| 1 | /* Snagged from GNU C library, version 2.0.3. */
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| 2 |
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| 3 | /*
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| 4 | * ++Copyright++ 1983, 1990, 1993
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| 5 | * -
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| 6 | * Copyright (c) 1983, 1990, 1993
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| 7 | * The Regents of the University of California. All rights reserved.
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| 8 | *
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| 9 | * Redistribution and use in source and binary forms, with or without
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| 10 | * modification, are permitted provided that the following conditions
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| 11 | * are met:
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| 12 | * 1. Redistributions of source code must retain the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer.
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer in the
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| 16 | * documentation and/or other materials provided with the distribution.
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| 17 | * 3. All advertising materials mentioning features or use of this software
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| 18 | * must display the following acknowledgement:
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| 19 | * This product includes software developed by the University of
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| 20 | * California, Berkeley and its contributors.
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| 21 | * 4. Neither the name of the University nor the names of its contributors
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| 22 | * may be used to endorse or promote products derived from this software
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| 23 | * without specific prior written permission.
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| 24 | *
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| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 35 | * SUCH DAMAGE.
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| 36 | * -
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| 37 | * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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| 38 | *
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| 39 | * Permission to use, copy, modify, and distribute this software for any
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| 40 | * purpose with or without fee is hereby granted, provided that the above
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| 41 | * copyright notice and this permission notice appear in all copies, and that
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| 42 | * the name of Digital Equipment Corporation not be used in advertising or
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| 43 | * publicity pertaining to distribution of the document or software without
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| 44 | * specific, written prior permission.
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| 45 | *
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| 46 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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| 47 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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| 48 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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| 49 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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| 50 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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| 51 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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| 52 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 53 | * SOFTWARE.
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| 54 | * -
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| 55 | * --Copyright--
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| 56 | */
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| 57 |
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| 58 | #if defined(LIBC_SCCS) && !defined(lint)
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| 59 | static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
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| 60 | static char rcsid[] = "$Id: inet_addr.c,v 1.5 1996/08/14 03:48:37 drepper Exp $";
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| 61 | #endif /* LIBC_SCCS and not lint */
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| 62 |
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| 63 | #include <config.h>
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| 64 |
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| 65 | #if !defined (HAVE_INET_ATON) && defined (HAVE_NETWORK) && defined (HAVE_NETINET_IN_H) && defined (HAVE_ARPA_INET_H)
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| 66 |
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| 67 | #include <sys/types.h>
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| 68 | #include <sys/param.h>
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| 69 | #include <netinet/in.h>
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| 70 | #include <arpa/inet.h>
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| 71 |
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| 72 | #ifdef HAVE_UNISTD_H
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| 73 | # include <unistd.h>
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| 74 | #endif
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| 75 |
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| 76 | #include <bashansi.h>
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| 77 | #include <ctype.h>
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| 78 | #include <stdc.h>
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| 79 |
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| 80 | #ifndef INADDR_NONE
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| 81 | # define INADDR_NONE 0xffffffff
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| 82 | #endif
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| 83 |
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| 84 | /* these are compatibility routines, not needed on recent BSD releases */
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| 85 |
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| 86 | #if 0
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| 87 | /* Not used, not needed. */
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| 88 | /*
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| 89 | * Ascii internet address interpretation routine.
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| 90 | * The value returned is in network order.
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| 91 | */
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| 92 | u_long
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| 93 | inet_addr(cp)
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| 94 | register const char *cp;
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| 95 | {
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| 96 | struct in_addr val;
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| 97 |
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| 98 | if (inet_aton(cp, &val))
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| 99 | return (val.s_addr);
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| 100 | return (INADDR_NONE);
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| 101 | }
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| 102 | #endif
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| 103 |
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| 104 | /*
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| 105 | * Check whether "cp" is a valid ascii representation
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| 106 | * of an Internet address and convert to a binary address.
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| 107 | * Returns 1 if the address is valid, 0 if not.
