1 /* 2 * ++Copyright++ 1983, 1990, 1993 3 * - 4 * Copyright (c) 1983, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 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 * --Copyright-- 54 */ 55 56 #if !defined(lint) 57 static const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; 58 static const char rcsid[] = "@(#)$Id: inet_addr.c,v 1.8.2.3 2004/12/09 19:41:20 darrenr Exp $"; 59 #endif /* LIBC_SCCS and not lint */ 60 61 #include <sys/param.h> 62 #include <netinet/in.h> 63 #include <arpa/inet.h> 64 #include <ctype.h> 65 66 #ifndef __P 67 # ifdef __STDC__ 68 # define __P(x) x 69 # else 70 # define __P(x) () 71 # endif 72 #endif 73 #ifndef linux 74 int inet_aton __P((const char *, struct in_addr *)); 75 76 /* 77 * Because the ctype(3) posix definition, if used "safely" in code everywhere, 78 * would mean all normal code that walks through strings needed casts. Yuck. 79 */ 80 #define ISALNUM(x) isalnum((u_char)(x)) 81 #define ISALPHA(x) isalpha((u_char)(x)) 82 #define ISASCII(x) isascii((u_char)(x)) 83 #define ISDIGIT(x) isdigit((u_char)(x)) 84 #define ISPRINT(x) isprint((u_char)(x)) 85 #define ISSPACE(x) isspace((u_char)(x)) 86 #define ISUPPER(x) isupper((u_char)(x)) 87 #define ISXDIGIT(x) isxdigit((u_char)(x)) 88 #define ISLOWER(x) islower((u_char)(x)) 89 90 /* 91 * Check whether "cp" is a valid ascii representation 92 * of an Internet address and convert to a binary address. 93 * Returns 1 if the address is valid, 0 if not. 94 * This replaces inet_addr, the return value from which 95 * cannot distinguish between failure and a local broadcast address. 96 */ 97 int 98 inet_aton(cp, addr) 99 register const char *cp; 100 struct in_addr *addr; 101 { 102 register u_long val; 103 register int base, n; 104 register char c; 105 u_int parts[4]; 106 register u_int *pp = parts; 107 108 c = *cp; 109 for (;;) { 110 /* 111 * Collect number up to ``.''. 112 * Values are specified as for C: 113 * 0x=hex, 0=octal, isdigit=decimal. 114 */ 115 if (!ISDIGIT(c)) 116 return (0); 117 val = 0; base = 10; 118 if (c == '0') { 119 c = *++cp; 120 if (c == 'x' || c == 'X') 121 base = 16, c = *++cp; 122 else 123 base = 8; 124 } 125 for (;;) { 126 if (ISASCII(c) && ISDIGIT(c)) { 127 val = (val * base) + (c - '0'); 128 c = *++cp; 129 } else if (base == 16 && ISASCII(c) && ISXDIGIT(c)) { 130 val = (val << 4) | 131 (c + 10 - (ISLOWER(c) ? 'a' : 'A')); 132 c = *++cp; 133 } else 134 break; 135 } 136 if (c == '.') { 137 /* 138 * Internet format: 139 * a.b.c.d 140 * a.b.c (with c treated as 16 bits) 141 * a.b (with b treated as 24 bits) 142 */ 143 if (pp >= parts + 3) 144 return (0); 145 *pp++ = val; 146 c = *++cp; 147 } else 148 break; 149 } 150 /* 151 * Check for trailing characters. 152 */ 153 if (c != '\0' && (!ISASCII(c) || !ISSPACE(c))) 154 return (0); 155 /* 156 * Concoct the address according to 157 * the number of parts specified. 158 */ 159 n = pp - parts + 1; 160 switch (n) { 161 162 case 0: 163 return (0); /* initial nondigit */ 164 165 case 1: /* a -- 32 bits */ 166 break; 167 168 case 2: /* a.b -- 8.24 bits */ 169 if (val > 0xffffff) 170 return (0); 171 val |= parts[0] << 24; 172 break; 173 174 case 3: /* a.b.c -- 8.8.16 bits */ 175 if (val > 0xffff) 176 return (0); 177 val |= (parts[0] << 24) | (parts[1] << 16); 178 break; 179 180 case 4: /* a.b.c.d -- 8.8.8.8 bits */ 181 if (val > 0xff) 182 return (0); 183 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 184 break; 185 } 186 if (addr) 187 addr->s_addr = htonl(val); 188 return (1); 189 } 190 #endif 191 192 /* these are compatibility routines, not needed on recent BSD releases */ 193 194 /* 195 * Ascii internet address interpretation routine. 196 * The value returned is in network order. 197 */ 198 #if 0 199 inet_addr(cp) 200 const char *cp; 201 { 202 struct in_addr val; 203 204 if (inet_aton(cp, &val)) 205 return (val.s_addr); 206 return (0xffffffff); 207 } 208 #endif 209