tbohne / br_2_udp Goto Github PK

Need to create TCP version. Create clean UDP version before!

Implement the printing of error messages specified in the header, not custom ones

Handle creation, transmission and checking of sha-value according to task description

The length of the buffer sent (by the server) should be nlength + 7 (where nlength is the length of the name) byte. However it does require 8 bytes, or else the file length will be cut after 3 instead of 4 bytes. This is not caused by a terminal character in the name string as cutting the name by one byte actually omits the last character of it.

Exit the application if in illegal state (receiving files without header etc)

The +128 and -128 should not be needed in these cases as it is just bytecode and will be re-read on the other side as the right type again. Could even cause nasty problems.

This could become a problem on systems where data types (int, long, ...) are actually longer than the standard requires. This can be fixed with sizeof(...), however, if sending the data to the next system this can become a problem anyway as it interprets the data differently while reading.

Looks like creating directory needs sudo rights. Also it looks like sometimes a random error occurs and the existing directory is not recognised.

The receiver should wait until the first package arrived before the countdown for a timeout starts.

Doxygen and in-file comments

Transmit the file, handle on receiver side

"Wählen Sie die Paketgröße so, dass die maximale MTU einer PPPoE-Verbindung nicht überschritten wird"

Up to now wrong variable types are used in the first data package. Description provided on page 3, task page, "Protokollspezifikation"

Wait 10 seconds for timeout after sending