/// <summary>
/// Begin an async SNMP request
/// </summary>
/// <param name="peer">Pdu to send to the agent</param>
/// <param name="port">Callback to receive response from the agent</param>
/// <param name="buffer">Buffer containing data to send to the peer</param>
/// <param name="bufferLength">Length of data in the buffer</param>
/// <param name="timeout">Request timeout in milliseconds</param>
/// <param name="retries">Maximum retry count. 0 = single request no further retries.</param>
/// <param name="asyncCallback">Callback that will receive the status and result of the operation</param>
/// <returns>Returns false if another request is already in progress or if socket used by the class
/// has been closed using Dispose() member, otherwise true</returns>
/// <exception cref="SnmpException">Thrown when IPv4 address is passed to the v6 socket or vice versa</exception>
internal bool RequestAsync(IPAddress peer, int port, byte[] buffer, int bufferLength, int timeout, int retries, SnmpAsyncCallback asyncCallback)
{
if (_busy == true)
{
return(false);
}
if (_socket == null)
{
return(false); // socket has been closed. no new operations are possible.
}
if (_socket.AddressFamily != peer.AddressFamily)
{
throw new SnmpException("Invalid address protocol version.");
}
_busy = true;
_asyncCallback = null;
_asyncCallback += asyncCallback;
_requestState = new AsyncRequestState(peer, port, retries, timeout);
_requestState.Packet = buffer;
_requestState.PacketLength = bufferLength;
// _socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, _requestState.Timeout);
_inBuffer = new byte[64 * 1024]; // create incoming data buffer
SendToBegin(); // Send the request
return(true);
}
/// <summary>
/// Begin an async SNMP request
/// </summary>
/// <param name="peer">Pdu to send to the agent</param>
/// <param name="port">Callback to receive response from the agent</param>
/// <param name="buffer">Buffer containing data to send to the peer</param>
/// <param name="bufferLength">Length of data in the buffer</param>
/// <param name="timeout">Request timeout in milliseconds</param>
/// <param name="retries">Maximum retry count. 0 = single request no further retries.</param>
/// <param name="asyncCallback">Callback that will receive the status and result of the operation</param>
/// <returns>Returns false if another request is already in progress or if socket used by the class
/// has been closed using Dispose() member, otherwise true</returns>
/// <exception cref="SnmpException">Thrown when IPv4 address is passed to the v6 socket or vice versa</exception>
internal bool RequestAsync(IPAddress peer, int port, byte[] buffer, int bufferLength, int timeout, int retries, SnmpAsyncCallback asyncCallback)
{
if (_busy == true)
{
return false;
}
if (_socket == null)
{
return false; // socket has been closed. no new operations are possible.
}
if (_socket.AddressFamily != peer.AddressFamily)
throw new SnmpException("Invalid address protocol version.");
_busy = true;
_asyncCallback = null;
_asyncCallback += asyncCallback;
_requestState = new AsyncRequestState(peer, port, retries, timeout);
_requestState.Packet = buffer;
_requestState.PacketLength = bufferLength;
// _socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, _requestState.Timeout);
_inBuffer = new byte[64 * 1024]; // create incoming data buffer
SendToBegin(); // Send the request
return true;
}
