toytcp

toy tcp implementation

setup

$ cd toytcp
$ chmod +x setup.sh
$ ./setup.sh

The following virtual network environment will be created. Only Linux is supported for now.

In order to avoid conflicts with the kernel's protocol stack, all packets with the RST flag are set to be discarded by iptables.

build & run

$ cargo build --examples

echo-server & client

server

$ sudo ip netns exec host1 ./target/debug/examples/echoserver 10.0.0.1 30000

client

$ sudo ip netns exec host2 sudo ./target/debug/examples/echoclient 10.0.0.1 30000

file upload

server

$ sudo ip netns exec host2 ./target/debug/examples/fileserver 10.0.1.1 40000 <save file name>

client

$ sudo ip netns exec host1 ./target/debug/examples/fileclient 10.0.1.1 40000 sample.jpg

simulate packet loss

Discard 0.1% of packets

$ sudo ip netns exec router tc qdisc add dev router-veth2 root netem loss 0.1%

Remember to turn off the settings when you're done experimenting.

sudo ip netns exec host2 tc qdisc del dev host2-veth1 root