public bool ConnectivityChanged(LSP old)
{
if (old == null)
{
return(true);
}
foreach (var item in this.Links)
{
int val;
bool exists = old.Links.TryGetValue(item.Key, out val);
if (!exists || val != item.Value)
{
return(false);
}
}
foreach (var item in old.Links)
{
int val;
bool exists = this.Links.TryGetValue(item.Key, out val);
if (!exists || val != item.Value)
{
return(false);
}
}
return(true);
}
public void OriginatePackage()
{
if (!started)
{
return;
}
Console.WriteLine($"Router {routerId} has originated a package.");
foreach (var item in Connections)
{
item.TickCount++;
if (item.TickCount > 1)
{
item.Maxed = true;
}
}
Dictionary <int, int> links = new Dictionary <int, int>();
foreach (var item in Connections)
{
links.Add(item.Router.routerId, item.Cost);
}
LSP lsp = new LSP(routerId, ++sequenceId, links);
replaceLSDB(lsp);
ConstructRoutingTable();
foreach (var item in Connections)
{
item.Router.ReceivePackage(lsp);
}
}
public void ReceivePackage(LSP newLSP)
{
if (!started)
{
return;
}
newLSP.TTL--;
foreach (var item in Connections)
{
if (item.Router.routerId == newLSP.SourceId)
{
item.TickCount = 0;
item.Maxed = false;
}
}
LSP oldLSP;
LSDB.TryGetValue(newLSP.SourceId, out oldLSP);
if (newLSP.TTL > 0 && newLSP.Newer(oldLSP))
{
replaceLSDB(newLSP);
if (newLSP.ConnectivityChanged(oldLSP))
{
ConstructRoutingTable();
}
foreach (var item in Connections)
{
item.Router.ReceivePackage(newLSP);
}
}
}
public bool Newer(LSP old)
{
if (old == null || this.SequenceId > old.SequenceId)
{
return(true);
}
return(false);
}
private void replaceLSDB(LSP newLSP)
{
LSDB[newLSP.SourceId] = newLSP;
}