public static ISnmpMessage EndGetResponse(this ISnmpMessage request, IAsyncResult asyncResult)
{
if (asyncResult == null)
{
throw new ArgumentNullException(nameof(asyncResult));
}
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
SnmpMessageAsyncResult ar = (SnmpMessageAsyncResult)asyncResult;
Socket s = ar.WorkSocket;
int count = s.EndReceive(ar.Inner);
// Passing 'count' is not necessary because ParseMessages should ignore it, but it offer extra safety (and would avoid an issue if parsing >1 response).
ISnmpMessage response = MessageFactory.ParseMessages(ar.GetBuffer(), 0, count, ar.Users)[0];
SnmpType responseCode = response.TypeCode();
if (responseCode == SnmpType.ResponsePdu || responseCode == SnmpType.ReportPdu)
{
int requestId = request.MessageId();
int responseId = response.MessageId();
if (responseId != requestId)
{
throw OperationException.Create(string.Format(CultureInfo.InvariantCulture, "wrong response sequence: expected {0}, received {1}", requestId, responseId), ar.Receiver.Address);
}
return(response);
}
throw OperationException.Create(string.Format(CultureInfo.InvariantCulture, "wrong response type: {0}", responseCode), ar.Receiver.Address);
}
/// <summary>
/// Begins to asynchronously send an <see cref="ISnmpMessage"/> to an <see cref="IPEndPoint"/>.
/// </summary>
/// <param name="request">The <see cref="ISnmpMessage"/>.</param>
/// <param name="receiver">Agent.</param>
/// <param name="registry">The user registry.</param>
/// <param name="udpSocket">The UDP <see cref="Socket"/> to use to send/receive.</param>
/// <param name="callback">The callback.</param>
/// <param name="state">The state object.</param>
/// <returns></returns>
public static IAsyncResult BeginGetResponse(
this ISnmpMessage request, IPEndPoint receiver, UserRegistry registry, Socket udpSocket, AsyncCallback callback, object state)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
if (udpSocket == null)
{
throw new ArgumentNullException("udpSocket");
}
if (receiver == null)
{
throw new ArgumentNullException("receiver");
}
if (registry == null)
{
throw new ArgumentNullException("registry");
}
var requestCode = request.TypeCode();
if (requestCode == SnmpType.TrapV1Pdu || requestCode == SnmpType.TrapV2Pdu || requestCode == SnmpType.ReportPdu)
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "not a request message: {0}", requestCode));
}
// Whatever you change, try to keep the Send and the Receive close to each other.
udpSocket.SendTo(request.ToBytes(), receiver);
#if CF
var bufferSize = 8192;
#elif SSHARP
var bufferSize = 16384;
#else
var bufferSize = udpSocket.ReceiveBufferSize = Messenger.MaxMessageSize;
#endif
var buffer = new byte[bufferSize];
// https://sharpsnmplib.codeplex.com/workitem/7234
if (callback != null)
{
AsyncCallback wrapped = callback;
callback = asyncResult =>
{
var result = new SnmpMessageAsyncResult(asyncResult, udpSocket, registry, receiver, buffer);
wrapped(result);
};
}
var ar = udpSocket.BeginReceive(buffer, 0, bufferSize, SocketFlags.None, callback, state);
return(new SnmpMessageAsyncResult(ar, udpSocket, registry, receiver, buffer));
}
/// <summary>
/// Begins to asynchronously send an <see cref="ISnmpMessage"/> to an <see cref="IPEndPoint"/>.
/// </summary>
/// <param name="request">The <see cref="ISnmpMessage"/>.</param>
/// <param name="receiver">Agent.</param>
/// <param name="registry">The user registry.</param>
/// <param name="udpSocket">The UDP <see cref="Socket"/> to use to send/receive.</param>
/// <param name="callback">The callback.</param>
/// <param name="state">The state object.</param>
/// <returns></returns>
public static IAsyncResult BeginGetResponse(this ISnmpMessage request, IPEndPoint receiver, UserRegistry registry, Socket udpSocket, AsyncCallback callback, object state)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
if (udpSocket == null)
{
throw new ArgumentNullException("udpSocket");
}
if (receiver == null)
{
throw new ArgumentNullException("receiver");
}
if (registry == null)
{
throw new ArgumentNullException("registry");
}
var requestCode = request.TypeCode();
if (requestCode == SnmpType.TrapV1Pdu || requestCode == SnmpType.TrapV2Pdu || requestCode == SnmpType.ReportPdu)
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "not a request message: {0}", requestCode));
}
// Whatever you change, try to keep the Send and the Receive close to each other.
udpSocket.SendTo(request.ToBytes(), receiver);
#if CF
var bufferSize = 8192;
#else
var bufferSize = udpSocket.ReceiveBufferSize;
#endif
var buffer = new byte[bufferSize];
// http://sharpsnmplib.codeplex.com/workitem/7234
if (callback != null)
{
AsyncCallback wrapped = callback;
callback = asyncResult =>
{
var result = new SnmpMessageAsyncResult(asyncResult, udpSocket, registry, receiver, buffer);
wrapped(result);
};
}
var ar = udpSocket.BeginReceive(buffer, 0, bufferSize, SocketFlags.None, callback, state);
return new SnmpMessageAsyncResult(ar, udpSocket, registry, receiver, buffer);
}
