1156952Sume/* 2156952Sume * Copyright (c) 1983, 1990, 1993 3156952Sume * The Regents of the University of California. All rights reserved. 4156952Sume * 5156952Sume * Redistribution and use in source and binary forms, with or without 6156952Sume * modification, are permitted provided that the following conditions 7156952Sume * are met: 8156952Sume * 1. Redistributions of source code must retain the above copyright 9156952Sume * notice, this list of conditions and the following disclaimer. 10156952Sume * 2. Redistributions in binary form must reproduce the above copyright 11156952Sume * notice, this list of conditions and the following disclaimer in the 12156952Sume * documentation and/or other materials provided with the distribution. 13156952Sume * 4. Neither the name of the University nor the names of its contributors 14156952Sume * may be used to endorse or promote products derived from this software 15156952Sume * without specific prior written permission. 16156952Sume * 17156952Sume * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18156952Sume * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19156952Sume * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20156952Sume * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21156952Sume * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22156952Sume * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23156952Sume * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24156952Sume * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25156952Sume * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26156952Sume * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27156952Sume * SUCH DAMAGE. 28156952Sume */ 29156952Sume 30156952Sume/* 31156952Sume * Portions Copyright (c) 1993 by Digital Equipment Corporation. 32156952Sume * 33156952Sume * Permission to use, copy, modify, and distribute this software for any 34156952Sume * purpose with or without fee is hereby granted, provided that the above 35156952Sume * copyright notice and this permission notice appear in all copies, and that 36156952Sume * the name of Digital Equipment Corporation not be used in advertising or 37156952Sume * publicity pertaining to distribution of the document or software without 38156952Sume * specific, written prior permission. 39156952Sume * 40156952Sume * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 41156952Sume * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 42156952Sume * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 43156952Sume * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 44156952Sume * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 45156952Sume * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 46156952Sume * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 47156952Sume * SOFTWARE. 48156952Sume */ 49156952Sume 50156952Sume/* 51156952Sume * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 52156952Sume * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 53156952Sume * 54156952Sume * Permission to use, copy, modify, and distribute this software for any 55156952Sume * purpose with or without fee is hereby granted, provided that the above 56156952Sume * copyright notice and this permission notice appear in all copies. 57156952Sume * 58156952Sume * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 59156952Sume * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 60156952Sume * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 61156952Sume * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 62156952Sume * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 63156952Sume * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 64156952Sume * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 65156952Sume */ 66156952Sume 67156952Sume#if defined(LIBC_SCCS) && !defined(lint) 68156952Sumestatic const char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93"; 69170244Sumestatic const char rcsid[] = "$Id: inet_addr.c,v 1.4.18.1 2005/04/27 05:00:52 sra Exp $"; 70156952Sume#endif /* LIBC_SCCS and not lint */ 71156956Sume#include <sys/cdefs.h> 72156956Sume__FBSDID("$FreeBSD$"); 73156952Sume 74156952Sume#include "port_before.h" 75156952Sume 76156952Sume#include <sys/types.h> 77156952Sume#include <sys/param.h> 78156952Sume 79156952Sume#include <netinet/in.h> 80156952Sume#include <arpa/inet.h> 81156952Sume 82156952Sume#include <ctype.h> 83156952Sume 84156952Sume#include "port_after.h" 85156952Sume 86170244Sume/*% 87156952Sume * Ascii internet address interpretation routine. 