SNMPv2 getBulkRequest and setRequest

cherple

I am working on a colleagues code and I am extremely new to this. I am trying to write a setRequest and getBulkRequest function. He has already written the get request function and it's working.
So I have 2 problems:

I copied his get request method as I understand setrequest should be the same except that that the value in the variable binding instead of being NULL should be the value u wish to set. I did manage to set but in my console there is this message: "QSocketNotifier: Socket notifiers cannot be enabled or disabled from another thread"
I am not sure how the format of the pdu for getbulkrequest should be written. I have the pdu format online as pdu type, request I'd, non repeaters, max repetitions followed by object name and value. Am I supposed to set a value in non repeaters and max repetition? Or is it supposed to be set by the response? Is the length of the max repetition and non repeaters supposed to be 4 bytes long? Or is it 1byte?

This is the format that I am using, could anyone advise me on whether I am doing it right or not:

switch(pdyType) {
case PdyType::GET_BULK_REQUEST:

for (QStringList::ConstIterator iter = oids.begin(); iter != oids.end(); ++iter)
{

  QByteArray keyHolder;

  //value
  keyHolder.push_front(QByteArray(1, 0x00));
  keyHolder.push_front(QByteArray(1, DataType::DATA_NULL));

  //object identifier
  QByteArray temp = encodeoid(*iter);
  keyHolder.push_front(temp);
  keyHolder.push_front(encodeLengthField(temp.size()));
  keyHolder.push_front(QByteArray(1, DataType::OBJECT_ID));

  //varbind
  keyHolder.push_front(encodeLengthField(keyHolder.size()));
  keyHolder.push_front(QByteArray(1, DataType::SEQUENCE));

  datagram.push_front(keyHolder);
}

//max-reperitions
datagram.push_front(QByteArray(4, 0);
datagram.push_front(QByteArray(1, 4);
datagram.push_front(QByteArray(1, DataType::INTEGER);

//varbind list
datagram.push_front(QByteArray(encodeLengthField(datagram.size());
datagram.push_front(QByteArray(1, DataType::SEQUENCE);

//non-repeaters
datagram.push_front(QByteArray(4, 0);
datagram.push_front(QByteArray(1, 4);
datagram.push_front(QByteArray(1, DataType::INTEGER);

//requestId
datagram.push_front(QByteArray(1, requestId));
datagram.push_front(QByteArray(1, 1);
datagram.push_front(QByteArray(1, DataType::INTEGER);

//pdu
datagram.push_front(QByteArray(encodeLengthField(datagram.size()));
datagram.push_front(QByteArray(1, (unsigned char)pduType);

//community string
datagram.push_front(QByteArray(community.toLocal8Bit()));
datagram.push_front(QByteArray(encodeLengthField(community.size());
datagram.push_front(QByteArray(1, DataType::OCTET_STRING);

//version
datagram.push_front(QByteArray(1, 0));
datagram.push_front(QByteArray(1, 1);
datagram.push_front(QByteArray(1, DataType::INTEGER);

//message type
datagram.push_front(QByteArray(encodeLengthField(datagram.size()));
datagram.push_front(QByteArray(1, DataType::SEQUENCE);
break;

default:
break;
}
return datagram;

Is the format correct for getBulkRequest to be set out via QUdpSocket::writeDatagram?

I hope I am able to phrase my issue clearly. As I am not very sure what is going on at the moment and trying to read up more.

SGaist

Hi,

Are you using threads in your application ?

cherple

@SGaist I am not exactly sure. I am able to set the sysName using the oid "1.3.6.1.2.1.1.5.0" though.. Just that the message regarding the QSocketNotifier would appear.

SGaist

Setting a QString and using a socket are not exactly the same thing hence my question about the thread.