1331722Seadler/* 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"; 69269867Sumestatic const char rcsid[] = "$Id: inet_addr.c,v 1.5 2005/04/27 04:56:19 sra Exp $"; 70156952Sume#endif /* LIBC_SCCS and not lint */ 71156956Sume#include <sys/cdefs.h> 72156956Sume__FBSDID("$FreeBSD: stable/11/lib/libc/inet/inet_addr.c 338124 2018-08-21 01:17:28Z pfg $"); 73156952Sume 74156952Sume#include "port_before.h" 75156952Sume 76156952Sume#include <sys/param.h> 77156952Sume 78156952Sume#include <netinet/in.h> 79156952Sume#include <arpa/inet.h> 80156952Sume 81156952Sume#include <ctype.h> 82156952Sume 83156952Sume#include "port_after.h" 84156952Sume 85170244Sume/*% 86156952Sume * Ascii internet address interpretation routine. 87156952Sume * The value returned is in network order. 88156952Sume */ 89156956Sumein_addr_t /* XXX should be struct in_addr :( */ 90156952Sumeinet_addr(const char *cp) { 91156952Sume struct in_addr val; 92156952Sume 93156952Sume if (inet_aton(cp, &val)) 94156952Sume return (val.s_addr); 95156952Sume return (INADDR_NONE); 96156952Sume} 97156952Sume 98170244Sume/*% 99156952Sume * Check whether "cp" is a valid ascii representation 100156952Sume * of an Internet address and convert to a binary address. 101156952Sume * Returns 1 if the address is valid, 0 if not. 102156952Sume * This replaces inet_addr, the return value from which 103156952Sume * cannot distinguish between failure and a local broadcast address. 104156952Sume */ 105156952Sumeint 106156952Sumeinet_aton(const char *cp, struct in_addr *addr) { 107156952Sume u_long val; 108156952Sume int base, n; 109156952Sume char c; 110156952Sume u_int8_t parts[4]; 111156952Sume u_int8_t *pp = parts; 112156952Sume int digit; 113156952Sume 114156952Sume c = *cp; 115156952Sume for (;;) { 116156952Sume /* 117156952Sume * Collect number up to ``.''. 118156952Sume * Values are specified as for C: 119156952Sume * 0x=hex, 0=octal, isdigit=decimal. 120156952Sume */ 121156952Sume if (!isdigit((unsigned char)c)) 122156952Sume return (0); 123156952Sume val = 0; base = 10; digit = 0; 124156952Sume if (c == '0') { 125156952Sume c = *++cp; 126156952Sume if (c == 'x' || c == 'X') 127156952Sume base = 16, c = *++cp; 128156952Sume else { 129156952Sume base = 8; 130156952Sume digit = 1 ; 131156952Sume } 132156952Sume } 133156952Sume for (;;) { 134156952Sume if (isascii(c) && isdigit((unsigned char)c)) { 135156952Sume if (base == 8 && (c == '8' || c == '9')) 136156952Sume return (0); 137156952Sume val = (val * base) + (c - '0'); 138156952Sume c = *++cp; 139156952Sume digit = 1; 140156952Sume } else if (base == 16 && isascii(c) && 141156952Sume isxdigit((unsigned char)c)) { 142156952Sume val = (val << 4) | 143156952Sume (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 144156952Sume c = *++cp; 145156952Sume digit = 1; 146156952Sume } else 147156952Sume break; 148156952Sume } 149156952Sume if (c == '.') { 150156952Sume /* 151156952Sume * Internet format: 152156952Sume * a.b.c.d 153156952Sume * a.b.c (with c treated as 16 bits) 154156952Sume * a.b (with b treated as 24 bits) 155156952Sume */ 156156952Sume if (pp >= parts + 3 || val > 0xffU) 157156952Sume return (0); 158156952Sume *pp++ = val; 159156952Sume c = *++cp; 160156952Sume } else 161156952Sume break; 162156952Sume } 163156952Sume /* 164156952Sume * Check for trailing characters. 165156952Sume */ 166156952Sume if (c != '\0' && (!isascii(c) || !isspace((unsigned char)c))) 167156952Sume return (0); 168156952Sume /* 169156952Sume * Did we get a valid digit? 170156952Sume */ 171156952Sume if (!digit) 172156952Sume return (0); 173156952Sume /* 174156952Sume * Concoct the address according to 175156952Sume * the number of parts specified. 176156952Sume */ 177156952Sume n = pp - parts + 1; 178156952Sume switch (n) { 179170244Sume case 1: /*%< a -- 32 bits */ 180156952Sume break; 181156952Sume 182170244Sume case 2: /*%< a.b -- 8.24 bits */ 183156952Sume if (val > 0xffffffU) 184156952Sume return (0); 185338124Spfg val |= (uint32_t)parts[0] << 24; 186156952Sume break; 187156952Sume 188170244Sume case 3: /*%< a.b.c -- 8.8.16 bits */ 189156952Sume if (val > 0xffffU) 190156952Sume return (0); 191338124Spfg val |= ((uint32_t)parts[0] << 24) | (parts[1] << 16); 192156952Sume break; 193156952Sume 194170244Sume case 4: /*%< a.b.c.d -- 8.8.8.8 bits */ 195156952Sume if (val > 0xffU) 196156952Sume return (0); 197338124Spfg val |= ((uint32_t)parts[0] << 24) | (parts[1] << 16) | 198338124Spfg (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