我正在基于 Sharp-SNMP 库（snmptrapd）中包含的示例制作一个应用程序原型，以从 SNMP 协议获取一些数据，但已完全停止工作，由于某种未知原因停止工作，但不抛出任何异常，编译并执行得好。
问题在于事件永远不会发生。
依赖关系：
我必须指出，直到两天前，这还很有效，但现在，我已经没有想法了。 （而且我没有修改我的代码中的一些激进的东西）。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using Lextm.SharpSnmpLib;
using Lextm.SharpSnmpLib.Security;
using Lextm.SharpSnmpLib.Messaging;
using Lextm.SharpSnmpLib.Pipeline;
using Lextm.SharpSnmpLib.Mib;
using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using Microsoft.Practices.Unity.Utility;
using System.Configuration;
using SourceGrid;
namespace Kraken
{
public partial class frmConsola : Form
{
internal static IUnityContainer Container { get; private set; }
private SnmpEngine engine;
// Delegates ....
private delegate void MostrarMensajeDelegate(SourceGrid.Grid oGrd, DateTime eventTime, String eventType, IPAddress agentAddress, String Elemento, String Valor);
public frmConsola()
{
InitializeComponent();
this.crear_demonio_trampas();
this.crear_grid();
}
private void crear_grid()
{
grdData.BorderStyle = BorderStyle.FixedSingle;
grdData.ColumnsCount = 6;
grdData.FixedRows = 1;
grdData.Rows.Insert(0);
grdData[0, 0] = new SourceGrid.Cells.ColumnHeader("Id");
grdData[0, 1] = new SourceGrid.Cells.ColumnHeader("Hora");
grdData[0, 2] = new SourceGrid.Cells.ColumnHeader("Tipo");
grdData[0, 3] = new SourceGrid.Cells.ColumnHeader("Agente");
grdData[0, 4] = new SourceGrid.Cells.ColumnHeader("Elemento");
grdData[0, 5] = new SourceGrid.Cells.ColumnHeader("Valor");
grdData.AutoSizeCells();
}
public void MostrarMensaje(SourceGrid.Grid oGrd, DateTime eventTime, String eventType, IPAddress agentAddress, String Elemento, String Valor)
{
int r = 0;
if (!oGrd.IsDisposed)
{
r = oGrd.Rows.Count;
oGrd.Rows.Insert(r);
oGrd[r, 0] = new SourceGrid.Cells.Cell(r.ToString(), typeof(string));
oGrd[r, 1] = new SourceGrid.Cells.Cell("?", typeof(string));
oGrd[r, 2] = new SourceGrid.Cells.Cell(eventType, typeof(string));
oGrd[r, 3] = new SourceGrid.Cells.Cell(agentAddress.ToString(), typeof(string));
oGrd[r, 4] = new SourceGrid.Cells.Cell(Elemento, typeof(string));
oGrd[r, 5] = new SourceGrid.Cells.Cell(Valor, typeof(string));
grdData.AutoSizeCells();
}
else
{
throw (new ObjectDisposedException(oGrd.Name.ToString()));
}
}
private void crear_demonio_trampas()
{
Container = new UnityContainer().LoadConfiguration("snmptrapd");
var users = Container.Resolve<UserRegistry>();
users.Add(new OctetString("neither"), DefaultPrivacyProvider.DefaultPair);
users.Add(new OctetString("authen"), new DefaultPrivacyProvider(new MD5AuthenticationProvider(new OctetString("authentication"))));
users.Add(new OctetString("privacy"), new DESPrivacyProvider(new OctetString("privacyphrase"),
new MD5AuthenticationProvider(new OctetString("authentication"))));
// -------------- Plantas de fuerza ----------------------
users.Add(new OctetString("PCC"), DefaultPrivacyProvider.DefaultPair);
users.Add(new OctetString("peacct"), DefaultPrivacyProvider.DefaultPair);
// -------------------------------------------------------
var trapv1 = Container.Resolve<TrapV1MessageHandler>("TrapV1Handler");
trapv1.MessageReceived += WatcherTrapV1Received;
var trapv2 = Container.Resolve<TrapV2MessageHandler>("TrapV2Handler");
trapv2.MessageReceived += WatcherTrapV2Received;
var inform = Container.Resolve<InformRequestMessageHandler>("InformHandler");
inform.MessageReceived += WatcherInformRequestReceived;
this.engine = Container.Resolve<SnmpEngine>();
}
private void WatcherInformRequestReceived(object sender, InformRequestMessageReceivedEventArgs e)
{
string sTipo = "";
uint[] codigo;
Object[] oParams = new Object[6];
oParams[0] = this.grdData;
oParams[1] = new DateTime(e.InformRequestMessage.TimeStamp);
codigo = e.InformRequestMessage.Enterprise.ToNumerical();
