我尝试使用此代码,即使ip或主机名为TTL Expired
,unreachable
或任何其他不同的问题,它也始终返回timeout
:
using System.Net.NetworkInformation;
PingReply Reply = await pingo.SendPingAsync(text_ip.Text, 4000, buffer, options);
Toast.MakeText(Activity, Reply.Status.ToString(), ToastLength.Long).Show();
switch (Reply.Status)
{
case IPStatus.Success:
Toast.MakeText(Activity, Reply.Status.ToString(), ToastLength.Long).Show();
break;
case IPStatus.TimedOut:
Toast.MakeText(Activity, Reply.Status.ToString(), ToastLength.Long).Show();
break;
case IPStatus.TimeExceeded:
Toast.MakeText(Activity, Reply.Status.ToString(), ToastLength.Long).Show();
break;
case IPStatus.DestinationHostUnreachable:
Toast.MakeText(Activity, Reply.Status.ToString(), ToastLength.Long).Show();
break;
case IPStatus.DestinationNetworkUnreachable:
Toast.MakeText(Activity, Reply.Status.ToString(), ToastLength.Long).Show();
break;
case IPStatus.DestinationUnreachable:
Toast.MakeText(Activity, Reply.Status.ToString(), ToastLength.Long).Show();
break;
}
我发现了一个错误 https://github.com/mono/mono/blob/master/mcs/class/System/System.Net.NetworkInformation/Ping.cs(第339行)
并报告: https://bugzilla.xamarin.com/show_bug.cgi?id=53284
调用系统ping命令并检查退出代码:
if (!ping.WaitForExit (timeout) || (ping.HasExited && ping.ExitCode == 2))
status = IPStatus.TimedOut;
else if (ping.ExitCode == 0)
status = IPStatus.Success;
else if (ping.ExitCode == 1)
status = IPStatus.TtlExpired;
如果没有超时,没有错误或成功(退出代码2或0),退出代码为1,则设置TTL过期。
如果ping根本没有收到任何回复数据包,它将以
code 1
退出。如果指定了数据包计数和截止时间,并且在截止时间到达之前收到的数据包数量少于计数数据包,则它也将以code 1
退出。在其他错误上,它以code 2
退出。否则它会以code 0
退出。这使得可以使用退出代码来查看主机是否存活。因此,返回值1表示没有收到响应(由于各种原因),Mono实现在这种情况下设置
TTL expired
状态。我希望在这种情况下会返回暂停状态。但似乎没有在此触发timeout
Mono实现的TTL expired
检测(例如,因为ping命令在它之前退出了自己的超时)。所以还有其他可能的解决方案:
要将
TTL expired
视为主机不活动(但这会忽略真正的try { Process ipProcess = runtime.exec("ping -c 1 8.8.8.8"); int exitValue = ipProcess.waitFor(); ipProcess.destroy(); if(exitValue == 0) { // Success } else { // Failure } } catch (IOException | InterruptedException e) { e.printStackTrace(); }
检测)
无论如何,有人可以通过另一种方式表明这一点,例如:
Time in ms
从此Ttl value
,Statistics
,Packet Loss
,Received Packets
,Transmited Packets
,public async void add_data(string adresa)
{
await Task.Delay(ping_interval);
if (sekuenca < sekuenca_db && nderprit == false)
{
try
{
PingReply Reply = await pingo.SendPingAsync(text_ip.Text, timeout, buffer, options);
switch (Reply.Status)
{
case IPStatus.Success:
string sekuena = sekuenca.ToString();
mdata.Add(new data() { titulli = "From : " + Reply.Address.ToString(), sekuenca = "Secuenca : " + sekuena + ",", ttl = "TTL : " + Reply.Options.Ttl.ToString() + ",", madhesia = "Send : " + Reply.Buffer.Length.ToString() + " bytes", koha = "Time : " + Reply.RoundtripTime.ToString() + " ms" });
mAdapter.NotifyItemInserted(mdata.Count() - 1);
if (ndaluar == false)
{
mRecyclerView.ScrollToPosition(mdata.Count() - 1);
}
time = time + Reply.RoundtripTime;
koha.Add(Convert.ToInt32(Reply.RoundtripTime));
add_data(text_ip.Text);
break;
和来自流程外壳的其他信息中获取对于每个ping secuence?
