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