// GET message handler class.// Copyright (C) 2010 Lex Li// // Permission is hereby granted, free of charge, to any person obtaining a copy of this// software and associated documentation files (the "Software"), to deal in the Software// without restriction, including without limitation the rights to use, copy, modify, merge,// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons// to whom the Software is furnished to do so, subject to the following conditions://// The above copyright notice and this permission notice shall be included in all copies or// substantial portions of the Software.//// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER// DEALINGS IN THE SOFTWARE.using System;using System.Collections.Generic;using GSF.Net.Snmp.Messaging;namespace GSF.Net.Snmp.Pipeline{ /// <summary> /// GET message handler. /// </summary> /// <remarks> /// Follows RFC 3416 4.2.1. /// </remarks> public sealed class GetMessageHandler : IMessageHandler { /// <summary> /// Handles the specified message. /// </summary> /// <param name="context">The context.</param> /// <param name="store">The object store.</param> /// <returns></returns> [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")] public void Handle(ISnmpContext context, ObjectStore store) { if (context == null) { throw new ArgumentNullException(nameof(context)); } if (store == null) { throw new ArgumentNullException(nameof(store)); } int index = 0; IList<Variable> result = new List<Variable>(); foreach (Variable v in context.Request.Pdu().Variables) { index++; try { ScalarObject obj = store.GetObject(v.Id); if (obj == null) { result.Add(new Variable(v.Id, new NoSuchInstance())); } else { Variable item = obj.Variable; result.Add(item); } } catch (AccessFailureException) { result.Add(new Variable(v.Id, new NoSuchObject())); } catch (Exception) { context.CopyRequest(ErrorCode.GenError, index); return; } } context.GenerateResponse(result); } }}
// GET message handler class.
// Copyright (C) 2010 Lex Li
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
using System.Collections.Generic;
using GSF.Net.Snmp.Messaging;
namespace GSF.Net.Snmp.Pipeline
{
/// <summary>
/// GET message handler.
/// </summary>
/// <remarks>
/// Follows RFC 3416 4.2.1.
/// </remarks>
public sealed class GetMessageHandler : IMessageHandler
{
/// <summary>
/// Handles the specified message.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="store">The object store.</param>
/// <returns></returns>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
public void Handle(ISnmpContext context, ObjectStore store)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (store == null)
{
throw new ArgumentNullException(nameof(store));
}
int index = 0;
IList<Variable> result = new List<Variable>();
foreach (Variable v in context.Request.Pdu().Variables)
{
index++;
try
{
ScalarObject obj = store.GetObject(v.Id);
if (obj == null)
{
result.Add(new Variable(v.Id, new NoSuchInstance()));
}
else
{
Variable item = obj.Variable;
result.Add(item);
}
}
catch (AccessFailureException)
{
result.Add(new Variable(v.Id, new NoSuchObject()));
}
catch (Exception)
{
context.CopyRequest(ErrorCode.GenError, index);
return;
}
}
context.GenerateResponse(result);
}
}
}