include/net/ping.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   4  *              operating system.  INET is implemented using the  BSD Socket
   5  *              interface as the means of communication with the user level.
   6  *
   7  *              Definitions for the "ping" module.
   8  */
   9 #ifndef _PING_H
  10 #define _PING_H
  11
  12 #include <net/icmp.h>
  13 #include <net/netns/hash.h>
  14
  15 /* PING_HTABLE_SIZE must be power of 2 */
  16 #define PING_HTABLE_SIZE        64
  17 #define PING_HTABLE_MASK        (PING_HTABLE_SIZE-1)
  18
  19 #define GID_T_MAX (((gid_t)~0U) - 1)
  20
  21 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
  22 struct pingv6_ops {
  23         int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
  24                                int *addr_len);
  25         void (*ip6_datagram_recv_common_ctl)(struct sock *sk,
  26                                              struct msghdr *msg,
  27                                              struct sk_buff *skb);
  28         void (*ip6_datagram_recv_specific_ctl)(struct sock *sk,
  29                                                struct msghdr *msg,
  30                                                struct sk_buff *skb);
  31         int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
  32         void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
  33                                 __be16 port, u32 info, u8 *payload);
  34         int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
  35                              const struct net_device *dev, int strict);
  36 };
  37
  38 struct ping_iter_state {
  39         struct seq_net_private  p;
  40         int                     bucket;
  41         sa_family_t             family;
  42 };
  43
  44 extern struct proto ping_prot;
  45 #if IS_ENABLED(CONFIG_IPV6)
  46 extern struct pingv6_ops pingv6_ops;
  47 #endif
  48
  49 struct pingfakehdr {
  50         struct icmphdr icmph;
  51         struct msghdr *msg;
  52         sa_family_t family;
  53         __wsum wcheck;
  54 };
  55
  56 int  ping_get_port(struct sock *sk, unsigned short ident);
  57 int ping_hash(struct sock *sk);
  58 void ping_unhash(struct sock *sk);
  59
  60 int  ping_init_sock(struct sock *sk);
  61 void ping_close(struct sock *sk, long timeout);
  62 int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
  63 void ping_err(struct sk_buff *skb, int offset, u32 info);
  64 int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
  65                   struct sk_buff *);
  66
  67 int  ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
  68                   int flags, int *addr_len);
  69 int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
  70                          void *user_icmph, size_t icmph_len);
  71 int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
  72 enum skb_drop_reason ping_rcv(struct sk_buff *skb);
  73
  74 #ifdef CONFIG_PROC_FS
  75 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
  76 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
  77 void ping_seq_stop(struct seq_file *seq, void *v);
  78
  79 int __init ping_proc_init(void);
  80 void ping_proc_exit(void);
  81 #endif
  82
  83 void __init ping_init(void);
  84 int  __init pingv6_init(void);
  85 void pingv6_exit(void);
  86
  87 #endif /* _PING_H */