public static void Send_ResetWave()
{
// If in a reset wave already, return.
if (RoutingGlobal._color == Color.Red)
{
return;
}
// Refresh children table
_children.CleanseChildrenTable();
if (!_children.IsEmpty())
{
RoutingGlobal._color = Color.Red;
var msgBytes = new byte[3];
var size = ComposeMessages.CreateResetMessage(msgBytes, (ushort)_resetMsgNum);
MulticastToChildren(msgBytes, size);
_distResetTimer.Change(120000, Timeout.Infinite); // 2 min timer. TODO: Make timeout interval contingent on distance from the reset wave origin
}
else
{
// Create status query to existing candidates
var msgBytes = new byte[3];
var size = ComposeMessages.CreateStatusQueryMessage(msgBytes, (ushort)_statusMsgNum);
// Multicast query to candidates
if (MulticastToCandidates(msgBytes, size)) // If there are candidates
{
// Wait for response
_statusResponseTimer.Change(10000, Timeout.Infinite); // 10 second timer
// Reset candidate table
ushort[] neighbors = MACBase.NeighborListArray();
CandidateTable.Initialize((byte)neighbors.Length);
}
else //Empty candidate table; set parent immediately
{
// Set best node in candidate table as parent
RoutingGlobal.SetParent(false);
// Reset params
RoutingGlobal._color = Color.Green;
// Send "Add Parent" message to new parent
DistributedReset.Send_AddParent();
_statusMsgNum++;
_resetMsgNum++;
}
}
}
private static void Status_Response(object state)
{
#if DBG_VERBOSE
Debug.Print("*** STATUS TIMEOUT FIRED: query# " + _statusMsgNum + "; setting new parent ***");
#elif DBG_SIMPLE
Debug.Print("Setting new parent after status query#" + _statusMsgNum);
#endif
// Try to switch to a new parent
// Check if candidate table has valid entries
RoutingGlobal.CleanseCandidateTable(_distResetPipe);
// Set best node in candidate table as parent
RoutingGlobal.SetParent(false);
// Reset params
RoutingGlobal._color = Color.Green;
// Send "Add Parent" message to new parent
DistributedReset.Send_AddParent();
_statusMsgNum++;
}
private static void Reset_State(object state)
{
#if DBG_VERBOSE
Debug.Print("*** RESET WAVE TIMEOUT FIRED: Initiating completion wave# " + _resetMsgNum + " ***");
#elif DBG_SIMPLE
Debug.Print("Initiating completion wave " + _resetMsgNum + "");
#endif
Send_CompletionWave(_resetMsgNum);
// Purge children table
_children = new ChildrenList();
_completionMsgs = null;
// Create status query to existing candidates
var msgBytes = new byte[3];
var size = ComposeMessages.CreateStatusQueryMessage(msgBytes, (ushort)_statusMsgNum);
// Multicast query to candidates
if (MulticastToCandidates(msgBytes, size)) // If there are candidates
{
// Wait for response
_statusResponseTimer.Change(10000, Timeout.Infinite); // 10 second timer
// Reset candidate table
ushort[] neighbors = MACBase.NeighborListArray();
CandidateTable.Initialize((byte)neighbors.Length);
}
else //Empty candidate table; set parent immediately
{
// Set best node in candidate table as parent
RoutingGlobal.SetParent(false);
// Reset params
RoutingGlobal._color = Color.Green;
// Send "Add Parent" message to new parent
DistributedReset.Send_AddParent();
_statusMsgNum++;
}
_resetMsgNum++; // No more completion messages to be accepted beyond this point
}
private static void DistResetStreamReceive(IMAC macBase, DateTime time, Packet packet)
{
#if DBG_VERBOSE
DebuggingSupport.PrintMessageReceived(macBase, "Distributed Reset");
#endif
if (packet == null)
{
return;
}
#if !DBG_LOGIC
Debug.Print("\tRSSI: " + packet.RSSI + ", from " + packet.Src);
#endif
var rcvPayloadBytes = packet.Payload;
