lib/drivers/lwip/src/include/lwip/netdb.h

   1 /*
   2  * Redistribution and use in source and binary forms, with or without modification,
   3  * are permitted provided that the following conditions are met:
   4  *
   5  * 1. Redistributions of source code must retain the above copyright notice,
   6  *    this list of conditions and the following disclaimer.
   7  * 2. Redistributions in binary form must reproduce the above copyright notice,
   8  *    this list of conditions and the following disclaimer in the documentation
   9  *    and/or other materials provided with the distribution.
  10  * 3. The name of the author may not be used to endorse or promote products
  11  *    derived from this software without specific prior written permission.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  14  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  15  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  16  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  17  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  18  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  19  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  20  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  21  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  22  * OF SUCH DAMAGE.
  23  *
  24  * This file is part of the lwIP TCP/IP stack.
  25  *
  26  * Author: Simon Goldschmidt
  27  *
  28  */
  29
  30 #include "lwip/opt.h"
  31
  32 #if LWIP_DNS && LWIP_SOCKET
  33
  34 #include <stddef.h> /* for size_t */
  35
  36 #include "lwip/sockets.h"
  37
  38 /* some rarely used options */
  39 #ifndef LWIP_DNS_API_DECLARE_H_ERRNO
  40 #define LWIP_DNS_API_DECLARE_H_ERRNO 1
  41 #endif
  42
  43 #ifndef LWIP_DNS_API_DEFINE_ERRORS
  44 #define LWIP_DNS_API_DEFINE_ERRORS 1
  45 #endif
  46
  47 #ifndef LWIP_DNS_API_DECLARE_STRUCTS
  48 #define LWIP_DNS_API_DECLARE_STRUCTS 1
  49 #endif
  50
  51 #if LWIP_DNS_API_DEFINE_ERRORS
  52 /** Errors used by the DNS API functions, h_errno can be one of them */
  53 #define EAI_NONAME      200
  54 #define EAI_SERVICE     201
  55 #define EAI_FAIL        202
  56 #define EAI_MEMORY      203
  57
  58 #define HOST_NOT_FOUND  210
  59 #define NO_DATA         211
  60 #define NO_RECOVERY     212
  61 #define TRY_AGAIN       213
  62 #endif /* LWIP_DNS_API_DEFINE_ERRORS */
  63
  64 #if LWIP_DNS_API_DECLARE_STRUCTS
  65 struct hostent {
  66     char  *h_name;      /* Official name of the host. */
  67     char **h_aliases;   /* A pointer to an array of pointers to alternative host names,
  68                            terminated by a null pointer. */
  69     int    h_addrtype;  /* Address type. */
  70     int    h_length;    /* The length, in bytes, of the address. */
  71     char **h_addr_list; /* A pointer to an array of pointers to network addresses (in
  72                            network byte order) for the host, terminated by a null pointer. */
  73 #define h_addr h_addr_list[0] /* for backward compatibility */
  74 };
  75
  76 struct addrinfo {
  77     int               ai_flags;      /* Input flags. */
  78     int               ai_family;     /* Address family of socket. */
  79     int               ai_socktype;   /* Socket type. */
  80     int               ai_protocol;   /* Protocol of socket. */
  81     socklen_t         ai_addrlen;    /* Length of socket address. */
  82     struct sockaddr  *ai_addr;       /* Socket address of socket. */
  83     char             *ai_canonname;  /* Canonical name of service location. */
  84     struct addrinfo  *ai_next;       /* Pointer to next in list. */
  85 };
  86 #endif /* LWIP_DNS_API_DECLARE_STRUCTS */
  87
  88 #if LWIP_DNS_API_DECLARE_H_ERRNO
  89 /* application accessable error code set by the DNS API functions */
  90 extern int h_errno;
  91 #endif /* LWIP_DNS_API_DECLARE_H_ERRNO*/
  92
  93 struct hostent *lwip_gethostbyname(const char *name);
  94 int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
  95                 size_t buflen, struct hostent **result, int *h_errnop);
  96 void lwip_freeaddrinfo(struct addrinfo *ai);
  97 int lwip_getaddrinfo(const char *nodename,
  98        const char *servname,
  99        const struct addrinfo *hints,
 100        struct addrinfo **res);
 101
 102 #if LWIP_COMPAT_SOCKETS
 103 #define gethostbyname(name) lwip_gethostbyname(name)
 104 #define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \
 105        lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop)
 106 #define freeaddrinfo(addrinfo) lwip_freeaddrinfo(addrinfo)
 107 #define getaddrinfo(nodname, servname, hints, res) \
 108        lwip_getaddrinfo(nodname, servname, hints, res)
 109 #endif /* LWIP_COMPAT_SOCKETS */
 110
 111 #endif /* LWIP_DNS && LWIP_SOCKET */