#!/bin/sh
#
# $Id$
#
# This script sets up the network + Network FS environment if needed.
#


# number of ping
ipcount=3

# Get info from config file
ipdev=`grep netfs-dev /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
# MAC address in uppercases
hwaddr=`grep netfs-client-hwaddr /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2- | tr '[a-z]' '[A-Z]'`
ipaddress=`grep netfs-client-ipaddr /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
ipnetmask=`grep netfs-client-netmask /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
ipbroadcast=`grep netfs-client-broadcast /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
ipgateway=`grep netfs-client-defgw /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
proto=`grep netfs-proto /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
iproute=`grep netfs-route /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
ipconf=""
ipmode="STATIC"
pre=""
post=""
export netfsmount=`grep netfs-server-mount /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
export imgname=`grep iso-prefix /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
if [ "$imgname" = "" ]; then
	export imgname="mondorescue"
fi
export dirimg=`grep iso-dir /tmp/mondorestore.cfg 2> /dev/null | cut -d' ' -f2-`
if [ "$dirimg" = "" ]; then
	export dirimg="/"
fi

# info from cmdline are predominent
for i in `cat /proc/cmdline` ; do
	echo $i | grep -qi ping= && ipcount=`echo $i | cut -d= -f2`
	echo $i | grep -qi hwaddr= && hwaddr=`echo $i | cut -d= -f2  | tr '[a-z]' '[A-Z]'`
	echo $i | grep -qi ipconf= && ipconf=`echo $i | cut -d= -f2`
	echo $i | grep -qi netfsmount= && export netfsmount=`echo $i | cut -d= -f2`
	echo $i | grep -qi netfsopt= && export netfsopt=`echo $i | cut -d= -f2`
	echo $i | grep -qi prefix= && export imgname=`echo $i | cut -d= -f2`
	echo $i | grep -qi netfspath= && export dirimg=`echo $i | cut -d= -f2`
	echo $i | grep -qi pre= && pre=`echo $i | cut -d= -f2`
	echo $i | grep -qi post= && post=`echo $i | cut -d= -f2`
	echo $i | grep -qi proto= && proto=`echo $i | cut -d= -f2`
	echo $i | grep -qi iproute= && iproute=`echo $i | cut -d= -f2`
	echo $i | grep -qi ipmode= && ipmode=`echo $i | cut -d= -f2`
done

if [ "$ipdev" != "" ] || [ "$ipconf" != "" ]; then
	# Network configuration stored during archive
	# or on cmdline so network wanted => starting it
	LogIt "INFO: Starting Network..."

	# Activate loobback
	ifconfig lo 127.0.0.1

	# ipconf has priority
	if [ "$ipconf" != "" ]; then
		echo "$ipconf" | grep -q "dhcp"
		if [ $? -eq 0 ]; then
			ipdev=`echo $ipconf | cut -d: -f1`
			ipmode="DHCP"
		else
			ipdev=`echo $ipconf | cut -d: -f1`
			ipaddress=`echo $ipconf | cut -d: -f2`
			ipnetmask=`echo $ipconf | cut -d: -f3`
			ipbroadcast=`echo $ipconf | cut -d: -f4`
			ipgateway=`echo $ipconf | cut -d: -f5`
		fi
	else
		# Now relying on ipdev which isn't empty
		# ipmode is either STATIC by default or DHCP if a parameter was passed
		# If same system, map to the right MAC address

