1/* 2 * Copyright (c) 1983, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/* 31 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 32 * 33 * Permission to use, copy, modify, and distribute this software for any 34 * purpose with or without fee is hereby granted, provided that the above 35 * copyright notice and this permission notice appear in all copies, and that 36 * the name of Digital Equipment Corporation not be used in advertising or 37 * publicity pertaining to distribution of the document or software without 38 * specific, written prior permission. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 42 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 47 * SOFTWARE. 48 */ 49 50/* 51 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 52 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 53 * 54 * Permission to use, copy, modify, and distribute this software for any 55 * purpose with or without fee is hereby granted, provided that the above 56 * copyright notice and this permission notice appear in all copies. 57 * 58 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 59 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 60 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 61 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 62 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 63 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 64 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 65 */ 66 67#if defined(LIBC_SCCS) && !defined(lint) 68static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; 69static const char rcsid[] = "$Id: inet_addr.c,v 1.4.18.1 2005/04/27 05:00:52 sra Exp $"; 70#endif /* LIBC_SCCS and not lint */ 71 72/* the algorithms only can deal with ASCII, so we optimize for it */ 73#define USE_ASCII 74 75#include <sys/cdefs.h> 76__FBSDID("$FreeBSD: src/lib/libc/inet/inet_addr.c,v 1.4 2007/06/03 17:20:26 ume Exp $"); 77 78#include "port_before.h" 79 80#include <sys/types.h> 81#include <sys/param.h> 82 83#include <netinet/in.h> 84#include <arpa/inet.h> 85 86#include <ctype.h> 87 88#include "port_after.h" 89 90/*% 91 * Ascii internet address interpretation routine. 92 * The value returned is in network order. 93 */ 94in_addr_t /* XXX should be struct in_addr :( */ 95inet_addr(const char *cp) { 96 struct in_addr val; 97 98 if (inet_aton(cp, &val)) 99 return (val.s_addr); 100 return (INADDR_NONE); 101} 102 103/*% 104 * Check whether "cp" is a valid ascii representation 105 * of an Internet address and convert to a binary address. 106 * Returns 1 if the address is valid, 0 if not. 107 * This replaces inet_addr, the return value from which 108 * cannot distinguish between failure and a local broadcast address. 109 * strict == 1 disallows trailing characters. 110 */ 111int 112_inet_aton_check(const char *cp, struct in_addr *addr, int strict) 113{ 114 u_long val; 115 int base, n; 116 char c; 117 u_int8_t parts[4]; 118 u_int8_t *pp = parts; 119 int digit; 120 121 c = *cp; 122 for (;;) { 123 /* 124 * Collect number up to ``.''. 125 * Values are specified as for C: 126 * 0x=hex, 0=octal, isdigit=decimal. 127 */ 128 if (!isdigit((unsigned char)c)) 129 return (0); 130 val = 0; base = 10; digit = 0; 131 if (c == '0') { 132 c = *++cp; 133 if (c == 'x' || c == 'X') 134 base = 16, c = *++cp; 135 else { 136 base = 8; 137 digit = 1 ; 138 } 139 } 140 for (;;) { 141 if (isascii(c) && isdigit((unsigned char)c)) { 142 if (base == 8 && (c == '8' || c == '9')) 143 return (0); 144 val = (val * base) + (c - '0'); 145 c = *++cp; 146 digit = 1; 147 } else if (base == 16 && isascii(c) && 148 isxdigit((unsigned char)c)) { 149 val = (val << 4) | 150 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 151 c = *++cp; 152 digit = 1; 153 } else 154 break; 155 } 156 if (c == '.') { 157 /* 158 * Internet format: 159 * a.b.c.d 160 * a.b.c (with c treated as 16 bits) 161 * a.b (with b treated as 24 bits) 162 */ 163 if (pp >= parts + 3 || val > 0xffU) 164 return (0); 165 *pp++ = val; 166 c = *++cp; 167 } else 168 break; 169 } 170 /* 171 * Check for trailing characters. 172 */ 173 if (c != '\0') { 174 if (strict) return (0); 175 if (!isascii(c) || !isspace(c)) return (0); 176 } 177 /* 178 * Did we get a valid digit? 179 */ 180 if (!digit) 181 return (0); 182 /* 183 * Concoct the address according to 184 * the number of parts specified. 185 */ 186 n = pp - parts + 1; 187 switch (n) { 188 case 1: /*%< a -- 32 bits */ 189 break; 190 191 case 2: /*%< a.b -- 8.24 bits */ 192 if (val > 0xffffffU) 193 return (0); 194 val |= parts[0] << 24; 195 break; 196 197 case 3: /*%< a.b.c -- 8.8.16 bits */ 198 if (val > 0xffffU) 199 return (0); 200 val |= (parts[0] << 24) | (parts[1] << 16); 201 break; 202 203 case 4: /*%< a.b.c.d -- 8.8.8.8 bits */ 204 if (val > 0xffU) 205 return (0); 206 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 207 break; 208 } 209 if (addr != NULL) 210 addr->s_addr = htonl(val); 211 return (1); 212} 213 214int 215inet_aton(const char *cp, struct in_addr *addr) 216{ 217 return _inet_aton_check(cp, addr, 0); 218} 219 220/* 221 * Weak aliases for applications that use certain private entry points, 222 * and fail to include <arpa/inet.h>. 223 */ 224#undef inet_addr 225__weak_reference(__inet_addr, inet_addr); 226#undef inet_aton 227__weak_reference(__inet_aton, inet_aton); 228 229/*! \file */ 230