Simple netcat wrote in C. Supports ip4, ip6, hostnames. Client and server mode. Both tpc and udp are available.
git clone https://github.com/guzlewski/netcat
cd netcat
make./netcat.out [OPTIONS] [ADDRESS] [PORT]
-u - use udp instead of tcp
-l - server mode, ADDRESS can be blank, default ip will be used
-4 - force ip4
-6 - force ip6
ADDRESS - ip4, ip6 or hostname (will be resolved via DNS) to connect or bind in server mode
PORT - number of port to connect or listen