1 /** @File 2 Return the local network address portion of an internet address. 3 4 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials are licensed and made available under 6 the terms and conditions of the BSD License that accompanies this distribution. 7 The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 * Copyright (c) 1983, 1993 14 * The Regents of the University of California. All rights reserved. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 40 NetBSD: inet_lnaof.c,v 1.1 2004/05/20 23:13:02 christos Exp 41 inet_lnaof.c 8.1 (Berkeley) 6/4/93 42 **/ 43 #include <LibConfig.h> 44 45 #include "namespace.h" 46 #include <sys/param.h> 47 #include <netinet/in.h> 48 #include <arpa/inet.h> 49 50 #ifdef __weak_alias __weak_alias(inet_lnaof,_inet_lnaof)51 __weak_alias(inet_lnaof,_inet_lnaof) 52 #endif 53 54 /* 55 * Return the local network address portion of an 56 * internet address; handles class a/b/c network 57 * number formats. 58 */ 59 in_addr_t 60 inet_lnaof(struct in_addr in) 61 { 62 in_addr_t i = ntohl(in.s_addr); 63 64 if (IN_CLASSA(i)) 65 return ((i)&IN_CLASSA_HOST); 66 else if (IN_CLASSB(i)) 67 return ((i)&IN_CLASSB_HOST); 68 else 69 return ((i)&IN_CLASSC_HOST); 70 } 71