17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 22*5d54f3d8Smuffin /* 23*5d54f3d8Smuffin * Copyright 1983 Sun Microsystems, Inc. All rights reserved. 24*5d54f3d8Smuffin * Use is subject to license terms. 25*5d54f3d8Smuffin */ 26*5d54f3d8Smuffin 277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #include <sys/types.h> 307c478bd9Sstevel@tonic-gate #include <netinet/in.h> 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate /* 337c478bd9Sstevel@tonic-gate * Return the network number from an internet 347c478bd9Sstevel@tonic-gate * address; handles class a/b/c network #'s. 357c478bd9Sstevel@tonic-gate */ 36*5d54f3d8Smuffin int 37*5d54f3d8Smuffin inet_netof(struct in_addr in) 387c478bd9Sstevel@tonic-gate { 39*5d54f3d8Smuffin u_long i = ntohl(in.s_addr); 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate if (IN_CLASSA(i)) 427c478bd9Sstevel@tonic-gate return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT); 437c478bd9Sstevel@tonic-gate else if (IN_CLASSB(i)) 447c478bd9Sstevel@tonic-gate return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT); 457c478bd9Sstevel@tonic-gate else 467c478bd9Sstevel@tonic-gate return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT); 477c478bd9Sstevel@tonic-gate } 48