addrc

#!/bin/bash -e

echo ${INTERFACE:?"need set INTERFACE first"}

HOSTADDR=$(ifconfig | grep -A1 "$INTERFACE" | grep 'inet addr:' |cut -d: -f2 | awk '{ print $1}')
BRDADDR=$(ifconfig | grep -A1 "$INTERFACE" | grep 'inet addr:' |cut -d: -f3 | awk '{ print $1}')
MASKADDR=$(ifconfig | grep -A1 "$INTERFACE" | grep 'inet addr:' |cut -d: -f4 | awk '{ print $1}')
GATEWAY=$(route -n | grep 'UG[ \t]' | awk '{print $2}')
HOSTNAME=$(hostname -s)

echo $HOSTADDR | tee > HOSTADDR
echo $BRDADDR
echo $MASKADDR
echo $GATEWAY
echo $HOSTNAME

# split ip

for foo in 1 2 3 4; do
    IPADDR[$foo]=`echo ${HOSTADDR}|cut -d"." -f$foo`
done

#split mask

for foo in 1 2 3 4; do
    MASK[$foo]=`echo ${MASKADDR}|cut -d"." -f$foo`
	NETADDR[$foo]=$[${IPADDR[$foo]}&${MASK[$foo]}]
done


NETWORK="${NETADDR[1]}.${NETADDR[2]}.${NETADDR[3]}.${NETADDR[4]}"
echo $NETWORK