server side:
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#define SIZE 4
main()
{
int std, lfd, len, i, j, status, sport;
char str[20], frame[20], temp[20], ack[20];
struct sockaddr_in saddr, caddr;
printf("Enter the port address");
scanf("%d", &sport);
std = socket(AF_INET, SOCK_STREAM, 0);
if(std<0)
perror("Error");
bzero(&saddr, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
saddr.sin_port = htons(sport);
lfd = bind(std, (struct sockaddr *)&saddr, sizeof(saddr));
if(lfd)
perror("Bind Error");
listen(std, 5);
len = sizeof(&caddr);
lfd = accept(std, (struct sockaddr *)&caddr, &len);
printf("Enter the text:");
scanf("%s", str);i = 0;
while(i<strlen(str))
{
memset(frame, 0, 20);
strncpy(frame, str+i, SIZE);
printf("\nTransmitting frames:");
len = strlen(frame);
for(j=0; j<len; j++)
{
printf("%d", i+j);
sprintf(temp, "%d", i+j);
strcat(frame, temp);
}
write(lfd, frame, sizeof(frame));
read(lfd, ack, 20);
sscanf(ack, "%d", &status);
if(status 0)write(std, "-1", sizeof("-1"));
else{printf("Enter the sequence no of the frame where error has occured");
scanf("%s", err);
write(std, err, sizeof(err));
read(std, str, 20);
printf("Received the transmitted frame: %s\n", str);
}
}
close(std);
}
WAP to implement Sliding Window protocol?
public class GoBackN
extends datalink.Protocol
{
int nextBufferToSend; // buffer to be sent when channel is idle
int firstFreeBufferIndex; // buffer in which to store next packet
int nextSequenceNumberExpected; // sequence number expected
int firstUnAcknowledged; // last unacknowledged frame
final int maximumSequenceNumber;
int numberOfPacketsStored;
final int windowSize;
datalink.Packet[] buffer;
double timer;
public GoBackN(int windowSize, double timer)
{
super( windowSize, timer);
numberOfPacketsStored = 0;
nextBufferToSend = 0;
firstFreeBufferIndex= 0;
nextSequenceNumberExpected = 0;
firstUnAcknowledged = 0;
maximumSequenceNumber = windowSize;
this.windowSize = windowSize;
this.timer = timer;
buffer = new datalink.Packet[windowSize+1];
}
public void FrameArrival( Object frame)
{
DataFrame f = (DataFrame) frame;
// a frame has arrived from the physical layer
// check that it is the one that is expected
if (f.sequenceNumber == nextSequenceNumberExpected)
{
sendPacket(f.info); // valid frame, so send it
// to the network layer
nextSequenceNumberExpected = inc( nextSequenceNumberExpected);
}
// if frame n is ACKed then that implies n-1, n-2 etc
// have also been
// ACKed, so stop associated timers.
while ( between( firstUnAcknowledged,
f.acknowledgment,
nextBufferToSend) )
{
numberOfPacketsStored--;
stopTimer(firstUnAcknowledged);
firstUnAcknowledged = inc( firstUnAcknowledged);
}
if ( numberOfPacketsStored < windowSize )
enableNetworkLayer();
}
public void PacketArrival( datalink.Packet p)
{
buffer[firstFreeBufferIndex] = p;
numberOfPacketsStored++; // buffer packet
if ( numberOfPacketsStored >= windowSize )
disableNetworkLayer();
if ( isChannelIdle() )
{
transmit_frame( nextBufferToSend);
nextBufferToSend = inc( nextBufferToSend);
}
firstFreeBufferIndex = inc( firstFreeBufferIndex);
}
public void TimeOut( int code)
{
int seq = inc(code);
while ( seq != nextBufferToSend )
{ // cancel outstanding timers
stopTimer(seq);
seq = inc( seq);
}
nextBufferToSend = firstUnAcknowledged;
if ( isChannelIdle() )
{
transmit_frame( nextBufferToSend);
nextBufferToSend = inc( nextBufferToSend);
}
}
public void CheckSumError()
{
}
public void ChannelIdle()
{
if ( nextBufferToSend != firstFreeBufferIndex )
{
transmit_frame( nextBufferToSend);
nextBufferToSend = inc( nextBufferToSend);
}
}
private boolean between( int a, int b, int c)
{ // calculate if a<=b<c circularly
if(((a<=b) && (b<c))
((c<a) && (a<=b))
((b<c) && (c<a)))
return true;
else
return false;
}
private int inc ( int a)
{ // increment modulo maximum_sequence_number + 1
a++;
a %= maximumSequenceNumber+1;
return a;
}
private void transmit_frame( int sequenceNumber)
{
int acknowledgement;
// piggyback acknowledge of last frame receieved
acknowledgement = (nextSequenceNumberExpected+maximumSequenceNumber)
% (maximumSequenceNumber+1);
// send it to physical layer
sendFrame( new DataFrame( sequenceNumber,
