Running test_file
Enable write
file-iofd: write() returned rc=16
01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 
Enable read
file-iofd: read() msg with rc=16
01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 
file-iofd: read() msg with rc=0

Running test_connected
ep1: write() returned rc=0
ep1: write() returned rc=16
ep2: read() msg with len=16
01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 
Running test_unconnected
ep1: sendto() returned rc=16
ep2: recvfrom() msg with len=16
01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10