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3846 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 net
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 *  @{
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 */
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/** @file
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 *  Internet protocol address conversion functions implementation.
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 */
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#include <errno.h>
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#include <mem.h>
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#include <stdio.h>
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#include "include/inet.h"
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#include "include/socket.h"
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int inet_pton( uint16_t family, const char * address, uint8_t * data ){
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    const char *    next;
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    char *          last;
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    int             index;
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    int             count;
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    int             base;
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    size_t          bytes;
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    size_t          shift;
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    unsigned long   value;
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    if( ! data ) return EINVAL;
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    switch( family ){
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        case AF_INET:
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            count = 4;
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            base = 10;
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            bytes = 1;
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            break;
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        case AF_INET6:
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            count = 16;
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            base = 16;
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            bytes = 4;
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            break;
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        default:
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            return ENOTSUP;
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    }
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    if( ! address ){
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        bzero( data, count );
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        return ENOENT;
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    }
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    next = address;
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    index = 0;
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    do{
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        if( next && ( * next )){
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            if( index ) ++ next;
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            value = strtoul( next, & last, base );
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            next = last;
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            shift = bytes - 1;
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            do{
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                // like little endian
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                data[ index + shift ] = value;
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                value >>= 8;
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            }while( shift -- );
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            index += bytes;
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        }else{
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            bzero( data + index, count - index );
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            return EOK;
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        }
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    }while( index < count );
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    return EOK;
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}
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int inet_ntop( uint16_t family, const uint8_t * data, char * address, size_t length ){
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    if(( ! data ) || ( ! address )) return EINVAL;
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    switch( family ){
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        case AF_INET:   if( length < INET_ADDRSTRLEN ) return ENOMEM;
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                        snprintf( address, length, "%hhu.%hhu.%hhu.%hhu", data[ 0 ], data[ 1 ], data[ 2 ], data[ 3 ] );
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                        return EOK;
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        case AF_INET6:  if( length < INET6_ADDRSTRLEN ) return ENOMEM;
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                        snprintf( address, length, "%hhx%hhx:%hhx%hhx:%hhx%hhx:%hhx%hhx:%hhx%hhx:%hhx%hhx:%hhx%hhx:%hhx%hhx", data[ 0 ], data[ 1 ], data[ 2 ], data[ 3 ], data[ 4 ], data[ 5 ], data[ 6 ], data[ 7 ], data[ 8 ], data[ 9 ], data[ 10 ], data[ 11 ], data[ 12 ], data[ 13 ], data[ 14 ], data[ 15 ] );
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                        return EOK;
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        default:        return ENOTSUP;
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    }
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}
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/** @}
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 */