1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __SOCK_DIAG_H__ |
3 | #define __SOCK_DIAG_H__ |
4 | |
5 | #include <linux/netlink.h> |
6 | #include <linux/user_namespace.h> |
7 | #include <net/net_namespace.h> |
8 | #include <net/sock.h> |
9 | #include <uapi/linux/sock_diag.h> |
10 | |
11 | struct sk_buff; |
12 | struct nlmsghdr; |
13 | struct sock; |
14 | |
15 | struct sock_diag_handler { |
16 | __u8 family; |
17 | int (*dump)(struct sk_buff *skb, struct nlmsghdr *nlh); |
18 | int (*get_info)(struct sk_buff *skb, struct sock *sk); |
19 | int (*destroy)(struct sk_buff *skb, struct nlmsghdr *nlh); |
20 | }; |
21 | |
22 | int sock_diag_register(const struct sock_diag_handler *h); |
23 | void sock_diag_unregister(const struct sock_diag_handler *h); |
24 | |
25 | void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh)); |
26 | void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh)); |
27 | |
28 | u64 __sock_gen_cookie(struct sock *sk); |
29 | |
30 | static inline u64 sock_gen_cookie(struct sock *sk) |
31 | { |
32 | u64 cookie; |
33 | |
34 | preempt_disable(); |
35 | cookie = __sock_gen_cookie(sk); |
36 | preempt_enable(); |
37 | |
38 | return cookie; |
39 | } |
40 | |
41 | int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie); |
42 | void sock_diag_save_cookie(struct sock *sk, __u32 *cookie); |
43 | |
44 | int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr); |
45 | int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk, |
46 | struct sk_buff *skb, int attrtype); |
47 | |
48 | static inline |
49 | enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk) |
50 | { |
51 | switch (sk->sk_family) { |
52 | case AF_INET: |
53 | if (sk->sk_type == SOCK_RAW) |
54 | return SKNLGRP_NONE; |
55 | |
56 | switch (sk->sk_protocol) { |
57 | case IPPROTO_TCP: |
58 | return SKNLGRP_INET_TCP_DESTROY; |
59 | case IPPROTO_UDP: |
60 | return SKNLGRP_INET_UDP_DESTROY; |
61 | default: |
62 | return SKNLGRP_NONE; |
63 | } |
64 | case AF_INET6: |
65 | if (sk->sk_type == SOCK_RAW) |
66 | return SKNLGRP_NONE; |
67 | |
68 | switch (sk->sk_protocol) { |
69 | case IPPROTO_TCP: |
70 | return SKNLGRP_INET6_TCP_DESTROY; |
71 | case IPPROTO_UDP: |
72 | return SKNLGRP_INET6_UDP_DESTROY; |
73 | default: |
74 | return SKNLGRP_NONE; |
75 | } |
76 | default: |
77 | return SKNLGRP_NONE; |
78 | } |
79 | } |
80 | |
81 | static inline |
82 | bool sock_diag_has_destroy_listeners(const struct sock *sk) |
83 | { |
84 | const struct net *n = sock_net(sk); |
85 | const enum sknetlink_groups group = sock_diag_destroy_group(sk); |
86 | |
87 | return group != SKNLGRP_NONE && n->diag_nlsk && |
88 | netlink_has_listeners(sk: n->diag_nlsk, group); |
89 | } |
90 | void sock_diag_broadcast_destroy(struct sock *sk); |
91 | |
92 | int sock_diag_destroy(struct sock *sk, int err); |
93 | #endif |
94 | |