Looks like there's a post for Doosan and a driver for online control via Windows, but not Linux. The Doosan "API Manual" doc says there are both Linux and Windows versions of its API library, so perhaps it's not too hard to get your Windows driver compiling for Linux?
BTW, I did manage to compile a trivial C++ program against their library in Linux. Another option might be Doosan's python-like DRL language which runs on the robot and appears to include socket code. So that makes me wonder if a RoboDK driver might be possible by talking to a custom DRL program instead of their low-level API. That'd probably be less realtime, but more portable since their C++ API only supports X86 CPUs.