1 | /* |
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2 | * Copyright (c) 1983, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 4. Neither the name of the University nor the names of its contributors |
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14 | * may be used to endorse or promote products derived from this software |
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15 | * without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 | * SUCH DAMAGE. |
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28 | */ |
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29 | |
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30 | #if defined(LIBC_SCCS) && !defined(lint) |
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31 | static char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93"; |
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32 | #endif /* LIBC_SCCS and not lint */ |
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33 | |
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34 | #include <sys/types.h> |
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35 | #include <netinet/in.h> |
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36 | #include <arpa/inet.h> |
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37 | #include <ctype.h> |
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38 | |
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39 | /* |
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40 | * Internet network address interpretation routine. |
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41 | * The library routines call this routine to interpret |
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42 | * network numbers. |
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43 | */ |
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44 | u_int32_t |
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45 | inet_network(cp) |
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46 | register const char *cp; |
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47 | { |
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48 | register u_int32_t val, base, n, i; |
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49 | register char c; |
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50 | u_int32_t parts[4], *pp = parts; |
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51 | int digit; |
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52 | |
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53 | again: |
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54 | val = 0; base = 10; digit = 0; |
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55 | if (*cp == '0') |
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56 | digit = 1, base = 8, cp++; |
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57 | if (*cp == 'x' || *cp == 'X') |
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58 | base = 16, cp++; |
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59 | while ((c = *cp) != 0) { |
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60 | if (isdigit(c)) { |
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61 | if (base == 8 && (c == '8' || c == '9')) |
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62 | return (INADDR_NONE); |
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63 | val = (val * base) + (c - '0'); |
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64 | cp++; |
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65 | digit = 1; |
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66 | continue; |
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67 | } |
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68 | if (base == 16 && isxdigit(c)) { |
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69 | val = (val << 4) + (tolower (c) + 10 - 'a'); |
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70 | cp++; |
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71 | digit = 1; |
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72 | continue; |
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73 | } |
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74 | break; |
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75 | } |
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76 | if (!digit) |
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77 | return (INADDR_NONE); |
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78 | if (pp >= parts + 4 || val > 0xff) |
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79 | return (INADDR_NONE); |
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80 | if (*cp == '.') { |
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81 | *pp++ = val, cp++; |
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82 | goto again; |
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83 | } |
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84 | if (*cp && !isspace(*cp)) |
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85 | return (INADDR_NONE); |
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86 | if (pp >= parts + 4 || val > 0xff) |
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87 | return (INADDR_NONE); |
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88 | *pp++ = val; |
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89 | n = pp - parts; |
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90 | for (val = 0, i = 0; i < n; i++) { |
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91 | val <<= 8; |
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92 | val |= parts[i] & 0xff; |
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93 | } |
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94 | return (val); |
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95 | } |
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