Typical usage:
make FILE=client make FILE=server
Will generate CA certificate and signed client and server certificates.
More "low-level" usage:
make generate-ca-certificate make generate-private-key FILE=client make sign FILE=client
First generate client and server certificates. Then start a server with it's cert and make ca.crt a trusted certification authority.
After that you can:
./connect.sh client localhost:8600 < file_with_a_data_to_be_sent.dat