private void transfer(InputStream input, OutputStream output) throws IOException {
			// The thread would be blocked if there is no outgoing packets from input stream.
			transfer(buffer, input.read(buffer), output);
		}
A work thread running NetBare core logic. NetBase established the VPN connection is this thread
and read packets from the VPN file descriptor and transfer them to local proxy servers. Every
IP protocol runs an independent local proxy server to receive the packets.

@author Megatron King
@since 2018-10-08 19:38
netbare-core/src/main/java/com/github/megatronking/netbare/NetBareThread.java