foreach (int num in codigo)
{
if (sTipo != null)
sTipo += ".";
sTipo += num.ToString();
}
oParams[2] = sTipo;
oParams[3] = null;
oParams[4] = e.InformRequestMessage.Variables()[0].ToString();
oParams[5] = "";
BeginInvoke(new MostrarMensajeDelegate(MostrarMensaje), oParams);
}
private void WatcherTrapV2Received(object sender, TrapV2MessageReceivedEventArgs e)
{
string sTipo = "";
uint[] codigo;
Object[] oParams = new Object[6];
oParams[0] = this.grdData;
oParams[1] = new DateTime(e.TrapV2Message.TimeStamp);
codigo = e.TrapV2Message.Enterprise.ToNumerical();
foreach (int num in codigo)
{
if (sTipo != null)
sTipo += ".";
sTipo += num.ToString();
}
oParams[2] = sTipo;
oParams[3] = null;
oParams[4] = e.TrapV2Message.Variables()[0].Id.ToString();
oParams[5] = e.TrapV2Message.Variables()[0].Data.ToString();
BeginInvoke(new MostrarMensajeDelegate(MostrarMensaje), oParams);
}
private void WatcherTrapV1Received(object sender, TrapV1MessageReceivedEventArgs e)
{
string sTipo = "";
uint[] codigo;
Object[] oParams = new Object[6];
oParams[0] = this.grdData;
oParams[1] = new DateTime(e.TrapV1Message.TimeStamp);
codigo = e.TrapV1Message.Enterprise.ToNumerical();
foreach (int num in codigo)
{
if (sTipo != null)
sTipo += ".";
sTipo += num.ToString();
}
oParams[2] = sTipo;
oParams[3] = e.TrapV1Message.AgentAddress;
oParams[4] = e.TrapV1Message.Variables()[0].Id.ToString();
oParams[5] = e.TrapV1Message.Variables()[0].Data.ToString();
//DateTime eventTime, String eventType, IPAddress agentAddress, String infoText
BeginInvoke(new MostrarMensajeDelegate(MostrarMensaje), oParams);
}
private void Form1_Shown(object sender, EventArgs e)
{
this.engine.Listener.AddBinding(new IPEndPoint(IPAddress.Any, 162));
this.engine.Start();
this.txtStatus.Text = "Iniciando Captura ...";
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
this.engine.Stop();
this.txtStatus.Text = "... Finalizando Captura.";
}
}
}
<?xml version="1.0"?>
<configuration>
<configSections>
<section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration"/>
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
<unity>
<namespace name="Lextm.SharpSnmpLib.Pipeline"/>
<namespace name="Lextm.SharpSnmpLib.Messaging"/>
<namespace name="Lextm.SharpSnmpLib.Security"/>
<namespace name="Lextm.SharpSnmpLib.Mib"/>
<namespace name="Lextm.SharpSnmpLib"/>
<assembly name="SharpSnmpLib"/>
<assembly name="SharpSnmpLib.Engine"/>
<assembly name="SharpSnmpLib.Mib"/>
<aliases>
<add alias="singleton" type="Microsoft.Practices.Unity.ContainerControlledLifetimeManager, Microsoft.Practices.Unity"/>
</aliases>
<containers>
<container name="snmptrapd">
<!-- users -->
<register type="UserRegistry">
<lifetime type="singleton"/>
<constructor>
<param name="users" dependencyType="User[]"/>
</constructor>
</register>
<!-- message handler settings-->
<register type="MessageHandlerFactory" name="MessageFactory">
<lifetime type="singleton"/>
<constructor>
<param name="mappings">
<array>
<!--here we only have four-->
<dependency name="TRAPV1"/>
<dependency name="TRAPV2"/>
<dependency name="INFORM"/>
<dependency name="ALL"/>
</array>
</param>
</constructor>
</register>
<register type="HandlerMapping" name="TRAPV1">
<lifetime type="singleton"/>
<constructor>
<param name="version" value="v1"/>
<param name="command" value="TRAPV1"/>
<param name="handler" dependencyType="IMessageHandler" dependencyName="TrapV1Handler"/>
</constructor>
</register>
<register type="HandlerMapping" name="TRAPV2">
<lifetime type="singleton"/>
<constructor>
<param name="version" value="v2,v3"/>
<param name="command" value="TRAPV2"/>
<param name="handler" dependencyType="IMessageHandler" dependencyName="TrapV2Handler"/>
</constructor>
</register>
<register type="HandlerMapping" name="INFORM">
