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root/cebix/BasiliskII/src/Unix/tunconfig

Comparing BasiliskII/src/Unix/tunconfig (file contents):
Revision 1.1 by gbeauche, 2004-05-09T16:11:45Z vs.
Revision 1.2 by gbeauche, 2005-05-14T16:08:17Z

#	Line 11 | Line 11
11		# If the linux box is configured as a firewall, the rules below might
12		# need some adjustments.
13		#
14	+	# The IP Tunnel driver requires IP forwarding to be enabled. Run as root:
15	+	#
16	+	#       echo 1 >/proc/sys/net/ipv4/ip_forward
17	+	#
18		###########################################################################
19
20		SUDO=/usr/bin/sudo
21	+	IFCONFIG=/sbin/ifconfig
22		IPTABLES=/sbin/iptables
23
24		#########################################################
25
26	+	[[ "x$1" = "x-n" ]] && {
27	+	DONT_EXECUTE=yes
28	+	shift 1
29	+	}
30	+
31		TUN_DEV=$1
32		ACTION=$2
33
#	Line 31 | Line 41 | TUN_HOST=172.20.$NET_NUM.1
41		#########################################################
42
43		[[ $# = 2 ]] || {
44	<	echo "Usage: tunconfig iface up|down"
44	>	echo "Usage: tunconfig [-n] iface up|down"
45		exit 2
46		}
47
48		[[ "`id -u`" = "0" ]] && {
49	<	echo "---> $SUDO not necessary." 1>&2
50	<	SUDO=""
49	>	echo "---> $SUDO not necessary." 1>&2
50	>	SUDO=""
51		}
52
53	<	[[ -x $IPTABLES ]] && {
44	<	IPTABLES="$SUDO $IPTABLES"
45	<	} || {
53	>	[[ -x $IPTABLES ]] || {
54		echo "---> $IPTABLES not found." 1>&2
55	<	IPTABLES=/bin/true
55	>	exit 1
56		}
57
58	+	if [ -n "$SUDO" ]; then
59	+	$SUDO -l | grep -q "NOPASSWD: $IFCONFIG" || {
60	+	echo "---> Missing sudo NOPASSWD: $IFCONFIG." 1>&2
61	+	exit 1
62	+	}
63	+	$SUDO -l | grep -q "NOPASSWD: $IPTABLES" || {
64	+	echo "---> Missing sudo NOPASSWD: $IPTABLES." 1>&2
65	+	exit 1
66	+	}
67	+	IFCONFIG="$SUDO $IFCONFIG"
68	+	IPTABLES="$SUDO $IPTABLES"
69	+	fi
70	+
71	+	[[ "x$DONT_EXECUTE" = "xyes" ]] && exit 0
72	+
73		$IPTABLES -L -n -t nat > /dev/null || exit 1
74
75		#########################################################
#	Line 62 | Line 85 | $IPTABLES -L -n -t nat > /dev/null || ex
85		#########################################################
86
87		[[ "$ACTION" = down ]] && {
88	<	$SUDO /sbin/ifconfig $TUN_DEV down
88	>	$IFCONFIG $TUN_DEV down
89		}
90
91		#########################################################
#	Line 70 | Line 93 | $IPTABLES -L -n -t nat > /dev/null || ex
93		#########################################################
94
95		[[ "$ACTION" = up ]] && {
96	<	$SUDO /sbin/ifconfig $TUN_DEV $TUN_HOST
96	>	$IFCONFIG $TUN_DEV $TUN_HOST
97
98		# masquerade the tun network
99		$IPTABLES -t nat -A POSTROUTING -s $TUN_NET -d ! $TUN_NET -j MASQUERADE

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