Modules/addrinfo.h

   1 /*
   2  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the project nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef HAVE_GETADDRINFO
  31
  32 /*
  33  * Error return codes from getaddrinfo()
  34  */
  35 #ifdef EAI_ADDRFAMILY
  36 /* If this is defined, there is a conflicting implementation
  37    in the C library, which can't be used for some reason.
  38    Make sure it won't interfere with this emulation. */
  39
  40 #undef EAI_ADDRFAMILY
  41 #undef EAI_AGAIN
  42 #undef EAI_BADFLAGS
  43 #undef EAI_FAIL
  44 #undef EAI_FAMILY
  45 #undef EAI_MEMORY
  46 #undef EAI_NODATA
  47 #undef EAI_NONAME
  48 #undef EAI_SERVICE
  49 #undef EAI_SOCKTYPE
  50 #undef EAI_SYSTEM
  51 #undef EAI_BADHINTS
  52 #undef EAI_PROTOCOL
  53 #undef EAI_MAX
  54 #undef getaddrinfo
  55 #define getaddrinfo fake_getaddrinfo
  56 #endif /* EAI_ADDRFAMILY */
  57
  58 #define EAI_ADDRFAMILY   1      /* address family for hostname not supported */
  59 #define EAI_AGAIN        2      /* temporary failure in name resolution */
  60 #define EAI_BADFLAGS     3      /* invalid value for ai_flags */
  61 #define EAI_FAIL         4      /* non-recoverable failure in name resolution */
  62 #define EAI_FAMILY       5      /* ai_family not supported */
  63 #define EAI_MEMORY       6      /* memory allocation failure */
  64 #define EAI_NODATA       7      /* no address associated with hostname */
  65 #define EAI_NONAME       8      /* hostname nor servname provided, or not known */
  66 #define EAI_SERVICE      9      /* servname not supported for ai_socktype */
  67 #define EAI_SOCKTYPE    10      /* ai_socktype not supported */
  68 #define EAI_SYSTEM      11      /* system error returned in errno */
  69 #define EAI_BADHINTS    12
  70 #define EAI_PROTOCOL    13
  71 #define EAI_MAX         14
  72
  73 /*
  74  * Flag values for getaddrinfo()
  75  */
  76 #ifdef AI_PASSIVE
  77 #undef AI_PASSIVE
  78 #undef AI_CANONNAME
  79 #undef AI_NUMERICHOST
  80 #undef AI_MASK
  81 #undef AI_ALL
  82 #undef AI_V4MAPPED_CFG
  83 #undef AI_ADDRCONFIG
  84 #undef AI_V4MAPPED
  85 #undef AI_DEFAULT
  86 #endif /* AI_PASSIVE */
  87
  88 #define AI_PASSIVE      0x00000001 /* get address to use bind() */
  89 #define AI_CANONNAME    0x00000002 /* fill ai_canonname */
  90 #define AI_NUMERICHOST  0x00000004 /* prevent name resolution */
  91 /* valid flags for addrinfo */
  92 #define AI_MASK         (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST)
  93
  94 #define AI_ALL          0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */
  95 #define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */
  96 #define AI_ADDRCONFIG   0x00000400 /* only if any address is assigned */
  97 #define AI_V4MAPPED     0x00000800 /* accept IPv4-mapped IPv6 address */
  98 /* special recommended flags for getipnodebyname */
  99 #define AI_DEFAULT      (AI_V4MAPPED_CFG | AI_ADDRCONFIG)
 100
 101 #endif /* !HAVE_GETADDRINFO */
 102
 103 #ifndef HAVE_GETNAMEINFO
 104
 105 /*
 106  * Constants for getnameinfo()
 107  */
 108 #ifndef NI_MAXHOST
 109 #define NI_MAXHOST      1025
 110 #define NI_MAXSERV      32
 111 #endif /* !NI_MAXHOST */
 112
 113 /*
 114  * Flag values for getnameinfo()
 115  */
 116 #ifndef NI_NOFQDN
 117 #define NI_NOFQDN       0x00000001
 118 #define NI_NUMERICHOST  0x00000002
 119 #define NI_NAMEREQD     0x00000004
 120 #define NI_NUMERICSERV  0x00000008
 121 #define NI_DGRAM        0x00000010
 122 #endif /* !NI_NOFQDN */
 123
 124 #endif /* !HAVE_GETNAMEINFO */
 125
 126 #ifndef HAVE_ADDRINFO
 127 struct addrinfo {
 128     int         ai_flags;       /* AI_PASSIVE, AI_CANONNAME */
 129     int         ai_family;      /* PF_xxx */
 130     int         ai_socktype;    /* SOCK_xxx */
 131     int         ai_protocol;    /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
 132     size_t      ai_addrlen;     /* length of ai_addr */
 133     char        *ai_canonname;  /* canonical name for hostname */
 134     struct sockaddr *ai_addr;           /* binary address */
 135     struct addrinfo *ai_next;           /* next structure in linked list */
 136 };
 137 #endif /* !HAVE_ADDRINFO */
 138
 139 #ifndef HAVE_SOCKADDR_STORAGE
 140 /*
 141  * RFC 2553: protocol-independent placeholder for socket addresses
 142  */
 143 #define _SS_MAXSIZE     128
 144 #ifdef HAVE_LONG_LONG
 145 #define _SS_ALIGNSIZE   (sizeof(PY_LONG_LONG))
 146 #else
 147 #define _SS_ALIGNSIZE   (sizeof(double))
 148 #endif /* HAVE_LONG_LONG */
 149 #define _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(u_char) * 2)
 150 #define _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(u_char) * 2 - \
 151                 _SS_PAD1SIZE - _SS_ALIGNSIZE)
 152
 153 struct sockaddr_storage {
 154 #ifdef HAVE_SOCKADDR_SA_LEN
 155     unsigned char ss_len;               /* address length */
 156     unsigned char ss_family;            /* address family */
 157 #else
 158     unsigned short ss_family;           /* address family */
 159 #endif /* HAVE_SOCKADDR_SA_LEN */
 160     char        __ss_pad1[_SS_PAD1SIZE];
 161 #ifdef HAVE_LONG_LONG
 162     PY_LONG_LONG __ss_align;            /* force desired structure storage alignment */
 163 #else
 164     double __ss_align;          /* force desired structure storage alignment */
 165 #endif /* HAVE_LONG_LONG */
 166     char        __ss_pad2[_SS_PAD2SIZE];
 167 };
 168 #endif /* !HAVE_SOCKADDR_STORAGE */
 169
 170 #ifdef __cplusplus
 171 extern "C" {
 172 #endif
 173 extern void freehostent(struct hostent *);
 174 #ifdef __cplusplus
 175 }
 176 #endif