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Diffstat (limited to 'src/probe.c')
-rw-r--r-- | src/probe.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/probe.c b/src/probe.c new file mode 100644 index 0000000..6719e11 --- /dev/null +++ b/src/probe.c @@ -0,0 +1,78 @@ +/*- + * 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 +} |