fix: 修复获取主机ip错误的问题

server/src/Controllers/NetConfigController.cs

@@ -153,7 +153,7 @@ public class NetConfigController : ControllerBase
         try
         {
             var netConfig = new NetConfig(BOARD_IP, BOARD_PORT, 0);
-            
+
             var hostIPResult = await netConfig.GetHostIP();
             var boardIPResult = await netConfig.GetBoardIP();
             var hostMACResult = await netConfig.GetHostMAC();
@@ -345,7 +345,8 @@ public class NetConfigController : ControllerBase
     {
         try
         {
-            // 获取本机第一个有效的IPv4地址
+            // 获取所有本机IPv4地址，并选择与实验板IP前三段相同的IP
+            var boardIpSegments = BOARD_IP.Split('.').Take(3).ToArray();
             var ip = System.Net.NetworkInformation.NetworkInterface
                 .GetAllNetworkInterfaces()
                 .Where(nic => nic.OperationalStatus == System.Net.NetworkInformation.OperationalStatus.Up
@@ -353,7 +354,14 @@ public class NetConfigController : ControllerBase
                 .SelectMany(nic => nic.GetIPProperties().UnicastAddresses)
                 .Where(addr => addr.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
                 .Select(addr => addr.Address)
-                .FirstOrDefault();
+                .FirstOrDefault(addr =>
+                {
+                    var segments = addr.ToString().Split('.');
+                    return segments.Length == 4 &&
+                           segments[0] == boardIpSegments[0] &&
+                           segments[1] == boardIpSegments[1] &&
+                           segments[2] == boardIpSegments[2];
+                });
 
             if (ip == null)
                 return StatusCode(StatusCodes.Status500InternalServerError, "无法获取本机IP地址");