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 char rcsid[] = "$OpenBSD: inet_network.c,v 1.7 1997/07/09 01:08:37 millert Exp $"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <sys/types.h> 39 #include <netinet/in.h> 40 #include <arpa/inet.h> 41 #include <ctype.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(cp) 50 register const char *cp; 51 { 52 register in_addr_t val, base, n; 53 register char c; 54 in_addr_t parts[4], *pp = parts; 55 register int i; 56 57 again: 58 val = 0; base = 10; 59 if (*cp == '0') 60 base = 8, cp++; 61 if (*cp == 'x' || *cp == 'X') 62 base = 16, cp++; 63 while ((c = *cp)) { 64 if (isdigit(c)) { 65 val = (val * base) + (c - '0'); 66 cp++; 67 continue; 68 } 69 if (base == 16 && isxdigit(c)) { 70 val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); 71 cp++; 72 continue; 73 } 74 break; 75 } 76 if (*cp == '.') { 77 if (pp >= parts + 3) 78 return (INADDR_NONE); 79 *pp++ = val, cp++; 80 goto again; 81 } 82 if (*cp && !isspace(*cp)) 83 return (INADDR_NONE); 84 *pp++ = val; 85 n = pp - parts; 86 for (val = 0, i = 0; i < 4; i++) { 87 val <<= 8; 88 if (i < n) 89 val |= parts[i] & 0xff; 90 } 91 return (val); 92 } 93