Subversion Repositories or1k

//==========================================================================

//

//      net/inet_addr.c

//

//      Stand-alone IP address parsing for RedBoot

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-07-14

// Purpose:      

// Description:  

//              

// This code is part of RedBoot (tm).

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <redboot.h>

#include <net/net.h>

bool

inet_aton(const char *s, in_addr_t *addr)

{

    int i, val, radix, digit;

    unsigned long res = 0;

    bool first;

    char c;

    for (i = 0;  i < 4;  i++) {

        // Parse next digit string

        first = true;

        val = 0;

        radix = 10;

        while ((c = *s++) != '\0') {

            if (first && (c == '0') && (_tolower(*s) == 'x')) {

                radix = 16;

                s++;  // Skip over 0x

                c = *s++;

            }

            first = false;

            if (_is_hex(c) && ((digit = _from_hex(c)) < radix)) {

                // Valid digit

                val = (val * radix) + digit;

            } else if (c == '.' && i < 3) { // all but last terminate by '.'

                break;

            } else {

                return false;

            }

        }

        // merge result

#ifdef __LITTLE_ENDIAN__

        res |= val << ((3-i)*8);  // 24, 16, 8, 0

#else

        res = (res << 8) | val;

#endif

        if ('\0' == c) {

            if (0 == i) { // first field found end of string

                res = val; // no shifting, use it as the whole thing

                break; // permit entering a single number

            }

            if (3 > i) // we found end of string before getting 4 fields

                return false;

        }

        // after that we check that it was 0..255 only

        if (val &~0xff) return false;

    }

    addr->s_addr = htonl(res);

    return true;

}

// Assumes address is in network byte order

char *

inet_ntoa(in_addr_t *addr)

{

    static char str[32];

    unsigned char *ap;

    ap = (unsigned char *)addr;

    diag_sprintf(str, "%d.%d.%d.%d", ap[0], ap[1], ap[2], ap[3]);

    return str;

}