1/* $FreeBSD$ */ 2 3/* 4 * ++Copyright++ 1983, 1990, 1993 5 * - 6 * Copyright (c) 1983, 1990, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * - 37 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 38 * 39 * Permission to use, copy, modify, and distribute this software for any 40 * purpose with or without fee is hereby granted, provided that the above 41 * copyright notice and this permission notice appear in all copies, and that 42 * the name of Digital Equipment Corporation not be used in advertising or 43 * publicity pertaining to distribution of the document or software without 44 * specific, written prior permission. 45 * 46 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 47 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 49 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 50 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 51 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 52 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 53 * SOFTWARE. 54 * - 55 * --Copyright-- 56 */ 57 58#if !defined(lint) 59static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; 60static const char rcsid[] = "@(#)$Id: inet_addr.c,v 1.8.2.3 2004/12/09 19:41:20 darrenr Exp $"; 61#endif /* LIBC_SCCS and not lint */ 62 63#include <sys/param.h> 64#include <netinet/in.h> 65#include <arpa/inet.h> 66#include <ctype.h> 67 68#ifndef __P 69# define __P(x) x 70#endif 71int inet_aton(const char *, struct in_addr *); 72 73/* 74 * Because the ctype(3) posix definition, if used "safely" in code everywhere, 75 * would mean all normal code that walks through strings needed casts. Yuck. 76 */ 77#define ISALNUM(x) isalnum((u_char)(x)) 78#define ISALPHA(x) isalpha((u_char)(x)) 79#define ISASCII(x) isascii((u_char)(x)) 80#define ISDIGIT(x) isdigit((u_char)(x)) 81#define ISPRINT(x) isprint((u_char)(x)) 82#define ISSPACE(x) isspace((u_char)(x)) 83#define ISUPPER(x) isupper((u_char)(x)) 84#define ISXDIGIT(x) isxdigit((u_char)(x)) 85#define ISLOWER(x) islower((u_char)(x)) 86 87/* 88 * Check whether "cp" is a valid ascii representation 89 * of an Internet address and convert to a binary address. 90 * Returns 1 if the address is valid, 0 if not. 91 * This replaces inet_addr, the return value from which 92 * cannot distinguish between failure and a local broadcast address. 93 */ 94int 95inet_aton(cp, addr) 96 register const char *cp; 97 struct in_addr *addr; 98{ 99 register u_long val; 100 register int base, n; 101 register char c; 102 u_int parts[4]; 103 register u_int *pp = parts; 104 105 c = *cp; 106 for (;;) { 107 /* 108 * Collect number up to ``.''. 109 * Values are specified as for C: 110 * 0x=hex, 0=octal, isdigit=decimal. 111 */ 112 if (!ISDIGIT(c)) 113 return (0); 114 val = 0; base = 10; 115 if (c == '0') { 116 c = *++cp; 117 if (c == 'x' || c == 'X') 118 base = 16, c = *++cp; 119 else 120 base = 8; 121 } 122 for (;;) { 123 if (ISASCII(c) && ISDIGIT(c)) { 124 val = (val * base) + (c - '0'); 125 c = *++cp; 126 } else if (base == 16 && ISASCII(c) && ISXDIGIT(c)) { 127 val = (val << 4) | 128 (c + 10 - (ISLOWER(c) ? 'a' : 'A')); 129 c = *++cp; 130 } else 131 break; 132 } 133 if (c == '.') { 134 /* 135 * Internet format: 136 * a.b.c.d 137 * a.b.c (with c treated as 16 bits) 138 * a.b (with b treated as 24 bits) 139 */ 140 if (pp >= parts + 3) 141 return (0); 142 *pp++ = val; 143 c = *++cp; 144 } else 145 break; 146 } 147 /* 148 * Check for trailing characters. 149 */ 150 if (c != '\0' && (!ISASCII(c) || !ISSPACE(c))) 151 return (0); 152 /* 153 * Concoct the address according to 154 * the number of parts specified. 155 */ 156 n = pp - parts + 1; 157 switch (n) { 158 159 case 0: 160 return (0); /* initial nondigit */ 161 162 case 1: /* a -- 32 bits */ 163 break; 164 165 case 2: /* a.b -- 8.24 bits */ 166 if (val > 0xffffff) 167 return (0); 168 val |= parts[0] << 24; 169 break; 170 171 case 3: /* a.b.c -- 8.8.16 bits */ 172 if (val > 0xffff) 173 return (0); 174 val |= (parts[0] << 24) | (parts[1] << 16); 175 break; 176 177 case 4: /* a.b.c.d -- 8.8.8.8 bits */ 178 if (val > 0xff) 179 return (0); 180 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 181 break; 182 } 183 if (addr) 184 addr->s_addr = htonl(val); 185 return (1); 186} 187 188/* these are compatibility routines, not needed on recent BSD releases */ 189 190/* 191 * Ascii internet address interpretation routine. 192 * The value returned is in network order. 193 */ 194#if 0 195inet_addr(cp) 196 const char *cp; 197{ 198 struct in_addr val; 199 200 if (inet_aton(cp, &val)) 201 return (val.s_addr); 202 return (0xffffffff); 203} 204#endif 205