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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 36 * 37 * Permission to use, copy, modify, and distribute this software for any 38 * purpose with or without fee is hereby granted, provided that the above 39 * copyright notice and this permission notice appear in all copies, and that 40 * the name of Digital Equipment Corporation not be used in advertising or 41 * publicity pertaining to distribution of the document or software without 42 * specific, written prior permission. 43 * 44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 46 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 51 * SOFTWARE. 52 */ 53 54 /* 55 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 56 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 57 * 58 * Permission to use, copy, modify, and distribute this software for any 59 * purpose with or without fee is hereby granted, provided that the above 60 * copyright notice and this permission notice appear in all copies. 61 * 62 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 63 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 64 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 65 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 66 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 67 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 68 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 69 */ 70 71 #if defined(LIBC_SCCS) && !defined(lint) 72 static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; 73 static const char rcsid[] = "$Id: inet_addr.c,v 1.2.206.2 2004/03/17 00:29:45 marka Exp $"; 74 #endif /* LIBC_SCCS and not lint */ 75 #include <sys/cdefs.h> 76 __FBSDID("$FreeBSD$"); 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 */ 94 in_addr_t /* XXX should be struct in_addr :( */ 95 inet_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 */ 110 int 111 inet_aton(const char *cp, struct in_addr *addr) { 112 u_long val; 113 int base, n; 114 char c; 115 u_int8_t parts[4]; 116 u_int8_t *pp = parts; 117 int digit; 118 119 c = *cp; 120 for (;;) { 121 /* 122 * Collect number up to ``.''. 123 * Values are specified as for C: 124 * 0x=hex, 0=octal, isdigit=decimal. 125 */ 126 if (!isdigit((unsigned char)c)) 127 return (0); 128 val = 0; base = 10; digit = 0; 129 if (c == '0') { 130 c = *++cp; 131 if (c == 'x' || c == 'X') 132 base = 16, c = *++cp; 133 else { 134 base = 8; 135 digit = 1 ; 136 } 137 } 138 for (;;) { 139 if (isascii(c) && isdigit((unsigned char)c)) { 140 if (base == 8 && (c == '8' || c == '9')) 141 return (0); 142 val = (val * base) + (c - '0'); 143 c = *++cp; 144 digit = 1; 145 } else if (base == 16 && isascii(c) && 146 isxdigit((unsigned char)c)) { 147 val = (val << 4) | 148 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 149 c = *++cp; 150 digit = 1; 151 } else 152 break; 153 } 154 if (c == '.') { 155 /* 156 * Internet format: 157 * a.b.c.d 158 * a.b.c (with c treated as 16 bits) 159 * a.b (with b treated as 24 bits) 160 */ 161 if (pp >= parts + 3 || val > 0xffU) 162 return (0); 163 *pp++ = val; 164 c = *++cp; 165 } else 166 break; 167 } 168 /* 169 * Check for trailing characters. 170 */ 171 if (c != '\0' && (!isascii(c) || !isspace((unsigned char)c))) 172 return (0); 173 /* 174 * Did we get a valid digit? 175 */ 176 if (!digit) 177 return (0); 178 /* 179 * Concoct the address according to 180 * the number of parts specified. 181 */ 182 n = pp - parts + 1; 183 switch (n) { 184 case 1: /* a -- 32 bits */ 185 break; 186 187 case 2: /* a.b -- 8.24 bits */ 188 if (val > 0xffffffU) 189 return (0); 190 val |= parts[0] << 24; 191 break; 192 193 case 3: /* a.b.c -- 8.8.16 bits */ 194 if (val > 0xffffU) 195 return (0); 196 val |= (parts[0] << 24) | (parts[1] << 16); 197 break; 198 199 case 4: /* a.b.c.d -- 8.8.8.8 bits */ 200 if (val > 0xffU) 201 return (0); 202 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 203 break; 204 } 205 if (addr != NULL) 206 addr->s_addr = htonl(val); 207 return (1); 208 } 209 210 /* 211 * Weak aliases for applications that use certain private entry points, 212 * and fail to include <arpa/inet.h>. 213 */ 214 #undef inet_addr 215 __weak_reference(__inet_addr, inet_addr); 216 #undef inet_aton 217 __weak_reference(__inet_aton, inet_aton); 218