include/linux/sock_diag.h

   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                 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
  61 static inline
  62 bool 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 }
  70 void sock_diag_broadcast_destroy(struct sock *sk);
  71
  72 int sock_diag_destroy(struct sock *sk, int err);
  73 #endif