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