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 ping_portaddr_for_each_entry(__sk, node, list) \
  20         hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
  21
  22 /*
  23  * gid_t is either uint or ushort.  We want to pass it to
  24  * proc_dointvec_minmax(), so it must not be larger than MAX_INT
  25  */
  26 #define GID_T_MAX (((gid_t)~0U) >> 1)
  27
  28 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
  29 struct pingv6_ops {
  30         int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
  31                                int *addr_len);
  32         void (*ip6_datagram_recv_common_ctl)(struct sock *sk,
  33                                              struct msghdr *msg,
  34                                              struct sk_buff *skb);
  35         void (*ip6_datagram_recv_specific_ctl)(struct sock *sk,
  36                                                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_iter_state {
  46         struct seq_net_private  p;
  47         int                     bucket;
  48         sa_family_t             family;
  49 };
  50
  51 extern struct proto ping_prot;
  52 #if IS_ENABLED(CONFIG_IPV6)
  53 extern struct pingv6_ops pingv6_ops;
  54 #endif
  55
  56 struct pingfakehdr {
  57         struct icmphdr icmph;
  58         struct msghdr *msg;
  59         sa_family_t family;
  60         __wsum wcheck;
  61 };
  62
  63 int  ping_get_port(struct sock *sk, unsigned short ident);
  64 int ping_hash(struct sock *sk);
  65 void ping_unhash(struct sock *sk);
  66
  67 int  ping_init_sock(struct sock *sk);
  68 void ping_close(struct sock *sk, long timeout);
  69 int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
  70 void ping_err(struct sk_buff *skb, int offset, u32 info);
  71 int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
  72                   struct sk_buff *);
  73
  74 int  ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
  75                   int flags, int *addr_len);
  76 int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
  77                          void *user_icmph, size_t icmph_len);
  78 int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
  79 bool ping_rcv(struct sk_buff *skb);
  80
  81 #ifdef CONFIG_PROC_FS
  82 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
  83 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
  84 void ping_seq_stop(struct seq_file *seq, void *v);
  85
  86 int __init ping_proc_init(void);
  87 void ping_proc_exit(void);
  88 #endif
  89
  90 void __init ping_init(void);
  91 int  __init pingv6_init(void);
  92 void pingv6_exit(void);
  93
  94 #endif /* _PING_H */