1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 23*0Sstevel@tonic-gate /* from UCB 4.3 82/11/14 */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate #include <sys/types.h> 26*0Sstevel@tonic-gate #include <netinet/in.h> 27*0Sstevel@tonic-gate 28*0Sstevel@tonic-gate /* 29*0Sstevel@tonic-gate * Return the network number from an internet 30*0Sstevel@tonic-gate * address; handles class a/b/c network #'s. 31*0Sstevel@tonic-gate */ 32*0Sstevel@tonic-gate inet_netof(in) 33*0Sstevel@tonic-gate struct in_addr in; 34*0Sstevel@tonic-gate { 35*0Sstevel@tonic-gate register u_long i = ntohl(in.s_addr); 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate if (IN_CLASSA(i)) 38*0Sstevel@tonic-gate return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT); 39*0Sstevel@tonic-gate else if (IN_CLASSB(i)) 40*0Sstevel@tonic-gate return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT); 41*0Sstevel@tonic-gate else 42*0Sstevel@tonic-gate return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT); 43*0Sstevel@tonic-gate } 44