acknowledgement,
buffer[sequenceNumber]));
startTimer( sequenceNumber, timer);
}
}
class DataFrame
{ /* frame structure */
int sequenceNumber;
int acknowledgment;
datalink.Packet info;
DataFrame ( int s, int a, datalink.Packet p)
{
info = p;
sequenceNumber = s;
acknowledgment = a;
}
}
yes
The main task of the Transmission Control Protocol is simple: packaging and sending data. Of course, almost every protocol packages and sends data. What distinguishes TCP from these protocols is the sliding window mechanism that controls the flow of data between devices. This system not only manages the basic data transfer process, it is also used to ensure that data is sent reliably, and also to manage the flow of data between devices to ensure that data is transferred efficiently without either device sending data faster than the other can receive it.
1. It applies to sliding door and window, wardrobe. 2. It used to prevent dust,water,cold air from entering 3. It has strong water-resistance function. 4. various dimensions according to enquiries.
If you are referring to turning it on it's side, then no. The condensate that occurs typically collects in a pan that helps cool the internal working of many modern ac units.
It is not a PHP code but a Javascript code. w3schools.com has all the answers you need about Javascript. It will teach you how to use the code and implement it into your website. If you're creating your own websites I suggest you actually learn the code. It will come in handy later on.
Efficiency bandwith onebit sliding window protocol goback N selective repeat
No, there is no possibility to do that.
YES
yes
i need program C for sliding window protocl
How to prepare for JEE Main 2015 Exam
replace the window regulator.
I just shattered the rear sliding window of my Ford F250 and was told by Dave of Quality Glass in LaPorte IN that the current generation of rear sliding windows are designed so the glass cannot be removed to be replaced, so the answer given me was, I need to purchase a new sliding window assembly. I checked into replacing the sliding window with just straight glass and it actually cost me more than aftermarket sliding windows. This is not the definitive answer, but the working answer in my situation.
Sliding windows have only one set of parameters to use (window edges in the case of sliding windows), this makes them simpler. Also the problem when transport protocol data units are received in the wrong order causing windows to be increased and then decreased does not happen. On the other hand the credit scheme is more versatile and flexible and allows for the dynamic management of buffering separated from the acknowledgements
Yes, you can install window film on sliding glass doors because the sliding doors are still individual and not connected whereas it can disturb the film and come away.
As compared to stop-and-wait flow control the sliding window flow control has a far better performance. This is because in a wireless environment data rates are very low and noise level is very high, so waiting for an acknowledge for every packet that is transfered does not seem feasible. Thus,Transferring data as a bulk ( Once the medium is allocated ) would yield a better performance in terms of higher throughput. So the choice is sliding window flow control. Sliding window flow control is a point to point protocol assuming that no other entity tries to communicate until the current data transfer is complete by truqchalar
As compared to stop-and-wait flow control the sliding window flow control has a far better performance. This is because in a wireless environment data rates are very low and noise level is very high, so waiting for an acknowledge for every packet that is transfered does not seem feasible. Thus,Transferring data as a bulk ( Once the medium is allocated ) would yield a better performance in terms of higher throughput. So the choice is sliding window flow control. Sliding window flow control is a point to point protocol assuming that no other entity tries to communicate until the current data transfer is complete by truqchalar