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annotate packages/redboot/current/src/net/inet_addr.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children f0e3fb000de8
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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 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas
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36 // Date: 2000-07-14
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37 // Purpose:
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38 // Description:
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39 //
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40 // This code is part of RedBoot (tm).
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //==========================================================================
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45
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46 #include <redboot.h>
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47 #include <net/net.h>
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48
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49 bool
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50 inet_aton(char *s, in_addr_t *addr)
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51 {
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52 int i, val, radix, digit;
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53 unsigned long res = 0;
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54 bool first;
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55 char c;
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56
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57 for (i = 0; i < 4; i++) {
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58 // Parse next digit string
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59 first = true;
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60 val = 0;
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61 radix = 10;
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62 while ((c = *s++) != '\0') {
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63 if (first && (c == '0') && (tolower(*s) == 'x')) {
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64 radix = 16;
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65 s++; // Skip over 0x
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66 c = *s++;
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67 }
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68 first = false;
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69 if (_is_hex(c) && ((digit = _from_hex(c)) < radix)) {
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70 // Valid digit
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71 val = (val * radix) + digit;
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72 } else if (c == '.') {
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73 break;
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74 } else {
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75 return false;
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76 }
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77 }
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78 // merge result
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79 res |= val << ((3-i)*8); // 24, 16, 8, 0
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80 }
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81 addr->s_addr = htonl(res);
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82 return true;
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83 }
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84
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85 // Assumes address is in network byte order
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86 char *
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87 inet_ntoa(in_addr_t *addr)
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88 {
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89 static char str[32];
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90 unsigned char *ap;
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91
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92 ap = (unsigned char *)addr;
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93 sprintf(str, "%d.%d.%d.%d", ap[0], ap[1], ap[2], ap[3]);
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94 return str;
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95 }