init

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

@@ -1,6 +1,5 @@
 package cn.x47.handle;
 
-
 import cn.x47.model.RIPEntry;
 import cn.x47.model.RIPPacket;
 import io.netty.buffer.ByteBuf;
@@ -28,14 +27,12 @@ public class RIPPacketDecoder extends MessageToMessageDecoder<DatagramPacket> {
         List<RIPEntry> entries = new ArrayList<>();
         while (buf.readableBytes() >= 20) {
             RIPEntry entry = new RIPEntry();
-            entry.setAddressFamily((short) buf.readUnsignedShort());
+            entry.setAddressFamily(buf.readShort());
-
             if (ripPacket.getVersion() == 2) {
-                entry.setRouteTag((short) buf.readUnsignedShort());
+                entry.setRouteTag(buf.readShort());
             } else {
                 entry.setRouteTag((short) 0);
             }
-
             byte[] ipBytes = new byte[4];
             buf.readBytes(ipBytes);
             entry.setIpAddress(InetAddress.getByAddress(ipBytes));
@@ -50,15 +47,10 @@ public class RIPPacketDecoder extends MessageToMessageDecoder<DatagramPacket> {
                 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());
-            long metric = buf.readUnsignedInt();
-            entry.setMetric(metric);
-
             entries.add(entry);
         }
         ripPacket.setEntries(entries);
-        ripPacket.setSenderAddress(packet.sender()); // 设置发送者地址
         out.add(ripPacket);
     }
-
 }

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

@@ -21,22 +21,20 @@ public class RIPPacketEncoder extends MessageToMessageEncoder<RIPPacket> {
         // 编码命令和版本
         buf.writeByte(msg.getCommand());
         buf.writeByte(msg.getVersion());
-        buf.writeShort(msg.getUnused()); // unused 字段
+        buf.writeShort(0); // unused 字段
 
         // 编码路由条目
         for (RIPEntry entry : msg.getEntries()) {
-            buf.writeShort(entry.getAddressFamily() & 0xFFFF);
+            buf.writeShort(entry.getAddressFamily());
             if (msg.getVersion() == 2) {
-                buf.writeShort(entry.getRouteTag() & 0xFFFF);
+                buf.writeShort(entry.getRouteTag());
             }
             buf.writeBytes(entry.getIpAddress().getAddress());
-
             if (msg.getVersion() == 2) {
                 buf.writeBytes(entry.getSubnetMask().getAddress());
                 buf.writeBytes(entry.getNextHop().getAddress());
             }
-
+            buf.writeInt(entry.getMetric());
-            buf.writeInt((int) entry.getMetric() & 0xFFFFFFFF);
         }
 
         // 根据版本选择目标地址
@@ -49,5 +47,4 @@ public class RIPPacketEncoder extends MessageToMessageEncoder<RIPPacket> {
 
         out.add(new DatagramPacket(buf, recipient));
     }
-
 }

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

@@ -1,185 +1,35 @@
 package cn.x47.handle;
 
+
 import cn.x47.model.RIPEntry;
 import cn.x47.model.RIPPacket;
-import cn.x47.service.RoutingTable;
-import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.SimpleChannelInboundHandler;
-import io.netty.channel.socket.DatagramPacket;
-
-import java.net.InetAddress;
-import java.net.InetSocketAddress;
-import java.nio.ByteOrder;
-import java.util.ArrayList;
-import java.util.List;
 
