1/* inet_aton - convert string to numeric IP address */ 2 3/* Snagged from GNU C library, version 2.0.3. */ 4 5/* 6 * ++Copyright++ 1983, 1990, 1993 7 * - 8 * Copyright (c) 1983, 1990, 1993 9 * The Regents of the University of California. All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * - 39 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 40 * 41 * Permission to use, copy, modify, and distribute this software for any 42 * purpose with or without fee is hereby granted, provided that the above 43 * copyright notice and this permission notice appear in all copies, and that 44 * the name of Digital Equipment Corporation not be used in advertising or 45 * publicity pertaining to distribution of the document or software without 46 * specific, written prior permission. 47 * 48 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 49 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 50 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 51 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 52 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 53 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 54 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 55 * SOFTWARE. 56 * - 57 * --Copyright-- 58 */ 59 60#if defined(LIBC_SCCS) && !defined(lint) 61static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; 62static char rcsid[] = "$Id: inet_aton.c 28305 2008-10-23 21:46:26Z bonefish $"; 63#endif /* LIBC_SCCS and not lint */ 64 65#include <config.h> 66 67#if !defined (HAVE_INET_ATON) && defined (HAVE_NETWORK) && defined (HAVE_NETINET_IN_H) && (defined (HAVE_ARPA_INET_H) || (defined(__BEOS__) || defined(__HAIKU__))) 68 69#include <sys/types.h> 70#include <sys/param.h> 71#include <netinet/in.h> 72#ifdef HAVE_ARPA_INET_H 73#include <arpa/inet.h> 74#endif 75 76#ifdef HAVE_UNISTD_H 77# include <unistd.h> 78#endif 79 80#include <bashansi.h> 81#include <ctype.h> 82#include <stdc.h> 83 84#ifndef INADDR_NONE 85# define INADDR_NONE 0xffffffff 86#endif 87 88/* these are compatibility routines, not needed on recent BSD releases */ 89 90#if 0 91/* Not used, not needed. */ 92/* 93 * Ascii internet address interpretation routine. 94 * The value returned is in network order. 95 */ 96u_long 97inet_addr(cp) 98 register const char *cp; 99{ 100 struct in_addr val; 101 102 if (inet_aton(cp, &val)) 103 return (val.s_addr); 104 return (INADDR_NONE); 105} 106#endif 107 108/* 109 * Check whether "cp" is a valid ascii representation 110 * of an Internet address and convert to a binary address. 111 * Returns 1 if the address is valid, 0 if not. 112 * This replaces inet_addr, the return value from which 113 * cannot distinguish between failure and a local broadcast address. 114 */ 115int 116inet_aton(cp, addr) 117 /*register*/ const char *cp; 118 struct in_addr *addr; 119{ 120 register u_bits32_t val; 121 register int base, n; 122 register unsigned char c; 123 u_int parts[4]; 124 register u_int *pp = parts; 125 126 c = *cp; 127 for (;;) { 128 /* 129 * Collect number up to ``.''. 130 * Values are specified as for C: 131 * 0x=hex, 0=octal, isdigit=decimal. 132 */ 133#if 0 134 if (!isdigit(c)) 135#else 136 if (c != '0' && c != '1' && c != '2' && c != '3' && c != '4' && 137 c != '5' && c != '6' && c != '7' && c != '8' && c != '9') 138#endif 139 return (0); 140 val = 0; base = 10; 141 if (c == '0') { 142 c = *++cp; 143 if (c == 'x' || c == 'X') 144 base = 16, c = *++cp; 145 else 146 base = 8; 147 } 148 for (;;) { 149 if (isascii(c) && isdigit(c)) { 150 val = (val * base) + (c - '0'); 151 c = *++cp; 152 } else if (base == 16 && isascii(c) && isxdigit(c)) { 153 val = (val << 4) | 154 (c + 10 - (islower(c) ? 'a' : 'A')); 155 c = *++cp; 156 } else 157 break; 158 } 159 if (c == '.') { 160 /* 161 * Internet format: 162 * a.b.c.d 163 * a.b.c (with c treated as 16 bits) 164 * a.b (with b treated as 24 bits) 165 */ 166 if (pp >= parts + 3) 167 return (0); 168 *pp++ = val; 169 c = *++cp; 170 } else 171 break; 172 } 173 /* 174 * Check for trailing characters. 175 */ 176 if (c != '\0' && (!isascii(c) || !isspace(c))) 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) { 184 185 case 0: 186 return (0); /* initial nondigit */ 187 188 case 1: /* a -- 32 bits */ 189 break; 190 191 case 2: /* a.b -- 8.24 bits */ 192 if (val > 0xffffff) 193 return (0); 194 val |= parts[0] << 24; 195 break; 196 197 case 3: /* a.b.c -- 8.8.16 bits */ 198 if (val > 0xffff) 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 > 0xff) 205 return (0); 206 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 207 break; 208 } 209 if (addr) 210 addr->s_addr = htonl(val); 211 return (1); 212} 213 214#endif /* !HAVE_INET_ATON */ 215