Network Kernel API with the Control Socket for Extending Transport Protocols

https://doi.org/10.1145/3630202.3630229

Dependencies

make
clang
gcc-multilib
libbpf-dev

For viewing BPF maps

linux-tools-generic
bpftool

Environment

Ubuntu 23.04 (Linux 6.2.0-32-generic x86_64)
Ubuntu 22.04.3 LTS (Linux 5.15.0-83-generic x86_64)

Building

make -C agent
make -C bpf
make -C cmd

Problems

Incorrectly calculated checksum for UDP packets with UDP options

Disable offloading

sudo ethtool --offload IFNAME rx off tx off