
524 err
= handler
->destroy(in_skb
, req
);
527 inet_diag_unlock_handler(handler
);
532 static int bitstring_match(const __be32
*a1
, const __be32
*a2
, int bits
)
534 int words
= bits
>> 5;
539 if (memcmp(a1
, a2
, words
<< 2))
549 mask
= htonl((0xffffffff) << (32 - bits
));
551 if ((w1
^ w2
) & mask
)
558 static int inet_diag_bc_run(const struct nlattr
*_bc
,
559 const struct inet_diag_entry
*entry
)
561 const void *bc
= nla_data(_bc
);
562 int len
= nla_len(_bc
);
566 const struct inet_diag_bc_op
*op
= bc
;
569 case INET_DIAG_BC_NOP
:
571 case INET_DIAG_BC_JMP
:
574 case INET_DIAG_BC_S_EQ
:
575 yes
= entry
->sport
== op
[1].no
;
577 case INET_DIAG_BC_S_GE
:
578 yes
= entry
->sport
>= op
[1].no
;
580 case INET_DIAG_BC_S_LE
:
581 yes
= entry
->sport
<= op
[1].no
;
583 case INET_DIAG_BC_D_EQ
:
584 yes
= entry
->dport
== op
[1].no
;
586 case INET_DIAG_BC_D_GE
:
587 yes
= entry
->dport
>= op
[1].no
;
589 case INET_DIAG_BC_D_LE
:
590 yes
= entry
->dport
<= op
[1].no
;
592 case INET_DIAG_BC_AUTO
:
593 yes
= !(entry
->userlocks
& SOCK_BINDPORT_LOCK
);
595 case INET_DIAG_BC_S_COND
:
596 case INET_DIAG_BC_D_COND
: {
597 const struct inet_diag_hostcond
*cond
;
600 cond
= (const struct inet_diag_hostcond
*)(op
+ 1);
601 if (cond
->port
!= -1 &&
602 cond
->port
!= (op
->code
== INET_DIAG_BC_S_COND
?
603 entry
->sport
: entry
->dport
)) {
608 if (op
->code
== INET_DIAG_BC_S_COND
)
613 if (cond
->family
!= AF_UNSPEC
&&
614 cond
->family
!= entry
->family
) {
615 if (entry
->family
== AF_INET6
&&
616 cond
->family
== AF_INET
) {
617 if (addr
[0] == 0 && addr
[1] == 0 &&
618 addr
[2] == htonl(0xffff) &&
619 bitstring_match(addr
+ 3,
628 if (cond
->prefix_len
== 0)
630 if (bitstring_match(addr
, cond
->addr
,
636 case INET_DIAG_BC_DEV_COND
: {
639 ifindex
= *((const u32
*)(op
+ 1));
640 if (ifindex
!= entry
->ifindex
)
644 case INET_DIAG_BC_MARK_COND
: {
645 struct inet_diag_markcond
*cond
;
647 cond
= (struct inet_diag_markcond
*)(op
+ 1);
648 if ((entry
->mark
& cond
->mask
) != cond
->mark
)
665 /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
667 static void entry_fill_addrs(struct inet_diag_entry
*entry
,
668 const struct sock
*sk
)
670 #if IS_ENABLED(CONFIG_IPV6)
671 if (sk
->sk_family
== AF_INET6
) {
672 entry
->saddr
= sk
->sk_v6_rcv_saddr
.s6_addr32
;
673 entry
->daddr
= sk
->sk_v6_daddr
.s6_addr32
;
677 entry
->saddr
= &sk
->sk_rcv_saddr
;
678 entry
->daddr
= &sk
->sk_daddr
;
682 int inet_diag_bc_sk(const struct nlattr
*bc
, struct sock
*sk
)
684 struct inet_sock
*inet
= inet_sk(sk
);
685 struct inet_diag_entry entry
;
690 entry
.family
= sk
->sk_family
;
691 entry_fill_addrs(&entry
, sk
);
692 entry
.sport
= inet
->inet_num
;
693 entry
.dport
= ntohs(inet
->inet_dport
);
694 entry
.ifindex
= sk
->sk_bound_dev_if
;
695 entry
.userlocks
= sk_fullsock(sk
) ? sk
->sk_userlocks
: 0;
697 entry
.mark
= sk
->sk_mark
;
