libwebsockets/minimal-examples/raw/README.md

name	demonstrates
minimal-raw-adopt-tcp	Shows how to have lws adopt an existing tcp socket something else had connected
minimal-raw-adopt-udp	Shows how to create a udp socket and read and write on it
minimal-raw-file	Shows how to adopt a file descriptor (device node, fifo, file, etc) into the lws event loop and handle events
minimal-raw-vhost	Shows how to set up a vhost that listens and accepts RAW socket connections