1/* $NetBSD: inet_network.c,v 1.3 2008/01/19 03:46:52 ginsbach Exp $ */ 2 3/* 4 * Copyright (c) 1983, 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#if defined(LIBC_SCCS) && !defined(lint) 34#if 0 35static char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93"; 36#else 37__RCSID("$NetBSD: inet_network.c,v 1.3 2008/01/19 03:46:52 ginsbach Exp $"); 38#endif 39#endif /* LIBC_SCCS and not lint */ 40 41#include "namespace.h" 42#include <sys/types.h> 43#include <netinet/in.h> 44#include <arpa/inet.h> 45 46#include <assert.h> 47#include <ctype.h> 48#ifdef _DIAGNOSTIC 49#include <stddef.h> /* for NULL */ 50#endif 51 52#ifdef __weak_alias 53__weak_alias(inet_network,_inet_network) 54#endif 55 56/* 57 * Internet network address interpretation routine. 58 * The library routines call this routine to interpret 59 * network numbers. 60 */ 61in_addr_t 62inet_network(const char *cp) 63{ 64 in_addr_t val; 65 size_t i, n; 66 u_char c; 67 in_addr_t parts[4], *pp = parts; 68 int digit, base; 69 70 _DIAGASSERT(cp != NULL); 71 72again: 73 val = 0; base = 10; digit = 0; 74 if (*cp == '0') 75 digit = 1, base = 8, cp++; 76 if (*cp == 'x' || *cp == 'X') 77 digit = 0, base = 16, cp++; 78 while ((c = *cp) != 0) { 79 if (isdigit(c)) { 80 if (base == 8 && (c == '8' || c == '9')) 81 return (INADDR_NONE); 82 val = (val * base) + (c - '0'); 83 cp++; 84 digit = 1; 85 continue; 86 } 87 if (base == 16 && isxdigit(c)) { 88 val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); 89 cp++; 90 digit = 1; 91 continue; 92 } 93 break; 94 } 95 if (!digit) 96 return (INADDR_NONE); 97 if (pp >= parts + 4 || val > 0xff) 98 return (INADDR_NONE); 99 if (*cp == '.') { 100 *pp++ = val, cp++; 101 goto again; 102 } 103 if (*cp && !isspace((u_char) *cp)) 104 return (INADDR_NONE); 105 *pp++ = val; 106 n = pp - parts; 107 if (n > 4) 108 return (INADDR_NONE); 109 for (val = 0, i = 0; i < n; i++) { 110 val <<= 8; 111 val |= parts[i] & 0xff; 112 } 113 return (val); 114} 115