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                 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