initial commit

.gitignore

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+
+# Created by https://www.toptal.com/developers/gitignore/api/java
+# Edit at https://www.toptal.com/developers/gitignore?templates=java
+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# End of https://www.toptal.com/developers/gitignore/api/java
+
+/.metadata/

README.md

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+# nst-0x04
+
+this repo holds *sawce* for project `0x04` (evil telnet virus) of the NST lessons

RemoteSystemsTempFiles/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>RemoteSystemsTempFiles</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.rse.ui.remoteSystemsTempNature</nature>
+	</natures>
+</projectDescription>

nst-0x04/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

nst-0x04/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>nst-0x04</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

nst-0x04/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=11

nst-0x04/src/nst_0x04/Main.java

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+package nst_0x04;
+
+import java.net.*;
+import java.util.concurrent.*;
+import java.io.*;
+
+class my_thread extends Thread{
+	InputStream is;
+	static ExecutorService executor = Executors.newCachedThreadPool();
+	public my_thread(InputStream i){
+		is = i;
+	}
+	public void run() {
+		try {
+			int ch;
+			while((ch = is.read()) != -1)
+				System.out.write(ch);
+			System.out.println("* server said ktxbye");
+			System.exit(0);
+		} catch (Exception e) {
+			if(e instanceof SocketException) {
+				System.out.println("* we're at EOF -> the thread is dead");
+			}
+			else e.printStackTrace();
+		}
+	}
+}
+public class Main {
+	public static void main(String[] args) {
+		String host = "localhost";
+		int port = 1982;
+		if(args.length > 0) {
+			host = args[0];
+			if(args.length >1) {
+				port = Integer.parseInt(args[1]);
+			}
+		}
+		try {
+			Socket s = new Socket(host,port);
+			InputStream is = s.getInputStream();
+			OutputStream os = s.getOutputStream();
+			my_thread mt = new my_thread(is);
+			mt.start();
+			int ch;
+			while((ch = System.in.read())!=-1) {
+				os.write(ch);
+			}
+			System.out.println("* we're at EOF");
+			s.close();
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+}
+

nst-0x04/src/nst_0x04/package-info.java

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+package nst_0x04;