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 };
  19
  20 int sock_diag_register(const struct sock_diag_handler *h);
  21 void sock_diag_unregister(const struct sock_diag_handler *h);
  22
  23 void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
  24 void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
  25
  26 int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie);
  27 void sock_diag_save_cookie(struct sock *sk, __u32 *cookie);
  28
  29 int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr);
  30 int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
  31                              struct sk_buff *skb, int attrtype);
  32
  33 static inline
  34 enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk)
  35 {
  36         switch (sk->sk_family) {
  37         case AF_INET:
  38                 switch (sk->sk_protocol) {
  39                 case IPPROTO_TCP:
  40                         return SKNLGRP_INET_TCP_DESTROY;
  41                 case IPPROTO_UDP:
  42                         return SKNLGRP_INET_UDP_DESTROY;
  43                 default:
  44                         return SKNLGRP_NONE;
  45                 }
  46         case AF_INET6:
  47                 switch (sk->sk_protocol) {
  48                 case IPPROTO_TCP:
  49                         return SKNLGRP_INET6_TCP_DESTROY;
  50                 case IPPROTO_UDP:
  51                         return SKNLGRP_INET6_UDP_DESTROY;
  52                 default:
  53                         return SKNLGRP_NONE;
  54                 }
  55         default:
  56                 return SKNLGRP_NONE;
  57         }
  58 }
  59
  60 static inline
  61 bool sock_diag_has_destroy_listeners(const struct sock *sk)
  62 {
  63         const struct net *n = sock_net(sk);
  64         const enum sknetlink_groups group = sock_diag_destroy_group(sk);
  65
  66         return group != SKNLGRP_NONE && n->diag_nlsk &&
  67                 netlink_has_listeners(n->diag_nlsk, group);
  68 }
  69 void sock_diag_broadcast_destroy(struct sock *sk);
  70
  71 #endif