698 else if (sk
->sk_state
== TCP_NEW_SYN_RECV
)
699 entry
.mark
= inet_rsk(inet_reqsk(sk
))->ir_mark
;
703 return inet_diag_bc_run(bc
, &entry
);
705 EXPORT_SYMBOL_GPL(inet_diag_bc_sk
);
707 static int valid_cc(const void *bc
, int len
, int cc
)
710 const struct inet_diag_bc_op
*op
= bc
;
716 if (op
->yes
< 4 || op
->yes
& 3)
724 /* data is u32 ifindex */
725 static bool valid_devcond(const struct inet_diag_bc_op
*op
, int len
,
728 /* Check ifindex space. */
729 *min_len
+= sizeof(u32
);
735 /* Validate an inet_diag_hostcond. */
736 static bool valid_hostcond(const struct inet_diag_bc_op
*op
, int len
,
739 struct inet_diag_hostcond
*cond
;
742 /* Check hostcond space. */
743 *min_len
+= sizeof(struct inet_diag_hostcond
);
746 cond
= (struct inet_diag_hostcond
*)(op
+ 1);
748 /* Check address family and address length. */
749 switch (cond
->family
) {
754 addr_len
= sizeof(struct in_addr
);
757 addr_len
= sizeof(struct in6_addr
);
762 *min_len
+= addr_len
;
766 /* Check prefix length (in bits) vs address length (in bytes). */
767 if (cond
->prefix_len
> 8 * addr_len
)
773 /* Validate a port comparison operator. */
774 static bool valid_port_comparison(const struct inet_diag_bc_op
*op
,
775 int len
, int *min_len
)
777 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
778 *min_len
+= sizeof(struct inet_diag_bc_op
);
784 static bool valid_markcond(const struct inet_diag_bc_op
*op
, int len
,
787 *min_len
+= sizeof(struct inet_diag_markcond
);
788 return len
>= *min_len
;
791 static int inet_diag_bc_audit(const struct nlattr
*attr
,
792 const struct sk_buff
*skb
)
794 bool net_admin
= netlink_net_capable(skb
, CAP_NET_ADMIN
);
795 const void *bytecode
, *bc
;
796 int bytecode_len
, len
;
798 if (!attr
|| nla_len(attr
) < sizeof(struct inet_diag_bc_op
))
801 bytecode
= bc
= nla_data(attr
);
802 len
= bytecode_len
= nla_len(attr
);
805 int min_len
= sizeof(struct inet_diag_bc_op
);
806 const struct inet_diag_bc_op
*op
= bc
;
809 case INET_DIAG_BC_S_COND
:
810 case INET_DIAG_BC_D_COND
:
811 if (!valid_hostcond(bc
, len
, &min_len
))
814 case INET_DIAG_BC_DEV_COND
:
815 if (!valid_devcond(bc
, len
, &min_len
))
818 case INET_DIAG_BC_S_EQ
:
819 case INET_DIAG_BC_S_GE
:
820 case INET_DIAG_BC_S_LE
:
821 case INET_DIAG_BC_D_EQ
:
822 case INET_DIAG_BC_D_GE
:
823 case INET_DIAG_BC_D_LE
:
824 if (!valid_port_comparison(bc
, len
, &min_len
))
827 case INET_DIAG_BC_MARK_COND
:
830 if (!valid_markcond(bc
, len
, &min_len
))
833 case INET_DIAG_BC_AUTO
:
834 case INET_DIAG_BC_JMP
:
835 case INET_DIAG_BC_NOP
:
841 if (op
->code
!= INET_DIAG_BC_NOP
) {
842 if (op
->no
< min_len
|| op
->no
> len
+ 4 || op
->no
& 3)
845 !valid_cc(bytecode
, bytecode_len
, len
- op
->no
))
849 if (op
->yes
< min_len
|| op
->yes
> len
+ 4 || op
->yes
& 3)
854 return len
== 0 ? 0 : -EINVAL
;
857 static int inet_csk_diag_dump(struct sock
*sk
,
