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) 68 static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; 69 static const char rcsid[] = "$Id: inet_addr.c,v 1.4.18.1 2005/04/27 05:00:52 sra Exp $"; 70 #endif /* LIBC_SCCS and not lint */ 71 #include <sys/cdefs.h> 72 __FBSDID("$FreeBSD$"); 73 74 #include "port_before.h" 75 76 #include <sys/types.h> 77 #include <sys/param.h> 78 79 #include <netinet/in.h> 80 #include <arpa/inet.h> 81 82 #include <ctype.h> 83 84 #include "port_after.h" 85 86 /*% 87 * Ascii internet address interpretation routine. 88 * The value returned is in network order. 89 */ 90 in_addr_t /* XXX should be struct in_addr :( */ 91 inet_addr(const char *cp) { 92 struct in_addr val; 93 94 if (inet_aton(cp, &val)) 95 return (val.s_addr); 96 return (INADDR_NONE); 97 } 98 99 /*% 100 * Check whether "cp" is a valid ascii representation 101 * of an Internet address and convert to a binary address. 102 * Returns 1 if the address is valid, 0 if not. 103 * This replaces inet_addr, the return value from which 104 * cannot distinguish between failure and a local broadcast address. 105 */ 106 int 107 inet_aton(const char *cp, struct in_addr *addr) { 108 u_long val; 109 int base, n; 110 char c; 111 u_int8_t parts[4]; 112 u_int8_t *pp = parts; 113 int digit; 114 115 c = *cp; 116 for (;;) { 117 /* 118 * Collect number up to ``.''. 119 * Values are specified as for C: 120 * 0x=hex, 0=octal, isdigit=decimal. 121 */ 122 if (!isdigit((unsigned char)c)) 123 return (0); 124 val = 0; base = 10; digit = 0; 125 if (c == '0') { 126 c = *++cp; 127 if (c == 'x' || c == 'X') 128 base = 16, c = *++cp; 129 else { 130 base = 8; 131 digit = 1 ; 132 } 133 } 134 for (;;) { 135 if (isascii(c) && isdigit((unsigned char)c)) { 136 if (base == 8 && (c == '8' || c == '9')) 137 return (0); 138 val = (val * base) + (c - '0'); 139 c = *++cp; 140 digit = 1; 141 } else if (base == 16 && isascii(c) && 142 isxdigit((unsigned char)c)) { 143 val = (val << 4) | 144 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 145 c = *++cp; 146 digit = 1; 147 } else 148 break; 149 } 150 if (c == '.') { 151 /* 152 * Internet format: 153 * a.b.c.d 154 * a.b.c (with c treated as 16 bits) 155 * a.b (with b treated as 24 bits) 156 */ 157 if (pp >= parts + 3 || val > 0xffU) 158 return (0); 159 *pp++ = val; 160 c = *++cp; 161 } else 162 break; 163 } 164 /* 165 * Check for trailing characters. 166 */ 167 if (c != '\0' && (!isascii(c) || !isspace((unsigned char)c))) 168 return (0); 169 /* 170 * Did we get a valid digit? 171 */ 172 if (!digit) 173 return (0); 174 /* 175 * Concoct the address according to 176 * the number of parts specified. 177 */ 178 n = pp - parts + 1; 179 switch (n) { 180 case 1: /*%< a -- 32 bits */ 181 break; 182 183 case 2: /*%< a.b -- 8.24 bits */ 184 if (val > 0xffffffU) 185 return (0); 186 val |= parts[0] << 24; 187 break; 188 189 case 3: /*%< a.b.c -- 8.8.16 bits */ 190 if (val > 0xffffU) 191 return (0); 192 val |= (parts[0] << 24) | (parts[1] << 16); 193 break; 194 195 case 4: /*%< a.b.c.d -- 8.8.8.8 bits */ 196 if (val > 0xffU) 197 return (0); 198 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 199 break; 200 } 201 if (addr != NULL) 202 addr->s_addr = htonl(val); 203 return (1); 204 } 205 206 /* 207 * Weak aliases for applications that use certain private entry points, 208 * and fail to include <arpa/inet.h>. 209 */ 210 #undef inet_addr 211 __weak_reference(__inet_addr, inet_addr); 212 #undef inet_aton 213 __weak_reference(__inet_aton, inet_aton); 214 215 /*! \file */ 216