165e96449SHajimu UMEMOTO /* 265e96449SHajimu UMEMOTO * Copyright (c) 1983, 1993 365e96449SHajimu UMEMOTO * The Regents of the University of California. All rights reserved. 465e96449SHajimu UMEMOTO * 565e96449SHajimu UMEMOTO * Redistribution and use in source and binary forms, with or without 665e96449SHajimu UMEMOTO * modification, are permitted provided that the following conditions 765e96449SHajimu UMEMOTO * are met: 865e96449SHajimu UMEMOTO * 1. Redistributions of source code must retain the above copyright 965e96449SHajimu UMEMOTO * notice, this list of conditions and the following disclaimer. 1065e96449SHajimu UMEMOTO * 2. Redistributions in binary form must reproduce the above copyright 1165e96449SHajimu UMEMOTO * notice, this list of conditions and the following disclaimer in the 1265e96449SHajimu UMEMOTO * documentation and/or other materials provided with the distribution. 1365e96449SHajimu UMEMOTO * 3. All advertising materials mentioning features or use of this software 1465e96449SHajimu UMEMOTO * must display the following acknowledgement: 1565e96449SHajimu UMEMOTO * This product includes software developed by the University of 1665e96449SHajimu UMEMOTO * California, Berkeley and its contributors. 1765e96449SHajimu UMEMOTO * 4. Neither the name of the University nor the names of its contributors 1865e96449SHajimu UMEMOTO * may be used to endorse or promote products derived from this software 1965e96449SHajimu UMEMOTO * without specific prior written permission. 2065e96449SHajimu UMEMOTO * 2165e96449SHajimu UMEMOTO * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2265e96449SHajimu UMEMOTO * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2365e96449SHajimu UMEMOTO * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2465e96449SHajimu UMEMOTO * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2565e96449SHajimu UMEMOTO * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2665e96449SHajimu UMEMOTO * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2765e96449SHajimu UMEMOTO * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2865e96449SHajimu UMEMOTO * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2965e96449SHajimu UMEMOTO * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3065e96449SHajimu UMEMOTO * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3165e96449SHajimu UMEMOTO * SUCH DAMAGE. 3265e96449SHajimu UMEMOTO */ 3365e96449SHajimu UMEMOTO 3465e96449SHajimu UMEMOTO #if defined(LIBC_SCCS) && !defined(lint) 3565e96449SHajimu UMEMOTO static const char sccsid[] = "@(#)inet_lnaof.c 8.1 (Berkeley) 6/4/93"; 3665e96449SHajimu UMEMOTO #endif /* LIBC_SCCS and not lint */ 3765e96449SHajimu UMEMOTO 3865e96449SHajimu UMEMOTO #include "port_before.h" 3965e96449SHajimu UMEMOTO 4065e96449SHajimu UMEMOTO #include <sys/param.h> 4165e96449SHajimu UMEMOTO #include <netinet/in.h> 4265e96449SHajimu UMEMOTO #include <arpa/inet.h> 4365e96449SHajimu UMEMOTO 4465e96449SHajimu UMEMOTO #include "port_after.h" 4565e96449SHajimu UMEMOTO 4665e96449SHajimu UMEMOTO /* 4765e96449SHajimu UMEMOTO * Return the local network address portion of an 4865e96449SHajimu UMEMOTO * internet address; handles class a/b/c network 4965e96449SHajimu UMEMOTO * number formats. 5065e96449SHajimu UMEMOTO */ 5165e96449SHajimu UMEMOTO u_long 5265e96449SHajimu UMEMOTO inet_lnaof(in) 5365e96449SHajimu UMEMOTO struct in_addr in; 5465e96449SHajimu UMEMOTO { 5565e96449SHajimu UMEMOTO register u_long i = ntohl(in.s_addr); 5665e96449SHajimu UMEMOTO 5765e96449SHajimu UMEMOTO if (IN_CLASSA(i)) 5865e96449SHajimu UMEMOTO return ((i)&IN_CLASSA_HOST); 5965e96449SHajimu UMEMOTO else if (IN_CLASSB(i)) 6065e96449SHajimu UMEMOTO return ((i)&IN_CLASSB_HOST); 6165e96449SHajimu UMEMOTO else 6265e96449SHajimu UMEMOTO return ((i)&IN_CLASSC_HOST); 6365e96449SHajimu UMEMOTO } 64