From 7978817492119307cd35d4ba5940c8337edfddb2 Mon Sep 17 00:00:00 2001
From: icylogic <withguohao@gmail.com>
Date: Mon, 17 Aug 2015 11:32:03 +0800
Subject: [PATCH] fixed #280, log "No such host is known" and other
 PingException

---
 .../Service/AvailabilityStatistics.cs         | 23 ++++++++++++-------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs b/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
index 5a95dbc2..0d8463a6 100644
--- a/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
+++ b/shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
@@ -67,14 +67,21 @@ namespace Shadowsocks.Controller
                     string timestamp = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                     //ICMP echo. we can also set options and special bytes
                     //seems no need to use SendPingAsync
-                    PingReply reply = ping.Send(server.server, Timeout);
-                    state.data = new List<KeyValuePair<string, string>>();
-                    state.data.Add(new KeyValuePair<string, string>("Timestamp", timestamp));
-                    state.data.Add(new KeyValuePair<string, string>("Server", server.FriendlyName()));
-                    state.data.Add(new KeyValuePair<string, string>("Status", reply.Status.ToString()));
-                    state.data.Add(new KeyValuePair<string, string>("RoundtripTime", reply.RoundtripTime.ToString()));
-                    //state.data.Add(new KeyValuePair<string, string>("data", reply.Buffer.ToString())); // The data of reply
-                    Append(state.data);
+                    try
+                    {
+                        PingReply reply = ping.Send(server.server, Timeout);
+                        state.data = new List<KeyValuePair<string, string>>();
+                        state.data.Add(new KeyValuePair<string, string>("Timestamp", timestamp));
+                        state.data.Add(new KeyValuePair<string, string>("Server", server.FriendlyName()));
+                        state.data.Add(new KeyValuePair<string, string>("Status", reply.Status.ToString()));
+                        state.data.Add(new KeyValuePair<string, string>("RoundtripTime", reply.RoundtripTime.ToString()));
+                        //state.data.Add(new KeyValuePair<string, string>("data", reply.Buffer.ToString())); // The data of reply
+                        Append(state.data);
+                    }
+                    catch (Exception e)
+                    {
+                        Logging.LogUsefulException(e);
+                    }
                 }
             }
         }