getpeername - get name of connected TCP/IP peer

       Only works on IP sockets.

                                                  1997 April 13                                   GETPEERNAME(1)

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.

       getpeername - get name of connected TCP/IP peer

-n     Don't translate IP addresses and port numbers to names.

       -pprotocol
              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.

getpeername(3).

getpeername [-n] [-pprotocol]