859 struct netlink_callback
*cb
,
860 const struct inet_diag_req_v2
*r
,
861 const struct nlattr
*bc
,
864 if (!inet_diag_bc_sk(bc
, sk
))
867 return inet_csk_diag_fill(sk
, skb
, r
,
868 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
869 NETLINK_CB(cb
->skb
).portid
,
870 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
, cb
->nlh
,
874 static void twsk_build_assert(void)
876 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_family
) !=
877 offsetof(struct sock
, sk_family
));
879 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_num
) !=
880 offsetof(struct inet_sock
, inet_num
));
882 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_dport
) !=
883 offsetof(struct inet_sock
, inet_dport
));
885 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_rcv_saddr
) !=
886 offsetof(struct inet_sock
, inet_rcv_saddr
));
888 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_daddr
) !=
889 offsetof(struct inet_sock
, inet_daddr
));
891 #if IS_ENABLED(CONFIG_IPV6)
892 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_v6_rcv_saddr
) !=
893 offsetof(struct sock
, sk_v6_rcv_saddr
));
895 BUILD_BUG_ON(offsetof(struct inet_timewait_sock
, tw_v6_daddr
) !=
896 offsetof(struct sock
, sk_v6_daddr
));
900 void inet_diag_dump_icsk(struct inet_hashinfo
*hashinfo
, struct sk_buff
*skb
,
901 struct netlink_callback
*cb
,
902 const struct inet_diag_req_v2
*r
, struct nlattr
*bc
)
904 bool net_admin
= netlink_net_capable(cb
->skb
, CAP_NET_ADMIN
);
905 struct net
*net
= sock_net(skb
->sk
);
906 u32 idiag_states
= r
->idiag_states
;
907 int i
, num
, s_i
, s_num
;
910 if (idiag_states
& TCPF_SYN_RECV
)
911 idiag_states
|= TCPF_NEW_SYN_RECV
;
913 s_num
= num
= cb
->args
[2];
915 if (cb
->args
[0] == 0) {
916 if (!(idiag_states
& TCPF_LISTEN
) || r
->id
.idiag_dport
)
919 for (i
= s_i
; i
< INET_LHTABLE_SIZE
; i
++) {
920 struct inet_listen_hashbucket
*ilb
;
923 ilb
= &hashinfo
->listening_hash
[i
];
924 spin_lock(&ilb
->lock
);
925 sk_for_each(sk
, &ilb
->head
) {
926 struct inet_sock
*inet
= inet_sk(sk
);
928 if (!net_eq(sock_net(sk
), net
))
936 if (r
->sdiag_family
!= AF_UNSPEC
&&
937 sk
->sk_family
!= r
->sdiag_family
)
940 if (r
->id
.idiag_sport
!= inet
->inet_sport
&&
944 if (inet_csk_diag_dump(sk
, skb
, cb
, r
,
945 bc
, net_admin
) < 0) {
946 spin_unlock(&ilb
->lock
);
953 spin_unlock(&ilb
->lock
);
959 s_i
= num
= s_num
= 0;
962 if (!(idiag_states
& ~TCPF_LISTEN
))
966 for (i
= s_i
; i
<= hashinfo
->ehash_mask
; i
++) {
967 struct inet_ehash_bucket
*head
= &hashinfo
->ehash
[i
];
968 spinlock_t
*lock
= inet_ehash_lockp(hashinfo
, i
);
969 struct hlist_nulls_node
*node
;
970 struct sock
*sk_arr
[SKARR_SZ
];
971 int num_arr
[SKARR_SZ
];
974 if (hlist_nulls_empty(&head
->chain
))
984 sk_nulls_for_each(sk
, node
, &head
->chain
) {
987 if (!net_eq(sock_net(sk
), net
))
991 state
= (sk
->sk_state
== TCP_TIME_WAIT
) ?
