getpeername prints the IP address and service name (port number) of the
remote peer connected to standard input.
The IP address and the service name are printed on the same line,
separated by one space.
OPTIONS
-n
Don't translate IP addresses and port numbers to names.
-p protocol
Force getpeername to use protocol as the protocol when
translating port numbers to service names.
Protocol can be tcp and udp.
Normally, getpeername automatically determines what type of
socket it is connected to.
