/*
* Implements the EdgeListener function to
* create edges of this type.
*/
public override void CreateEdgeTo(TransportAddress ta,
EdgeCreationCallback ecb)
{
if( !IsStarted )
{
// it should return null and not throw an exception
// for graceful disconnect and preventing others to
// connect to us after we've disconnected.
ecb(false, null, new EdgeException("Not started"));
return;
}
#if FUNCTION_DEBUG
foreach (TransportAddress local_ta in LocalTAs) {
Console.Error.WriteLine("Create edge local: {0} <-> remote {1}.", local_ta, ta);
}
#endif
if( ta.TransportAddressType != this.TAType ) {
//Can't make an edge of this type
#if FUNCTION_DEBUG
Console.Error.WriteLine("Can't make edge of this type.");
#endif
ecb(false, null, new EdgeException("Can't make edge of this type"));
return;
}
if( _ta_auth.Authorize(ta) == TAAuthorizer.Decision.Deny ) {
//Not authorized. Can't make this edge:
#if FUNCTION_DEBUG
Console.Error.WriteLine("Can't make edge. Remote TA {0} is not authorized locally.", ta);
#endif
ecb(false, null,
new EdgeException( ta.ToString() + " is not authorized") );
return;
}
int remote_id = ((IPTransportAddress) ta).Port;
//Get the edgelistener:
//Outbound edge:
FunctionEdge fe_l = new FunctionEdge(this, _listener_id,
remote_id, false);
lock( _listener_map ) {
FunctionEdgeListener remote
= (FunctionEdgeListener) _listener_map[remote_id];
if( remote != null ) {
//
// Make sure that the remote listener does not deny
// our TAs.
//
foreach (TransportAddress ta_local in LocalTAs) {
if (remote.TAAuth.Authorize(ta_local) == TAAuthorizer.Decision.Deny ) {
//Not authorized. Can't make this edge:
#if FUNCTION_DEBUG
Console.Error.WriteLine("Can't make edge. local TA {0} is not authorized remotely by {1}.", ta_local, ta);
#endif
ecb(false, null,
new EdgeException( ta_local.ToString() + " is not authorized by remote node.") );
return;
}
}
FunctionEdge fe_r = new FunctionEdge(remote, remote_id,
_listener_id, true);
fe_l.Partner = fe_r;
fe_r.Partner = fe_l;
remote.SendEdgeEvent(fe_r);
}
else {
//There is no other edge, for now, we use "udp-like"
//behavior of just making an edge that goes nowhere.
}
ecb(true, fe_l, null);
}
}
/**
* Implements the EdgeListener function to
* create edges of this type.
*/
public override void CreateEdgeTo(TransportAddress ta, EdgeCreationCallback ecb)
{
Edge e = null;
try {
if( !IsStarted )
{
throw new EdgeException("UdpEdgeListener is not started");
}
else if( ta.TransportAddressType != this.TAType ) {
throw new EdgeException(ta.TransportAddressType.ToString()
+ " is not my type: " + this.TAType.ToString() );
}
else if( _ta_auth.Authorize(ta) == TAAuthorizer.Decision.Deny ) {
//Too bad. Can't make this edge:
throw new EdgeException( ta.ToString() + " is not authorized");
}
else {
IPAddress first_ip = ((IPTransportAddress) ta).GetIPAddress();
IPEndPoint end = new IPEndPoint(first_ip, ((IPTransportAddress) ta).Port);
/* We have to keep our mapping of end point to edges up to date */
lock( _id_ht ) {
//Get a random ID for this edge:
int id;
do {
id = _rand.Next();
//Make sure we don't have negative ids
if( id < 0 ) { id = ~id; }
} while( _id_ht.Contains(id) || id == 0 );
e = new UdpEdge(this, false, end, _local_ep, id, 0);
_id_ht[id] = e;
}
NatDataPoint dp = new NewEdgePoint(DateTime.UtcNow, e);
Interlocked.Exchange<NatHistory>(ref _nat_hist, _nat_hist + dp);
Interlocked.Exchange<IEnumerable>(ref _nat_tas, new NatTAs( _tas, _nat_hist ));
/* Tell me when you close so I can clean up the table */
e.CloseEvent += this.CloseHandler;
ecb(true, e, null);
}
} catch(Exception ex) {
if( e != null ) {
//Clean up the edge
CloseHandler(e, null);
}
ecb(false, null, ex);
}
}
/* //////////////////////////////
*
* Here are all the normal methods of TcpEdgeListener
*
* //////////////////////////////
*/
public override void CreateEdgeTo(TransportAddress ta, EdgeCreationCallback ecb)
{
try {
if( !IsStarted ) {
throw new EdgeException("TcpEdgeListener is not started");
}
else if( ta.TransportAddressType != TransportAddress.TAType.Tcp ) {
throw new EdgeException(ta.TransportAddressType.ToString()
+ " is not my type: Tcp");
}
else if( _ta_auth.Authorize(ta) == TAAuthorizer.Decision.Deny ) {
//Too bad. Can't make this edge:
throw new EdgeException( ta.ToString() + " is not authorized");
}
else {
//Everything looks good:
ArrayList tmp_ips = new ArrayList();
tmp_ips.Add(((IPTransportAddress)ta).GetIPAddress());
CreationState cs = new CreationState(ecb,
new Queue( tmp_ips ),
((IPTransportAddress) ta).Port,
this);
ActionQueue.Enqueue(cs);
}
} catch(Exception e) {
ecb(false, null, e);
}
}
/*
* Implements the EdgeListener function to
* create edges of this type.
*/
public override void CreateEdgeTo(TransportAddress ta,
EdgeCreationCallback ecb)
{
if( !IsStarted )
{
// it should return null and not throw an exception
// for graceful disconnect and preventing others to
// connect to us after we've disconnected.
ecb(false, null, new EdgeException("Not started"));
return;
}
if( ta.TransportAddressType != this.TAType ) {
//Can't make an edge of this type
ecb(false, null, new EdgeException("Can't make edge of this type"));
return;
}
if( _ta_auth.Authorize(ta) == TAAuthorizer.Decision.Deny ) {
//Not authorized. Can't make this edge:
ecb(false, null, new EdgeException( ta.ToString() + " is not authorized") );
return;
}
int remote_id = ((SimulationTransportAddress) ta).ID;
//Get the edgelistener:
//Outbound edge:
int delay = 0;
if(_use_delay) {
if(LatencyMap != null) {
// id != 0, so we reduce all by 1
delay = LatencyMap[_listener_id][remote_id] / 1000;
} else {
lock(_sync) {
delay = _rand.Next(10, 250);
}
}
}
SimulationEdge se_l = new SimulationEdge(this, _listener_id, remote_id, false, delay);
AddEdge(se_l);
SimulationEdgeListener remote = (SimulationEdgeListener) _listener_map[remote_id];
if( remote != null ) {
//
// Make sure that the remote listener does not deny
// our TAs.
//
foreach (TransportAddress ta_local in LocalTAs) {
if (remote.TAAuth.Authorize(ta_local) == TAAuthorizer.Decision.Deny ) {
//Not authorized. Can't make this edge:
ecb(false, null, new EdgeException( ta_local.ToString() + " is not authorized by remote node.") );
return;
}
}
SimulationEdge se_r = new SimulationEdge(remote, remote_id, _listener_id, true, delay);
remote.AddEdge(se_r);
se_l.Partner = se_r;
se_r.Partner = se_l;
remote.SendEdgeEvent(se_r);
} else {
//There is no other edge, for now, we use "udp-like"
//behavior of just making an edge that goes nowhere.
}
ecb(true, se_l, null);
}
