| /*- |
| * 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. |
| * |
| * $FreeBSD: src/usr.sbin/ppp/probe.c,v 1.6.40.1 2010/12/21 17:10:29 kensmith Exp $ |
| */ |
| |
| #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() |
| { |
| 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 |
| } |