10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 50Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 60Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 70Sstevel@tonic-gate * with the License. 80Sstevel@tonic-gate * 90Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 100Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 110Sstevel@tonic-gate * See the License for the specific language governing permissions 120Sstevel@tonic-gate * and limitations under the License. 130Sstevel@tonic-gate * 140Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 150Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 160Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 170Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 180Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 190Sstevel@tonic-gate * 200Sstevel@tonic-gate * CDDL HEADER END 210Sstevel@tonic-gate */ 22*722Smuffin /* 23*722Smuffin * Copyright 1983 Sun Microsystems, Inc. All rights reserved. 24*722Smuffin * Use is subject to license terms. 25*722Smuffin */ 26*722Smuffin 270Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 280Sstevel@tonic-gate 290Sstevel@tonic-gate #include <sys/types.h> 300Sstevel@tonic-gate #include <netinet/in.h> 310Sstevel@tonic-gate 320Sstevel@tonic-gate /* 330Sstevel@tonic-gate * Return the network number from an internet 340Sstevel@tonic-gate * address; handles class a/b/c network #'s. 350Sstevel@tonic-gate */ 36*722Smuffin int 37*722Smuffin inet_netof(struct in_addr in) 380Sstevel@tonic-gate { 39*722Smuffin u_long i = ntohl(in.s_addr); 400Sstevel@tonic-gate 410Sstevel@tonic-gate if (IN_CLASSA(i)) 420Sstevel@tonic-gate return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT); 430Sstevel@tonic-gate else if (IN_CLASSB(i)) 440Sstevel@tonic-gate return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT); 450Sstevel@tonic-gate else 460Sstevel@tonic-gate return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT); 470Sstevel@tonic-gate } 48