source: mainline/uspace/srv/net/inet.c@ 91001e2

/*
 * Copyright (c) 2009 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup net
 *  @{
 */

/** @file
 *  Internet protocol address conversion functions implementation.
 */

#include <errno.h>
#include <mem.h>
#include <stdio.h>
#include <string.h>

#include "include/in.h"
#include "include/in6.h"
#include "include/inet.h"
#include "include/socket_codes.h"

int inet_pton( uint16_t family, const char * address, uint8_t * data ){
        const char *    next;
        char *                  last;
        int                             index;
        int                             count;
        int                             base;
        size_t                  bytes;
        size_t                  shift;
        unsigned long   value;

        if( ! data ) return EINVAL;
        switch( family ){
                case AF_INET:
                        count = 4;
                        base = 10;
                        bytes = 1;
                        break;
                case AF_INET6:
                        count = 16;
                        base = 16;
                        bytes = 4;
                        break;
                default:
                        return ENOTSUP;
        }
        if( ! address ){
                bzero( data, count );
                return ENOENT;
        }
        next = address;
        index = 0;
        do{
                if( next && ( * next )){
                        if( index ) ++ next;
                        value = strtoul( next, & last, base );
                        next = last;
                        shift = bytes - 1;
                        do{
                                // like little endian
                                data[ index + shift ] = value;
                                value >>= 8;
                        }while( shift -- );
                        index += bytes;
                }else{
                        bzero( data + index, count - index );
                        return EOK;
                }
        }while( index < count );
        return EOK;
}

int inet_ntop( uint16_t family, const uint8_t * data, char * address, size_t length ){
        if(( ! data ) || ( ! address )) return EINVAL;
        switch( family ){
                case AF_INET:   if( length < INET_ADDRSTRLEN ) return ENOMEM;
                                                snprintf( address, length, "%hhu.%hhu.%hhu.%hhu", data[ 0 ], data[ 1 ], data[ 2 ], data[ 3 ] );
                                                return EOK;
                case AF_INET6:  if( length < INET6_ADDRSTRLEN ) return ENOMEM;
                                                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 ] );
                                                return EOK;
                default:                return ENOTSUP;
        }
}

/** @}
 */