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 10struct sk_buff; 11struct nlmsghdr; 12struct sock; 13 14struct 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 21int sock_diag_register(const struct sock_diag_handler *h); 22void sock_diag_unregister(const struct sock_diag_handler *h); 23 24void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh)); 25void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh)); 26 27int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie); 28void sock_diag_save_cookie(struct sock *sk, __u32 *cookie); 29 30int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr); 31int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk, 32 struct sk_buff *skb, int attrtype); 33 34static inline 35enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk) 36{ 37 switch (sk->sk_family) { 38 case AF_INET: 39 switch (sk->sk_protocol) { 40 case IPPROTO_TCP: 41 return SKNLGRP_INET_TCP_DESTROY; 42 case IPPROTO_UDP: 43 return SKNLGRP_INET_UDP_DESTROY; 44 default: 45 return SKNLGRP_NONE; 46 } 47 case AF_INET6: 48 switch (sk->sk_protocol) { 49 case IPPROTO_TCP: 50 return SKNLGRP_INET6_TCP_DESTROY; 51 case IPPROTO_UDP: 52 return SKNLGRP_INET6_UDP_DESTROY; 53 default: 54 return SKNLGRP_NONE; 55 } 56 default: 57 return SKNLGRP_NONE; 58 } 59} 60 61static inline 62bool sock_diag_has_destroy_listeners(const struct sock *sk) 63{ 64 const struct net *n = sock_net(sk); 65 const enum sknetlink_groups group = sock_diag_destroy_group(sk); 66 67 return group != SKNLGRP_NONE && n->diag_nlsk && 68 netlink_has_listeners(n->diag_nlsk, group); 69} 70void sock_diag_broadcast_destroy(struct sock *sk); 71 72int sock_diag_destroy(struct sock *sk, int err); 73#endif 74