sockaddr_in

sockaddr_in (

port

, 

addr_string

)

pack_sockaddr_in 
(port, addr_string)

Takes a port number and a four-byte addr_string (as returned by inet_aton ) and returns the socket address structure including those arguments packed with the AF_INET argument. This structure is normally what you need for the arguments in bind , connect , and send , and is also returned by getpeername , getsockname , and recv .