103 lines
3.2 KiB
Java
103 lines
3.2 KiB
Java
package com.janetfilter.core;
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import com.janetfilter.core.attach.VMLauncher;
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import com.janetfilter.core.attach.VMSelector;
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import com.janetfilter.core.commons.DebugInfo;
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import com.janetfilter.core.utils.WhereIsUtils;
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import java.io.File;
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import java.lang.instrument.Instrumentation;
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import java.net.URI;
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import java.util.jar.JarFile;
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public class Launcher {
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public static final String ATTACH_ARG = "--attach";
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public static final String VERSION = "2022.2.0";
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public static final int VERSION_NUMBER = 202201000;
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private static boolean loaded = false;
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public static void main(String[] args) {
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URI jarURI;
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try {
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jarURI = WhereIsUtils.getJarURI();
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} catch (Throwable e) {
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DebugInfo.error("Can not locate `ja-netfilter` jar file.", e);
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return;
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}
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String jarPath = jarURI.getPath();
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if (args.length > 1 && args[0].equals(ATTACH_ARG)) {
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VMLauncher.attachVM(jarPath, args[1], args.length > 2 ? args[2] : null);
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return;
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}
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printUsage();
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try {
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new VMSelector(new File(jarPath)).select();
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} catch (Throwable e) {
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System.err.println(" ERROR: Select virtual machine failed.");
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e.printStackTrace(System.err);
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}
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}
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public static void premain(String args, Instrumentation inst) {
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premain(args, inst, false);
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}
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public static void agentmain(String args, Instrumentation inst) {
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if (null == System.getProperty("janf.debug")) {
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System.setProperty("janf.debug", "1");
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}
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if (null == System.getProperty("janf.output")) {
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System.setProperty("janf.output", "3");
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}
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premain(args, inst, true);
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}
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private static void premain(String args, Instrumentation inst, boolean attachMode) {
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if (loaded) {
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DebugInfo.warn("You have multiple `ja-netfilter` as javaagent.");
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return;
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}
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printUsage();
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URI jarURI;
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try {
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loaded = true;
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jarURI = WhereIsUtils.getJarURI();
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} catch (Throwable e) {
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DebugInfo.error("Can not locate `ja-netfilter` jar file.", e);
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return;
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}
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File agentFile = new File(jarURI.getPath());
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try {
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inst.appendToBootstrapClassLoaderSearch(new JarFile(agentFile));
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} catch (Throwable e) {
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DebugInfo.error("Can not access `ja-netfilter` jar file.", e);
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return;
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}
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Initializer.init(new Environment(inst, agentFile, args, attachMode)); // for some custom UrlLoaders
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}
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private static void printUsage() {
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String content = "\n ============================================================================ \n" +
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"\n" +
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" ja-netfilter " + VERSION +
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"\n\n" +
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" A javaagent framework :)\n" +
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"\n" +
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" https://github.com/ja-netfilter/ja-netfilter\n" +
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"\n" +
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" ============================================================================ \n\n";
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System.out.print(content);
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}
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}
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