Let's discuss about bpfilter, a userspace daemon that empowers services to create efficient packet-filtering BPF programs using a high-level representation of filtering rules.

For a significant period, bpfilter wasn't more than an empty usermode helper and an abandoned patch series. However, it has recently undergone active development as a userspace daemon, which can be found on GitHub at https://github.com/facebook/bpfilter. This daemon now offers userspace services a swift and user-friendly interface to generate packet-filtering BPF programs dynamically. This discussion aims to provide further insights into bpfilter, including its current capabilities, performance, and ongoing development efforts. about this event: https://cfp.all-systems-go.io/all-systems-go-2023/talk/BKLNWP/