1. C Program To Implement Stop And Wait Protocol For Flow Control
2. Sliding Window Protocol

Implement the simplex protocol for a noisy channel (Fig. 3-12 from Tannenbaum).General rules: source code must be commented and a description how to run the programs must be attached. The goal is to implement a data transmission programs that involve two layers: Physical layer and Data link layer. We will simulate the physical layer by the transport layer using the programs described in the lecture 'Unix Network Programming'. For the programs on the data link layer follow the Fig. You will need to modify the meaning of functions in Fig.

3-12 so that they relate to the regular Unix Network Programming functions. Sender sends data every Pt = 500ms and always has data to send. Sender timeout is Rt = 1 sec. Send packets over UDP. Sender follows the usual logic. We need to simulate losses since our network will almost never lose packet.

At the receiver, write additional code in two places 1. As soon as the receives gets a packet (before any update to variables): Ignore the packet with probability P = 0.2. This simulates a lost data packet. Just before the receiver sends an ack (after updating variables): Don't send the ack with probability P = 0.2. This simulates a lost ack.How to drop/ignore packet with probability P?. Generate a random float point number p, between 0 and 1.

C Program To Implement Stop And Wait Protocol For Flow Control

If p: For example, the sender log might look like the following: 19:43: Sentpacket seqnum=0 19:12: Receivedack seqnum=0 19:43: Sentpacket seqnum=1 19:43 Receivedack seqnum=1 19:43: Sentpacket seqnum=0 19:35: Timeout seqnum=0 19:55: Sentpacket seqnum=0 Retransmit 19:55: Receivedack seqnum=0 This shows what the sends log would like with a data packet is lost and timer expires. Play around with with varying Pt, Rt and P values and see if the results are as expected. It is best to accept these values as command line parameters so that it is easy to experiment. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) READ THE INSTRUCTIONS TO SEE WHAT NEEDS TO BE DONE, HOW THE OUTPUT IS TO BE SHOWED I HAVE TWO SAMPLE CODES WITH ME FOR THE SAME ASSIGNMENT. IF U R READY TO DO THIS ASSIGNMENT, I CAN PROVIDE U WITH THAT TO HELP U MORE UNDERSTAND WHAT IS NEEDED.

Sliding Window Protocol

## Platform UNIX C OR C IS OK. Skills:, See more:,.