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 int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie); 30 void sock_diag_save_cookie(struct sock *sk, __u32 *cookie); 31 32 int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr); 33 int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk, 34 struct sk_buff *skb, int attrtype); 35 36 static inline 37 enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk) 38 { 39 switch (sk->sk_family) { 40 case AF_INET: 41 if (sk->sk_type == SOCK_RAW) 42 return SKNLGRP_NONE; 43 44 switch (sk->sk_protocol) { 45 case IPPROTO_TCP: 46 return SKNLGRP_INET_TCP_DESTROY; 47 case IPPROTO_UDP: 48 return SKNLGRP_INET_UDP_DESTROY; 49 default: 50 return SKNLGRP_NONE; 51 } 52 case AF_INET6: 53 if (sk->sk_type == SOCK_RAW) 54 return SKNLGRP_NONE; 55 56 switch (sk->sk_protocol) { 57 case IPPROTO_TCP: 58 return SKNLGRP_INET6_TCP_DESTROY; 59 case IPPROTO_UDP: 60 return SKNLGRP_INET6_UDP_DESTROY; 61 default: 62 return SKNLGRP_NONE; 63 } 64 default: 65 return SKNLGRP_NONE; 66 } 67 } 68 69 static inline 70 bool sock_diag_has_destroy_listeners(const struct sock *sk) 71 { 72 const struct net *n = sock_net(sk); 73 const enum sknetlink_groups group = sock_diag_destroy_group(sk); 74 75 return group != SKNLGRP_NONE && n->diag_nlsk && 76 netlink_has_listeners(n->diag_nlsk, group); 77 } 78 void sock_diag_broadcast_destroy(struct sock *sk); 79 80 int sock_diag_destroy(struct sock *sk, int err); 81 #endif 82