992 inet_twsk(sk
)->tw_substate
: sk
->sk_state
;
993 if (!(idiag_states
& (1 << state
)))
995 if (r
->sdiag_family
!= AF_UNSPEC
&&
996 sk
->sk_family
!= r
->sdiag_family
)
998 if (r
->id
.idiag_sport
!= htons(sk
->sk_num
) &&
1001 if (r
->id
.idiag_dport
!= sk
->sk_dport
&&
1004 twsk_build_assert();
1006 if (!inet_diag_bc_sk(bc
, sk
))
1009 if (!refcount_inc_not_zero(&sk
->sk_refcnt
))
1012 num_arr
[accum
] = num
;
1014 if (++accum
== SKARR_SZ
)
1019 spin_unlock_bh(lock
);
1021 for (idx
= 0; idx
< accum
; idx
++) {
1023 res
= sk_diag_fill(sk_arr
[idx
], skb
, r
,
1024 sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
1025 NETLINK_CB(cb
->skb
).portid
,
1026 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1027 cb
->nlh
, net_admin
);
1031 sock_gen_put(sk_arr
[idx
]);
1036 if (accum
== SKARR_SZ
) {
1048 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk
);
1050 static int __inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
1051 const struct inet_diag_req_v2
*r
,
1054 const struct inet_diag_handler
*handler
;
1057 handler
= inet_diag_lock_handler(r
->sdiag_protocol
);
1058 if (!IS_ERR(handler
))
1059 handler
->dump(skb
, cb
, r
, bc
);
1061 err
= PTR_ERR(handler
);
1062 inet_diag_unlock_handler(handler
);
1064 return err
? : skb
->len
;
1067 static int inet_diag_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1069 int hdrlen
= sizeof(struct inet_diag_req_v2
);
1070 struct nlattr
*bc
= NULL
;
1072 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
1073 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
1075 return __inet_diag_dump(skb
, cb
, nlmsg_data(cb
->nlh
), bc
);
1078 static int inet_diag_type2proto(int type
)
1081 case TCPDIAG_GETSOCK
:
1083 case DCCPDIAG_GETSOCK
:
1084 return IPPROTO_DCCP
;
1090 static int inet_diag_dump_compat(struct sk_buff
*skb
,
1091 struct netlink_callback
*cb
)
1093 struct inet_diag_req
*rc
= nlmsg_data(cb
->nlh
);
1094 int hdrlen
= sizeof(struct inet_diag_req
);
1095 struct inet_diag_req_v2 req
;
1096 struct nlattr
*bc
= NULL
;
1098 req
.sdiag_family
= AF_UNSPEC
; /* compatibility */
1099 req
.sdiag_protocol
= inet_diag_type2proto(cb
->nlh
->nlmsg_type
);
1100 req
.idiag_ext
= rc
->idiag_ext
;
1101 req
.idiag_states
= rc
->idiag_states
;
1104 if (nlmsg_attrlen(cb
->nlh
, hdrlen
))
1105 bc
= nlmsg_find_attr(cb
->nlh
, hdrlen
, INET_DIAG_REQ_BYTECODE
);
1107 return __inet_diag_dump(skb
, cb
, &req
, bc
);
1110 static int inet_diag_get_exact_compat(struct sk_buff
*in_skb
,
1111 const struct nlmsghdr
*nlh
)
1113 struct inet_diag_req
*rc
= nlmsg_data(nlh
);
1114 struct inet_diag_req_v2 req
;
1116 req
.sdiag_family
= rc
->idiag_family
;
1117 req
.sdiag_protocol
= inet_diag_type2proto(nlh
->nlmsg_type
);
1118 req
.idiag_ext
= rc
->idiag_ext
;
1119 req
.idiag_states
= rc
->idiag_states
;
1122 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY
, in_skb
, nlh
, &req
);
1125 static int inet_diag_rcv_msg_compat(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1127 int hdrlen
= sizeof(struct inet_diag_req
);
1128 struct net
*net
= sock_net(skb
->sk
);
1130 if (nlh
->nlmsg_type
>= INET_DIAG_GETSOCK_MAX
||
1131 nlmsg_len(nlh
) < hdrlen
)
1134 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1135 if (nlmsg_attrlen(nlh
, hdrlen
)) {
1136 struct nlattr
*attr
;
1139 attr
= nlmsg_find_attr(nlh
, hdrlen
,
1140 INET_DIAG_REQ_BYTECODE
);
1141 err
= inet_diag_bc_audit(attr
, skb
);
1146 struct netlink_dump_control c
= {
1147 .dump
= inet_diag_dump_compat
,
1149 return netlink_dump_start(net
->diag_nlsk
, skb
, nlh
, &c
);
1153 return inet_diag_get_exact_compat(skb
, nlh
);
1156 static int inet_diag_handler_cmd(struct sk_buff
*skb
, struct nlmsghdr
*h
)
1158 int hdrlen
= sizeof(struct inet_diag_req_v2