88156952Sume * The value returned is in network order. 89156952Sume */ 90156956Sumein_addr_t /* XXX should be struct in_addr :( */ 91156952Sumeinet_addr(const char *cp) { 92156952Sume struct in_addr val; 93156952Sume 94156952Sume if (inet_aton(cp, &val)) 95156952Sume return (val.s_addr); 96156952Sume return (INADDR_NONE); 97156952Sume} 98156952Sume 99170244Sume/*% 100156952Sume * Check whether "cp" is a valid ascii representation 101156952Sume * of an Internet address and convert to a binary address. 102156952Sume * Returns 1 if the address is valid, 0 if not. 103156952Sume * This replaces inet_addr, the return value from which 104156952Sume * cannot distinguish between failure and a local broadcast address. 105156952Sume */ 106156952Sumeint 107156952Sumeinet_aton(const char *cp, struct in_addr *addr) { 108156952Sume u_long val; 109156952Sume int base, n; 110156952Sume char c; 111156952Sume u_int8_t parts[4]; 112156952Sume u_int8_t *pp = parts; 113156952Sume int digit; 114156952Sume 115156952Sume c = *cp; 116156952Sume for (;;) { 117156952Sume /* 118156952Sume * Collect number up to ``.''. 119156952Sume * Values are specified as for C: 120156952Sume * 0x=hex, 0=octal, isdigit=decimal. 121156952Sume */ 122156952Sume if (!isdigit((unsigned char)c)) 123156952Sume return (0); 124156952Sume val = 0; base = 10; digit = 0; 125156952Sume if (c == '0') { 126156952Sume c = *++cp; 127156952Sume if (c == 'x' || c == 'X') 128156952Sume base = 16, c = *++cp; 129156952Sume else { 130156952Sume base = 8; 131156952Sume digit = 1 ; 132156952Sume } 133156952Sume } 134156952Sume for (;;) { 135156952Sume if (isascii(c) && isdigit((unsigned char)c)) { 136156952Sume if (base == 8 && (c == '8' || c == '9')) 137156952Sume return (0); 138156952Sume val = (val * base) + (c - '0'); 139156952Sume c = *++cp; 140156952Sume digit = 1; 141156952Sume } else if (base == 16 && isascii(c) && 142156952Sume isxdigit((unsigned char)c)) { 143156952Sume val = (val << 4) | 144156952Sume (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 145156952Sume c = *++cp; 146156952Sume digit = 1; 147156952Sume } else 148156952Sume break; 149156952Sume } 150156952Sume if (c == '.') { 151156952Sume /* 152156952Sume * Internet format: 153156952Sume * a.b.c.d 154156952Sume * a.b.c (with c treated as 16 bits) 155156952Sume * a.b (with b treated as 24 bits) 156156952Sume */ 157156952Sume if (pp >= parts + 3 || val > 0xffU) 158156952Sume return (0); 159156952Sume *pp++ = val; 160156952Sume c = *++cp; 161156952Sume } else 162156952Sume break; 163156952Sume } 164156952Sume /* 165156952Sume * Check for trailing characters. 166156952Sume */ 167156952Sume if (c != '\0' && (!isascii(c) || !isspace((unsigned char)c))) 168156952Sume return (0); 169156952Sume /* 170156952Sume * Did we get a valid digit? 171156952Sume */ 172156952Sume if (!digit) 173156952Sume return (0); 174156952Sume /* 175156952Sume * Concoct the address according to 176156952Sume * the number of parts specified. 177156952Sume */ 178156952Sume n = pp - parts + 1; 179156952Sume switch (n) { 180170244Sume case 1: /*%< a -- 32 bits */ 181156952Sume break; 182156952Sume 183170244Sume case 2: /*%< a.b -- 8.24 bits */ 184156952Sume if (val > 0xffffffU) 185156952Sume return (0); 186156952Sume val |= parts[0] << 24; 187156952Sume break; 188156952Sume 189170244Sume case 3: /*%< a.b.c -- 8.8.16 bits */ 190156952Sume if (val > 0xffffU) 191156952Sume return (0); 192156952Sume val |= (parts[0] << 24) | (parts[1] << 16); 193156952Sume break; 194156952Sume 195170244Sume case 4: /*%< a.b.c.d -- 8.8.8.8 bits */ 196156952Sume if (val > 0xffU) 197156952Sume return (0); 198156952Sume val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); 199156952Sume break; 200156952Sume } 201156952Sume if (addr != NULL) 202156952Sume addr->s_addr = htonl(val); 203156952Sume return (1); 204156952Sume} 205156956Sume 206156956Sume/* 207156956Sume * Weak aliases for applications that use certain private entry points, 208156956Sume * and fail to include <arpa/inet.h>. 209156956Sume */ 210156956Sume#undef inet_addr 211156956Sume__weak_reference(__inet_addr, inet_addr); 212156956Sume#undef inet_aton 213156956Sume__weak_reference(__inet_aton, inet_aton); 214170244Sume 215170244Sume/*! \file */ 216