erpel_v6_cleanup

erpel_v6_cleanup.sh

#!/bin/sh
#   inet6 ... prefixlen 64 deprecated autoconf pltime 0 vltime 1984906 
#   inet6 ... prefixlen 64 autoconf pltime 174916 vltime 2162116 

# special code to allow hup

COMMAND=ifconfig
LOGFILE=/var/log/erpel_cleanup.log
WAIT_SECONDS=0
while getopts i:dnw arg
do
	case ${arg} in
		i)
			IFACE=${OPTARG}
			;;
		d)
			echo "debug mode"
			set -x
			;;
		n)
			# dry run mode
			COMMAND="echo ifconfig"
			;;
		w)
			WAIT_SECONDS=10
			;;
		?)
			exerr "invalid argument"
	esac
done

rpl_logpart() {
	echo -n "$1" >> $LOGFILE
}
rpl_log() {
	echo "$1" >> $LOGFILE
}

drop_addrs() {
	while read -r addr; do
		[ -z $addr ] && echo "z" && continue
		rpl_logpart "Dropping address $addr: "
		if $COMMAND $IFACE inet6 $addr -alias; then
			rpl_log " Success"
		else
			rpl_log " Failed"
		fi
	done << EOS
${1}
EOS
}

print_count() {
	echo $2
	echo "$1" | wc -l
}

if [ "x" = "x${IFACE}" ]; then
	echo "Required option -i not set" >&2 && exit 1
fi

rpl_log "Invoked at $(date)."
sleep ${WAIT_SECONDS}
rpl_log "Running cleanup on interface ${IFACE} at $(date)."
RAW=$(ifconfig -L "${IFACE}")
INET6=$(echo "$RAW" | grep -E ' *inet6')
AUTOCONF=$(echo "$INET6" | grep autoconf)
NONDEP=$(echo "$AUTOCONF" | grep -v deprecated)


DEP_ADDRS=$(echo "$RAW" | grep -E 'inet6.*deprecated' | awk '{print $2}')

drop_addrs "$DEP_ADDRS"



NONDEP_ADDRS=$(echo "$NONDEP" | grep -vE 'inet6.*deprecated' | grep -E 'inet6.*pltime' | awk '{print  $2}')
# keep current line
NONDEP_ADDRS_OLD=$(echo "$NONDEP_ADDRS" | sed '$d')

drop_addrs "$NONDEP_ADDRS_OLD"

rpl_log $(ifconfig -L "${IFACE}" | grep -E ' *inet6')