julia ljunbjörk and anita mugenyi. what is a socket? like a house between the layers
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Socket Programming with TCP and UDP
Julia Ljunbjörk and Anita Mugenyi
What is a socket?Like a houseBetween the layers
Socket programmingClient –serverTwo ways
Socket programming1. A client reads a line from its standard input
(keyboard) and sends the line out its socket to the server
2. The server reads a line from its socket3. The server converts the line to uppercase4. The server sends the modified line out its
socket to the client5. The client reads the modified line from its
socket and prints the line on its standard output(monitor)
process
TCP withbuffers,variables
socket
host orserver
process
TCP withbuffers,variables
socket
host orserver
Internet
controlled byapp developer
Socket programming with TCPReliable, byte stream-oriented Three-way handshakeThree socketsStreams
wait for incomingconnection requestconnectionSocket =welcomeSocket.accept()
create socket,port=x, forincoming request:welcomeSocket =
ServerSocket()
create socket,connect to hostid, port=xclientSocket =
Socket()
closeconnectionSocket
read reply fromclientSocket
closeclientSocket
Server (running on hostid) Client
send request usingclientSocketread request from
connectionSocket
write reply toconnectionSocket
TCP connection setup
Socket programming with UDPNo streamsNo connectionDatagram socketIndividual packets
Server (running on hostid)
closeclientSocket
read datagram fromclientSocket
create socket,clientSocket = DatagramSocket()
Client
Create datagram with server IP andport=x; send datagram via clientSocket
create socket,port= x.serverSocket = DatagramSocket()
read datagram fromserverSocket
write reply toserverSocketspecifying client address,port number
Thank you for your time!
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