/// <returns>null if no neighbors found for routing</returns>
public ConnectionToNeighbor RouteInviteRequest(LocalDrpPeer localDrpPeer, RoutedRequest routedRequest)
{
var req = routedRequest.InviteReq;
var logger = routedRequest.Logger;
ConnectionToNeighbor r = null;
RegistrationIdDistance minDistance = null;
var connectedNeighborsForRouting = localDrpPeer.GetConnectedNeighborsForRouting(routedRequest).ToList();
foreach (var connectedPeer in connectedNeighborsForRouting)
{
var distanceToConnectedPeer = req.ResponderRegistrationId.GetDistanceTo(_cryptoLibrary, connectedPeer.RemoteRegistrationId, NumberOfDimensions);
logger.WriteToLog_routing_detail($"distanceToConnectedPeer={distanceToConnectedPeer} from {req} to {connectedPeer}");
if (minDistance == null || minDistance.IsGreaterThan(distanceToConnectedPeer))
{
minDistance = distanceToConnectedPeer;
r = connectedPeer;
}
}
if (r == null)
{
logger.WriteToLog_routing_detail($"no neighbors found for routing");
}
return(r);
}
void RouteRegistrationRequest_LocalDrpPeerIteration(LocalDrpPeer localDrpPeer, RoutedRequest routedRequest,
ref double?maxP2pConnectionValue,
ref ConnectionToNeighbor proxyToDestinationPeer, ref LocalDrpPeer acceptAt)
{
var req = routedRequest.RegisterReq;
var connectedNeighborsForRouting = localDrpPeer.GetConnectedNeighborsForRouting(routedRequest).ToList();
var logger = routedRequest.Logger;
var distancesToNeighbors = new List <RegistrationIdDistance>();
var requestedDirectionMulResults = new List <double>();
int connectedNeighborsCountThatMatchReqFilters = 0;
foreach (var neighbor in connectedNeighborsForRouting)
{
if (req.MinimalDistanceToNeighbor != 0)
{
var distanceToNeighbor = req.RequesterRegistrationId.GetDistanceTo(_cryptoLibrary, neighbor.RemoteRegistrationId, NumberOfDimensions);
distancesToNeighbors.Add(distanceToNeighbor);
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"distanceToNeighbor={distanceToNeighbor} from REGISTER REQ {req.RequesterRegistrationId} to {neighbor} (req.min={req.MinimalDistanceToNeighbor})");
}
if (distanceToNeighbor.IsLessThan(req.MinimalDistanceToNeighbor))
{
// skip: this is too close than requested
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"skipping connection to {neighbor}: distance={distanceToNeighbor} is less than requested={req.MinimalDistanceToNeighbor}");
}
continue;
}
}
if (req.DirectionVectorNullable != null)
{
var requestedDirectionVector = req.DirectionVectorNullableD;
var vectorFromThisToNeighbor = RegistrationId.GetDifferenceVector(req.RequesterRegistrationId, neighbor.RemoteRegistrationId, CryptoLibrary, Configuration.SandboxModeOnly_NumberOfDimensions);
double mulResult = 0;
for (int i = 0; i < requestedDirectionVector.Length; i++)
{
mulResult += requestedDirectionVector[i] * requestedDirectionVector[i];
}
requestedDirectionMulResults.Add(mulResult);
if (mulResult < 0)
{
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"skipping connection to {neighbor}: direction from requester to neighbor does not match requested vector");
}
continue;
}
}
connectedNeighborsCountThatMatchReqFilters++;
var p2pConnectionValue_withNeighbor = P2pConnectionValueCalculator.GetMutualP2pConnectionValue(CryptoLibrary, req.RequesterRegistrationId, req.RequesterNeighborsBusySectorIds,
neighbor.RemoteRegistrationId, neighbor.RemoteNeighborsBusySectorIds ?? 0, NumberOfDimensions, false, false, false);
if (logger.WriteToLog_deepDetail_enabled)
{
logger.WriteToLog_deepDetail($"p2pConnectionValue_withNeighbor={p2pConnectionValue_withNeighbor} from REGISTER REQ {req.RequesterRegistrationId} to {neighbor}");
