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TOMOYO Linux Cross Reference
Linux/include/net/ping.h

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  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 (*ip6_datagram_recv_ctl)(struct sock *sk, struct msghdr *msg,
 36                                      struct sk_buff *skb);
 37         int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
 38         void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
 39                                 __be16 port, u32 info, u8 *payload);
 40         int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
 41                              const struct net_device *dev, int strict);
 42 };
 43 
 44 struct ping_table {
 45         struct hlist_nulls_head hash[PING_HTABLE_SIZE];
 46         rwlock_t                lock;
 47 };
 48 
 49 struct ping_iter_state {
 50         struct seq_net_private  p;
 51         int                     bucket;
 52         sa_family_t             family;
 53 };
 54 
 55 extern struct proto ping_prot;
 56 extern struct ping_table ping_table;
 57 #if IS_ENABLED(CONFIG_IPV6)
 58 extern struct pingv6_ops pingv6_ops;
 59 #endif
 60 
 61 struct pingfakehdr {
 62         struct icmphdr icmph;
 63         struct iovec *iov;
 64         sa_family_t family;
 65         __wsum wcheck;
 66 };
 67 
 68 int  ping_get_port(struct sock *sk, unsigned short ident);
 69 void ping_hash(struct sock *sk);
 70 void ping_unhash(struct sock *sk);
 71 
 72 int  ping_init_sock(struct sock *sk);
 73 void ping_close(struct sock *sk, long timeout);
 74 int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
 75 void ping_err(struct sk_buff *skb, int offset, u32 info);
 76 int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
 77                   struct sk_buff *);
 78 
 79 int  ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 80                   size_t len, int noblock, int flags, int *addr_len);
 81 int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
 82                          void *user_icmph, size_t icmph_len);
 83 int  ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 84                      size_t len);
 85 int  ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 86                      size_t len);
 87 int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
 88 void ping_rcv(struct sk_buff *skb);
 89 
 90 #ifdef CONFIG_PROC_FS
 91 struct ping_seq_afinfo {
 92         char                            *name;
 93         sa_family_t                     family;
 94         const struct file_operations    *seq_fops;
 95         const struct seq_operations     seq_ops;
 96 };
 97 
 98 extern const struct file_operations ping_seq_fops;
 99 
100 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
101 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
102 void ping_seq_stop(struct seq_file *seq, void *v);
103 int ping_proc_register(struct net *net, struct ping_seq_afinfo *afinfo);
104 void ping_proc_unregister(struct net *net, struct ping_seq_afinfo *afinfo);
105 
106 extern int __init ping_proc_init(void);
107 extern void ping_proc_exit(void);
108 #endif
109 
110 void __init ping_init(void);
111 int  __init pingv6_init(void);
112 void pingv6_exit(void);
113 
114 #endif /* _PING_H */
115 

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