#!/bin/bash # Start VPP systemctl start vpp sleep 1 # Compute the network CIDR from the Netmask mask2cidr() { nbits=0 IFS=. for dec in $1 ; do case $dec in 255) let nbits+=8;; 254) let nbits+=7;; 252) let nbits+=6;; 248) let nbits+=5;; 240) let nbits+=4;; 224) let nbits+=3;; 192) let nbits+=2;; 128) let nbits+=1;; 0);; *) echo "Error: $dec is not recognized"; exit 1 esac done echo "$nbits" } IPADDR1_MASK=$(ifconfig eth1 | grep "Mask" | awk '{print $4}' | awk -F ":" '{print $2}') IPADDR1_CIDR=$(mask2cidr $IPADDR1_MASK) # Configure VPP for vPacketGenerator IPADDR1=$(ifconfig eth1 | grep "inet addr" | tr -s ' ' | cut -d' ' -f3 | cut -d':' -f2) HWADDR1=$(ifconfig eth1 | grep HWaddr | tr -s ' ' | cut -d' ' -f5) FAKE_HWADDR1=$(echo -n 00; dd bs=1 count=5 if=/dev/urandom 2>/dev/null | hexdump -v -e '/1 ":%02X"') VLB_IPADDR=$(cat /opt/config/vlb_ipaddr.txt) VLB_MAC=$(cat /opt/config/vlb_mac.txt) GW=$(route -n | grep "^0.0.0.0" | awk '{print $2}') ifconfig eth1 down ifconfig eth1 hw ether $FAKE_HWADDR1 ip addr flush dev eth1 ifconfig eth1 up vppctl tap connect tap111 hwaddr $HWADDR1 vppctl set int ip address tap-0 $IPADDR1"/"$IPADDR1_CIDR vppctl set int state tap-0 up brctl addbr br0 brctl addif br0 tap111 brctl addif br0 eth1 ifconfig br0 up vppctl ip route add 0.0.0.0/0 via $GW sleep 1 # Set br0 with public IP and valid MAC so that Linux will have public network access ifconfig br0 hw ether $HWADDR1 ifconfig br0 $IPADDR1 netmask $IPADDR1_MASK route add default gw $GW sleep 1 vppctl set ip arp tap-0 $VLB_IPADDR $VLB_MAC # Install packet streams sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$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" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns5 sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns6 sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns7 sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns8 sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns9 sed -i -e "0,/UDP/ s/UDP:.*/UDP: "$IPADDR1" -> "$VLB_IPADDR"/" /opt/dns_streams/stream_dns10 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 sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns6 sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns7 sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns8 sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns9 sed -i -e "s/.*-> 53.*/ UDP: $RANDOM -> 53/" /opt/dns_streams/stream_dns10 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 vppctl exec /opt/dns_streams/stream_dns6 vppctl exec /opt/dns_streams/stream_dns7 vppctl exec /opt/dns_streams/stream_dns8 vppctl exec /opt/dns_streams/stream_dns9 vppctl exec /opt/dns_streams/stream_dns10 vppctl set int ip address pg0 $(cat /opt/config/pg_int.txt)"/"$IPADDR1_CIDR sleep 1 # Enable traffic flows cd /opt chmod +x run_streams_dns.sh ./run_streams_dns.sh &>/dev/null &disown