//var payload = new string(Encoding.UTF8.GetChars(rcvPayloadBytes));
#if DBG_VERBOSE
SystemGlobal.PrintNumericVals("\tDistributed reset Rcv: ", rcvPayloadBytes);
#endif
try
{
ushort[] neighbors = MACBase.NeighborListArray();
var neighborStatus = _distResetPipe.NeighborStatus(packet.Src);
if (neighborStatus == null)
{
#if DBG_VERBOSE
Debug.Print("\t\t!!!!!!!!!!!!!!!!! Node " + packet.Src + " is not a Neighbor (MACBase.NeighborStatus returned null)");
#elif DBG_SIMPLE
Debug.Print("Sender not a neighbor.");
#endif
// If node in children table, drop it
if (Array.IndexOf(_children._childrenList, packet.Src) < -1)
{
_children.DropChild(packet.Src);
}
return;
}
//Debug.Print("\t\tFwd avg RSSI: " + neighborStatus.ReceiveLink.AverageRSSI + ", Rev avg RSSI: " + neighborStatus.SendLink.AverageRSSI);
switch ((MessageIds)rcvPayloadBytes[0])
{
case MessageIds.AddParent:
#if !DBG_LOGIC
Debug.Print("\t>>> AddParent");
#endif
if (_children.AddChild(packet.Src))
{
#if DBG_VERBOSE
Debug.Print("+++ Added new child: " + packet.Src + " +++");
#elif DBG_SIMPLE
Debug.Print("Added new child: " + packet.Src);
#endif
}
else
{
#if DBG_VERBOSE
Debug.Print("@@@ Child already exists: " + packet.Src + " @@@");
#endif
}
return;
case MessageIds.DropParent:
#if !DBG_LOGIC
Debug.Print("\t>>> DropParent");
#endif
if (_children.DropChild(packet.Src))
{
#if DBG_VERBOSE
Debug.Print("--- Dropped child: " + packet.Src + " ---");
#elif DBG_SIMPLE
Debug.Print("Dropped child: " + packet.Src);
#endif
}
else
{
#if DBG_VERBOSE
Debug.Print("@@@ Child does not exist: " + packet.Src + " @@@");
#endif
}
return;
case MessageIds.Reset:
#if !DBG_LOGIC
Debug.Print("\t>>> ResetWave");
#endif
// Decode round number
ushort round_num;
ParseMessages.ParseResetMessage(rcvPayloadBytes, out round_num);
// Is this a legit reset wave?
if (RoutingGlobal._color == Color.Red || packet.Src != RoutingGlobal.Parent || round_num != _resetMsgNum)
{
#if DBG_VERBOSE
Debug.Print("!!! ILLEGAL RESET WAVE# " + round_num + ": Received from: " + packet.Src + " !!!");
#elif DBG_SIMPLE
Debug.Print("Illegal reset wave " + round_num + " from " + packet.Src);
#endif
return;
}
// Refresh children table
_children.CleanseChildrenTable();
if (_children.IsEmpty()) // Start completion wave if leaf node
{
#if DBG_VERBOSE
Debug.Print("*** LEAF NODE REACHED: Initiating completion wave# " + round_num + " ***");
#elif DBG_SIMPLE
Debug.Print("At leaf; initiating completion wave " + round_num);
#endif
Send_CompletionWave(round_num);
// Create status query to existing candidates
var msgBytes = new byte[3];
var size = ComposeMessages.CreateStatusQueryMessage(msgBytes, (ushort)_statusMsgNum);
// Multicast query to candidates
if (MulticastToCandidates(msgBytes, size)) // If there are candidates
{
// Wait for response
_statusResponseTimer.Change(10000, Timeout.Infinite); // 10 second timer
// Reset candidate table
CandidateTable.Initialize((byte)neighbors.Length);
}
else //Empty candidate table; set parent immediately
{
// Set best node in candidate table as parent
RoutingGlobal.SetParent(false);
// Reset params
RoutingGlobal._color = Color.Green;
// Send "Add Parent" message to new parent
DistributedReset.Send_AddParent();
_statusMsgNum++;
}
_resetMsgNum++;
}
else
{
// Forward reset wave to own children
Send_ResetWave(rcvPayloadBytes);
}
return;
case MessageIds.Completion:
#if !DBG_LOGIC
Debug.Print("\t>>> CompletionWave");
#endif
// Decode round number
ushort round;
ParseMessages.ParseCompletionMessage(rcvPayloadBytes, out round);
// Is this a legit completion wave?
