mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
|
/*
|
||
|
|
* Copyright (c) 1983, 1993
|
||
|
|
* The Regents of the University of California. All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. All advertising materials mentioning features or use of this software
|
||
|
|
* must display the following acknowledgement:
|
||
|
|
* This product includes software developed by the University of
|
||
|
|
* California, Berkeley and its contributors.
|
||
|
|
* 4. Neither the name of the University nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||
|
|
static char sccsid[] = "@(#)inet_lnaof.c 8.1 (Berkeley) 6/4/93";
|
||
|
|
#endif /* LIBC_SCCS and not lint */
|
||
|
|
|
||
|
|
#include <sys/param.h>
|
||
|
|
#include <netinet/in.h>
|
||
|
|
#include <arpa/inet.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return the local network address portion of an
|
||
|
|
* internet address; handles class a/b/c network
|
||
|
|
* number formats.
|
||
|
|
*/
|
||
|
|
u_long
|
||
|
|
inet_lnaof(in)
|
||
|
|
struct in_addr in;
|
||
|
|
{
|
||
|
|
register u_long i = ntohl(in.s_addr);
|
||
|
|
|
||
|
|
if (IN_CLASSA(i))
|
||
|
|
return ((i)&IN_CLASSA_HOST);
|
||
|
|
else if (IN_CLASSB(i))
|
||
|
|
return ((i)&IN_CLASSB_HOST);
|
||
|
|
else
|
||
|
|
return ((i)&IN_CLASSC_HOST);
|
||
|
|
}
|