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#!/bin/bash
#Disable all the running streams
vppctl packet-gen disable
#Initial configuration: run only two streams
vppctl packet-gen enable-stream dns1
vppctl packet-gen enable-stream dns2
sleep 180
#Rehash port numbers and re-run five streams every minute
while true; do
vppctl packet-gen disable
vppctl pac del dns1
vppctl pac del dns2
vppctl pac del dns3
vppctl pac del dns4
vppctl pac del dns5
#Update destination (vLB) IP
VLB_IPADDR=$(cat /opt/config/vlb_ipaddr.txt)
IPADDR1=$(cat /opt/config/local_private_ipaddr.txt)
sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns1
sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns2
sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns3
sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns4
sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns5
#Update source ports (make them random)
sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns1
sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns2
sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns3
sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns4
sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns5
vppctl exec /opt/dns_streams/stream_dns1
vppctl exec /opt/dns_streams/stream_dns2
vppctl exec /opt/dns_streams/stream_dns3
vppctl exec /opt/dns_streams/stream_dns4
vppctl exec /opt/dns_streams/stream_dns5
#Resume stream execution
vppctl packet-gen enable-stream dns1
vppctl packet-gen enable-stream dns2
vppctl packet-gen enable-stream dns3
vppctl packet-gen enable-stream dns4
vppctl packet-gen enable-stream dns5
sleep 60
done
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