Mercurial > flash_v2

annotate packages/redboot/current/src/net/inet_addr.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children
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1 //==========================================================================
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2 //
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3 // net/inet_addr.c
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4 //
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5 // Stand-alone IP address parsing for RedBoot
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6 //
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7 //==========================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): gthomas
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44 // Contributors: gthomas
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45 // Date: 2000-07-14
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46 // Purpose:
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47 // Description:
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48 //
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49 // This code is part of RedBoot (tm).
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 #include <redboot.h>
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56 #include <net/net.h>
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57
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58 bool
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59 inet_aton(const char *s, in_addr_t *addr)
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60 {
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61 int i, val, radix, digit;
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62 unsigned long res = 0;
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63 bool first;
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64 char c;
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65
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66 for (i = 0; i < 4; i++) {
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67 // Parse next digit string
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68 first = true;
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69 val = 0;
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70 radix = 10;
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71 while ((c = *s++) != '\0') {
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72 if (first && (c == '0') && (_tolower(*s) == 'x')) {
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73 radix = 16;
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74 s++; // Skip over 0x
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75 c = *s++;
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76 }
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77 first = false;
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78 if (_is_hex(c) && ((digit = _from_hex(c)) < radix)) {
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79 // Valid digit
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80 val = (val * radix) + digit;
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81 } else if (c == '.' && i < 3) { // all but last terminate by '.'
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82 break;
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83 } else {
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84 return false;
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85 }
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86 }
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87 // merge result
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88 #ifdef __LITTLE_ENDIAN__
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89 res |= val << ((3-i)*8); // 24, 16, 8, 0
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90 #else
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91 res = (res << 8) | val;
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92 #endif
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93 if ('\0' == c) {
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94 if (0 == i) { // first field found end of string
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95 res = val; // no shifting, use it as the whole thing
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96 break; // permit entering a single number
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97 }
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98 if (3 > i) // we found end of string before getting 4 fields
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99 return false;
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100 }
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101 // after that we check that it was 0..255 only
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102 if (val &~0xff) return false;
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103 }
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104 addr->s_addr = htonl(res);
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105 return true;
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106 }
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107
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108 // Assumes address is in network byte order
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109 char *
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110 inet_ntoa(in_addr_t *addr)
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111 {
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112 static char str[32];
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113 unsigned char *ap;
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114
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115 ap = (unsigned char *)addr;
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116 diag_sprintf(str, "%d.%d.%d.%d", ap[0], ap[1], ap[2], ap[3]);
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117 return str;
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118 }