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#!/bin/sh . `dirname $0`/nssocket_env.sh echo "---- TCP echo" pre_sync echo | nc -q 0 $VETH_CHILD_ADDR $DSTPORT post_sync echo "---- UDP echo" pre_sync echo | nc -q 0 -u $VETH_CHILD_ADDR $DSTPORT post_sync echo "---- ICMP echo" pre_sync ping -c 1 $VETH_CHILD_ADDR > /dev/null 2>&1 post_sync fin