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9ee44a1a76
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fc0dba3552
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#include <iostream>
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#include <cmath>
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#include <vector>
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using namespace std;
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// Function to calculate the number of parity bits needed
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int calculateParityBits(int dataBits) {
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int parityBits = 0;
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while (pow(2, parityBits) < dataBits + parityBits + 1) {
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parityBits++;
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}
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return parityBits;
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}
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// Function to encode the data using Hamming code
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vector<int> encodeData(vector<int> data) {
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int dataBits = data.size();
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int parityBits = calculateParityBits(dataBits);
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vector<int> encoded(dataBits + parityBits, 0);
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// Set the data bits
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int j = 0;
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for (int i = 0; i < encoded.size(); i++) {
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if (i + 1 == pow(2, j)) {
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j++;
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} else {
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encoded[i] = data[i - j];
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}
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}
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// Calculate and set the parity bits
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for (int i = 0; i < parityBits; i++) {
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int parityBit = pow(2, i);
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int sum = 0;
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for (int j = parityBit - 1; j < encoded.size(); j += 2 * parityBit) {
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for (int k = 0; k < parityBit; k++) {
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if (j + k < encoded.size()) {
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sum += encoded[j + k];
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}
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}
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}
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encoded[parityBit - 1] = sum % 2;
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}
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return encoded;
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}
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// Function to check for errors in the encoded data
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int checkForErrors(vector<int> encoded) {
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int parityBits = calculateParityBits(encoded.size() - calculateParityBits(encoded.size()));
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int errorPosition = 0;
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for (int i = 0; i < parityBits; i++) {
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int parityBit = pow(2, i);
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int sum = 0;
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for (int j = parityBit - 1; j < encoded.size(); j += 2 * parityBit) {
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for (int k = 0; k < parityBit; k++) {
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if (j + k < encoded.size()) {
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sum += encoded[j + k];
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}
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}
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}
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errorPosition += (sum % 2) * parityBit;
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}
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return errorPosition;
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}
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int main() {
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int dataBits;
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cout<<"Enter the number of data bits:\t";
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cin >> dataBits;
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vector<int> data(dataBits);
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cout<<endl<<"NOTE: Make sure the bits are entered in binary format, separated by spaces.\nEg. 1 0 0 1 (for 4 data bits).";
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cout<<endl<<"Enter the data bits:\t";
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for (int i = 0; i < dataBits; i++) {
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cin >> data[i];
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}
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vector<int> encoded = encodeData(data);
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cout<<endl<<"--------------------"<<endl;
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cout<<"Encoded bits are:\t";
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for (int bit : encoded) {
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cout << bit << " ";
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}
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cout<<endl<<"--------------------"<<endl;
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cout<<endl<<"Enter the encoded bits:\t";
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vector<int> receivedEncoded(encoded.size());
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for (int i = 0; i < encoded.size(); i++) {
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cin >> receivedEncoded[i];
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}
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int errorPosition = checkForErrors(receivedEncoded);
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if (errorPosition == 0) {
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cout<<"No errors detected."<<endl;
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} else {
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cout<<"Error detected at position: "<<errorPosition<<endl;
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}
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return 0;
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}
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@ -1,34 +0,0 @@
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import paramiko
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def install_dhcp_server(remote_host, username, password):
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# Create an SSH client
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ssh = paramiko.SSHClient()
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ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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try:
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# Connect to the remote machine
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ssh.connect(remote_host, username=username, password=password)
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# Update package list
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stdin, stdout, stderr = ssh.exec_command('sudo apt update')
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stdout.channel.recv_exit_status() # Wait for the command to complete
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# Install ISC DHCP Server
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stdin, stdout, stderr = ssh.exec_command('sudo apt install -y isc-dhcp-server')
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stdout.channel.recv_exit_status() # Wait for the command to complete
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# Optional: you can add more commands to configure the DHCP server here
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print("DHCP server installed successfully.")
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except Exception as e:
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print(f"An error occurred: {e}")
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finally:
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# Close the SSH connection
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ssh.close()
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if __name__ == "__main__":
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remote_host = "192.168.1.100" # Replace with your remote machine's IP
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username = "your_username" # Replace with your SSH username
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password = "your_password" # Replace with your SSH password
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install_dhcp_server(remote_host, username, password)
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