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 * 3. 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 34 #include "port_before.h" 35 36 #include <sys/types.h> 37 #include <netinet/in.h> 38 #include <arpa/inet.h> 39 #include <ctype.h> 40 41 #include "port_after.h" 42 43 /*% 44 * Internet network address interpretation routine. 45 * The library routines call this routine to interpret 46 * network numbers. 47 */ 48 in_addr_t 49 inet_network(const char *cp) 50 { 51 in_addr_t val, base, n; 52 char c; 53 in_addr_t parts[4], *pp = parts; 54 int i, digit; 55 again: 56 val = 0; base = 10; digit = 0; 57 if (*cp == '0') 58 digit = 1, base = 8, cp++; 59 if (*cp == 'x' || *cp == 'X') 60 base = 16, cp++; 61 while ((c = *cp) != 0) { 62 if (isdigit((unsigned char)c)) { 63 if (base == 8U && (c == '8' || c == '9')) 64 return (INADDR_NONE); 65 val = (val * base) + (c - '0'); 66 cp++; 67 digit = 1; 68 continue; 69 } 70 if (base == 16U && isxdigit((unsigned char)c)) { 71 val = (val << 4) + 72 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 73 cp++; 74 digit = 1; 75 continue; 76 } 77 break; 78 } 79 if (!digit) 80 return (INADDR_NONE); 81 if (pp >= parts + 4 || val > 0xffU) 82 return (INADDR_NONE); 83 if (*cp == '.') { 84 *pp++ = val, cp++; 85 goto again; 86 } 87 if (*cp && !isspace(*cp&0xff)) 88 return (INADDR_NONE); 89 *pp++ = val; 90 n = pp - parts; 91 if (n > 4U) 92 return (INADDR_NONE); 93 for (val = 0, i = 0; i < n; i++) { 94 val <<= 8; 95 val |= parts[i] & 0xff; 96 } 97 return (val); 98 } 99 100 #ifdef _LIBC 101 /* 102 * Weak aliases for applications that use certain private entry points, 103 * and fail to include <arpa/inet.h>. 104 */ 105 #undef inet_network 106 __weak_reference(__inet_network, inet_network); 107 #endif 108 /*! \file */ 109