Bravo!! I've taken your first piece of code and it's now working like a charm. Great job @hdb. In fact, the dumpfile I got (using tcpdump) from server's interface showed that only 482 bytes were sent and that misled me into thinking that the client worked properly and it was the server to be blame.

Line 0220: (|last 5 bytes I got|28 af 00 01 0a) 26 0f 0b

To make it clear, starting from 0x26, the packet is lost, so you believe that my client considers maybe this byte is the end of line? By the way, what represents the '\n' in packet transmission?