get actual IP from connection

MareSynchronosServer/MareSynchronosServer/Extensions.cs

@@ -0,0 +1,24 @@
+using Microsoft.AspNetCore.Http;
+
+namespace MareSynchronosServer
+{
+    public static class Extensions
+    {
+        public static string GetIpAddress(this IHttpContextAccessor accessor)
+        {
+            if (!string.IsNullOrEmpty(accessor.HttpContext.Request.Headers["CF-CONNECTING-IP"]))
+                return accessor.HttpContext.Request.Headers["CF-CONNECTING-IP"];
+
+            var ipAddress = accessor.HttpContext.GetServerVariable("HTTP_X_FORWARDED_FOR");
+
+            if (!string.IsNullOrEmpty(ipAddress))
+            {
+                var addresses = ipAddress.Split(',');
+                if (addresses.Length != 0)
+                    return addresses.Last();
+            }
+
+            return accessor.HttpContext.Connection.RemoteIpAddress.ToString();
+        }
+    }
+}

MareSynchronosServer/MareSynchronosServer/Hubs/MareHub.cs

@@ -8,6 +8,7 @@ using MareSynchronosServer.Authentication;
 using MareSynchronosServer.Data;
 using MareSynchronosServer.Metrics;
 using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.AspNetCore.SignalR;
 using Microsoft.EntityFrameworkCore;
@@ -33,7 +34,7 @@ namespace MareSynchronosServer.Hubs
         }
 
         [HubMethodName(Api.InvokeHeartbeat)]
-        public async Task<ConnectionDto> Heartbeat(string? characterIdentification)
+        public async Task<ConnectionDto> Heartbeat(string characterIdentification)
         {
             MareMetrics.InitializedConnections.Inc();
 
@@ -86,8 +87,8 @@ namespace MareSynchronosServer.Hubs
 
         public override Task OnConnectedAsync()
         {
-            var feature = Context.Features.Get<IHttpConnectionFeature>();
+            var feature = Context.Features.Get<IHttpContextAccessor>();
-            _logger.LogInformation("Connection from " + feature.RemoteIpAddress);
+            _logger.LogInformation("Connection from " + feature.GetIpAddress());
             MareMetrics.Connections.Inc();
             return base.OnConnectedAsync();
         }