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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static const char sccsid[] = "@(#)inet_network.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 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 u_long 53 inet_network(cp) 54 register const char *cp; 55 { 56 register u_long val, base, n, i; 57 register char c; 58 u_long parts[4], *pp = parts; 59 int digit; 60 61 again: 62 val = 0; base = 10; digit = 0; 63 if (*cp == '0') 64 digit = 1, base = 8, cp++; 65 if (*cp == 'x' || *cp == 'X') 66 base = 16, cp++; 67 while ((c = *cp) != 0) { 68 if (isdigit((unsigned char)c)) { 69 if (base == 8U && (c == '8' || c == '9')) 70 return (INADDR_NONE); 71 val = (val * base) + (c - '0'); 72 cp++; 73 digit = 1; 74 continue; 75 } 76 if (base == 16U && isxdigit((unsigned char)c)) { 77 val = (val << 4) + 78 (c + 10 - (islower((unsigned char)c) ? 'a' : 'A')); 79 cp++; 80 digit = 1; 81 continue; 82 } 83 break; 84 } 85 if (!digit) 86 return (INADDR_NONE); 87 if (pp >= parts + 4 || val > 0xffU) 88 return (INADDR_NONE); 89 if (*cp == '.') { 90 *pp++ = val, cp++; 91 goto again; 92 } 93 if (*cp && !isspace(*cp&0xff)) 94 return (INADDR_NONE); 95 *pp++ = val; 96 n = pp - parts; 97 if (n > 4U) 98 return (INADDR_NONE); 99 for (val = 0, i = 0; i < n; i++) { 100 val <<= 8; 101 val |= parts[i] & 0xff; 102 } 103 return (val); 104 } 105 106 /*! \file */ 107