I have download and install foo2zjs.tgz package without problems, then make cups, cups find this printer on network, everything looks fine:
C301_10.0.0.3 "Printer is now on-line."
Location: Local Printer
Printer Driver: Generic ZjStream Printer Foomatic/foo2zjs (recommended)
Printer State: idle, accepting jobs, published.
Device URI: socket://10.0.0
Forum: Oki C301dn, C310dn