IPFIX 数据通过 UDP 传输至 C# - 我可以解码数据吗？
我有来自 MSDN 网站的代码示例，用于创建 UDP 侦听器/客户端，因为我尝试从防火墙接收 IPFIX/Netflow 数据，然后使用收到的数据。 该代码确实有效并开始接收数据，但它的行话（见下文）所以我想我没有正确解码它。
有谁知道我需要做什么才能以正确的格式获取数据？
我使用的代码是：
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
public class ConsoleApplication2
{
private const int listenPort = 2055;
private static void StartListener()
{
bool done = false;
UdpClient listener = new UdpClient(listenPort);
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, listenPort);
try
{
while (!done)
{
Console.WriteLine("Waiting for broadcast");
byte[] bytes = listener.Receive(ref groupEP);
Console.WriteLine("Received broadcast from {0} :\n {1}\n",
groupEP.ToString(),
Encoding.ASCII.GetString(bytes, 0, bytes.Length));
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
finally
{
listener.Close();
}
}
public static int Main()
{
StartListener();
return 0;
}
}
我得到的数据是：
?M?▼? '$▬+？ ☺☺ ?M?▼???k` &??_?07????Q??E?U?j ♥ ☻
♠ P ♣ x ♣ ► ♥ → ♦ ☼？M？▼？M？▼？ 1♠►?
？ ☺
预先感谢，
詹姆斯
I have a code sample from the MSDN website to create a UDP listener/client as I am trying to receive IPFIX/Netflow data from a firewall and then work with the data I receive.
The code does work and starts to reveive data but its jargon (see below) so I guess I am not decoding it correctly.
Does anyone have any ideas what I need to do to be able to get the data in the correct format?
The code I am using is:
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
public class ConsoleApplication2
{
private const int listenPort = 2055;
private static void StartListener()
{
bool done = false;
UdpClient listener = new UdpClient(listenPort);
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, listenPort);
try
{
while (!done)
{
Console.WriteLine("Waiting for broadcast");
byte[] bytes = listener.Receive(ref groupEP);
Console.WriteLine("Received broadcast from {0} :\n {1}\n",
groupEP.ToString(),
Encoding.ASCII.GetString(bytes, 0, bytes.Length));
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
finally
{
listener.Close();
}
}
public static int Main()
{
StartListener();
return 0;
}
}
And the data I get back is:
?M?▼? '$▬+? ☺☺ ?M?▼???k`
&??_?07????Q??E?U?j ♥ ☻
♠ P ♣ x ♣ ► ♥ → ♦
☼?M?▼?M?▼? 1♠ ►?
? ☺
Thanks in advance,
James
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您假设接收到的数据是 ASCII 格式，但事实上它的结构如下： 参见此处。这些消息有一个 标题和数据集等。您需要评估基于标准的数据，而不仅仅是直接的文本转换。
这里以消息头格式为例。文本转换根本不会对此执行任何操作：
3.1。消息头格式
You're assuming that the data being received is in ASCII format when in fact it's structured thusly: See here. The messages have a header and data sets etc. You need to evaluate the data based on the standard, not just a straight text conversion.
Here, for example is the message header format. A text conversion simply won't do anything with this:
3.1. Message Header Format