Problem: read_block () cannot return 0 bytes as a valid read block, as it is interpreted as to send a return code only (message: reply code). In general, read_block would send more than 0 bytes and send the correct frame (message: reply code, return code and data).
This causes the client side to interpret the incoming message as invalid, which is not correct behavior.
Problem: read_block () cannot return 0 bytes as a valid read block, as it is interpreted as to send a return code only (message: reply code). In general, read_block would send more than 0 bytes and send the correct frame (message: reply code, return code and data).
This causes the client side to interpret the incoming message as invalid, which is not correct behavior.