lib/libc/net/netdb_private.h

   1 /*-
   2  * Copyright (C) 2005 The FreeBSD Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  * $FreeBSD: src/lib/libc/net/netdb_private.h,v 1.13 2006/05/12 15:37:23 ume Exp $
  26  */
  27
  28 #ifndef _NETDB_PRIVATE_H_
  29 #define _NETDB_PRIVATE_H_
  30
  31 #include <stdio.h>                              /* XXX: for FILE */
  32
  33 #define NETDB_THREAD_ALLOC(name)                                        \
  34 static struct name name;                                                \
  35 static thread_key_t name##_key;                                         \
  36 static once_t name##_init_once = ONCE_INITIALIZER;                      \
  37 static int name##_thr_keycreated = 0;                                   \
  38 \
  39 static void name##_free(void *);                                        \
  40 \
  41 static void                                                             \
  42 name##_keycreate(void)                                                  \
  43 {                                                                       \
  44         name##_thr_keycreated =                                         \
  45             (thr_keycreate(&name##_key, name##_free) == 0);             \
  46 }                                                                       \
  47 \
  48 struct name *                                                           \
  49 __##name##_init(void)                                                   \
  50 {                                                                       \
  51         struct name *he;                                                \
  52                                                                         \
  53         if (thr_main() != 0)                                            \
  54                 return (&name);                                         \
  55         if (thr_once(&name##_init_once, name##_keycreate) != 0 ||       \
  56             !name##_thr_keycreated)                                     \
  57                 return (NULL);                                          \
  58         if ((he = thr_getspecific(name##_key)) != NULL)                 \
  59                 return (he);                                            \
  60         if ((he = calloc(1, sizeof(*he))) == NULL)                      \
  61                 return (NULL);                                          \
  62         if (thr_setspecific(name##_key, he) == 0)                       \
  63                 return (he);                                            \
  64         free(he);                                                       \
  65         return (NULL);                                                  \
  66 }
  67
  68 #define _MAXALIASES     35
  69 #define _MAXLINELEN     1024
  70 #define _MAXADDRS       35
  71 #define _HOSTBUFSIZE    (8 * 1024)
  72 #define _NETBUFSIZE     1025
  73
  74 struct hostent_data {
  75         uint32_t host_addr[4];                  /* IPv4 or IPv6 */
  76         char *h_addr_ptrs[_MAXADDRS + 1];
  77         char *host_aliases[_MAXALIASES];
  78         char hostbuf[_HOSTBUFSIZE];
  79         FILE *hostf;
  80         int stayopen;
  81 #ifdef YP
  82         char *yp_domain;
  83 #endif
  84 };
  85
  86 struct netent_data {
  87         char *net_aliases[_MAXALIASES];
  88         char netbuf[_NETBUFSIZE];
  89         FILE *netf;
  90         int stayopen;
  91 #ifdef YP
  92         char *yp_domain;
  93 #endif
  94 };
  95
  96 struct protoent_data {
  97         FILE *fp;
  98         char *aliases[_MAXALIASES];
  99         int stayopen;
 100         char line[_MAXLINELEN + 1];
 101 };
 102
 103 struct hostdata {
 104         struct hostent host;
 105         char data[sizeof(struct hostent_data)];
 106 };
 107
 108 struct netdata {
 109         struct netent net;
 110         char data[sizeof(struct netent_data)];
 111 };
 112
 113 struct protodata {
 114         struct protoent proto;
 115         char data[sizeof(struct protoent_data)];
 116 };
 117
 118 struct hostdata *__hostdata_init(void);
 119 struct hostent *__hostent_init(void);
 120 struct hostent_data *__hostent_data_init(void);
 121 struct netdata *__netdata_init(void);
 122 struct netent_data *__netent_data_init(void);
 123 struct protodata *__protodata_init(void);
 124 struct protoent_data *__protoent_data_init(void);
 125 int __copy_hostent(struct hostent *, struct hostent *, char *, size_t);
 126 int __copy_netent(struct netent *, struct netent *, char *, size_t);
 127 int __copy_protoent(struct protoent *, struct protoent *, char *, size_t);
 128
 129 void __endprotoent_p(struct protoent_data *);
 130 int __getprotoent_p(struct protoent *, struct protoent_data *);
 131 void __setprotoent_p(int, struct protoent_data *);
 132 void _endhostdnsent(void);
 133 void _endhosthtent(void);
 134 void _endnetdnsent(void);
 135 void _endnethtent(void);
 136 struct hostent *_gethostbynisaddr(const char *, int, int);
 137 struct hostent *_gethostbynisname(const char *, int);
 138 void _map_v4v6_address(const char *, char *);
 139 void _map_v4v6_hostent(struct hostent *, char **, int *);
 140 void _sethostdnsent(int);
 141 void _sethosthtent(int);
 142 void _setnetdnsent(int);
 143 void _setnethtent(int);
 144
 145 #endif /* _NETDB_PRIVATE_H_ */