71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
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/* $NetBSD: inet_makeaddr.c,v 1.1 2004/05/20 23:13:02 christos Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)inet_makeaddr.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: inet_makeaddr.c,v 1.1 2004/05/20 23:13:02 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#ifdef __weak_alias
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__weak_alias(inet_makeaddr,_inet_makeaddr)
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#endif
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/*
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* Formulate an Internet address from network + host. Used in
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* building addresses stored in the ifnet structure.
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*/
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struct in_addr
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inet_makeaddr(in_addr_t net, in_addr_t host)
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{
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in_addr_t addr;
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struct in_addr ret;
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if (net < 128)
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addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
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else if (net < 65536)
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addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
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else if (net < 16777216L)
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addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
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else
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addr = net | host;
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ret.s_addr = htonl(addr);
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return ret;
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}
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