Добавил получение количества tcp и udp соединений

Backend/MonitorAgent/MonitorAgent.API/Contracts/ConnectionsResponse.cs

@@ -0,0 +1,7 @@
+namespace MonitorAgent.API.Contracts;
+
+public class ConnectionsResponse
+{
+    public int Tcp {get;set;}
+    public int Udp {get;set;}
+}

Backend/MonitorAgent/MonitorAgent.API/Controllers/MonitorController.cs

@@ -48,4 +48,17 @@ public class MonitorController(
 
         return Ok(response);
     }
+
+    [HttpGet("connections")]
+    public async Task<ActionResult> GetConnectionsCountAsync(CancellationToken cancellationToken = default)
+    {
+        var count = await monitorService.GetConnectionsCountAsync(cancellationToken);
+        var response = new ConnectionsResponse
+        {
+             Tcp = count.TcpCount,
+             Udp = count.UdpCount 
+        };
+
+        return Ok(response);
+    }
 }

Backend/MonitorAgent/MonitorAgent.Application/Services/MonitorService.cs

@@ -74,5 +74,16 @@ public class MonitorService : IMonitorService
         return loadavg;
     }
 
+    // TODO: проверить на других системах
+    public async Task<ConnectionsCount> GetConnectionsCountAsync(CancellationToken cancellationToken = default)
+    {
+        var sockstat = await File.ReadAllLinesAsync("/proc/net/sockstat", cancellationToken);
+        
+        return new ConnectionsCount(
+            int.Parse(sockstat[0].Split()[2]),
+            int.Parse(sockstat[1].Split()[2])
+        );
+    }
+    
     public static int ParseInt(string str) => int.Parse(Regex.Match(str, @"\d+").Value);
 }

Backend/MonitorAgent/MonitorAgent.Core/Abstraction/IMonitorService.cs

@@ -4,9 +4,11 @@ namespace MonitorAgent.Core.Abstraction;
 
 public interface IMonitorService
 {
-    public Task<decimal> GetUptimeAsync(CancellationToken cancellationToken = default);
+    public Task<decimal> GetUptimeAsync(CancellationToken cancellationToken);
     
-    public Task<MemoryInfo> GetMemoryInfoAsync(CancellationToken cancellationToken = default);
+    public Task<MemoryInfo> GetMemoryInfoAsync(CancellationToken cancellationToken);
 
-    public Task<decimal[]> GetLoadAverageAsync(CancellationToken cancellationToken = default);
+    public Task<decimal[]> GetLoadAverageAsync(CancellationToken cancellationToken);
+
+    public Task<ConnectionsCount> GetConnectionsCountAsync(CancellationToken cancellationToken);
 }

Backend/MonitorAgent/MonitorAgent.Core/Models/ConnectionsCount.cs

@@ -0,0 +1,7 @@
+namespace MonitorAgent.Core.Models;
+
+public class ConnectionsCount(int tcp, int udp)
+{
+    public readonly int TcpCount = tcp;
+    public readonly int UdpCount = udp;
+}