fix: 使用C#自带的ping来刷新arp

server/src/UdpServer.cs

@@ -1,5 +1,6 @@
 using System.Collections.Concurrent;
 using System.Net;
+using System.Net.NetworkInformation; // 添加这个引用
 using System.Net.Sockets;
 using System.Runtime.CompilerServices;
 using System.Text;
@@ -216,6 +217,8 @@ public class UDPServer : IDisposable
                 if (udpData.TryGetValue(key, out var sortedList) && sortedList.Count > 0)
                 {
                     data = new List<UDPData>(sortedList.Values);
+                    // 输出数据
+                    // PrintDataArray(data);
                     sortedList.Clear();
                     break;
                 }
@@ -436,6 +439,9 @@ public class UDPServer : IDisposable
             }
 
             sortedList.Add(uniqueTime, data);
+            // 输出单个数据
+            PrintData(data);
+            // 输出全部数据
             // PrintAllData();
         }
         finally
@@ -495,6 +501,19 @@ public class UDPServer : IDisposable
         ";
     }
 
+    /// <summary>
+    /// 输出UDP Data数组到log中
+    /// </summary>
+    /// <param name="dataArray">UDP数据列表</param>
+    public void PrintDataArray(IEnumerable<UDPData> dataArray)
+    {
+        foreach (var data in dataArray)
+        {
+            logger.Debug(PrintData(data));
+        }
+    }
+
+
     /// <summary>
     /// 将所有数据输出到log中
     /// </summary>
@@ -561,6 +580,95 @@ public class UDPServer : IDisposable
                 return;
             }
 
+            // 异步执行ARP刷新，避免阻塞主线程
+            Task.Run(() => ExecuteArpFlush(ipAddr));
+        }
+        catch (Exception ex)
+        {
+            logger.Error($"Error during ARP cache flush for {ipAddr}: {ex.Message}");
+        }
+    }
+
+    /// <summary>
+    /// 使用Ping类重新刷新ARP缓存
+    /// </summary>
+    /// <param name="ipAddr">目标IP地址</param>
+    private async void RefreshArpWithPing(string ipAddr)
+    {
+        try
+        {
+            using var ping = new Ping();
+            var options = new PingOptions
+            {
+                DontFragment = true,
+                Ttl = 32,
+            };
+
+            // 创建32字节的数据包
+            byte[] buffer = new byte[32];
+            for (int i = 0; i < buffer.Length; i++)
+            {
+                buffer[i] = (byte)(i % 256);
+            }
+
+            // 异步发送ping，100ms超时
+            var reply = await ping.SendPingAsync(ipAddr, 100, buffer, options);
+
+            if (reply.Status == IPStatus.Success)
+            {
+                logger.Debug($"ARP cache refreshed successfully for {ipAddr} (RTT: {reply.RoundtripTime}ms)");
+            }
+            else
+            {
+                logger.Warn($"Ping to {ipAddr} failed with status: {reply.Status}, but ARP entry should still be updated");
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.Error($"Error refreshing ARP with ping for {ipAddr}: {ex.Message}");
+        }
+    }
+
+    /// <summary>
+    /// 执行ARP刷新流程：先删除ARP条目，再用ping重新刷新
+    /// </summary>
+    /// <param name="ipAddr">目标IP地址</param>
+    private async void ExecuteArpFlush(string ipAddr)
+    {
+        try
+        {
+            // 第一步：删除ARP条目
+            bool deleteSuccess = DeleteArpEntry(ipAddr);
+
+            if (deleteSuccess)
+            {
+                logger.Debug($"ARP entry deleted successfully for {ipAddr}");
+
+                // 第二步：使用Ping类重新刷新ARP缓存
+                RefreshArpWithPing(ipAddr);
+            }
+            else
+            {
+                logger.Warn($"Failed to delete ARP entry for {ipAddr}, but continuing with ping refresh");
+                // 即使删除失败，也尝试ping刷新
+                RefreshArpWithPing(ipAddr);
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.Error($"Failed to execute ARP flush for {ipAddr}: {ex.Message}");
+        }
+    }
+
+    /// <summary>
+    /// 删除ARP条目
+    /// </summary>
+    /// <param name="ipAddr">目标IP地址</param>
+    /// <returns>是否成功删除</returns>
+    private bool DeleteArpEntry(string ipAddr)
+    {
+        try
+        {
             string command;
             string arguments;
 
@@ -572,12 +680,11 @@ public class UDPServer : IDisposable
             }
             else if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
             {
-                // Linux/macOS: ip neigh del <ip> dev <interface> (优先使用 ip 命令)
-                // 如果 ip 命令不可用，则使用 arp -d <ip>
+                // Linux/macOS: 优先使用 ip 命令删除
                 if (IsCommandAvailable("ip"))
                 {
                     command = "ip";
-                    arguments = $"neigh flush {ipAddr}";
+                    arguments = $"neigh del {ipAddr}";
                 }
                 else if (IsCommandAvailable("arp"))
                 {
@@ -586,22 +693,22 @@ public class UDPServer : IDisposable
                 }
                 else
                 {
-                    logger.Warn("Neither 'ip' nor 'arp' command is available for ARP cache flush");
-                    return;
+                    logger.Warn("Neither 'ip' nor 'arp' command is available for ARP entry deletion");
+                    return false;
                 }
             }
             else
             {
-                logger.Warn($"Unsupported operating system for ARP cache flush");
-                return;
+                logger.Warn($"Unsupported operating system for ARP entry deletion");
+                return false;
             }
 
-            // 异步执行命令，避免阻塞主线程
-            Task.Run(() => ExecuteArpCommand(command, arguments, ipAddr));
+            return ExecuteCommand(command, arguments, $"delete ARP entry for {ipAddr}");
         }
         catch (Exception ex)
         {
-            logger.Error($"Error during ARP cache flush for {ipAddr}: {ex.Message}");
+            logger.Error($"Error deleting ARP entry for {ipAddr}: {ex.Message}");
+            return false;
         }
     }
 
@@ -637,12 +744,13 @@ public class UDPServer : IDisposable
     }
 
     /// <summary>
-    /// 执行ARP命令
+    /// 执行系统命令
     /// </summary>
     /// <param name="command">命令</param>
     /// <param name="arguments">参数</param>
-    /// <param name="ipAddr">IP地址</param>
-    private void ExecuteArpCommand(string command, string arguments, string ipAddr)
+    /// <param name="operation">操作描述</param>
+    /// <returns>是否成功执行</returns>
+    private bool ExecuteCommand(string command, string arguments, string operation)
     {
         try
         {
@@ -669,22 +777,26 @@ public class UDPServer : IDisposable
 
                 if (process.ExitCode == 0)
                 {
-                    logger.Debug($"ARP cache flush successful for {ipAddr}");
+                    logger.Debug($"Command executed successfully: {operation}");
+                    return true;
                 }
                 else
                 {
-                    logger.Warn($"ARP cache flush failed for {ipAddr}. Exit code: {process.ExitCode}, Error: {error}");
+                    logger.Warn($"Command failed: {operation}. Exit code: {process.ExitCode}, Error: {error}");
+                    return false;
                 }
             }
             else
             {
                 process.Kill();
-                logger.Warn($"ARP cache flush command timed out for {ipAddr}");
+                logger.Warn($"Command timed out: {operation}");
+                return false;
             }
         }
         catch (Exception ex)
         {
-            logger.Error($"Failed to execute ARP cache flush command for {ipAddr}: {ex.Message}");
+            logger.Error($"Failed to execute command for {operation}: {ex.Message}");
+            return false;
         }
     }