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 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