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recvfrom() operates in the same manner as recv() except that it is abl
+e to return the address of the socket from which the message was sent
+.  For connected datagram sockets, recvfrom() simply returns the same
+ address as getpeername() (see getpeername(2)).  For stream sockets, 
+recvfrom() retrieves data in the same manner as recv(), but does not 
+return the socket address of the sender.

Returns the address of the sender if SOCKET's protocol supports this; 
+returns an empty string otherwise.