80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
#include <iostream>
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#include <vector>
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#include <queue>
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using namespace std;
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class SlidingWindow {
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private:
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int window_size;
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int total_frames;
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vector<int> sent_frames; // queue of sent frames
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int next_frame_to_send; // index of the next frame to send
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int next_frame_to_receive; // index of the next frame to receive
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public:
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SlidingWindow(int window_size, int total_frames) {
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this->window_size = window_size;
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this->total_frames = total_frames;
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this->next_frame_to_send = 0;
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this->next_frame_to_receive = 0;
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}
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// send a frame
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void send_frame() {
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if (sent_frames.size() < window_size && next_frame_to_send < total_frames) {
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sent_frames.push_back(next_frame_to_send);
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next_frame_to_send++;
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cout << "Sent frame " << sent_frames.back() << endl;
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} else {
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cout << "Window is full. Waiting before sending next frames." << endl;
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}
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}
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// receive a frame
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void receive_frame(int frame_number) {
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if (frame_number == next_frame_to_receive) {
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next_frame_to_receive++;
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cout << "Received frame " << frame_number << endl;
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} else {
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cout << "Received frame " << frame_number << ", but expected frame " << next_frame_to_receive << endl;
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}
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// remove acknowledged frames from the sent_frames queue
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while (!sent_frames.empty() && sent_frames.front() <= next_frame_to_receive - 1) {
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sent_frames.erase(sent_frames.begin());
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}
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}
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bool all_frames_sent() {
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return next_frame_to_send == total_frames;
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}
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bool all_frames_received() {
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return next_frame_to_receive == total_frames;
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}
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};
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int main() {
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int window_size, total_frames;
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cout << "Enter the window size:\t";
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cin >> window_size;
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cout << "Enter the total number of frames:\t";
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cin >> total_frames;
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SlidingWindow window(window_size, total_frames);
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while (!window.all_frames_sent() || !window.all_frames_received()) {
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window.send_frame();
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// simulate receiving frames
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for (int i = 0; i < rand() % 3; i++) {
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int frame_number = rand() % total_frames;
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window.receive_frame(frame_number);
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}
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}
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cout << "All frames sent and received successfully!" << endl;
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return 0;
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}
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