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# ifdef __STDC__ 70# define __P(x) x 71# else 72# define __P(x) () 73# endif 74#endif 75#ifndef linux 76int inet_aton __P((const char *, struct in_addr *)); 77 78/* 79 * Because the ctype(3) posix definition, if used "safely" in code everywhere, 80 * would mean all normal code that walks through strings needed casts. Yuck. 81 */ 82#define ISALNUM(x) isalnum((u_char)(x)) 83#define ISALPHA(x) isalpha((u_char)(x)) 84#define ISASCII(x) isascii((u_char)(x)) 85#define ISDIGIT(x) isdigit((u_char)(x)) 86#define ISPRINT(x) isprint((u_char)(x)) 87#define ISSPACE(x) isspace((u_char)(x)) 88#define ISUPPER(x) isupper((u_char)(x)) 89#define ISXDIGIT(x) isxdigit((u_char)(x)) 90#define ISLOWER(x) islower((u_char)(x)) 91 92/* 93 * Check whether "cp" is a valid ascii representation 94 * of an Internet address and convert to a binary address. 95 * Returns 1 if the address is valid, 0 if not. 96 * This replaces inet_addr, the return value from which 97 * cannot distinguish between failure and a local broadcast address. 98 */ 99int 100inet_aton(cp, addr) 101 register const char *cp; 102 struct in_addr *addr; 103{ 104 register u_long val; 105 register int base, n; 106 register char c; 107 u_int parts[4]; 108 register u_int *pp = parts; 109 110 c = *cp; 111 for (;;) { 112 /* 113 * Collect number up to ``.''. 114 * Values are specified as for C: 115 * 0x=hex, 0=octal, isdigit=decimal. 116 */ 117 if (!ISDIGIT(c)) 118 return (0); 119 val = 0; base = 10; 120 if (c == '0') { 121 c = *++cp; 122 if (c == 'x' || c == 'X') 123 base = 16, c = *++cp; 124 else 125 base = 8; 126 } 127 for (;;) { 128 if (ISASCII(c) && ISDIGIT(c)) { 129 val = (val * base) + (c - '0'); 130 c = *++cp; 131 } else if (base == 16 && ISASCII(c) && ISXDIGIT(c)) { 132 val = (val << 4) | 133 (c + 10 - (ISLOWER(c) ? 'a' : 'A')); 134 c = *++cp; 135 } else 136 break; 137 } 138 if (c == '.') { 139 /* 140 * Internet format: 141 * a.b.c.d 142 * a.b.c (with c treated as 16 bits) 143 * a.b (with b treated as 24 bits) 144 */ 145 if (pp >= parts + 3) 146 return (0); 147 *pp++ = val; 148 c = *++cp; 149 } else 150 break; 151 } 152 /* 153 * Check for trailing characters. 154 */ 155 if (c != '\0' && (!ISASCII(c) || !ISSPACE(c))) 156 return (0); 157 /* 158 * Concoct the address according to 159 * the number of parts specified. 160 */ 161 n = pp - parts + 1; 162 switch (n) { 163 164 case 0: 165 return (0); /* initial nondigit */ 166 167 case 1: /* a -- 32 bits */ 168 break; 169 170 case 2: /* a.b -- 8.24 bits */ 171 if (val > 0xffffff) 172 return (0); 173 val |= parts[0] << 24; 174 break; 175 176 case 3: /* a.b.c -- 8.8.16 bits */ 177 if (val > 0xffff) 178 return (0); 179 val |= (parts[0] << 24) | (parts[1] << 16); 180 break; 181 182 case 4: /* a.b.c.d -- 8.8.8.8 bits */ 183 if (val > 0xff) 184 return (0); 185 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 186 break; 187 } 188 if (addr) 189 addr->s_addr = htonl(val); 190 return (1); 191} 192#endif 193 194/* these are compatibility routines, not needed on recent BSD releases */ 195 196/* 197 * Ascii internet address interpretation routine. 198 * The value returned is in network order. 199 */ 200#if 0 201inet_addr(cp) 202 const char *cp; 203{ 204 struct in_addr val; 205 206 if (inet_aton(cp, &val)) 207 return (val.s_addr); 208 return (0xffffffff); 209} 210#endif 211