public static void sendResourceInfo(IPEndPoint destination, RingInfo ringInfo, Resource[] resources)
{
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_QUERYHIT);
serializer.Serialize(stream, ringInfo.ring.ringID);
serializer.Serialize(stream, ringInfo.token);
serializer.Serialize(stream, new Peer(user.node, user.publicUserInfo, ringInfo.IE));
serializer.Serialize(stream, resources.Length);
foreach (Resource resource in resources)
{
serializer.Serialize(stream, resource.header);
}
NetLib.communicateAsync(destination, message, false);
}
catch (Exception e)
{
int x = 2;
}
}
public QueryCache(string[] __query, IPEndPoint __sender, uint __ringID, DateTime __timestamp)
{
query = __query;
sender = __sender;
ringID = __ringID;
timestamp = __timestamp;
}
/// <summary>
/// Connects to the end point (node) and sends message to it. If waitForReply is set
/// it will wait for a reply from the node and return the reply
/// </summary>
/// <param name="node">The end point (node) in the network to communicate with</param>
/// <param name="message">Message to send to node</param>
/// <param name="waitForReply">Whether a reply is expected</param>
/// <returns></returns>
public static byte[] communicate(IPEndPoint node, byte[] message, bool waitForReply)
{
NetworkStream nodeStream = null;
BinaryReader reader = null;
BinaryWriter writer = null;
byte[] reply = new byte[Constants.READBUFFSIZE];
int bytesRead = 0;
try
{
nodeStream = OpenCommunicationChannel(node);
reader = new BinaryReader(nodeStream);
writer = new BinaryWriter(nodeStream);
writer.Write(message);
writer.Flush();
if(waitForReply)
bytesRead = reader.Read(reply, 0, reply.Length);
reader.Close();
writer.Close();
}
catch (Exception e)
{
return null;
}
finally
{
nodeStream.Close();
}
if(bytesRead == 0)
return null;
return reply;
}
/// <summary>
/// Connects to the end point (node) and sends message to it. If waitForReply is set
/// it will wait for a reply from the node and return the reply. It uses Asynchronous UDP
/// protocol
/// </summary>
/// <param name="node">The end point (node) in the network to communicate with</param>
/// <param name="message">Message to send to node</param>
/// <param name="waitForReply">Whether a reply is expected</param>
/// <returns></returns>
public static byte[] communicateAsync(IPEndPoint node, byte[] message, bool waitForReply)
{
Connection nodeConnection = null;
UdpClient udpClient = null;
byte[] reply = null;
try
{
//connect to node
nodeConnection = new Connection(node);
udpClient = nodeConnection.connect_async();
if(udpClient == null)
{
nodeConnection.disconnect_async();
return null;
}
udpClient.Send(message, message.Length);
System.Net.IPEndPoint senderEndPoint = new System.Net.IPEndPoint(0,0);
if(waitForReply)
reply = udpClient.Receive(ref senderEndPoint);
}
catch (Exception e)
{
return null;
}
finally
{
nodeConnection.disconnect_async();
}
if(reply != null && reply.Length == 0)
return null;
return reply;
}
public static NetworkStream OpenCommunicationChannel(IPEndPoint node)
{
Connection nodeConnection = null;
NetworkStream nodeStream = null;
try
{
//connect to node
nodeConnection = new Connection(node);
nodeStream = nodeConnection.connect_sync();
if(nodeStream == null)
{
nodeConnection.disconnect_sync();
return null;
}
}
catch (Exception e)
{
int x = 2;
if(nodeConnection != null)
nodeConnection.disconnect_sync();
}
return nodeStream;
}
/*public static void listenAndCommunicate(IPEndPoint localEndPoint, handleConnection handler)
{
TcpClient client;
byte[] buffer = new byte[Constants.READBUFFSIZE];
MemoryStream stream = new MemoryStream(buffer);
try
{
TcpListener listener = new TcpListener(localEndPoint);
listener.Start();
//ConnectionState state = new ConnectionState(handler, socket, buffer);
while (true)
{
TcpConnectionDone.Reset();
client = listener.AcceptTcpClient();
if (client.GetStream().CanRead)
{
client.GetStream().Read(buffer, 0, buffer.Length);
handler(new BinaryReader(stream), new BinaryWriter(stream));
//client.GetStream().BeginRead(state.buffer, 0, state.buffer.Length, SocketFlags.None,
// new AsyncCallback(ReceiveCallback), state);
//socket.BeginReceive(state.buffer, 0, state.buffer.Length, SocketFlags.None,
// new AsyncCallback(ReceiveCallback), state);
TcpConnectionDone.WaitOne();
}
}
}
catch (Exception e)
{
int x = 2;
}
}*/
public static void listenAndCommunicateAsync(IPEndPoint localEndPoint, handleConnection handler)
{
Socket socket;
byte[] buffer = new byte[Constants.READBUFFSIZE];
try
{
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.Bind(localEndPoint.GetEndPoint());
ConnectionState state = new ConnectionState(handler, socket, buffer);
while (true)
{
UdpConnectionDone.Reset();
socket.BeginReceive(state.buffer, 0, state.buffer.Length, SocketFlags.None,
new AsyncCallback(ReceiveCallback), state);
UdpConnectionDone.WaitOne();
}
}
catch (Exception e)
{
int x = 2;
}
}
public static void listenAndCommunicate(IPEndPoint localEndPoint, handleConnection handler)
{
TcpListener TCPListener = null;
Socket newConnection = null;
NetworkStream clientStream = null;
BinaryReader reader = null;
BinaryWriter writer = null;
byte[] buffer = new byte[Constants.READBUFFSIZE];
try
{
TCPListener = new TcpListener(localEndPoint.GetEndPoint());
TCPListener.Start();
while(true)
{
newConnection = TCPListener.AcceptSocket();
//newConnection.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.KeepAlive,
// 1);
if(!newConnection.Connected)
{
newConnection.Close();
continue;
}
//Get streams to the client so we can read and write to it.
