1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static const char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include "port_before.h" 39 40 #include <sys/types.h> 41 #include <netinet/in.h> 42 #include <arpa/inet.h> 43 #include <ctype.h> 44 45 #include "port_after.h" 46 47 /*% 48 * Internet network address interpretation routine. 49 * The library routines call this routine to interpret 50 * network numbers. 51 */ 52 in_addr_t 53 inet_network(const char *cp) 54 { 55 in_addr_t val, base, n; 56 char c; 57 in_addr_t parts[4], *pp = parts; 58 int i, digit; 59 60 again: 61 val = 0; base = 10; digit = 0; 62 if (*cp == '0') 63 digit = 1, base = 8, cp++; 64 if (*cp == 'x' || *cp == 'X') 65 base = 16, cp++; 66 while ((c = *cp) != 0) { 67 if (isdigit((unsigned char)c)) { 68 if (base == 8U && (c == '8' || c == '9')) 69 return (INADDR_NONE); 70 val = (val * base) + (c - '0'); 71 cp++; 72 digit = 1; 73 continue; 74 } 75 if (base == 16U && isxdigit((unsigned char)c)) { 76 val = (val << 4) + 77 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 78 cp++; 79 digit = 1; 80 continue; 81 } 82 break; 83 } 84 if (!digit) 85 return (INADDR_NONE); 86 if (pp >= parts + 4 || val > 0xffU) 87 return (INADDR_NONE); 88 if (*cp == '.') { 89 *pp++ = val, cp++; 90 goto again; 91 } 92 if (*cp && !isspace(*cp&0xff)) 93 return (INADDR_NONE); 94 *pp++ = val; 95 n = pp - parts; 96 if (n > 4U) 97 return (INADDR_NONE); 98 for (val = 0, i = 0; i < n; i++) { 99 val <<= 8; 100 val |= parts[i] & 0xff; 101 } 102 return (val); 103 } 104 105 /* 106 * Weak aliases for applications that use certain private entry points, 107 * and fail to include <arpa/inet.h>. 108 */ 109 #undef inet_network 110 __weak_reference(__inet_network, inet_network); 111 112 /*! \file */ 113