 public class RIPServerHandler extends SimpleChannelInboundHandler<RIPPacket> {
 
     @Override
     protected void channelRead0(ChannelHandlerContext ctx, RIPPacket msg) throws Exception {
-        InetSocketAddress senderAddress = msg.getSenderAddress();
+        System.out.println(msg);
-        byte version = msg.getVersion();
+        if (msg.getCommand() == 2) { // Response
-        System.out.println(msg.toString());
+            for (RIPEntry entry : msg.getEntries()) {
-
+                // 更新本地路由表
-//        if (msg.getCommand() == 2) { // Response
+                updateRoutingTable(entry);
-//            for (RIPEntry entry : msg.getEntries()) {
-//                // 更新本地路由表
-//                updateRoutingTable(entry, senderAddress, version);
-//            }
-//        } else if (msg.getCommand() == 1) { // Request
-//            // 处理请求，发送响应包
-//            handleRequest(ctx, msg);
-//        }
-    }
-
-    private void handleRequest(ChannelHandlerContext ctx, RIPPacket requestPacket) throws Exception {
-        List<RIPEntry> requestEntries = requestPacket.getEntries();
-        byte version = requestPacket.getVersion();
-
-        boolean isGeneralRequest = false;
-
-        // 检查是否为一般请求
-        if (requestEntries.size() == 1) {
-            RIPEntry entry = requestEntries.get(0);
-            if (entry.getIpAddress().getHostAddress().equals("0.0.0.0") && entry.getMetric() == 16) {
-                isGeneralRequest = true;
             }
-        }
+        } else if (msg.getCommand() == 1) {
-
+            for (RIPEntry entry : msg.getEntries()) {
-        RIPPacket responsePacket = new RIPPacket();
+                // 更新本地路由表
-        responsePacket.setCommand((byte) 2); // Response
+                updateRoutingTable(entry);
-        responsePacket.setVersion(version); // 与请求的版本一致
-        responsePacket.setUnused((short) 0);
-        List<RIPEntry> responseEntries = new ArrayList<>();
-
-        if (isGeneralRequest) {
-            // 一般请求，返回整个路由表
-            responseEntries.addAll(getAllRoutingEntries(version));
-        } else {
-            // 特定请求，逐一处理请求的条目
-            for (RIPEntry requestEntry : requestEntries) {
-                RIPEntry route = getRoutingEntry(requestEntry.getIpAddress());
-                if (route != null) {
-                    responseEntries.add(route);
-                } else {
-                    // 如果没有该路由，返回度量值为 16（无限）
-                    RIPEntry unreachableEntry = new RIPEntry();
-                    unreachableEntry.setAddressFamily(requestEntry.getAddressFamily());
-                    unreachableEntry.setIpAddress(requestEntry.getIpAddress());
-                    unreachableEntry.setMetric(16);
-
-                    if (version == 2) {
-                        unreachableEntry.setRouteTag((short) 0);
-                        unreachableEntry.setSubnetMask(requestEntry.getSubnetMask());
-                        unreachableEntry.setNextHop(InetAddress.getByName("0.0.0.0"));
-                    }
-
-                    responseEntries.add(unreachableEntry);
-                }
             }
-        }
+            // 处理请求，可能需要发送响应包
-
+            // ...
-        // 构建响应包
-        responsePacket.setEntries(responseEntries);
-
-        // 获取发送者的地址
-        InetSocketAddress recipient = requestPacket.getSenderAddress();
-
-        // 发送响应包
-        ByteBuf buf = ctx.alloc().buffer().order(ByteOrder.BIG_ENDIAN); // 确保使用大端序
-        encodeRIPPacket(responsePacket, buf);
-
-        DatagramPacket responseDatagram = new DatagramPacket(buf, recipient);
-        ctx.writeAndFlush(responseDatagram);
-    }
-
-    private void encodeRIPPacket(RIPPacket msg, ByteBuf buf) throws Exception {
-        // 编码命令和版本
-        buf.writeByte(msg.getCommand());
-        buf.writeByte(msg.getVersion());
-        buf.writeShort(0); // unused 字段
-
-        // 编码路由条目
-        for (RIPEntry entry : msg.getEntries()) {
-            buf.writeShort(entry.getAddressFamily());
-            if (msg.getVersion() == 2) {
-                buf.writeShort(entry.getRouteTag());
-            }
-            buf.writeBytes(entry.getIpAddress().getAddress());
-
-            if (msg.getVersion() == 2) {
-                buf.writeBytes(entry.getSubnetMask().getAddress());
-                buf.writeBytes(entry.getNextHop().getAddress());
-            }
-            buf.writeInt((int) (entry.getMetric() & 0xFFFFFFFFL));
         }
     }
 
