tinc/debian/init.d

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#! /usr/bin/perl -w
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#
# System startup script for tinc
# $Id: init.d,v 1.4 2000/05/15 09:41:34 guus Exp $
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#
my $DAEMON="/usr/sbin/tincd";
my $NAME="tinc";
my $DESC="tinc daemons";
my $TCONF="/etc/tinc";
my $EXTRA="";
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# $NETS is a space seperated list of all tinc networks.
my $NETS="";
if ("$NETS" eq "") { print "No tinc networks configured."; exit 0; }
if (! -f $DAEMON) { exit 0; }
##############################################################################
# vpn_load () Loads VPN configuration
#
# $_[0] ... VPN to load
sub vpn_load {
my @addr;
$CFG="$TCONF/$_[0]/tinc.conf";
open($CFG, "< $CFG") || die "tinc: $CFG does not exist";
# load TINCD config
while(<$CFG>) {
if( /^[ ]*TapDevice[ =]+([^ \#]+)/i ) {
$DEV=$1;
chomp($DEV);
$DEV =~ s/^.*\/([^\/0-9]+)([0-9]+)$/$1$2/;
$NUM = $2;
} elsif ( /^[ ]*(MyOwnVPNIP|MyVirtualIP)[ =]+([^ \#]+)/i ) {
$VPN=$2;
chomp($VPN);
}
}
if(!defined($DEV)) {
die "tinc: There must be a TapDevice";
}
if($DEV eq "") {
die "tinc: TapDevice should be of the form /dev/tapN";
}
if(!defined($VPN)) {
die "tinc: MyVirtualIP required";
}
if($VPN eq "") {
die "tinc: No argument to MyVirtualIP/MyOwnVPNIP";
}
$ADR = $VPN;
$ADR =~ s/^([^\/]+)\/.*$/$1/;
$LEN = $VPN;
$LEN =~ s/^.*\/([^\/]+)$/$1/;
if($ADR eq "" || $LEN eq "") {
die "tinc: Badly formed MyVirtualIP/MyOwnVPNIP";
}
@addr = split(/\./, $ADR);
$ADR = pack('C4', @addr);
$MSK = pack('N4', -1 << (32 - $LEN));
$BRD = join(".", unpack('C4', $ADR | ~$MSK));
# $NET = join(".", unpack('C4', $ADR & $MSK));
$MAC = "fe:fd:" . join(":", map { sprintf "%02x", $_ } unpack('C4', $ADR));
$ADR = join(".", unpack('C4', $ADR));
$MSK = join(".", unpack('C4', $MSK));
# print "$DEV $VPN $NUM $LEN @addr $MAC $MASK $BRD $NET\n";
1;
}
##############################################################################
# vpn_start () starts specified VPN
#
# $_[0] ... VPN to start
sub vpn_start {
vpn_load($_[0]) || die "tinc: could not vpn_load $_[0]";
if (! -c "/dev/$DEV") {
if (-e "/dev/$DEV") {
unlink("/dev/$DEV");
}
$num = $NUM + 16;
system("echo mknod --mode=0600 /dev/$DEV c 36 $num");
}
system("insmod ethertap -s --name=\"ethertap$NUM\" unit=\"$NUM\" >/dev/null");
system("ifconfig $DEV hw ether $MAC");
system("ifconfig $DEV $ADR netmask $MSK broadcast $BRD");
system("start-stop-daemon --start --quiet --pidfile /var/run/$NAME.$_[0].pid --exec $DAEMON -- -n $_[0] $EXTRA");
}
##############################################################################
# vpn_stop () Stops specified VPN
#
# $1 ... VPN to stop
sub vpn_stop {
vpn_load($_[0]) || return 1;
system("start-stop-daemon --stop --quiet --pidfile /var/run/$NAME.$_[0].pid --exec $DAEMON -- -n $_[0] $EXTRA -k");
system("ifconfig $DEV down");
system("rmmod ethertap$NUM -s");
}
if(!defined($ARGV[0])) {
die "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload}\n";
}
if($ARGV[0] eq "start") {
print "Starting $DESC:";
foreach $n (split(" ", $NETS)) {
print " $n";
vpn_start($n);
}
print ".\n";
} elsif ($ARGV[0] eq "stop") {
print "Stopping $DESC:";
foreach $n (split(" ", $NETS)) {
print " $n";
vpn_stop($n);
}
print ".\n";
} elsif ($ARGV[0] eq "restart" || $ARGV[0] eq "force-reload") {
print "Stopping $DESC:";
foreach $n (split(" ", $NETS)) {
print " $n";
vpn_stop($n);
}
print ".\n";
print "Starting $DESC:";
foreach $n (split(" ", $NETS)) {
print " $n";
vpn_start($n);
}
print ".\n";
} else {
die "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload}\n";
}