);
1159 struct net
*net
= sock_net(skb
->sk
);
1161 if (nlmsg_len(h
) < hdrlen
)
1164 if (h
->nlmsg_type
== SOCK_DIAG_BY_FAMILY
&&
1165 h
->nlmsg_flags
& NLM_F_DUMP
) {
1166 if (nlmsg_attrlen(h
, hdrlen
)) {
1167 struct nlattr
*attr
;
1170 attr
= nlmsg_find_attr(h
, hdrlen
,
1171 INET_DIAG_REQ_BYTECODE
);
1172 err
= inet_diag_bc_audit(attr
, skb
);
1177 struct netlink_dump_control c
= {
1178 .dump
= inet_diag_dump
,
1180 return netlink_dump_start(net
->diag_nlsk
, skb
, h
, &c
);
1184 return inet_diag_cmd_exact(h
->nlmsg_type
, skb
, h
, nlmsg_data(h
));
1188 int inet_diag_handler_get_info(struct sk_buff
*skb
, struct sock
*sk
)
1190 const struct inet_diag_handler
*handler
;
1191 struct nlmsghdr
*nlh
;
1192 struct nlattr
*attr
;
1193 struct inet_diag_msg
*r
;
1197 nlh
= nlmsg_put(skb
, 0, 0, SOCK_DIAG_BY_FAMILY
, sizeof(*r
), 0);
1201 r
= nlmsg_data(nlh
);
1202 memset(r
, 0, sizeof(*r
));
1203 inet_diag_msg_common_fill(r
, sk
);
1204 if (sk
->sk_type
== SOCK_DGRAM
|| sk
->sk_type
== SOCK_STREAM
)
1205 r
->id
.idiag_sport
= inet_sk(sk
)->inet_sport
;
1206 r
->idiag_state
= sk
->sk_state
;
1208 if ((err
= nla_put_u8(skb
, INET_DIAG_PROTOCOL
, sk
->sk_protocol
))) {
1209 nlmsg_cancel(skb
, nlh
);
1213 handler
= inet_diag_lock_handler(sk
->sk_protocol
);
1214 if (IS_ERR(handler
)) {
1215 inet_diag_unlock_handler(handler
);
1216 nlmsg_cancel(skb
, nlh
);
1217 return PTR_ERR(handler
);
1220 attr
= handler
->idiag_info_size
1221 ? nla_reserve_64bit(skb
, INET_DIAG_INFO
,
1222 handler
->idiag_info_size
,
1226 info
= nla_data(attr
);
1228 handler
->idiag_get_info(sk
, r
, info
);
1229 inet_diag_unlock_handler(handler
);
1231 nlmsg_end(skb
, nlh
);
1235 static const struct sock_diag_handler inet_diag_handler
= {
1237 .dump
= inet_diag_handler_cmd
,
1238 .get_info
= inet_diag_handler_get_info
,
1239 .destroy
= inet_diag_handler_cmd
,
1242 static const struct sock_diag_handler inet6_diag_handler
= {
1244 .dump
= inet_diag_handler_cmd
,
1245 .get_info
= inet_diag_handler_get_info
,
1246 .destroy
= inet_diag_handler_cmd
,
1249 int inet_diag_register(const struct inet_diag_handler
*h
)
1251 const __u16 type
= h
->idiag_type
;
1254 if (type
>= IPPROTO_MAX
)
1257 mutex_lock(&inet_diag_table_mutex
);
1259 if (!inet_diag_table
[type
]) {
1260 inet_diag_table
[type
] = h
;
1263 mutex_unlock(&inet_diag_table_mutex
);
1267 EXPORT_SYMBOL_GPL(inet_diag_register
);
1269 void inet_diag_unregister(const struct inet_diag_handler
*h
)
1271 const __u16 type
= h
->idiag_type
;
1273 if (type
>= IPPROTO_MAX
)
1276 mutex_lock(&inet_diag_table_mutex
);
1277 inet_diag_table
[type
] = NULL
;
1278 mutex_unlock(&inet_diag_table_mutex
);
1280 EXPORT_SYMBOL_GPL(inet_diag_unregister
);
1282 static int __init
inet_diag_init(void)
1284 const int inet_diag_table_size
= (IPPROTO_MAX
*
1285 sizeof(struct inet_diag_handler
*));
1288 inet_diag_table
= kzalloc(inet_diag_table_size
, GFP_KERNEL
);
1289 if (!inet_diag_table
)
1292 err
= sock_diag_register(&inet_diag_handler
);
1296 err
= sock_diag_register(&inet6_diag_handler
);
1300 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat
);
1305 sock_diag_unregister(&inet_diag_handler
);
1307 kfree(inet_diag_table
);
1311 static void __exit
inet_diag_exit(void)
1313 sock_diag_unregister(&inet6_diag_handler
);
1314 sock_diag_unregister(&inet_diag_handler
);
1315 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat
);
1316 kfree(inet_diag_table
);
1319 module_init(inet_diag_init
);
1320 module_exit(inet_diag_exit
);
1321 MODULE_LICENSE("GPL");
1322 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 2 /* AF_INET */);
1323 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK
, NETLINK_SOCK_DIAG
, 10 /* AF_INET6 */);