#!/bin/sh

#-------------------------------------------------------------------------------------
#
# this script deconfigures the vlan on the node.
#  deconfigvlan <vlan_id>
#     if vlan_is is not specified, all the vlans defined 
#     for the given node will be deconfigured.
#
#-------------------------------------------------------------------------------------
if [[ -z $VLANMAXINDEX ]] || [[ $VLANMAXINDEX -eq 0 ]]; then
    logger -t xcat "deconfigvlan: Nothing to do."
    echo "deconfigvlan: Nothing to do." 
    exit 0
fi

if [[ $OSTYPE = linux* ]]; then
  if [[ $OSVER = sles* ]] || [[ $OSVER = suse* ]] || [[ -f /etc/SuSE-release ]]; then
      nwdir="/etc/sysconfig/network"
      isSLES=1
  else 
      nwdir="/etc/sysconfig/network-scripts"
  fi 
else
    logger -t xcat "deconfigvlan: Does not support AIX yet."
    echo "deconfigvlan: Does not support AIX yet." 
    exit 0
fi


if [[ -n "$1" ]]; then
    IN_VLAN=$1 #The vlan id to be deconfigured, if not specified, all will be deconfigured on this note. 
fi

index=1
while [ $index -le $VLANMAXINDEX ]; do
    nic=""
    eval VLANID=\$VLANID_$index
    if [[ -n $IN_VLAN ]]; then
	if [[ "$VLANID" != "$IN_VLAN" ]]; then
	    index=$((index+1))
	    continue
	fi
    fi

    if [[ -z $VMNODE ]]; then #for bare-metal nodes
	eval VLANNIC=\$VLANNIC_$index #VLANNIC could be ethx, primary, primary:ethx or empty
	
        #determine if the current is primary network
	PMRY=0   
	if [[ -z $VLANNIC ]] || [[ $VLANNIC = primary* ]]; then
	    PMRY=1
	fi
	
	if [[ $VLANNIC = primary* ]]; then
	    VLANNIC=${VLANNIC#primary}
	fi
	if [[ -n $VLANNIC ]]; then
	    nic=${VLANNIC#:}
	fi
    else #for KVM nodes
	eval VLAN_VMNICPOS=\$VLAN_VMNICPOS_$index #VLAN_VMNICPOS identifies the position of the mac address in mac, the mac has the following format: 01:02:03:04:05:0E!node5|01:02:03:05:0F!node6-eth

	PMRY=0
	if [[ $index -eq 1 ]]; then 
	    PMRY=1   ##the first one is always primary network
	fi

	if [[ -z $VLAN_VMNICPOS ]]; then
	    nic="eth1"
	fi
    fi
    
	
    
    if [[ -z $nic ]]; then  #get the nic
	if [[ -n $MACADDRESS ]]; then 
	    pos=0
            #mac has the following format: 01:02:03:04:05:0E!node5|01:02:03:05:0F!node6-eth1
	    for x in `echo "$MACADDRESS" | tr "|" "\n"`
	    do
		node=""
                mac=""
		pos=$((pos+1))
		i=`expr index $x !`
		if [[ $i -gt 0 ]]; then
		    node=`echo ${x##*!}`
		    mac_tmp=`echo ${x%%!*}`
		else
		    mac_tmp=$x
		fi

		if [[ $pos -eq 1 ]]; then
		    mac1=$mac_tmp
		fi

		if [[ -n $VMNODE ]]; then
		    if [[ $pos -eq $VLAN_VMNICPOS ]]; then
			mac=$mac_tmp
			break
		    fi
		else
		    if [[ "$PRIMARYNIC" = "$mac_tmp" ]]; then
			mac=$mac_tmp
			break
		    fi

		    if [[ -z "$PRIMARYNIC" ]] || [[ "$PRIMARYNIC" = "mac" ]]; then
			if [[ -z "$node" ]] || [[ "$node" = "$NODE" ]]; then
			   mac=$mac_tmp
			   break
			fi
		    fi
		fi
	    done

