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 u64 sock_gen_cookie(struct sock *sk); 28 int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie); 29 void sock_diag_save_cookie(struct sock *sk, __u32 *cookie); 30 31 int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr); 32 int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk, 33 struct sk_buff *skb, int attrtype); 34 35 static inline 36 enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk) 37 { 38 switch (sk->sk_family) { 39 case AF_INET: 40 if (sk->sk_type == SOCK_RAW) 41 return SKNLGRP_NONE; 42 43 switch (sk->sk_protocol) { 44 case IPPROTO_TCP: 45 return SKNLGRP_INET_TCP_DESTROY; 46 case IPPROTO_UDP: 47 return SKNLGRP_INET_UDP_DESTROY; 48 default: 49 return SKNLGRP_NONE; 50 } 51 case AF_INET6: 52 if (sk->sk_type == SOCK_RAW) 53 return SKNLGRP_NONE; 54 55 switch (sk->sk_protocol) { 56 case IPPROTO_TCP: 57 return SKNLGRP_INET6_TCP_DESTROY; 58 case IPPROTO_UDP: 59 return SKNLGRP_INET6_UDP_DESTROY; 60 default: 61 return SKNLGRP_NONE; 62 } 63 default: 64 return SKNLGRP_NONE; 65 } 66 } 67 68 static inline 69 bool sock_diag_has_destroy_listeners(const struct sock *sk) 70 { 71 const struct net *n = sock_net(sk); 72 const enum sknetlink_groups group = sock_diag_destroy_group(sk); 73 74 return group != SKNLGRP_NONE && n->diag_nlsk && 75 netlink_has_listeners(n->diag_nlsk, group); 76 } 77 void sock_diag_broadcast_destroy(struct sock *sk); 78 79 int sock_diag_destroy(struct sock *sk, int err); 80 #endif 81