text: /*-
   * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   *
   * Copyright (c) 2009 Hiroki Sato.  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.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR OR HIS RELATIVES 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 MIND, 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.
   */
  
  #ifndef lint
  static const char rcsid[] =
    "$FreeBSD$";
  #endif
  
  #include <sys/param.h>
  #include <sys/ioctl.h>
  #include <sys/socket.h>
  #include <sys/sockio.h>
  
  #include <stdlib.h>
  #include <unistd.h>
  
  #include <net/ethernet.h>
  #include <net/if.h>
  #include <net/if_gif.h>
  #include <net/route.h>
  
  #include <ctype.h>
  #include <stdio.h>
  #include <string.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <err.h>
  #include <errno.h>
  
  #include "ifconfig.h"
  
  #define	GIFBITS	"\020\2IGNORE_SOURCE"
  
  static void	gif_status(int);
  
  static void
  gif_status(int s)
  {
  	int opts;
  
  	ifr.ifr_data = (caddr_t)&opts;
  	if (ioctl(s, GIFGOPTS, &ifr) == -1)
  		return;
  	if (opts == 0)
  		return;
  	printb("\toptions", opts, GIFBITS);
  	putchar('\n');
  }
  
  static void
  setgifopts(const char *val, int d, int s, const struct afswtch *afp)
  {
  	int opts;
  
  	ifr.ifr_data = (caddr_t)&opts;
  	if (ioctl(s, GIFGOPTS, &ifr) == -1) {
  		warn("ioctl(GIFGOPTS)");
  		return;
  	}
  
  	if (d < 0)
  		opts &= ~(-d);
  	else
  		opts |= d;
  
  	if (ioctl(s, GIFSOPTS, &ifr) == -1) {
  		warn("ioctl(GIFSOPTS)");
  		return;
  	}
  }
  
  static struct cmd gif_cmds[] = {
  	DEF_CMD("ignore_source",	GIF_IGNORE_SOURCE,	setgifopts),
  	DEF_CMD("-ignore_source",	-GIF_IGNORE_SOURCE,	setgifopts),
  };
  
  static struct afswtch af_gif = {
  	.af_name	= "af_gif",
  	.af_af		= AF_UNSPEC,
  	.af_other_status = gif_status,
  };
  
  static __constructor void
  gif_ctor(void)
  {
  	size_t i;
  
  	for (i = 0; i < nitems(gif_cmds); i++)
  		cmd_register(&gif_cmds[i]);
  	af_register(&af_gif);
  }
  