Client

• TCP client connects -> close on error, throw an exception

• TCP client reads:

  • result < 0 -> close, throw an exception
  • result == 0 -> close

• TCP client writes:

  • result <= 0 -> throw an exception

• UDP client receives:

  • result <= 0 -> throw an exception

• UDP client sends:

  • result <= 0 -> throw an exception

Server

• TCP server reads:

  • result < 0 -> close, throw an exception
  • result == 0 -> close

• TCP server writes:

  • result <= 0 -> close, throw an exception

• UDP server receives:

  • result <= 0 -> throw an exception

• UDP server sends:

  • result <= 0 -> throw an exception

File

• File reads:

  • result < 0 -> throw an exception

• File writes:

  • result < 0 -> throw an exception