include/net/ping.h

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Definitions for the "ping" module.
   7  *
   8  *              This program is free software; you can redistribute it and/or
   9  *              modify it under the terms of the GNU General Public License
  10  *              as published by the Free Software Foundation; either version
  11  *              2 of the License, or (at your option) any later version.
  12  */
  13 #ifndef _PING_H
  14 #define _PING_H
  15
  16 #include <net/icmp.h>
  17 #include <net/netns/hash.h>
  18
  19 /* PING_HTABLE_SIZE must be power of 2 */
  20 #define PING_HTABLE_SIZE        64
  21 #define PING_HTABLE_MASK        (PING_HTABLE_SIZE-1)
  22
  23 #define ping_portaddr_for_each_entry(__sk, node, list) \
  24         hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
  25
  26 /*
  27  * gid_t is either uint or ushort.  We want to pass it to
  28  * proc_dointvec_minmax(), so it must not be larger than MAX_INT
  29  */
  30 #define GID_T_MAX (((gid_t)~0U) >> 1)
  31
  32 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
  33 struct pingv6_ops {
  34         int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
  35                                int *addr_len);
  36         int (*ip6_datagram_recv_ctl)(struct sock *sk, struct msghdr *msg,
  37                                      struct sk_buff *skb);
  38         int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
  39         void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
  40                                 __be16 port, u32 info, u8 *payload);
  41         int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
  42                              const struct net_device *dev, int strict);
  43 };
  44
  45 struct ping_table {
  46         struct hlist_nulls_head hash[PING_HTABLE_SIZE];
  47         rwlock_t                lock;
  48 };
  49
  50 struct ping_iter_state {
  51         struct seq_net_private  p;
  52         int                     bucket;
  53         sa_family_t             family;
  54 };
  55
  56 extern struct proto ping_prot;
  57 extern struct ping_table ping_table;
  58 #if IS_ENABLED(CONFIG_IPV6)
  59 extern struct pingv6_ops pingv6_ops;
  60 #endif
  61
  62 struct pingfakehdr {
  63         struct icmphdr icmph;
  64         struct iovec *iov;
  65         sa_family_t family;
  66         __wsum wcheck;
  67 };
  68
  69 int  ping_get_port(struct sock *sk, unsigned short ident);
  70 void ping_hash(struct sock *sk);
  71 void ping_unhash(struct sock *sk);
  72
  73 int  ping_init_sock(struct sock *sk);
  74 void ping_close(struct sock *sk, long timeout);
  75 int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
  76 void ping_err(struct sk_buff *skb, int offset, u32 info);
  77 int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
  78                   struct sk_buff *);
  79
  80 int  ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
  81                   size_t len, int noblock, int flags, int *addr_len);
  82 int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
  83                          void *user_icmph, size_t icmph_len);
  84 int  ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
  85                      size_t len);
  86 int  ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
  87                      size_t len);
  88 int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
  89 void ping_rcv(struct sk_buff *skb);
  90
  91 #ifdef CONFIG_PROC_FS
  92 struct ping_seq_afinfo {
  93         char                            *name;
  94         sa_family_t                     family;
  95         const struct file_operations    *seq_fops;
  96         const struct seq_operations     seq_ops;
  97 };
  98
  99 extern const struct file_operations ping_seq_fops;
 100
 101 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
 102 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
 103 void ping_seq_stop(struct seq_file *seq, void *v);
 104 int ping_proc_register(struct net *net, struct ping_seq_afinfo *afinfo);
 105 void ping_proc_unregister(struct net *net, struct ping_seq_afinfo *afinfo);
 106
 107 int __init ping_proc_init(void);
 108 void ping_proc_exit(void);
 109 #endif
 110
 111 void __init ping_init(void);
 112 int  __init pingv6_init(void);
 113 void pingv6_exit(void);
 114
 115 #endif /* _PING_H */