1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 #pragma ident "%Z%%M% %I% %E% SMI" 23 /* from UCB 4.3 82/11/14 */ 24 25 #include <sys/types.h> 26 #include <netinet/in.h> 27 28 /* 29 * Return the local network address portion of an 30 * internet address; handles class a/b/c network 31 * number formats. 32 */ 33 inet_lnaof(in) 34 struct in_addr in; 35 { 36 register u_long i = ntohl(in.s_addr); 37 38 if (IN_CLASSA(i)) 39 return ((i)&IN_CLASSA_HOST); 40 else if (IN_CLASSB(i)) 41 return ((i)&IN_CLASSB_HOST); 42 else 43 return ((i)&IN_CLASSC_HOST); 44 } 45