优化 服务端,客户端代码 解决读取错位的问题。

pom.xml

@@ -18,7 +18,7 @@
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-all</artifactId>
-            <version>4.1.68.Final</version>
+            <version>4.1.110.Final</version>
         </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>

src/main/java/cn/x47/RIPService.java

@@ -38,6 +38,7 @@ public class RIPService {
             scheduler.scheduleAtFixedRate(() -> {
                 RIPPacket packet = createRipResponsePacket(Config.RIP_VERSION);
                 client.sendRipPacket(packet);
+                System.out.println("客户端 发送了一次消息");
             }, 0, 10, TimeUnit.SECONDS);
             System.out.println("客户端已经启动");
         }

src/main/java/cn/x47/config/Config.java

@@ -2,7 +2,7 @@ package cn.x47.config;
 
 public class Config {
     // 设置协议版本，1 表示 RIP v1，2 表示 RIP v2
-    public static final byte RIP_VERSION = 2;
+    public static final byte RIP_VERSION = 1;
     public static final boolean startServer = true;
-    public static final boolean startClient = true;
+    public static final boolean startClient = false;
 }

src/main/java/cn/x47/handle/RIPPacketDecoder.java

@@ -29,26 +29,22 @@ public class RIPPacketDecoder extends MessageToMessageDecoder<DatagramPacket> {
         while (buf.readableBytes() >= 20) {
             RIPEntry entry = new RIPEntry();
             entry.setAddressFamily(buf.readShort());
-            if (ripPacket.getVersion() == 2) {
-                entry.setRouteTag(buf.readShort());
-            } else {
-                entry.setRouteTag((short) 0);
-            }
+            entry.setRouteTag(buf.readShort());
+
             byte[] ipBytes = new byte[4];
             buf.readBytes(ipBytes);
             entry.setIpAddress(InetAddress.getByAddress(ipBytes));
 
-            if (ripPacket.getVersion() == 2) {
-                buf.readBytes(ipBytes);
-                entry.setSubnetMask(InetAddress.getByAddress(ipBytes));
-                buf.readBytes(ipBytes);
-                entry.setNextHop(InetAddress.getByAddress(ipBytes));
-            } else {
+            buf.readBytes(ipBytes);
+            entry.setSubnetMask(InetAddress.getByAddress(ipBytes));
+            buf.readBytes(ipBytes);
+            entry.setNextHop(InetAddress.getByAddress(ipBytes));
+            if (ripPacket.getVersion() == 1) {
                 // 对于 RIP v1，子网掩码和下一跳需要推断或设为默认值
                 entry.setSubnetMask(InetAddress.getByName("255.255.255.0")); // 示例，实际应根据 IP 类推断
                 entry.setNextHop(packet.sender().getAddress());
             }
-            entry.setMetric(buf.readInt());
+            entry.setMetric((int) buf.readUnsignedInt());
             entries.add(entry);
         }
         ripPacket.setEntries(entries);

src/main/java/cn/x47/handle/RIPServerHandler.java

@@ -11,6 +11,7 @@ public class RIPServerHandler extends SimpleChannelInboundHandler<RIPPacket> {
 
     @Override
     protected void channelRead0(ChannelHandlerContext ctx, RIPPacket msg) throws Exception {
+        System.out.println(msg);
         if (msg.getCommand() == 2) { // Response
             for (RIPEntry entry : msg.getEntries()) {
                 // 更新本地路由表

src/main/java/cn/x47/service/RIPClient.java

@@ -11,9 +11,6 @@ import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.channel.socket.DatagramChannel;
 import io.netty.channel.socket.nio.NioDatagramChannel;
 
-import java.net.InetAddress;
-import java.net.UnknownHostException;
-
 
 public class RIPClient {
 
@@ -36,8 +33,7 @@ public class RIPClient {
 
     public void sendRipPacket(RIPPacket packet) {
         try {
-            ChannelFuture future = bootstrap.bind(0)
-                    .sync();
+            ChannelFuture future = bootstrap.bind(0).sync();
             future.channel().writeAndFlush(packet).sync();
             future.channel().close();
         } catch (InterruptedException e) {

src/main/java/cn/x47/service/RIPServer.java

@@ -4,7 +4,9 @@ package cn.x47.service;
 import cn.x47.handle.RIPPacketDecoder;
 import cn.x47.handle.RIPServerHandler;
 import io.netty.bootstrap.Bootstrap;
-import io.netty.channel.*;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.channel.socket.DatagramChannel;
 import io.netty.channel.socket.nio.NioDatagramChannel;