		# Look at our previous device
		hwaddr_found=`ifconfig $ipdev 2> /dev/null | grep HWaddr | awk '{print $NF}' | tr '[a-z]' '[A-Z]'`
		if [ "$hwaddr_found" != "" ]; then
			# That device always exists
			if [ "$hwaddr" = "$hwaddr_found" ]; then
				# No renaming took place use it
				LogIt "INFO: Using device $ipdev (Mac Addr: $hwaddr_found)"
			fi
		else
			# maybe there was a change of NIC numbering e.g. 
			# and the one used at backup doesn't exist anymore
			# ipdev is not good anymore probably
			oldipdev=$ipdev

			for hwdev in `ifconfig -a | grep HWaddr | awk '{print $1}'` ; do
				mac=`ifconfig $hwdev | grep HWaddr | awk '{print $NF}' | tr '[a-z]' '[A-Z]'`
				if [ "$hwaddr" = "$mac" ]; then
					# This is the new device for the MAC address of our card at backup time
					LogIt "INFO: Interface with MAC address $hwaddr changed from $ipdev to $hwdev"
					LogIt "INFO: Using $hwdev for network configuration from now on"
					ipdev=$hwdev
					break
				fi
			done

			if [ "$oldipdev" = "$ipdev" ]; then
				# We didn't find a new device for this MAC and it doesn't exist
				# Take the first interface and hope it's good
				ipdev=`ifconfig -a | grep HWaddr | awk '{print $1}' | head -1`
				LogIt "WARN: Using $ipdev as no device matches the MAC address $hwaddr"
			fi
		fi
	fi

	if [ "$ipmode" = "DHCP" ]; then
		LogIt "INFO: Making DHCP request on $ipdev"
		udhcpc -i $ipdev
	else
		LogIt "INFO: Configuring $ipdev statically ($ipaddress/$ipnetmask/$ipgateway)"
		ifconfig $ipdev $ipaddress netmask $ipnetmask broadcast $ipbroadcast
		route add default gw $ipgateway
	fi
	# Leave time to the stack to wake up (reported by some users)
	sleep 5

	# Handle a potential static route
	if [ _"$iproute" != _"" ]; then
		iproute=`echo $iproute | sed -i 's/:/ /g'`
		LogIt "INFO: Adding static route with route add $iproute"
		route add $iproute
	fi

	# ping server helps waking interface up
	LogIt "INFO: Pinging Remote server..."
	netfs_server_ipaddr=`echo $netfsmount | cut -d: -f1 | cut -d@ -f2`
	ping -c $ipcount $netfs_server_ipaddr 

	# Which is our protocol for file sharing
	if [ "$proto" = "" ]; then
		LogIt "WARN: No protocol specified, defaulting to NFS"
		proto="nfs"
	fi

	if [ "$proto" = "sshfs" ]; then
		LogIt "INFO: Mounting SSHFS share ($netfsmount) on /tmp/isodir..."
		# We need a correct console for ssh
		ln -sf /dev/console /dev/tty
		sshfs -o ro,StrictHostKeyChecking=no $netfsopt $netfsmount /tmp/isodir
	elif [ "$proto" = "smbfs" ]; then
		LogIt "INFO: Mounting SMBFS share ($netfsmount) on /tmp/isodir..."
		mount -t cifs $netfsmount /tmp/isodir -o ro $netfsopt 
	elif [ "$proto" != "" ]; then
		if [ -x /sbin/rpcbind ]; then
			echo "Starting rpcbind daemon..."
			mkdir -p /var/cache/rpcbind /var/lib/rpcbind
			/sbin/rpcbind -w &
		fi
		LogIt "INFO: Mounting Network share ($netfsmount) on /tmp/isodir..."
		touch /etc/mtab
		mount -t $proto -o nolock,ro $netfsopt $netfsmount /tmp/isodir
	else
		LogIt "ERROR: Unknown protocol $proto"
	fi
	
	LogIt "INFO: Mounting Remote image ${imgname}-1.iso in $dirimg on /mnt/cdrom in loopback"
	mount -o ro,loop -t iso9660 /tmp/isodir/$dirimg/${imgname}-1.iso /mnt/cdrom

	# Save the scripts on the Network share locally
	if [ "`echo $pre | grep -E '^/tmp/isodir'`" ]; then
		cp $pre /tmp
		LogIt "INFO: Copying $pre under /tmp"
	fi
	if [ "`echo $post | grep -E '^/tmp/isodir'`" ]; then
		cp $post /tmp
		LogIt "INFO: Copying $post under /tmp"
	fi
fi