text: /*
   * 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.
   * 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 const char sccsid[] = "@(#)inet_netof.c	8.1 (Berkeley) 6/4/93";
  #endif /* LIBC_SCCS and not lint */
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/lib/libc/inet/inet_netof.c 288038 2015-09-20 20:50:56Z rodrigc $");
  
  #include "port_before.h"
  
  #include <sys/param.h>
  #include <netinet/in.h>
  #include <arpa/inet.h>
  
  #include "port_after.h"
  
  /*%
   * Return the network number from an internet
   * address; handles class a/b/c network #'s.
   */
  in_addr_t
  inet_netof(struct in_addr in)
  {
  	in_addr_t i = ntohl(in.s_addr);
  
  	if (IN_CLASSA(i))
  		return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT);
  	else if (IN_CLASSB(i))
  		return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
  	else
  		return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
  }
  
  /*
   * Weak aliases for applications that use certain private entry points,
   * and fail to include <arpa/inet.h>.
   */
  #undef inet_netof
  __weak_reference(__inet_netof, inet_netof);
  
  /*! \file */
  