clientStream = new NetworkStream(newConnection);
//If we can't read and write to the client abort connection
if(!clientStream.CanRead || !clientStream.CanWrite)
{
clientStream.Close();
newConnection.Close();
continue;
}
reader = new BinaryReader(clientStream);
writer = new BinaryWriter(clientStream);
//newConnection.Receive(buffer, 0, buffer.Length, SocketFlags.None);
reader.Read(buffer, 0, buffer.Length);
reader = new BinaryReader(new MemoryStream(buffer));
//process the message
handler(reader, writer);
reader.Close();
writer.Close();
clientStream.Close();
newConnection.Close();
}
}
catch (Exception e)
{
int x = 2;
}
finally
{
if(clientStream != null)
clientStream.Close();
if(newConnection != null)
newConnection.Close();
}
}
public Ring(uint __ringID, string __ringName, IPEndPoint[] __lords)
{
ringID = __ringID;
ringName = __ringName;
lords = __lords;
}
public Connection(IPEndPoint __node)
{
node = __node;
}
public LordInfo(uint __ringID, IPEndPoint[] __lords)
{
ringID = __ringID;
lords = __lords;
}
public LordInfo(uint __ringID, IPEndPoint __lord)
{
ringID = __ringID;
lords = new IPEndPoint[1];
lords[0] = __lord;
}
public Node(IPEndPoint syncCommPoint, IPEndPoint asyncCommPoint, Constants.LineSpeedType __lineSpeed)
{
syncCommunicationPoint = syncCommPoint;
asyncCommunicationPoint = asyncCommPoint;
lineSpeed = __lineSpeed;
}
private void getRingNeighbors(IPEndPoint lord, Ring ring)
{
byte[] message = new byte[Constants.WRITEBUFFSIZE];
byte[] reply = new byte[Constants.READBUFFSIZE];
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_RINGLOGIN);
serializer.Serialize(stream, ring.ringID);
RingInfo ringInfo = user.findRingInfo(ring.ringID);
serializer.Serialize(stream, ringInfo.userName);
serializer.Serialize(stream, SecurityLib.encrypt(ringInfo.password));
serializer.Serialize(stream, user.node.syncCommunicationPoint);
serializer.Serialize(stream, ringInfo.IE);
reply = NetLib.communicate(lord, message, true);
BinaryFormatter deserializer = new BinaryFormatter();
stream = new MemoryStream(reply);
NetLib.bypassEntropyHeader(deserializer, stream);
Constants.MessageTypes replyMsg = (Constants.MessageTypes)deserializer.Deserialize(stream);
Constants.QueryHandlerType howToHandleQuery;
switch(replyMsg)
{
case Constants.MessageTypes.MSG_RINGNEIGHBORS:
ringInfo.token = (ulong)serializer.Deserialize(stream);
howToHandleQuery = (Constants.QueryHandlerType)serializer.Deserialize(stream);
ringInfo.queryServer = (IPEndPoint)serializer.Deserialize(stream);
switch(howToHandleQuery)
{
case Constants.QueryHandlerType.SERVER_FORM_QUERY:
ringInfo.searchRing =
new RingInfo.ringSearcher(ringInfo.searchRingServerFormQuery);
break;
case Constants.QueryHandlerType.SERVER_RESOLVE_QUERY:
ringInfo.searchRing =
new RingInfo.ringSearcher(ringInfo.searchRingServerResolveQuery);
break;
case Constants.QueryHandlerType.DISTRIBUTED_PEER_QUERY:
ringInfo.searchRing =
new RingInfo.ringSearcher(ringInfo.searchRingDistributedP2PEntropy);
break;
}
Peer[] neighbors = (Peer[])deserializer.Deserialize(stream);
foreach (Peer neighbor in neighbors)
ringInfo.neighbors.Add(new Neighbor(neighbor, new NeighborProxy()));
break;
default:
ringInfo.neighbors = null;
break;
}
}
catch (Exception e)
{
int x = 2;
}
}
