[39e6e65a] | 1 | /* |
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| 2 | * ++Copyright++ 1983, 1990, 1993 |
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| 3 | * - |
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| 4 | * Copyright (c) 1983, 1990, 1993 |
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| 5 | * The Regents of the University of California. All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms, with or without |
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| 8 | * modification, are permitted provided that the following conditions |
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| 9 | * are met: |
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| 10 | * 1. Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * 3. All advertising materials mentioning features or use of this software |
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| 16 | * must display the following acknowledgement: |
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| 17 | * This product includes software developed by the University of |
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| 18 | * California, Berkeley and its contributors. |
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| 19 | * 4. Neither the name of the University nor the names of its contributors |
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| 20 | * may be used to endorse or promote products derived from this software |
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| 21 | * without specific prior written permission. |
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| 22 | * |
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 33 | * SUCH DAMAGE. |
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| 34 | * - |
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| 35 | * Portions Copyright (c) 1993 by Digital Equipment Corporation. |
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| 36 | * |
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| 37 | * Permission to use, copy, modify, and distribute this software for any |
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| 38 | * purpose with or without fee is hereby granted, provided that the above |
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| 39 | * copyright notice and this permission notice appear in all copies, and that |
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| 40 | * the name of Digital Equipment Corporation not be used in advertising or |
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| 41 | * publicity pertaining to distribution of the document or software without |
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| 42 | * specific, written prior permission. |
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| 43 | * |
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| 44 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL |
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| 45 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES |
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| 46 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT |
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| 47 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
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| 48 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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| 49 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
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| 50 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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| 51 | * SOFTWARE. |
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| 52 | * - |
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| 53 | * --Copyright-- |
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| 54 | */ |
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| 55 | |
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[09fdb5e8] | 56 | #if HAVE_CONFIG_H |
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| 57 | #include "config.h" |
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| 58 | #endif |
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[39e6e65a] | 59 | |
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| 60 | #include <sys/param.h> |
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| 61 | #include <netinet/in.h> |
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| 62 | #include <arpa/inet.h> |
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| 63 | #include <ctype.h> |
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| 64 | |
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| 65 | /* |
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[cf29bcb9] | 66 | * ASCII internet address interpretation routine. |
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[39e6e65a] | 67 | * The value returned is in network order. |
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| 68 | */ |
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[00a578a] | 69 | in_addr_t |
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[029c374c] | 70 | inet_addr( |
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| 71 | const char *cp) |
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[39e6e65a] | 72 | { |
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| 73 | struct in_addr val; |
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| 74 | |
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| 75 | if (inet_aton(cp, &val)) |
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| 76 | return (val.s_addr); |
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| 77 | return (INADDR_NONE); |
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| 78 | } |
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| 79 | |
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| 80 | /* |
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[cf29bcb9] | 81 | * Check whether "cp" is a valid ASCII representation |
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[39e6e65a] | 82 | * of an Internet address and convert to a binary address. |
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| 83 | * Returns 1 if the address is valid, 0 if not. |
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| 84 | * This replaces inet_addr, the return value from which |
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| 85 | * cannot distinguish between failure and a local broadcast address. |
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| 86 | */ |
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| 87 | int |
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[029c374c] | 88 | inet_aton( |
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| 89 | const char *cp, |
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| 90 | struct in_addr *addr) |
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[39e6e65a] | 91 | { |
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[00a578a] | 92 | in_addr_t val; |
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[39e6e65a] | 93 | register int base, n; |
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| 94 | register char c; |
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[a009d94] | 95 | uint32_t parts[4]; |
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| 96 | register uint32_t *pp = parts; |
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[39e6e65a] | 97 | |
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| 98 | c = *cp; |
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| 99 | for (;;) { |
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| 100 | /* |
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| 101 | * Collect number up to ``.''. |
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| 102 | * Values are specified as for C: |
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| 103 | * 0x=hex, 0=octal, isdigit=decimal. |
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| 104 | */ |
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[bab5c5fa] | 105 | if (!isdigit((unsigned char)c)) |
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[39e6e65a] | 106 | return (0); |
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| 107 | val = 0; base = 10; |
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| 108 | if (c == '0') { |
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| 109 | c = *++cp; |
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| 110 | if (c == 'x' || c == 'X') |
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| 111 | base = 16, c = *++cp; |
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| 112 | else |
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| 113 | base = 8; |
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| 114 | } |
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| 115 | for (;;) { |
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[bab5c5fa] | 116 | if (isascii((unsigned char)c) && isdigit((unsigned char)c)) { |
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[39e6e65a] | 117 | val = (val * base) + (c - '0'); |
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| 118 | c = *++cp; |
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[bab5c5fa] | 119 | } else if (base == 16 && isascii((unsigned char)c) && isxdigit((unsigned char)c)) { |
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[39e6e65a] | 120 | val = (val << 4) | |
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[bab5c5fa] | 121 | (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); |
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[39e6e65a] | 122 | c = *++cp; |
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| 123 | } else |
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| 124 | break; |
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| 125 | } |
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| 126 | if (c == '.') { |
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| 127 | /* |
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| 128 | * Internet format: |
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| 129 | * a.b.c.d |
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| 130 | * a.b.c (with c treated as 16 bits) |
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| 131 | * a.b (with b treated as 24 bits) |
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| 132 | */ |
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| 133 | if (pp >= parts + 3) |
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| 134 | return (0); |
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| 135 | *pp++ = val; |
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| 136 | c = *++cp; |
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| 137 | } else |
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| 138 | break; |
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| 139 | } |
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| 140 | /* |
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| 141 | * Check for trailing characters. |
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| 142 | */ |
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[bab5c5fa] | 143 | if (c != '\0' && (!isascii((unsigned char)c) || !isspace((unsigned char)c))) |
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[39e6e65a] | 144 | return (0); |
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| 145 | /* |
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| 146 | * Concoct the address according to |
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| 147 | * the number of parts specified. |
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| 148 | */ |
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| 149 | n = pp - parts + 1; |
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| 150 | switch (n) { |
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| 151 | |
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| 152 | case 0: |
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| 153 | return (0); /* initial nondigit */ |
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| 154 | |
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| 155 | case 1: /* a -- 32 bits */ |
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| 156 | break; |
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| 157 | |
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| 158 | case 2: /* a.b -- 8.24 bits */ |
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| 159 | if (val > 0xffffff) |
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| 160 | return (0); |
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| 161 | val |= parts[0] << 24; |
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| 162 | break; |
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| 163 | |
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| 164 | case 3: /* a.b.c -- 8.8.16 bits */ |
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| 165 | if (val > 0xffff) |
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| 166 | return (0); |
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| 167 | val |= (parts[0] << 24) | (parts[1] << 16); |
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| 168 | break; |
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| 169 | |
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| 170 | case 4: /* a.b.c.d -- 8.8.8.8 bits */ |
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| 171 | if (val > 0xff) |
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| 172 | return (0); |
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| 173 | val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); |
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| 174 | break; |
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| 175 | } |
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[cf29bcb9] | 176 | if (addr != NULL) |
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[39e6e65a] | 177 | addr->s_addr = htonl(val); |
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| 178 | return (1); |
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| 179 | } |
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