private ProtocolStack GetManagementBranch()
{
ProtocolStackState managementBranchState = new ProtocolStackState();
managementBranchState.MiddleProtocols.Add(new TransportInfoProtocol()); // Transport Info
ProtocolStack managementBranch = new ProtocolStack();
managementBranch.SetState(managementBranchState);
managementBranchState.Type = DataProtocolType.Management;
return(managementBranch);
}
private ProtocolStack GetTextBranch()
{
// Text Branch
ProtocolStackState textBranchState = new ProtocolStackState();
textBranchState.MiddleProtocols.Add(new UTF8Protocol()); // UTF8
ProtocolStack textBranch = new ProtocolStack();
textBranch.SetState(textBranchState);
textBranchState.Type = DataProtocolType.Text;
return(textBranch);
}
private ProtocolStack GetFileBranch()
{
// File Branch
ProtocolStackState fileBranchState = new ProtocolStackState();
fileBranchState.MiddleProtocols.Add(new SmallFileProtocol()); // SmallFileProtocol
ProtocolStack fileBranch = new ProtocolStack();
fileBranch.SetState(fileBranchState);
fileBranchState.Type = DataProtocolType.SmallFile;
return(fileBranch);
}
private static void AddBasicSecurityLayer(ProtocolStackState stackState, AESProtocolState aesState)
{
// Heartbeat
stackState.MiddleProtocols.Add(new HeartbeatProtocol());
// Timestamp
stackState.MiddleProtocols.Add(new TimestampProtocol());
// Seq (this protocol will block broadcasted messages)
stackState.MiddleProtocols.Add(new SequenceProtocol());
// AES
AESProtocol aesP = new AESProtocol();
aesP.SetState((AESProtocolState)aesState.Clone());
stackState.MiddleProtocols.Add(aesP);
// Framing
stackState.MiddleProtocols.Add(new FramingProtocol());
}
private ProtocolStack GetBroadcastStack()
{
ProtocolStackState state = new ProtocolStackState();
// broadcast protocol
BroadcastProtocolState broadcaseState = new BroadcastProtocolState();
broadcaseState.SockController = _options.SockController;
broadcaseState.SockMgr = _options.SockMgr;
state.MiddleProtocols.Add(new BroadcastProtocol(broadcaseState));
// Disconnect when dataContent invalid and report
state.MiddleProtocols.Add(new DisconnectProtocol());
AddBasicSecurityLayer(state, _options.FirstLowAESProtocolState);
ProtocolStack protocolStack = new ProtocolStack();
protocolStack.SetState(state);
return(protocolStack);
}
private ProtocolStack GetDefaultStack()
{
ProtocolStackState state = new ProtocolStackState();
// branching
List <ProtocolStack> branches = new List <ProtocolStack>();
branches.Add(GetTextBranch()); // index 0
branches.Add(GetFileBranch()); // index 1
branches.Add(GetManagementBranch()); // index 2
TypeBranchingProtocol branchingProtocol = new TypeBranchingProtocol();
branchingProtocol.SetBranches(branches);
state.MiddleProtocols.Add(branchingProtocol);
// Block invalid DataContent
state.MiddleProtocols.Add(new BlockProtocol());
// Type tagging
TypeTagProtocol typeTagProtocol = new TypeTagProtocol();
state.MiddleProtocols.Add(typeTagProtocol);
// Block invalid DataContent
state.MiddleProtocols.Add(new BlockProtocol());
// AES
AESProtocol aesP = new AESProtocol();
aesP.SetState((AESProtocolState)_options.SecondLowAESProtocolState.Clone());
state.MiddleProtocols.Add(aesP);
// Block invalid data and report
state.MiddleProtocols.Add(new BlockProtocol());
// Basic Security Layers
AddBasicSecurityLayer(state, _options.FirstLowAESProtocolState);
state.Type = DataProtocolType.Text;
ProtocolStack protocolStack = new ProtocolStack();
protocolStack.SetState(state);
return(protocolStack);
}
public void FromLowLayerToHere(DataContent dataContent)
{
// block invalid dataContent
if (dataContent.Data == null)
{
return;
}
// server start broadcasting
foreach (SockMgr client in _state.SockController.GetSockList().Clients)
{
// don't re-sent to source
if (client == _state.SockMgr)
{
continue;
}
// find the same class from other peer sockets and activate them
ProtocolStackState peerStackState = client.GetProtocolStack().GetState();
if (typeof(BroadcastProtocol) == peerStackState.MiddleProtocols[0]?.GetType())
{
peerStackState.MiddleProtocols[0].FromHighLayerToHere((SocketApp.Protocol.DataContent)dataContent.Clone());
}
}
}
// setup Event chains
public void SetState(ProtocolStackState state)
{
UnlinkMiddleProtocols();
_state = state;
LinkMiddleProtocols();
}