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| 108 | * This replaces inet_addr, the return value from which
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| 109 | * cannot distinguish between failure and a local broadcast address.
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| 110 | */
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| 111 | int
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| 112 | inet_aton(cp, addr)
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| 113 | register const char *cp;
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| 114 | struct in_addr *addr;
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| 115 | {
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| 116 | register u_bits32_t val;
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| 117 | register int base, n;
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| 118 | register unsigned char c;
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| 119 | u_int parts[4];
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| 120 | register u_int *pp = parts;
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| 121 |
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| 122 | c = *cp;
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| 123 | for (;;) {
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| 124 | /*
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| 125 | * Collect number up to ``.''.
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| 126 | * Values are specified as for C:
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| 127 | * 0x=hex, 0=octal, isdigit=decimal.
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| 128 | */
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| 129 | #if 0
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| 130 | if (!isdigit(c))
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| 131 | #else
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| 132 | if (c != '0' && c != '1' && c != '2' && c != '3' && c != '4' &&
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| 133 | c != '5' && c != '6' && c != '7' && c != '8' && c != '9')
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| 134 | #endif
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| 135 | return (0);
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| 136 | val = 0; base = 10;
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| 137 | if (c == '0') {
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| 138 | c = *++cp;
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| 139 | if (c == 'x' || c == 'X')
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| 140 | base = 16, c = *++cp;
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| 141 | else
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| 142 | base = 8;
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| 143 | }
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| 144 | for (;;) {
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| 145 | if (isascii(c) && isdigit(c)) {
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| 146 | val = (val * base) + (c - '0');
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| 147 | c = *++cp;
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| 148 | } else if (base == 16 && isascii(c) && isxdigit(c)) {
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| 149 | val = (val << 4) |
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| 150 | (c + 10 - (islower(c) ? 'a' : 'A'));
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| 151 | c = *++cp;
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| 152 | } else
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| 153 | break;
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| 154 | }
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| 155 | if (c == '.') {
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| 156 | /*
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| 157 | * Internet format:
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| 158 | * a.b.c.d
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| 159 | * a.b.c (with c treated as 16 bits)
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| 160 | * a.b (with b treated as 24 bits)
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| 161 | */
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| 162 | if (pp >= parts + 3)
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| 163 | return (0);
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| 164 | *pp++ = val;
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| 165 | c = *++cp;
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| 166 | } else
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| 167 | break;
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| 168 | }
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| 169 | /*
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| 170 | * Check for trailing characters.
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| 171 | */
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| 172 | if (c != '\0' && (!isascii(c) || !isspace(c)))
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| 173 | return (0);
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| 174 | /*
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| 175 | * Concoct the address according to
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| 176 | * the number of parts specified.
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| 177 | */
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| 178 | n = pp - parts + 1;
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| 179 | switch (n) {
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| 180 |
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| 181 | case 0:
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| 182 | return (0); /* initial nondigit */
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| 183 |
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| 184 | case 1: /* a -- 32 bits */
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| 185 | break;
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| 186 |
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| 187 | case 2: /* a.b -- 8.24 bits */
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| 188 | if (val > 0xffffff)
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| 189 | return (0);
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| 190 | val |= parts[0] << 24;
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| 191 | break;
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| 192 |
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| 193 | case 3: /* a.b.c -- 8.8.16 bits */
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| 194 | if (val > 0xffff)
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| 195 | return (0);
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| 196 | val |= (parts[0] << 24) | (parts[1] << 16);
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| 197 | break;
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| 198 |
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| 199 | case 4: /* a.b.c.d -- 8.8.8.8 bits */
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| 200 | if (val > 0xff)
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| 201 | return (0);
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| 202 | val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
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| 203 | break;
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| 204 | }
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| 205 | if (addr)
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| 206 | addr->s_addr = htonl(val);
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| 207 | return (1);
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| 208 | }
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| 209 |
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| 210 | #endif /* !HAVE_INET_ATON */
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