}
if (maxP2pConnectionValue == null || maxP2pConnectionValue < p2pConnectionValue_withNeighbor)
{
maxP2pConnectionValue = p2pConnectionValue_withNeighbor;
proxyToDestinationPeer = neighbor;
acceptAt = null;
}
}
if (connectedNeighborsCountThatMatchReqFilters == 0 && connectedNeighborsForRouting.Count != 0)
{
if (req.MinimalDistanceToNeighbor != 0)
{
// special case: we are inside the "minDistance" hypersphere: move away from the requester, proxy to most distant neighbor
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"special case: move away from the requester, proxy to most distant neighbor");
}
RegistrationIdDistance maxDistance = null;
for (int i = 0; i < connectedNeighborsForRouting.Count; i++)
{
var neighbor = connectedNeighborsForRouting[i];
var distanceToNeighbor = distancesToNeighbors[i];
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"distanceToConnectedPeer={distanceToNeighbor} from REGISTER REQ {req.RequesterRegistrationId} to {neighbor} (req.min={req.MinimalDistanceToNeighbor})");
}
if (maxDistance == null || distanceToNeighbor.IsGreaterThan(maxDistance))
{
maxDistance = distanceToNeighbor;
proxyToDestinationPeer = neighbor;
acceptAt = null;
}
}
}
if (req.DirectionVectorNullable != null)
{
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"special case: move towards the specified direction");
}
double?maxMulResult = null;
for (int i = 0; i < connectedNeighborsForRouting.Count; i++)
{
var neighbor = connectedNeighborsForRouting[i];
var mulResult = requestedDirectionMulResults[i];
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"mulResult={mulResult} for {neighbor}");
}
if (maxMulResult == null || mulResult > maxMulResult)
{
maxMulResult = mulResult;
proxyToDestinationPeer = neighbor;
acceptAt = null;
}
}
}
}
// dont connect to local peer if already connected
if (localDrpPeer.Configuration.LocalPeerRegistrationId.Equals(req.RequesterRegistrationId) == true)
{
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"not accepting request at local peer: it has same regID {req.RequesterRegistrationId}");
}
}
else if (localDrpPeer.ConnectedNeighbors.Any(x => x.RemoteRegistrationId.Equals(req.RequesterRegistrationId)) == true)
{
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"not accepting request at local peer: already connected to {req.RequesterRegistrationId}");
}
}
else if (localDrpPeer.ConnectedNeighbors.Count > localDrpPeer.Configuration.AbsoluteMaxNumberOfNeighbors)
{
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"not accepting request at local peer: already too many neighbors ({localDrpPeer.ConnectedNeighbors.Count})");
}
}
else
{
var p2pConnectionValue_withLocalPeer = P2pConnectionValueCalculator.GetMutualP2pConnectionValue(CryptoLibrary, req.RequesterRegistrationId, req.RequesterNeighborsBusySectorIds,
localDrpPeer.Configuration.LocalPeerRegistrationId, localDrpPeer.ConnectedNeighborsBusySectorIds, NumberOfDimensions, false, false, false);
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"p2pConnectionValue_withLocalPeer={p2pConnectionValue_withLocalPeer} from REGISTER REQ {req.RequesterRegistrationId} to {localDrpPeer.Configuration.LocalPeerRegistrationId}");
}
if (maxP2pConnectionValue == null || p2pConnectionValue_withLocalPeer > maxP2pConnectionValue)
{
maxP2pConnectionValue = p2pConnectionValue_withLocalPeer;
proxyToDestinationPeer = null;
acceptAt = localDrpPeer;
}
}
if (logger.WriteToLog_detail_enabled)
{
logger.WriteToLog_detail($"<< RouteRegistrationRequest_LocalDrpPeerIteration() proxyTo={proxyToDestinationPeer}, acceptAt={acceptAt}");
}
}