-    private List<RIPEntry> getAllRoutingEntries(byte version) throws Exception {
+    private void updateRoutingTable(RIPEntry entry) {
-        List<RIPEntry> entries = new ArrayList<>();
-        // 从路由表中获取所有的路由条目
-        for (RIPEntry route : RoutingTable.getInstance().getRoutes().values()) {
-            RIPEntry entry = new RIPEntry();
-            entry.setAddressFamily(route.getAddressFamily());
-            entry.setIpAddress(route.getIpAddress());
-            entry.setMetric(route.getMetric());
-
-            if (version == 2) {
-                entry.setRouteTag(route.getRouteTag());
-                entry.setSubnetMask(route.getSubnetMask());
-                entry.setNextHop(route.getNextHop());
-            }
-
-            entries.add(entry);
-        }
-        return entries;
-    }
-
-    private RIPEntry getRoutingEntry(InetAddress ipAddress) throws Exception {
-        RIPEntry route = RoutingTable.getInstance().getRoute(ipAddress);
-        if (route != null) {
-            RIPEntry entry = new RIPEntry();
-            entry.setAddressFamily(route.getAddressFamily());
-            entry.setIpAddress(route.getIpAddress());
-            entry.setMetric(route.getMetric());
-
-            entry.setRouteTag(route.getRouteTag());
-            entry.setSubnetMask(route.getSubnetMask());
-            entry.setNextHop(route.getNextHop());
-
-            return entry;
-        }
-        return null;
-    }
-
-    private void updateRoutingTable(RIPEntry entry, InetSocketAddress senderAddress, byte version) throws Exception {
-        if (version == 1) {
-            // 推断下一跳为发送者的地址
-            entry.setNextHop(senderAddress.getAddress());
-            // 根据 IP 地址类别推断子网掩码
-            InetAddress ipAddress = entry.getIpAddress();
-            byte[] addressBytes = ipAddress.getAddress();
-            int firstOctet = addressBytes[0] & 0xFF;
-
-            if (firstOctet >= 0 && firstOctet <= 127) {
-                // A 类地址
-                entry.setSubnetMask(InetAddress.getByName("255.0.0.0"));
-            } else if (firstOctet >= 128 && firstOctet <= 191) {
-                // B 类地址
-                entry.setSubnetMask(InetAddress.getByName("255.255.0.0"));
-            } else if (firstOctet >= 192 && firstOctet <= 223) {
-                // C 类地址
-                entry.setSubnetMask(InetAddress.getByName("255.255.255.0"));
-            } else {
-                // 非法地址，忽略
-                System.out.println("Invalid IP address in RIP Entry: " + ipAddress.getHostAddress());
-                return;
-            }
-        }
         // 实现路由表更新逻辑
-        RoutingTable.getInstance().updateRoute(entry);
+        // 这里只是示例，实际需要处理路由添加、更新、超时等逻辑
-        System.out.println("Updated route: " + entry.getIpAddress().getHostAddress() +
+        System.out.println("Received route: " + entry.getIpAddress().getHostAddress() +
                 " via " + entry.getNextHop().getHostAddress() +
                 " metric: " + entry.getMetric());
     }

src/main/java/cn/x47/model/RIPEntry.java

@@ -11,7 +11,7 @@ public class RIPEntry {
     private InetAddress ipAddress;
     private InetAddress subnetMask;    // RIP v2 特有
     private InetAddress nextHop;       // RIP v2 特有
-    private long metric;
+    private int metric;
 
 
 }

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

@@ -4,13 +4,12 @@ package cn.x47.service;
 import cn.x47.handle.RIPPacketEncoder;
 import cn.x47.model.RIPPacket;
 import io.netty.bootstrap.Bootstrap;
-import io.netty.channel.*;
+import io.netty.channel.ChannelFuture;
-import io.netty.channel.socket.nio.NioDatagramChannel;
+import io.netty.channel.ChannelInitializer;
-import io.netty.channel.socket.DatagramChannel;
+import io.netty.channel.ChannelOption;
-
 import io.netty.channel.nio.NioEventLoopGroup;
-
+import io.netty.channel.socket.DatagramChannel;
-
+import io.netty.channel.socket.nio.NioDatagramChannel;
 
 public class RIPClient {
 
@@ -33,14 +32,21 @@ public class RIPClient {
 
     public void sendRipPacket(RIPPacket packet) {
         try {
-            ChannelFuture future = bootstrap.bind(0).sync();
+            ChannelFuture future = bootstrap.bind(600).sync();  // 部分环境下需不同端口尝试
-            future.channel().writeAndFlush(packet).sync();
+            future.channel().writeAndFlush(packet).addListener(f -> {
-            future.channel().close();
+                if (f.isSuccess()) {
+                    System.out.println("Packet sent successfully");
+                } else {
+                    System.err.println("Failed to send packet: " + f.cause().getMessage());
+                }
+            });
+            future.channel().closeFuture().sync();  // 等待，保持通道开启
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
     }
 
+
     public void shutdown() {
         group.shutdownGracefully();
     }

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

@@ -1,38 +0,0 @@
-package cn.x47.service;
-
-
-import cn.x47.model.RIPEntry;
-
-import java.net.InetAddress;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-public class RoutingTable {
-    private static RoutingTable instance = new RoutingTable();
-    private Map<InetAddress, RIPEntry> routes;
-
-    private RoutingTable() {
-        routes = new ConcurrentHashMap<>();
-    }
-
-    public static RoutingTable getInstance() {
-        return instance;
-    }
-
-    public void updateRoute(RIPEntry entry) {
-        // 简单地将新路由添加或更新到路由表中
-        routes.put(entry.getIpAddress(), entry);
-    }
-
-    public void removeRoute(InetAddress ipAddress) {
-        routes.remove(ipAddress);
-    }
-
-    public Map<InetAddress, RIPEntry> getRoutes() {
-        return routes;
-    }
-
-    public RIPEntry getRoute(InetAddress ipAddress) {
-        return routes.get(ipAddress);
-    }
-}