int pos = Array.IndexOf(_children._childrenList, packet.Src);
if (RoutingGlobal._color != Color.Red || pos == -1 || round != _resetMsgNum)
{
#if DBG_VERBOSE
Debug.Print("!!! ILLEGAL COMPLETION WAVE# " + round + ": Received from: " + packet.Src + " !!!");
#elif DBG_SIMPLE
Debug.Print("Illegal completion wave " + round + " from " + packet.Src);
#endif
return;
}
_completionMsgs[pos] = true;
// Forward completion wave if received from all children
for (int i = 0; i < _completionMsgs.Length; i++)
{
if (!_completionMsgs[i]) // If not received from any child, return
{
return;
}
}
// Else, forward completion wave to parent
#if DBG_VERBOSE
Debug.Print("*** RECEIVED COMPLETION MESSAGES FROM ALL CHILDREN: initiating completion wave# " + round + " ***");
#elif DBG_SIMPLE
Debug.Print("All children responded; initiating completion wave " + round);
#endif
Send_CompletionWave(round);
// Purge children table
_children = new ChildrenList();
_completionMsgs = null;
_distResetTimer.Change(Timeout.Infinite, Timeout.Infinite);
// Create status query to existing candidates
var msgBytes1 = new byte[3];
var size1 = ComposeMessages.CreateStatusQueryMessage(msgBytes1, (ushort)_statusMsgNum);
// Multicast query to candidates
if (MulticastToCandidates(msgBytes1, size1)) // If there are candidates
{
// Wait for response
_statusResponseTimer.Change(10000, Timeout.Infinite); // 10 second timer
// Reset candidate table
CandidateTable.Initialize((byte)neighbors.Length);
}
else //Empty candidate table; set parent immediately
{
// Set best node in candidate table as parent
RoutingGlobal.SetParent(false);
// Reset params
RoutingGlobal._color = Color.Green;
// Send "Add Parent" message to new parent
DistributedReset.Send_AddParent();
_statusMsgNum++;
}
_resetMsgNum++;
return;
case MessageIds.StatusQuery:
#if !DBG_LOGIC
Debug.Print("\t>>> StatusQuery");
#endif
//If in a reset wave or no valid path, don't bother responding
if (RoutingGlobal._color == Color.Red || RoutingGlobal.BestEtx >= RoutingGlobal.Infinity)
{
#if DBG_VERBOSE
Debug.Print("!!! Not responding. Color: " + RoutingGlobal._color + ", BestEtx: " + RoutingGlobal.BestEtx + " !!!");
#elif DBG_SIMPLE
Debug.Print("Not responding. Color: " + RoutingGlobal._color + ", BestEtx: " + RoutingGlobal.BestEtx);
#endif
return;
}
// Decode round number
ushort status_msgnum;
ParseMessages.ParseStatusQueryMessage(rcvPayloadBytes, out status_msgnum);
// Send status response
var msgBytes2 = new byte[5];
var size2 = ComposeMessages.CreateStatusResponseMessage(msgBytes2, status_msgnum);
NetOpStatus status = _distResetPipe.Send(RoutingGlobal.Parent, msgBytes2, 0, (ushort)size2);
return;
case MessageIds.StatusResponse:
#if !DBG_LOGIC
Debug.Print("\t>>> StatusResponse");
#endif
ushort status_respnum;
Color col;
byte etx;
byte pathEWRNP_B2N;
// Decode message
ParseMessages.ParseStatusResponseMessage(rcvPayloadBytes, out col, out etx, out status_respnum, out pathEWRNP_B2N);
// Is this a valid response?
if (status_respnum != _statusMsgNum)
{
#if DBG_VERBOSE
Debug.Print("!!! ILLEGAL STATUS RESPONSE# " + status_respnum + ": Received from: " + packet.Src + " !!!");
#elif DBG_SIMPLE
Debug.Print("Illegal status response " + status_respnum + " from " + packet.Src);
#endif
return;
}
byte tempEtx = (byte)(etx + 1);
// Add candidate if its offered etx exceeds _minEtx
if (tempEtx >= RoutingGlobal._minEtx)
{
CandidateTable.AddCandidate(packet.Src, 0, tempEtx, pathEWRNP_B2N, RoutingGlobal.MaxEtx); // TODO: Add RSSI later
#if DBG_VERBOSE
Debug.Print("+++ Added new candidate: " + packet.Src + "; path length: " + tempEtx + " +++");
#elif DBG_SIMPLE
Debug.Print("New candidate " + packet.Src + ":[" + tempEtx + "]");
#endif
}
else
{
#if DBG_VERBOSE
Debug.Print("--- Not a candidate: " + packet.Src + "; path length: " + tempEtx + " ---");
#elif DBG_SIMPLE
Debug.Print("Not a candidate " + packet.Src + ":[" + tempEtx + "]");
#endif
}
return;
default:
#if !DBG_LOGIC
Debug.Print("\tUnknown message received <" + rcvPayloadBytes[0] + ">");
#endif
break;
}
}
catch (Exception e) { Debug.Print(e.StackTrace); }
}