123 lines
3.3 KiB
Java
123 lines
3.3 KiB
Java
package com.vnt;
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/**
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* VNT网络实例
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*
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* 代表一个VNT网络连接，持有native资源
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*/
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public class VntNetwork {
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private long nativeHandle;
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private boolean closed = false;
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// 包内构造，只能通过VntManager创建
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VntNetwork(long handle) {
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this.nativeHandle = handle;
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}
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/**
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* 注册网络（连接服务器）
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* @return 注册结果，包含分配的IP、掩码等信息
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* @throws VntException 注册失败时抛出异常
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*/
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public RegisterResult register() throws VntException {
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checkClosed();
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String resultJson = nativeRegister(nativeHandle);
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return RegisterResult.fromJson(resultJson);
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}
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/**
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* 启动TUN设备
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* @param tunFd TUN设备文件描述符（Android VpnService.Builder.establish()返回的fd）
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* 传入-1表示让VNT自动创建（仅非Android平台支持）
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* @throws VntException 启动失败时抛出异常
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*/
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public void startTun(int tunFd) throws VntException {
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checkClosed();
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if (!nativeStartTun(nativeHandle, tunFd)) {
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throw new VntException("Failed to start TUN device");
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}
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}
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/**
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* 设置网络IP（仅非Android平台使用）
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* @param ip IP地址
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* @param prefixLen 前缀长度
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* @throws VntException 设置失败时抛出异常
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*/
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public void setNetworkIp(String ip, int prefixLen) throws VntException {
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checkClosed();
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if (!nativeSetNetworkIp(nativeHandle, ip, prefixLen)) {
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throw new VntException("Failed to set network IP");
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}
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}
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/**
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* 获取VNT API实例
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* @return VntApi实例
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* @throws VntException 获取失败时抛出异常
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*/
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public VntApi getApi() throws VntException {
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checkClosed();
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long apiHandle = nativeGetApi(nativeHandle);
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if (apiHandle < 0) {
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throw new VntException("Failed to get VntApi");
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}
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return new VntApi(apiHandle);
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}
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/**
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* 检查是否为无TUN模式
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* @return true表示无TUN模式
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*/
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public boolean isNoTun() {
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checkClosed();
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return nativeIsNoTun(nativeHandle);
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}
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/**
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* 停止并关闭网络
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*/
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public void stop() {
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if (closed) {
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return;
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}
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nativeStop(nativeHandle);
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closed = true;
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}
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/**
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* 获取native句柄（供内部使用）
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*/
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long getNativeHandle() {
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return nativeHandle;
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}
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/**
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* 检查是否已关闭
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*/
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private void checkClosed() {
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if (closed) {
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throw new IllegalStateException("VntNetwork has been closed");
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}
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}
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@Override
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protected void finalize() throws Throwable {
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try {
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stop();
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} finally {
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super.finalize();
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}
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}
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// ========== Native 方法 ==========
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private static native String nativeRegister(long handle);
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private static native boolean nativeStartTun(long handle, int tunFd);
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private static native boolean nativeSetNetworkIp(long handle, String ip, int prefixLen);
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private static native long nativeGetApi(long handle);
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private static native boolean nativeIsNoTun(long handle);
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private static native boolean nativeStop(long handle);
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}
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