/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
* 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 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 AUTHOR 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.
*/
#include <sys/time.h>
#include <sys/socket.h>
#include <stdio.h>
#include <unistd.h>
#include "probe.h"
#include "log.h"
#include "id.h"
struct probe probe;
/* Does select() alter the passed time value ? */
static int
select_changes_time(void)
{
struct timeval t;
t.tv_sec = 0;
t.tv_usec = 100000;
select(0, NULL, NULL, NULL, &t);
return t.tv_usec != 100000;
}
#ifndef NOINET6
static int
ipv6_available(void)
{
int s;
if ((s = ID0socket(PF_INET6, SOCK_DGRAM, 0)) == -1)
return 0;
close(s);
return 1;
}
#endif
void
probe_Init(void)
{
probe.select_changes_time = select_changes_time() ? 1 : 0;
log_Printf(LogDEBUG, "Select changes time: %s\n",
probe.select_changes_time ? "yes" : "no");
#ifndef NOINET6
probe.ipv6_available = ipv6_available() ? 1 : 0;
log_Printf(LogDEBUG, "IPv6 available: %s\n",
probe.ipv6_available ? "yes" : "no");
#endif
}
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