source: SVN/cambria/redboot/packages/redboot/current/src/net/inet_addr.c @ 1

Last change on this file since 1 was 1, checked in by Tim Harvey, 2 years ago

restored latest version of files from server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 4.0 KB
Line 
1//==========================================================================
2//
3//      net/inet_addr.c
4//
5//      Stand-alone IP address parsing for RedBoot
6//
7//==========================================================================
8//####ECOSGPLCOPYRIGHTBEGIN####
9// -------------------------------------------
10// This file is part of eCos, the Embedded Configurable Operating System.
11// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
12//
13// eCos is free software; you can redistribute it and/or modify it under
14// the terms of the GNU General Public License as published by the Free
15// Software Foundation; either version 2 or (at your option) any later version.
16//
17// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18// WARRANTY; without even the implied warranty of MERCHANTABILITY or
19// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
20// for more details.
21//
22// You should have received a copy of the GNU General Public License along
23// with eCos; if not, write to the Free Software Foundation, Inc.,
24// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25//
26// As a special exception, if other files instantiate templates or use macros
27// or inline functions from this file, or you compile this file and link it
28// with other works to produce a work based on this file, this file does not
29// by itself cause the resulting work to be covered by the GNU General Public
30// License. However the source code for this file must still be made available
31// in accordance with section (3) of the GNU General Public License.
32//
33// This exception does not invalidate any other reasons why a work based on
34// this file might be covered by the GNU General Public License.
35//
36// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37// at http://sources.redhat.com/ecos/ecos-license/
38// -------------------------------------------
39//####ECOSGPLCOPYRIGHTEND####
40//==========================================================================
41//#####DESCRIPTIONBEGIN####
42//
43// Author(s):    gthomas
44// Contributors: gthomas
45// Date:         2000-07-14
46// Purpose:     
47// Description: 
48//             
49// This code is part of RedBoot (tm).
50//
51//####DESCRIPTIONEND####
52//
53//==========================================================================
54
55#include <redboot.h>
56#include <net/net.h>
57
58bool
59inet_aton(const char *s, in_addr_t *addr)
60{
61    int i, val, radix, digit;
62    unsigned long res = 0;
63    bool first;
64    char c;
65   
66    for (i = 0;  i < 4;  i++) {
67        // Parse next digit string
68        first = true;
69        val = 0;
70        radix = 10;
71        while ((c = *s++) != '\0') {
72            if (first && (c == '0') && (_tolower(*s) == 'x')) {
73                radix = 16;
74                s++;  // Skip over 0x
75                c = *s++;
76            }
77            first = false;
78            if (_is_hex(c) && ((digit = _from_hex(c)) < radix)) {
79                // Valid digit
80                val = (val * radix) + digit;
81            } else if (c == '.' && i < 3) { // all but last terminate by '.'
82                break;
83            } else {
84                return false;
85            }
86        }
87        // merge result
88#ifdef __LITTLE_ENDIAN__
89        res |= val << ((3-i)*8);  // 24, 16, 8, 0
90#else
91        res = (res << 8) | val;
92#endif
93        if ('\0' == c) {
94            if (0 == i) { // first field found end of string
95                res = val; // no shifting, use it as the whole thing
96                break; // permit entering a single number
97            }
98            if (3 > i) // we found end of string before getting 4 fields
99                return false;
100        }
101        // after that we check that it was 0..255 only
102        if (val &~0xff) return false;
103    }
104    addr->s_addr = htonl(res);
105    return true;
106}
107
108// Assumes address is in network byte order
109char *
110inet_ntoa(in_addr_t *addr)
111{
112    static char str[32];
113    unsigned char *ap;
114
115    ap = (unsigned char *)addr;
116    diag_sprintf(str, "%d.%d.%d.%d", ap[0], ap[1], ap[2], ap[3]);
117    return str;
118}
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