Add PingService

WoL/Services/IPingService.cs

@@ -0,0 +1,18 @@
+using System.Net;
+using System.Threading.Tasks;
+
+namespace WoL.Services
+{
+    public interface IPingService
+    {
+        Task<bool> IsReachable(IPAddress ip, int timeout);
+        Task<PingResult> IsReachable(string hostname, int timeout);
+
+        public enum PingResult
+        {
+            Unreachable,
+            HostNotFound,
+            Success
+        }
+    }
+}

WoL/Services/PingService.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Net.NetworkInformation;
+using System.Threading.Tasks;
+using static WoL.Services.IPingService;
+
+namespace WoL.Services
+{
+    public class PingService : IPingService
+    {
+        private IAddressLookupService addressLookupService;
+
+        public PingService(IAddressLookupService addressLookupService)
+        {
+            this.addressLookupService = addressLookupService;
+        }
+
+        public async Task<PingResult> IsReachable(string hostname, int timeout)
+        {
+            await Task.Delay(1000);
+            IPAddress ip;
+            try
+            {
+                (ip, _) = await addressLookupService.GetIpAndName(hostname).ConfigureAwait(false);
+            }
+            catch
+            {
+                return PingResult.HostNotFound;
+            }
+            return await IsReachable(ip, timeout).ConfigureAwait(false) ? PingResult.Success : PingResult.Unreachable;
+        }
+
+        public async Task<bool> IsReachable(IPAddress ip, int timeout)
+        {
+            using var ping = new Ping();
+            var reply = await ping.SendPingAsync(ip, timeout).ConfigureAwait(false);
+            return reply.Status == IPStatus.Success;
+        }
+    }
+}

WoL/Startup.cs

@@ -36,6 +36,7 @@ public void ConfigureServices(IServiceCollection services)
             services.AddServerSideBlazor();
             services.AddTransient<IHostService, HostService>();
             services.AddTransient<IWakeService, WakeService>();
+            services.AddTransient<IPingService, PingService>();
             services.AddTransient<IAddressLookupService, AddressLookupService>();
         }