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
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.
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]
23 * Copyright 1983 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
27 #pragma ident "%Z%%M% %I% %E% SMI"
29 #include <sys/types.h>
30 #include <netinet/in.h>
33 * Return the network number from an internet
34 * address; handles class a/b/c network #'s.
37 inet_netof(struct in_addr in
)
39 u_long i
= ntohl(in
.s_addr
);
42 return (((i
)&IN_CLASSA_NET
) >> IN_CLASSA_NSHIFT
);
43 else if (IN_CLASSB(i
))
44 return (((i
)&IN_CLASSB_NET
) >> IN_CLASSB_NSHIFT
);
46 return (((i
)&IN_CLASSC_NET
) >> IN_CLASSC_NSHIFT
);