public bool UpdateLines(RoutingTable receivedTable, int metric)
{
var updated = false;
var receivedTableOwnLine = receivedTable.OwnLine();
var neighborLine = _routingTableLines.Find(x => x.Destination == receivedTableOwnLine.Destination);
var toChange = _routingTableLines.FindAll(x => x.Destination == receivedTableOwnLine.Destination);
if (receivedTableOwnLine.SequenceNumber > neighborLine.SequenceNumber)
{
foreach (var line in toChange)
{
var infoLine = receivedTable.RoutingTableLines.Find(x => x.Destination == line.Destination);
if (infoLine.SequenceNumber > line.SequenceNumber && line.NextHop == receivedTable.OwnLine().Destination)
{
if (infoLine.Metric + metric < line.Metric)
{
updated = true;
line.Update(receivedTableOwnLine.Destination, metric + infoLine.Metric, infoLine.SequenceNumber);
}
}
}
}
foreach (var line in _routingTableLines)
{
var infoLine = receivedTable.RoutingTableLines.Find(x => x.Destination == line.Destination);
if (infoLine != null && infoLine.SequenceNumber > line.SequenceNumber && infoLine.Metric + metric == line.Metric)
{
line.Update(line.NextHop, line.Metric, infoLine.SequenceNumber);
}
}
return(updated);
}
public void InstallTime(RoutingTable receivedTable, int time)
{
var lines = _routingTableLines.FindAll(x => x.NextHop == receivedTable.OwnLine().Destination);
foreach (var line in lines)
{
_ownRoutingTableLines[line] = time;
}
}
public void UpdateTable(RoutingTable receivedTable, int metric, int time, int updateSeconds)
{
InstallTime(receivedTable, time);
BrokenLink(receivedTable);
if (NewNeighbor(receivedTable, metric, time) || NewRouter(receivedTable, metric, time) || UpdateLines(receivedTable, metric))
{
OwnLine().SequenceNumber += 2;
}
_routingTableLines.Find(x => x.Destination == receivedTable.OwnLine().Destination).SequenceNumber = receivedTable.OwnLine().SequenceNumber;
}
public bool NewRouter(RoutingTable receivedTable, int metric, int time)
{
bool updated = false;
var infoLine = receivedTable.OwnLine();
var neighborLine = _routingTableLines.Find(x => x.Destination == receivedTable.OwnLine().Destination);
if (infoLine.SequenceNumber == neighborLine.SequenceNumber)
{
foreach (var line in receivedTable._routingTableLines)
{
if (!_routingTableLines.Exists(x => x.Destination == line.Destination) && !line.SequenceNumber.IsOdd())
{
AddLine(line.Destination, infoLine.Destination, metric + line.Metric, line.SequenceNumber, time);
updated = true;
}
}
}
if (infoLine.SequenceNumber > neighborLine.SequenceNumber)
{
foreach (var line in receivedTable._routingTableLines)
{
if (!_routingTableLines.Exists(x => x.Destination == line.Destination) && !line.SequenceNumber.IsOdd())
{
AddLine(line.Destination, infoLine.Destination, metric + line.Metric, line.SequenceNumber, time);
updated = true;
}
else
{
var toCheck = _routingTableLines.Find(x => x.Destination == line.Destination);
{
if (toCheck.Metric > line.Metric + metric)
{
toCheck.Update(infoLine.Destination, line.Metric + metric, line.SequenceNumber);
updated = true;
}
}
}
}
}
return(updated);
}
public bool NewNeighbor(RoutingTable receivedTable, int metric, int time)
{
var updated = false;
var infoLine = receivedTable.OwnLine();
if (!_routingTableLines.Exists(x => x.Destination == infoLine.Destination))
{
AddLine(infoLine.Destination, infoLine.Destination, metric, infoLine.SequenceNumber, time);
updated = true;
}
return(updated);
}
public void ChangeWeight(RoutingTable routingTable, int newWeight, string neighbor)
{
var neighborLine = routingTable.RoutingTableLines.Find(x => x.Destination == neighbor);
int oldWeight = neighborLine.Metric;
routingTable.OwnLine().SequenceNumber += 2;
neighborLine.SequenceNumber += 2;
var toChange = routingTable.RoutingTableLines.FindAll(x => x.NextHop == neighborLine.Destination);
foreach (var line in toChange)
{
line.Metric += newWeight - oldWeight;
}
}
public void BrokenLink(RoutingTable receivedTable)
{
var infoLine = receivedTable.OwnLine();
foreach (var line in receivedTable._routingTableLines)
{
if (line.SequenceNumber.IsOdd())
{
var toChange = _routingTableLines.Find(x => x.Destination == line.Destination && x.NextHop == infoLine.Destination);
if (toChange != null)
{
toChange.Update(line.NextHop, line.Metric, line.SequenceNumber);
}
}
}
}
