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 struct module *owner;
17 __u8 family;
18 int (*dump)(struct sk_buff *skb, struct nlmsghdr *nlh);
19 int (*get_info)(struct sk_buff *skb, struct sock *sk);
20 int (*destroy)(struct sk_buff *skb, struct nlmsghdr *nlh);
21 };
22
23 int sock_diag_register(const struct sock_diag_handler *h);
24 void sock_diag_unregister(const struct sock_diag_handler *h);
25
26 struct sock_diag_inet_compat {
27 struct module *owner;
28 int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh);
29 };
30
31 void sock_diag_register_inet_compat(const struct sock_diag_inet_compat *ptr);
32 void sock_diag_unregister_inet_compat(const struct sock_diag_inet_compat *ptr);
33
34 u64 __sock_gen_cookie(struct sock *sk);
35
36 static inline u64 sock_gen_cookie(struct sock *sk)
37 {
38 u64 cookie;
39
40 preempt_disable();
41 cookie = __sock_gen_cookie(sk);
42 preempt_enable();
43
44 return cookie;
45 }
46
47 int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie);
48 void sock_diag_save_cookie(struct sock *sk, __u32 *cookie);
49
50 int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr);
51 int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
52 struct sk_buff *skb, int attrtype);
53
54 static inline
55 enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk)
56 {
57 switch (sk->sk_family) {
58 case AF_INET:
59 if (sk->sk_type == SOCK_RAW)
60 return SKNLGRP_NONE;
61
62 switch (sk->sk_protocol) {
63 case IPPROTO_TCP:
64 return SKNLGRP_INET_TCP_DESTROY;
65 case IPPROTO_UDP:
66 return SKNLGRP_INET_UDP_DESTROY;
67 default:
68 return SKNLGRP_NONE;
69 }
70 case AF_INET6:
71 if (sk->sk_type == SOCK_RAW)
72 return SKNLGRP_NONE;
73
74 switch (sk->sk_protocol) {
75 case IPPROTO_TCP:
76 return SKNLGRP_INET6_TCP_DESTROY;
77 case IPPROTO_UDP:
78 return SKNLGRP_INET6_UDP_DESTROY;
79 default:
80 return SKNLGRP_NONE;
81 }
82 default:
83 return SKNLGRP_NONE;
84 }
85 }
86
87 static inline
88 bool sock_diag_has_destroy_listeners(const struct sock *sk)
89 {
90 const struct net *n = sock_net(sk);
91 const enum sknetlink_groups group = sock_diag_destroy_group(sk);
92
93 return group != SKNLGRP_NONE && n->diag_nlsk &&
94 netlink_has_listeners(n->diag_nlsk, group);
95 }
96 void sock_diag_broadcast_destroy(struct sock *sk);
97
98 int sock_diag_destroy(struct sock *sk, int err);
99 #endif
100
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.