#!/bin/sh
#
# ifdown-sit
#
#
# Taken from:
# (P) & (C) 2000-2001 by Peter Bieringer <pb@bieringer.de>
#
# RHL integration assistance by Pekka Savola <pekkas@netcore.fi>
#
# Version 2001-07-15a
#
# Uses following information from /etc/sysconfig/network:
#  NETWORKING_IPV6=yes|no: controls IPv6 initialization (global setting)
#
# Uses following information from "/etc/sysconfig/network-scripts/ifcfg-$1":
#  For static tunnels
#  IPV6TUNNELIPV4="<ipv4 address of foreign tunnel endpoint>"
#  IPV6ADDR=<ipv6address>/<prefixlength> [OPTIONAL: numbered tunnels]
#


# Get global network configuration
. /etc/sysconfig/network 

# Source IPv4 helper functions
cd /etc/sysconfig/network-scripts
. network-functions 

CONFIG=$1
[ -f "$CONFIG" ] || CONFIG=ifcfg-$CONFIG
source_config                                                                   

# Test whether IPv6 should be configured, else stop
[ "${NETWORKING_IPV6}" = "yes" ] || exit 0

if [ ! -f /etc/sysconfig/network-scripts/network-functions-ipv6 ]; then
	exit 1
fi

# Source IPv6 helper functions
. /etc/sysconfig/network-scripts/network-functions-ipv6

# IPv6 test, no module loaded, exit if system is not IPv6-ready
test_ipv6 testonly || exit 0

# Delete IPv6-in-IPv4 tunnel(s)
if [ "$DEVICE" = "sit0" ]; then
	ifdown_ipv6_autotunnel
elif [ ! -z "$IPV6TUNNELIPV4" ]; then
	if [ "$IPV6_TUNNELMODE" = "NBMA" ]; then
        	if [ ! -z "$IPV6ADDR" ]; then
			ifdown_ipv6_real sit0 $IPV6ADDR
		fi

	    	# Cleanup all IPv6 tunnel configuration on specified interface and shut down sit0, if no longer used
		ifdown_ipv6_tunnel_all $DEVICE $IPV6TUNNELIPV4

        elif [ -z "$IPV6_TUNNELMODE" -o "$IPV6_TUNNELMODE" = "IP" ]; then
		# Delete all IPv6 routes and addresses
		ifdown_ipv6_real_all $DEVICE 

		# Shut down tunnel device
		ifdown_ipv6_tunneldev $DEVICE 
        else
		echo $"Tunnel creation mode '$IPV6_TUNNELMODE' not supported - skip!"
        fi
fi