188 sudo usermod -aG wireshark <user>
191 sudo tshark -i lo -f "udp" -w file.pcap
192 sudo su
194 rm /tmp/file.pcap
195 sudo rm /tmp/file.pcap
196 sudo tshark -i lo -f "udp" -w /tmp/file.pcap
197 sudo mv /tmp/file.pcap ./
198 ls
199 chown whoami file.pcap
200 chown -R whoami file.pcap
201 chown -R grandpaw file.pcap
202 sudo chown -R grandpaw file.pcap
203 sudo wireshark
204 sudo tshark -i lo -f "udp" -w /tmp/file_2.pcap
script.sh:
#!/bin/bash
sudo tc qdisc add dev lo root handle 1: htb
sudo tc class add dev lo parent 1:0 classid 1:2 htb rate 2mbit
sudo tc filter add dev lo protocol ip parent 1:0 prio 1 u32 match ip dport 5201 0xffff flowid 1:2
sudo tc qdisc add dev lo parent 1:2 handle 20: netem limit 10000 delay 10ms
remove-impair.sh
#!/bin/bash
sudo tc qdisc del dev lo root handle 1:
Start server
iperf3 -s -B 127.0.0.1
Run client
iperf3 -u -c 127.0.0.1 -b 2m -t 30 -l 1000
Filter packets
tshark -r /tmp/file_2.pcap -Y "udp.dstport == 5201" -T fields -e frame.time_epoch |
awk 'NR>1 {print ($1-prev)*1000 " ms"} {prev=$1}' > stamps.txt
impair.sh
#!/bin/bash
sleep 5
for i in {0..10}; do
sudo tc class change dev lo parent 1:0 classid 1:2 htb rate 500.0kbit
sleep 0.5
sudo tc class change dev lo parent 1:0 classid 1:2 htb rate 2000.0kbit
sleep 1
done
echo "Finished"