CPSC 317 Internet Computing: Module 4 (Socket programming with TCP)

bind()

- assigns a port number and IP address to a socket object

listen()

- called by TCP server to convert an unconnected socket (i.e., an active port) into a passive socket (i.e., waiting for incoming connection)

accept()

- called by TCP server to return the next completed connection from the completed connection queue - returns a new socket descriptor

connect()

- called by the client to create a connection with the server - returns when the connection is established or when an error occurs

socket()

- creates a new socket by assigning a new file descriptor - returns the file descriptor, which acts as an index in a file descriptor table and contains pointers to socket information - assigns the protocol to the created socket descriptor

read()

- used in TCP - reads data

write()

- used in TCP - sends data

recvfrom()

- used in UDP - reads data

sendto()

- used in UDP - sends data