	    if [[ -z $mac ]]; then
		if  [[ -n $VMNODE ]]; then
		     mac=$mac1 
		else 
		    if [[ -z "$PRIMARYNIC" ]] || [[ "$PRIMARYNIC" = "mac" ]]; then 
			mac=$mac1 #if nothing mathes, take the first mac
		    else
			nic=$PRIMARYNIC #or the primary nic itself is the nic
		    fi
		fi
	    fi
	else
	    logger -t xcat "deconfigvlan: no mac addresses are defined in the mac table for the node $NODE"
	    echo "deconfigvlan: no mac addresses are defined in the mac table for the node $NODE"
	    index=$((index+1))
	    continue
	fi
	echo "mac=$mac"
    fi

    if [[ -z $nic ]];  then
	#go to each nic to match the mac address	
	ret=`ifconfig |grep -i $mac | cut -d' ' -f 1 2>&1`;
	if [ $? -eq 0 ]; then
	    for x in $ret
	    do  
                #ignore bridge because bridge and the nic has the same mac address
		if [[ $isSLES -eq 1 ]]; then
		    ret1=`grep -i "TYPE='Bridge'" $nwdir/ifcfg-$x 2>&1`;
		else
		    ret1=`grep -i "TYPE=Bridge" $nwdir/ifcfg-$x 2>&1`;
		fi
		if [ $? -ne 0 ]; then
		    nic=$x
		    break
		fi
	    done
	    if [ -z $nic ]; then
		nic=`echo $ret |head -n1`
	    fi
	else
	    logger -t xcat "deconfigvlan: The mac address for the network for $NODE is not defined."
	    echo "deconfigvlan: The mac address for the network for $NODE is not defined." 
	    index=$((index+1))
            continue
	fi
    fi
    echo "nic=$nic"

    eval VLANID=\$VLANID_$index
    eval VLANIP=\$VLANIP_$index
    eval VLANNETMASK=\$VLANNETMASK_$index    

    #write into the network configuration file
    if [ -z "$VMNODE" ]; then
	newnic="$nic.$VLANID"
    else
	newnic="$nic"
    fi

    #stop the vlan network
    logger -t xcat "dconfigvlan: de-configuring vlan $newnic for $NODE..."
    echo "dconfigvlan: de-configuring vlan $newnic for $NODE..."

    if [[ -n $newnic ]]; then
	ret=`ifdown $newnic 2>&1`
	if [ $? -ne 0 ]; then
	    logger -t xcat "deconfigvlan: stopping $newnic: $ret"
	    echo "deconfigvlan: stopping $newnic: $ret"
	fi

        #remove the network conf file for the vlan
	ret=`rm $nwdir/ifcfg-$newnic 2>&1`
    else 
	logger -t xcat "deconfigvlan: cannot find the nic that has the vlan."
	echo "deconfigvlan: cannot find the nic that has the vlan" 
    fi

    #stop the bridge on the vm hosts, 
    if [ -f $nwdir/ifcfg-vl$VLANID ]; then
	ret=`ifconfig vl$VLANID down 2>&1`
	ret=`rm $nwdir/ifcfg-vl$VLANID 2>&1`
	ret=`brctl delbr vl$VLANID  2>&1`
    fi

    if [[ $PMRY -eq 1 ]]; then   
	logger -t xcat "dconfigvlan: changing the hostname back to $NODE..."
	echo "dconfigvlan: changing the hostname back to $NODE..."
        #change the hostname
	hostname $NODE
	
        #change the hostname permanently
	if [ -f /etc/SuSE-release ]
	then
            #SLES x
	    echo $NODE > /etc/HOSTNAME
	else
            #RedHat and others
	    fn="/etc/sysconfig/network"
	    grep HOSTNAME $fn
	    if [ $? -eq 0 ]; then
		sed -i "s/HOSTNAME.*/HOSTNAME=$NODE/" $fn
	    else
		echo "HOSTNAME=$NODE" >> $fn
	    fi
	fi
    fi
    logger -t xcat "deconfigvlan: done."
    echo "deconfigvlan: done."

    #next
    index=$((index+1))
done

exit 0