private bool HandleUpdate(RequestEventArgs e, NetworkRequest req)
{
if (req.AuthKey == model.Network.Overlord.Secret)
{
model.Network.Overlord.LastUpdate = Environment.TickCount;
var verb = new UpdateVerb();
verb.ProcessRequest(req);
foreach (Node node in verb.Nodes)
{
Node search = model.Network.Nodes.Where(i => i.ID == node.ID).FirstOrDefault();
if (search == null)
{
//Dont allow partial updates to create clients. Only full updates should contain the online flag.
if (node.ContainsKey("Online") && node.ContainsKey("Nickname") && node.ContainsKey("ID"))
{
model.Network.Nodes.Add(node);
}
}
else
{
foreach (var param in node.Data)
{
search.SetData(param.Key, param.Value);
}
//Has the client disconnected?
if (!search.Online)
{
model.Network.Nodes.Remove(node);
logger.Trace("Client: Node offline update: " + node.ID);
}
}
}
SendOk(e);
return(true);
}
return(false);
}
/// <summary>
/// Handle updates from local clients, external overlords and peers on external overlords from their overlord.
/// </summary>
/// <param name="e"></param>
/// <param name="req"></param>
/// <returns></returns>
private bool HandleUpdate(RequestEventArgs e, NetworkRequest req)
{
try
{
var verb = new UpdateVerb();
verb.ProcessRequest(req);
//Ignore updates about ourself
if (verb.Nodes != null && verb.Nodes.Count == 1 && verb.Nodes[0].ID == serverNode.ID)
{
SendResponse(e, null);
return(true);
}
//Is the call from a local client?
ClientStream localClient =
connectedClientNodes.ToList().Where(
n =>
n.Node.ID == req.SourceID && n.Node.Secret == req.AuthKey &&
n.Node.NodeType != ClientType.Overlord).FirstOrDefault();
if (null != localClient)
{
//Only allow updates about itself
Node client = verb.Nodes.Where(n => n.ID == localClient.Node.ID).FirstOrDefault();
if (null != client && verb.Nodes.Count == 1)
{
logger.Trace("Server got update from local client {0}", client.ID);
lock (sync)
{
//Copy to local store
foreach (var value in verb.Nodes[0].Data)
{
localClient.Node.SetData(value.Key, value.Value);
}
req.OverlordID = serverNode.ID;
//Retransmit
SendToOverlordClients(req);
SendToStandardClients(req);
//Has the client disconnected?
if (!localClient.Node.Online)
{
localClient.Kill();
connectedClientNodes.Remove(localClient);
}
}
SendResponse(e, null);
return(true);
}
}
else
{
//Is the update from an external overlord?
Uplink overlord =
extOverlordServers.ToList().Where(
n =>
n.Destination.ID == req.OverlordID && n.Destination.Secret == req.AuthKey &&
n.Destination.NodeType == ClientType.Overlord).FirstOrDefault();
if (null != overlord)
{
logger.Trace("Server got update from external overlord {0}", overlord.Destination.ID);
//Check each update
var nverb = new UpdateVerb();
foreach (Node update in verb.Nodes)
{
if (!string.IsNullOrEmpty(update.ID))
{
//Ignore updates about ourself
if (update.ID == serverNode.ID)
{
continue;
}
lock (sync)
{
//Is the update about the overlord itself?
Uplink osearch =
extOverlordServers.Where(
o => o.Destination.ID == update.ID && o.Destination.Secret == req.AuthKey).
FirstOrDefault();
if (null != osearch)
{
logger.Trace("Server got update from external about itself: {0}",
osearch.Destination.ID);
//Copy to local store
foreach (var value in update.Data)
{
osearch.Destination.SetData(value.Key, value.Value);
}
//Retransmit changes
nverb.Nodes.Add(update);
//Overlord going offline
if (!osearch.Destination.Online)
{
osearch.OnDisconnect -= uplink_OnDisconnect;
osearch.Kill();
//Remove associated external nodes
foreach (Node enode in externalNodes.ToList())
{
if (enode.OverlordID == osearch.Destination.OverlordID)
{
externalNodes.Remove(enode);
//Only signal disconnect is the node isnt a local node
//I.e. they connected locally without disconnecting externally.
ClientStream search =
connectedClientNodes.Where(n => n.Node.ID == enode.ID).
FirstOrDefault();
if (null == search)
{
//The node isn't connected locally, is it connected elsewhere externally?
Node bestExternal =
externalNodes.ToList().Where(n => n.ID == enode.ID).
OrderByDescending(n => n.LastUpdate).FirstOrDefault();
if (null != bestExternal)
{
//User has logged on elsewhere, update local clients of new details
nverb.Nodes.Add(bestExternal);
}
else
{
nverb.Nodes.Add(new Node {
ID = enode.ID, Online = false
});
}
}
}
}
}
}
else
{
logger.Trace("Server got update from external server about : {0}", update.ID);
//Check to see if the external node is connected locally, if so then dont retransmit changes but store changes under the relevant object
ClientStream localNode =
connectedClientNodes.Where(n => n.Node.ID == update.ID).FirstOrDefault();
//Update about an external node from an external overlord
Node search =
externalNodes.Where(n => n.ID == update.ID && n.OverlordID == req.OverlordID)
.FirstOrDefault();
if (null == search)
{
if (!string.IsNullOrEmpty(update.ID))
{
//New external node
search = new Node();
//Copy to local store
foreach (var value in update.Data)
{
search.SetData(value.Key, value.Value);
}
search.OverlordID = req.OverlordID;
externalNodes.Add(search);
//Dont retransmit external node as it is local
if (null == localNode)
{
nverb.Nodes.Add(update);
}
}
}
else
{
//Copy to local store
foreach (var value in update.Data)
{
search.SetData(value.Key, value.Value);
}
//Has the external node changed to a different overlord?
if (search.OverlordID != req.OverlordID)
{
search.OverlordID = req.OverlordID;
update.OverlordID = req.OverlordID;
}
//Dont retransmit external node as it is local
if (null == localNode)
{
//Retransmit changes
nverb.Nodes.Add(update);
}
}
}
}
}
}
//Only transmit external node info to local clients
if (nverb.Nodes.Count > 0)
{
NetworkRequest nreq = nverb.CreateRequest();
nreq.OverlordID = req.OverlordID;
SendToStandardClients(nreq);
}
SendResponse(e, null);
return(true);
}
}
}
catch
{
}
logger.Debug("Server received an invalid update");
SendError(e);
return(false);
}