public void receiveAndSendHello(RingInfo ringInfo, Peer peer, Neighbor neighbor,
BinaryWriter writer)
{
if(!peer.node.syncCommunicationPoint.Address.Equals(neighbor.peer.node.syncCommunicationPoint.Address))
//REVISIT: alert security system
return;
neighbor.peer.node.syncCommunicationPoint = peer.node.syncCommunicationPoint;
neighbor.peer.node.asyncCommunicationPoint = peer.node.asyncCommunicationPoint;
neighbor.peer.IE = peer.IE;
byte[] message = new byte[Constants.WRITEBUFFSIZE];
MemoryStream stream;
try
{
User user = User.getInstance();
BinaryFormatter serializer = new BinaryFormatter();
stream = new MemoryStream(message);
NetLib.insertEntropyHeader(serializer, stream);
serializer.Serialize(stream, Constants.MessageTypes.MSG_HELLO);
serializer.Serialize(stream, ringInfo.ring.ringID);
serializer.Serialize(stream, ringInfo.token);
serializer.Serialize(stream, new Peer(user.node, user.publicUserInfo, ringInfo.IE));
writer.Write(message);
writer.Flush();
}
catch (Exception e)
{
int x = 2;
}
}
/// <summary>
/// Returns the list of best choices for neighbors to send out the query request to.
/// The list is not sorted. REVISIT: perhaps the list should be sorted
/// </summary>
/// <param name="query"></param>
/// <returns></returns>
private Neighbor[] determineBestChoiceNeighbors(string[] query)
{
Neighbor[] bestChoiceNeighbors = new Neighbor[neighbors.Count];
uint insertIndex = 0;
RelevanceRanking ranker = RelevanceRanking.getInstance();
float score = 0.0f;
foreach (Neighbor neighbor in neighbors)
{
score = ranker.calculateScore(query, neighbor.peer.IE);
if (score >= Constants.PEER_SELECTION_THRESHOLD)
bestChoiceNeighbors[insertIndex++] = neighbor;
}
if (insertIndex == 0) //all neighbors had a score of 0.0
{
foreach (Neighbor neighbor in neighbors)
{
if (neighbor == null || insertIndex >= Constants.MAX_PEERS_TO_QUERY)
break;
bestChoiceNeighbors[insertIndex++] = neighbor;
}
}
return bestChoiceNeighbors;
}
/// <summary>
///
/// </summary>
/// <param name="reader"></param>
/// <param name="writer"></param>
private void processHelloRequest(BinaryReader reader, BinaryWriter writer)
{
try
{
BinaryFormatter deserializer = new BinaryFormatter();
uint ringID = (uint)deserializer.Deserialize(reader.BaseStream);
ulong token = (ulong)deserializer.Deserialize(reader.BaseStream);
Peer peer = (Peer)deserializer.Deserialize(reader.BaseStream);
RingInfo ringInfo = RingInfo.findRingInfoByID(User.getInstance().ringsInfo, ringID);
Neighbor neighbor = RingInfo.findNeighbor(ringInfo.neighbors, token);
if(neighbor == null)
{
neighbor = new Neighbor(peer, new NeighborProxy());
ringInfo.neighbors.Add(neighbor);
}
neighbor.neighborProxy.receiveAndSendHello(ringInfo, peer, neighbor, writer);
}
catch (Exception e)
{
int x = 2;
}
}
