2 * Redistribution and use in source and binary forms, with or without modification,
3 * are permitted provided that the following conditions are met:
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.
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
24 * This file is part of the lwIP TCP/IP stack.
26 * Author: Simon Goldschmidt
32 #if LWIP_DNS && LWIP_SOCKET
34 #include "lwip/sockets.h"
36 /* some rarely used options */
37 #ifndef LWIP_DNS_API_DECLARE_H_ERRNO
38 #define LWIP_DNS_API_DECLARE_H_ERRNO 1
41 #ifndef LWIP_DNS_API_DEFINE_ERRORS
42 #define LWIP_DNS_API_DEFINE_ERRORS 1
45 #ifndef LWIP_DNS_API_DECLARE_STRUCTS
46 #define LWIP_DNS_API_DECLARE_STRUCTS 1
49 #if LWIP_DNS_API_DEFINE_ERRORS
50 /** Errors used by the DNS API functions, h_errno can be one of them */
51 #define EAI_NONAME 200
52 #define EAI_SERVICE 201
54 #define EAI_MEMORY 203
56 #define HOST_NOT_FOUND 210
58 #define NO_RECOVERY 212
60 #endif /* LWIP_DNS_API_DEFINE_ERRORS */
62 #if LWIP_DNS_API_DECLARE_STRUCTS
64 char *h_name; /* Official name of the host. */
65 char **h_aliases; /* A pointer to an array of pointers to alternative host names,
66 terminated by a null pointer. */
67 int h_addrtype; /* Address type. */
68 int h_length; /* The length, in bytes, of the address. */
69 char **h_addr_list; /* A pointer to an array of pointers to network addresses (in
70 network byte order) for the host, terminated by a null pointer. */
71 #define h_addr h_addr_list[0] /* for backward compatibility */
75 int ai_flags; /* Input flags. */
76 int ai_family; /* Address family of socket. */
77 int ai_socktype; /* Socket type. */
78 int ai_protocol; /* Protocol of socket. */
79 socklen_t ai_addrlen; /* Length of socket address. */
80 struct sockaddr *ai_addr; /* Socket address of socket. */
81 char *ai_canonname; /* Canonical name of service location. */
82 struct addrinfo *ai_next; /* Pointer to next in list. */
84 #endif /* LWIP_DNS_API_DECLARE_STRUCTS */
86 #if LWIP_DNS_API_DECLARE_H_ERRNO
87 /* application accessable error code set by the DNS API functions */
89 #endif /* LWIP_DNS_API_DECLARE_H_ERRNO*/
91 struct hostent *lwip_gethostbyname(const char *name);
92 int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
93 size_t buflen, struct hostent **result, int *h_errnop);
94 void lwip_freeaddrinfo(struct addrinfo *ai);
95 int lwip_getaddrinfo(const char *nodename,
97 const struct addrinfo *hints,
98 struct addrinfo **res);
100 #if LWIP_COMPAT_SOCKETS
101 #define gethostbyname(name) lwip_gethostbyname(name)
102 #define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \
103 lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop)
104 #define freeaddrinfo(addrinfo) lwip_freeaddrinfo(a)
105 #define getaddrinfo(nodname, servname, hints, res) \
106 lwip_getaddrinfo(nodname, servname, hints, res)
107 #endif /* LWIP_COMPAT_SOCKETS */
109 #endif /* LWIP_DNS && LWIP_SOCKET */