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 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 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