更新
如何为此目的实施它:
X Y
a 1
1
1
b 1
1
1
c 1
答案 0 :(得分:1)
使用操作系统获取ping时间的方法&#39; buit-in ping
命令正在启动一个进程,读取其输出并解析该数据。
所以采取必要的步骤:
System.Diagnostics.Process
对于第一部分(直到字符串),您的代码可能如下所示:
Process P = new Process();
P.StartInfo.FileName = "ping";
P.StartInfo.Arguments = "-c 3 8.8.8.8"; // Take 3 samples to 8.8.8.8
P.StartInfo.UseShellExecute = false;
P.StartInfo.RedirectStandardOutput = true;
string readData = "";
if (P.Start())
readData = P.StandardOutput.ReadToEnd(); // This will also wait for the process to at least close its stdout
Console.Write(readData.ToString()); // Doing this, you will see how the output looks like
在此之后,您将在readData
:
64 bytes from 8.8.8.8: icmp_req=1 ttl=46 time=13.9 ms
64 bytes from 8.8.8.8: icmp_req=2 ttl=46 time=13.9 ms
64 bytes from 8.8.8.8: icmp_req=3 ttl=46 time=13.9 ms
--- 8.8.8.8 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 3016ms
rtt min/avg/max/mdev = 13.910/13.926/13.951/0.010 ms
您现在需要做的就是解析您感兴趣的相关部分。我建议使用System.Text.RegularExpressions.Regex
来实现这一目标。我假设您对平均往返时间感兴趣。在这种情况下,您需要执行以下步骤:
如果您需要的值为float
(或double
),请解析该值
List<string> Lines = new List<string>(readData.Replace("\r\n", "\n").Split('\n'));
while (Lines.Count > 0 && !Lines[0].StartsWith("---"))
Lines.RemoveAt(0);
// Here, we either have an empty list or a list starting with the line --- 8.8.8.8 ping statistics ---
float avgPingTime = 0;
if (Lines.Count > 2)
{
// Our important line is now Lines[2], the one starting with "rtt"
Match M = Regex.Match(Lines[2], @"^rtt [^0-9]*([\d][^\/]+)\/([^\/]+)\/([^\/]+)\/([^ ]+) ms$");
if (M != null && M.Success) // A match has indeed been found
{
string avgPingString = M.Groups[2].Value;
// Now parse that value
float.TryParse(avgPingString, System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, out avgPingTime);
}
}
if (avgPingTime > 0)
{
// We parsed the value correctly here
}
但是,如果您对统计信息之前的每行的统计信息感兴趣,则需要采用不同的方法:
64字节来自8.8.8.8:icmp_req = 2 ttl = 46 time = 13.9 ms
这些行中有n
个,所有这些行之前以---
开头的行:
List<string> Lines = new List<string>(readData.Replace("\r\n", "\n").Split('\n'));
while (Lines.Count > 0 && !Lines[0].StartsWith("---"))
{
Match M = Regex.Match(Lines[0], @"^[\d]+ bytes from ([^:]+): [^ ]+ ttl=([\d]+) time=([^ ]+) ms");
if (M != null && M.Success)
{
string IP = M.Groups[1].Value;
string TTL = M.Groups[2].Value;
string timeStr = M.Groups[3].Value;
Console.WriteLine(String.Format("Ping to {0} took {2} ms with a ttl of {1}", IP, TTL, timeStr));
// Parsing the timeStr will work the same way as above
}
Lines.RemoveAt(0);
}