125 lines
4.5 KiB
C
125 lines
4.5 KiB
C
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/*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Simon Goldschmidt
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*
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*/
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#ifndef __LWIP_NETDB_H__
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#define __LWIP_NETDB_H__
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#include "lwip/opt.h"
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#if LWIP_DNS && LWIP_SOCKET
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#include <stddef.h> /* for size_t */
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#include "lwip/inet.h"
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#include "lwip/sockets.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* some rarely used options */
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#ifndef LWIP_DNS_API_DECLARE_H_ERRNO
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#define LWIP_DNS_API_DECLARE_H_ERRNO 1
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#endif
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#ifndef LWIP_DNS_API_DEFINE_ERRORS
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#define LWIP_DNS_API_DEFINE_ERRORS 1
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#endif
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#ifndef LWIP_DNS_API_DECLARE_STRUCTS
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#define LWIP_DNS_API_DECLARE_STRUCTS 1
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#endif
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#if LWIP_DNS_API_DEFINE_ERRORS
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/** Errors used by the DNS API functions, h_errno can be one of them */
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#define EAI_NONAME 200
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#define EAI_SERVICE 201
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#define EAI_FAIL 202
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#define EAI_MEMORY 203
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#define HOST_NOT_FOUND 210
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#define NO_DATA 211
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#define NO_RECOVERY 212
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#define TRY_AGAIN 213
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#endif /* LWIP_DNS_API_DEFINE_ERRORS */
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#if LWIP_DNS_API_DECLARE_STRUCTS
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struct hostent {
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char *h_name; /* Official name of the host. */
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char **h_aliases; /* A pointer to an array of pointers to alternative host names,
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terminated by a null pointer. */
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int h_addrtype; /* Address type. */
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int h_length; /* The length, in bytes, of the address. */
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char **h_addr_list; /* A pointer to an array of pointers to network addresses (in
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network byte order) for the host, terminated by a null pointer. */
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#define h_addr h_addr_list[0] /* for backward compatibility */
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};
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struct addrinfo {
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int ai_flags; /* Input flags. */
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int ai_family; /* Address family of socket. */
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int ai_socktype; /* Socket type. */
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int ai_protocol; /* Protocol of socket. */
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socklen_t ai_addrlen; /* Length of socket address. */
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struct sockaddr *ai_addr; /* Socket address of socket. */
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char *ai_canonname; /* Canonical name of service location. */
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struct addrinfo *ai_next; /* Pointer to next in list. */
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};
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#endif /* LWIP_DNS_API_DECLARE_STRUCTS */
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#if LWIP_DNS_API_DECLARE_H_ERRNO
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/* application accessable error code set by the DNS API functions */
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extern int h_errno;
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#endif /* LWIP_DNS_API_DECLARE_H_ERRNO*/
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struct hostent *lwip_gethostbyname(const char *name);
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int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
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size_t buflen, struct hostent **result, int *h_errnop);
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void lwip_freeaddrinfo(struct addrinfo *ai);
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int lwip_getaddrinfo(const char *nodename,
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const char *servname,
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const struct addrinfo *hints,
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struct addrinfo **res);
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#if LWIP_COMPAT_SOCKETS
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#define gethostbyname(name) lwip_gethostbyname(name)
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#define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \
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lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop)
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#define freeaddrinfo(addrinfo) lwip_freeaddrinfo(addrinfo)
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#define getaddrinfo(nodname, servname, hints, res) \
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lwip_getaddrinfo(nodname, servname, hints, res)
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#endif /* LWIP_COMPAT_SOCKETS */
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_DNS && LWIP_SOCKET */
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#endif /* __LWIP_NETDB_H__ */
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