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) 31 static const char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "port_before.h" 37 38 #include <sys/types.h> 39 #include <netinet/in.h> 40 #include <arpa/inet.h> 41 #include <ctype.h> 42 43 #include "port_after.h" 44 45 /*% 46 * Internet network address interpretation routine. 47 * The library routines call this routine to interpret 48 * network numbers. 49 */ 50 in_addr_t 51 inet_network(const char *cp) 52 { 53 in_addr_t val, base, n; 54 char c; 55 in_addr_t parts[4], *pp = parts; 56 int i, digit; 57 58 again: 59 val = 0; base = 10; digit = 0; 60 if (*cp == '0') 61 digit = 1, base = 8, cp++; 62 if (*cp == 'x' || *cp == 'X') 63 base = 16, cp++; 64 while ((c = *cp) != 0) { 65 if (isdigit((unsigned char)c)) { 66 if (base == 8U && (c == '8' || c == '9')) 67 return (INADDR_NONE); 68 val = (val * base) + (c - '0'); 69 cp++; 70 digit = 1; 71 continue; 72 } 73 if (base == 16U && isxdigit((unsigned char)c)) { 74 val = (val << 4) + 75 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 76 cp++; 77 digit = 1; 78 continue; 79 } 80 break; 81 } 82 if (!digit) 83 return (INADDR_NONE); 84 if (pp >= parts + 4 || val > 0xffU) 85 return (INADDR_NONE); 86 if (*cp == '.') { 87 *pp++ = val, cp++; 88 goto again; 89 } 90 if (*cp && !isspace(*cp&0xff)) 91 return (INADDR_NONE); 92 *pp++ = val; 93 n = pp - parts; 94 if (n > 4U) 95 return (INADDR_NONE); 96 for (val = 0, i = 0; i < n; i++) { 97 val <<= 8; 98 val |= parts[i] & 0xff; 99 } 100 return (val); 101 } 102 103 /* 104 * Weak aliases for applications that use certain private entry points, 105 * and fail to include <arpa/inet.h>. 106 */ 107 #undef inet_network 108 __weak_reference(__inet_network, inet_network); 109 110 /*! \file */ 111