project for network services and client

I. Overview UDP is a transport layer protocol that provides no reliability. This project aims to show how to implement extra features for the protocol in the application layer. The project will develop a new version of UDP protocol called UDPplus which provides reliable connection oriented between a client and a UDPplus sever. The UDPplus is implemented at application layer using UDP protocol only. II. Basic Scenario The UPDplus is a simple bank inquiry application where the client sends full name and receive the account name that is associated with this name as following: Name Account No Name Account No Abdullah Ali 15324 Asma Awal 71825 Manal Abdullah 90781 Osama Ahmed 12818 Henry Markos 88125 Alice Tarkood 29502 Hisham Mansoor 62044 Mohammed Khalid 19012 Client Process: the process reads the name from a user then sends it to the server which returns the account number. The process prints the account number to the user. Server Process: the process remains ready to receive inquiries, once an inquiry is received it looks for the account associated with the name as it is showed in the table above. If the account is found the process returns the account number or returns “0000” as an error. Imam University | CCIS | Doc. No. 001-06-20170316 Page 2 of 3 III. Application Core Features The basic scenario should be extended to implement the following features: 1. Connection oriented feature: the UPDplus should implement two way handshaking. The client should send a notification to the server in order to establish a new connection. If the server is available it will replay with the maximum number of messages the server can handle. If the server is not available (i.e. busy), it will replay with -1. a. You should implement the server to randomly response with a chance 20% not available. b. The client cannot send datagrams until a positive response received from the server. c. The port number for the server side is 9152. d. The port number for the client side should be random. 2. Reliability feature: the reliability in UDPplus is achieved by a. Every message sent by the client, the server should send an acknowledgement b. Implement a timeout event in the client side, the event happens when an acknowledgment is not received within 30 millisecond, the client should resend the message. Each message has its own timeout and acknowledgement. c. Implement a 10% random timeout event i.e. 10% of client’s messages will not be acknowledged . 3. Security feature: the UDPplus should implement encryption and decryption features for each messages exchanged between the client and the server processes. Control information messages are sent plainly. a. The encryption method is to reverse the message before sending it. For example, if the client process wants to inquire about “Osama Ahmed” it sends it as “demhA amasO” b. The decryption method is to reverse the message before processing it. IV. Submission The submission date is 4/4/2019, the outcome of the project: 1. Project Report: each group is expected to submit a report about the project explaining how the code meets requirements. The report should be divided according to the features required to be implemented along with snapshot of code related to a particular feature. The report also should explain difficulties in the project. The report should conclude with testing section. The report should be submitted both soft and hard versions. 2. Source Code: each group should submitted files of source code for the client and the server processes. It is highly recommended to use high modular programming with good use of comments to explain segments of code. Each group can choose proper programming language. V. Grading # Task Grade (%) 1 Basic Scenario 15 2 Acknowledgment 15 3 Timeout event 15 4 Security feature 15 5 Report 20 6 Discussion 20