#!/bin/bash
# Configures this VM to be be node Y in topology X
#
# Example usage (on guest):
#    vn-deploynode 3 2
# deploys node 2 in topology 3
#
# A third option is available to change the virtual network IP
# address range from 192.168 to whatever is specified, e.g.:
#   vn-deploynode 3 2 10.173
# deploys node 2 in topology 3 with addresses being 10.173.x.y
# instead of 192.168.x.y.

# For more info see: http://sandilands.info/sgordon/virtnet
#
# $Revision$
# $Author$
# $Date$
# $URL$

# Input parameters
# topology
topology=`echo $1 | sed 's/^0*//'`

# node number
nodenum=`echo $2 | sed 's/^0*//'`

# Add leading 0's where necessary
if [ ${topology} -lt 10 ]; then
	topology="0${topology}"
fi
if [ ${nodenum} -lt 10 ]; then
	nodenum="0${nodenum}"
fi

echo ${topology}
node=`echo ${nodenum} | sed 's/^0*//'`

# Set the hostname
sudo bash /home/network/virtnet/bin/vn-sethostname base node${node}

# Copy interfaces
sudo cp /home/network/virtnet/data/topologies/interfaces-topology-${topology}-node-${nodenum} /etc/network/interfaces

# If a 3rd parameter is passed, use it to change the network mask
if [ -n "$3" ]; then
	ip1=`echo $3 | cut -d . -f 1`
	ip2=`echo $3 | cut -d . -f 2`

	if [ ${ip1} -lt 255 -a ${ip2} -lt 255 ]; then
		sudo sed -i 's/192\.168\./'${3}'\./g' /etc/network/interfaces
	fi
fi

# Count the number of interfaces
numif=`grep "iface eth" /home/network/virtnet/data/topologies/interfaces-topology-${topology}-node-${nodenum} | grep -v "#iface eth" | grep -c "static"`

# If more than 1 interface, then enable router
if [ ${numif} -gt 1 ];
then
	sudo sed -i 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/' /etc/sysctl.conf
fi 

# Message for user to reboot
echo "You should now reboot by typing:"
echo "  sudo reboot"