1/* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if defined(LIBC_SCCS) && !defined(lint) 31static const char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93"; 32 33/* the algorithms only can deal with ASCII, so we optimize for it */ 34#define USE_ASCII 35 36#endif /* LIBC_SCCS and not lint */ 37#include <sys/cdefs.h> 38__FBSDID("$FreeBSD: src/lib/libc/inet/inet_network.c,v 1.5 2008/01/14 22:55:20 cperciva Exp $"); 39 40#include "port_before.h" 41 42#include <sys/types.h> 43#include <netinet/in.h> 44#include <arpa/inet.h> 45#include <ctype.h> 46 47#include "port_after.h" 48 49/*% 50 * Internet network address interpretation routine. 51 * The library routines call this routine to interpret 52 * network numbers. 53 */ 54in_addr_t 55inet_network(cp) 56 const char *cp; 57{ 58 in_addr_t val, base, n; 59 char c; 60 in_addr_t parts[4], *pp = parts; 61 int i, digit; 62 63again: 64 val = 0; base = 10; digit = 0; 65 if (*cp == '0') 66 digit = 1, base = 8, cp++; 67 if (*cp == 'x' || *cp == 'X') 68 base = 16, cp++; 69 while ((c = *cp) != 0) { 70 if (isdigit((unsigned char)c)) { 71 if (base == 8U && (c == '8' || c == '9')) 72 return (INADDR_NONE); 73 val = (val * base) + (c - '0'); 74 cp++; 75 digit = 1; 76 continue; 77 } 78 if (base == 16U && isxdigit((unsigned char)c)) { 79 val = (val << 4) + 80 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 81 cp++; 82 digit = 1; 83 continue; 84 } 85 break; 86 } 87 if (!digit) 88 return (INADDR_NONE); 89 if (pp >= parts + 4 || val > 0xffU) 90 return (INADDR_NONE); 91 if (*cp == '.') { 92 *pp++ = val, cp++; 93 goto again; 94 } 95 if (*cp && !isspace(*cp&0xff)) 96 return (INADDR_NONE); 97 *pp++ = val; 98 n = pp - parts; 99 if (n > 4U) 100 return (INADDR_NONE); 101 for (val = 0, i = 0; i < n; i++) { 102 val <<= 8; 103 val |= parts[i] & 0xff; 104 } 105 return (val); 106} 107 108/* 109 * Weak aliases for applications that use certain private entry points, 110 * and fail to include <arpa/inet.h>. 111 */ 112#undef inet_network 113__weak_reference(__inet_network, inet_network); 114 115/*! \file */ 116