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4578 mejdrech 1
/*
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 * Copyright (c) 2009 Lukas Mejdrech
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - 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
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup netdb
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 *  @{
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 */
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/** @file
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 *  Structures and interfaces according to the BSD netdb.h file.
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 */
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#ifndef __NET_NETDB_H__
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#define __NET_NETDB_H__
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#include <sys/types.h>
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/** Structure returned by network data base library.
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 *  All addresses are supplied in host order, and returned in network order (suitable for use in system calls).
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 */
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struct  hostent {
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    /** Official host name.
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     */
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    char *  h_name;
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    /** Alias list.
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     */
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    char ** h_aliases;
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    /** Host address type.
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     */
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    int     h_addrtype;
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    /** Address length.
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     */
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    int     h_length;
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    /** List of addresses from name server.
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     */
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    char ** h_addr_list;
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    /** Address, for backward compatiblity.
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     */
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#define h_addr  h_addr_list[ 0 ]
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};
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/** @name Host entry address types definitions.
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 */
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/*@{*/
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/** Authoritative Answer Host not found address type.
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 */
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#define HOST_NOT_FOUND  1
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/** Non-Authoritive Host not found, or SERVERFAIL address type.
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 */
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#define TRY_AGAIN   2
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/** Non recoverable errors, FORMERR, REFUSED, NOTIMP address type.
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 */
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#define NO_RECOVERY 3
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/** Valid name, no data record of requested type address type.
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 */
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#define NO_DATA     4
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/** No address, look for MX record address type.
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 */
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#define NO_ADDRESS  NO_DATA
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/*@}*/
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/** Returns host entry by the host address.
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 *  \todo address type?
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 *  @param address The host address. Input parameter.
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 *  @param len The address length. Input parameter.
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 *  @param type The address type. Input parameter.
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 *  @returns Host entry information.
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 */
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struct hostent *    gethostbyaddr( const void * address, int len, int type );
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/** Returns host entry by the host name.
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 *  @param name The host name. Input parameter.
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 *  @returns Host entry information.
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 */
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struct hostent *    gethostbyname( const char * name );
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#endif
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/** @}
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 */