<lifetime type="singleton"/>
<constructor>
<param name="version" value="v2,v3"/>
<param name="command" value="INFORM"/>
<param name="handler" dependencyType="IMessageHandler" dependencyName="InformHandler"/>
</constructor>
</register>
<register type="HandlerMapping" name="ALL">
<lifetime type="singleton"/>
<constructor>
<param name="version" value="*"/>
<param name="command" value="*"/>
<param name="handler" dependencyType="IMessageHandler" dependencyName="NullHandler"/>
</constructor>
</register>
<register type="IMessageHandler" mapTo="TrapV1MessageHandler" name="TrapV1Handler">
<lifetime type="singleton"/>
</register>
<register type="IMessageHandler" mapTo="TrapV2MessageHandler" name="TrapV2Handler">
<lifetime type="singleton"/>
</register>
<register type="IMessageHandler" mapTo="InformRequestMessageHandler" name="InformHandler">
<lifetime type="singleton"/>
</register>
<register type="IMessageHandler" mapTo="NullMessageHandler" name="NullHandler">
<lifetime type="singleton"/>
</register>
<!-- application factory and its parts -->
<register type="SnmpApplicationFactory">
<lifetime type="singleton"/>
<constructor>
<!--<param name="logger" />-->
<param name="store" dependencyType="ObjectStore"/>
<param name="membershipProvider" dependencyType="IMembershipProvider" dependencyName="Composed"/>
<param name="factory" dependencyType="MessageHandlerFactory"/>
</constructor>
</register>
<register type="ObjectStore">
<lifetime type="singleton"/>
</register>
<!-- this is the membership provider -->
<register type="IMembershipProvider" mapTo="ComposedMembershipProvider" name="Composed">
<lifetime type="singleton"/>
<constructor>
<param name="providers">
<array>
<dependency name="v1"/>
<dependency name="v2"/>
<dependency name="v3"/>
</array>
</param>
</constructor>
</register>
<register type="IMembershipProvider" mapTo="Version1MembershipProvider" name="v1">
<lifetime type="singleton"/>
<constructor>
<param name="getCommunity" dependencyType="OctetString" dependencyName="get"/>
<param name="setCommunity" dependencyType="OctetString" dependencyName="set"/>
</constructor>
</register>
<register type="IMembershipProvider" mapTo="Version2MembershipProvider" name="v2">
<lifetime type="singleton"/>
<constructor>
<param name="getCommunity" dependencyType="OctetString" dependencyName="get"/>
<param name="setCommunity" dependencyType="OctetString" dependencyName="set"/>
</constructor>
</register>
<register type="IMembershipProvider" mapTo="Version3MembershipProvider" name="v3">
<lifetime type="singleton"/>
</register>
<register type="OctetString" name="get">
<lifetime type="singleton"/>
<constructor>
<param name="content" value="public"/>
</constructor>
</register>
<register type="OctetString" name="set">
<lifetime type="singleton"/>
<constructor>
<param name="content" value="public"/>
</constructor>
</register>
<!-- Engine -->
<register type="SnmpEngine">
<lifetime type="singleton"/>
<constructor>
<param name="factory" dependencyType="SnmpApplicationFactory"/>
<param name="listener" dependencyType="Listener"/>
<param name="group" dependencyType="EngineGroup"/>
</constructor>
</register>
<register type="Listener">
<lifetime type="singleton"/>
<property name="Users" dependencyType="UserRegistry"/>
</register>
</container>
</containers>
</unity>
</configuration>
调试时，首先请熟悉管道模型，
https://docs.lextudio.com/blog/honeycell-drops-snmp-pipeline-and-our-agent-demo-89986da1a5da
然后，连接调试器并检查您使用的 ListenerBinding (https://github.com/lextm/sharpsnmplib/blob/master/SharpSnmpLib/Messaging/ListenerBinding.cs) 是否从线路接收到任何 SNMP 数据包。
之后，继续处理管道 SnmpApplication 的下一个对象 (https://github.com/lextm/sharpsnmplib/blob/master/SharpSnmpLib/Pipeline/SnmpApplication.cs)。
逐步您可能会发现为什么没有触发事件。
此外，您也可以订阅 SnmpEngine.ExceptionRaished 来查看是否有异常发生。