private void SendGatewayInformationResponse(PUP p)
{
//
// Pup Type: 201 (octal)
// Pup ID: same as in Request Pup
// Pup Contents: one or more groups of four bytes, each providing routing information for
// one network, as follows:
//
// <target-net> <gateway-net> <gateway-host> <hop-count>
//
// In each group, the first byte specifies the target network number. If the gateway host is
// directly connected to that network, then the <hop-count> is zero and the <gateway-net> and
// <gateway-host> describe the gateway’s connection to the network.
// If the gateway host is not directly connected to the target network, then the second and
// third bytes give the network and host numbers of another gateway through which the
// responding gateway routes Pups to that network, and the fourth byte gives the hop count,
// i.e., the number of additional gateways (not including itself) through which the responding
// gateway believes a Pup must pass to reach the specified network. A hop count greater than
// the constant maxHops (presently 15) signifies that the target network is believed to be
// inaccessible.
//
byte[] infoArray = GetGatewayInformationArray();
PUPPort localPort = new PUPPort(DirectoryServices.Instance.LocalHostAddress, p.DestinationPort.Socket);
// Response must contain our network number; this is used to tell clients what network they're on if they don't already know.
PUPPort remotePort = new PUPPort(DirectoryServices.Instance.LocalNetwork, p.SourcePort.Host, p.SourcePort.Socket);
PUP response = new PUP(PupType.GatewayInformationResponse, p.ID, remotePort, localPort, infoArray);
Router.Instance.SendPup(response);
}
/// <summary>
/// Called when a PUP comes in on a known socket. Establishes a new BSP channel.
/// A worker of the appropriate type is woken up to service the channel.
/// </summary>
/// <param name="p"></param>
public static void EstablishRendezvous(PUP p, Type workerType)
{
if (p.Type != PupType.RFC)
{
Log.Write(LogType.Error, LogComponent.RTP, "Expected RFC pup, got {0}", p.Type);
return;
}
UInt32 socketID = SocketIDGenerator.GetNextSocketID();
Log.Write(LogType.Error, LogComponent.Exp, "setting up rendezvous on {0} {1} with socketID {2}", p.DestinationPort, p.SourcePort, socketID);
BSPChannel newChannel = new BSPChannel(p, socketID);
newChannel.OnDestroy += OnChannelDestroyed;
_activeChannels.Add(socketID, newChannel);
//
// Initialize the worker for this channel.
InitializeWorkerForChannel(newChannel, workerType);
// Send RFC response to complete the rendezvous:
// Modify the destination port to specify our network
PUPPort sourcePort = p.DestinationPort;
sourcePort.Network = DirectoryServices.Instance.LocalNetwork;
PUP rfcResponse = new PUP(PupType.RFC, p.ID, newChannel.ClientPort, sourcePort, newChannel.ServerPort.ToArray());
Log.Write(LogComponent.RTP,
"Establishing Rendezvous, ID {0}, Server port {1}, Client port {2}.",
p.ID, newChannel.ServerPort, newChannel.ClientPort);
Router.Instance.SendPup(rfcResponse);
}
/// <summary>
/// Routes a locally received PUP to the proper destination host.
/// </summary>
/// <param name="pup"></param>
public void RouteIncomingLocalPacket(PUP pup, bool route)
{
//
// Check the network -- if it specifies network zero (coming from a host that doesn't yet know what
// network it's on, or specifying the current network) or our network
// we will pass it on to the protocol suite.
//
if (pup.DestinationPort.Network == 0 || pup.DestinationPort.Network == DirectoryServices.Instance.LocalHostAddress.Network)
{
Log.Write(LogType.Verbose, LogComponent.PUP, "Routing incoming packet.");
_localProtocolDispatcher.ReceivePUP(pup);
}
else if (route)
{
//
// Not for our network -- see if we know where to route it.
//
RoutePacketExternally(pup);
}
else
{
//
// Not local, and we were asked not to route this PUP, so drop it on the floor.
//
}
}
private void RouteIncomingExternalPacket(PUP p)
{
//
// Ensure that this is for our network; otherwise this has been misrouted.
// (Since we don't do multi-hop routing, any packet coming in through a gateway
// interface must be destined for us.)
//
if (p.DestinationPort.Network == DirectoryServices.Instance.LocalNetwork)
{
//
// Send it out on the local network for anyone to see.
//
_pupPacketInterface.Send(p);
//
// And if it's intended for us (the IFS server) let our services have a crack at it, too.
//
if (p.DestinationPort.Host == DirectoryServices.Instance.LocalHostAddress.Host || // us specifically
p.DestinationPort.Host == 0) // broadcast
{
_localProtocolDispatcher.ReceivePUP(p);
}
}
else
{
//
// This was misrouted. Log it and drop.
//
Log.Write(LogType.Error,
LogComponent.Routing,
"PUP was misrouted; intended for network {0}, host {1}",
p.DestinationPort.Network,
p.DestinationPort.Host);
}
}
public void Send(PUP p)
{
//
// Write PUP to UDP:
//
// For now, no actual routing (Gateway not implemented yet), everything is on the same 'net.
// Just send a broadcast UDP with the encapsulated frame inside of it.
//
// Build the outgoing data; this is:
// 1st word: length of data following
// 2nd word: 3mbit destination / source bytes
// 3rd word: frame type (PUP)
byte[] encapsulatedFrame = new byte[6 + p.RawData.Length];
// 3mbit Packet length
encapsulatedFrame[0] = (byte)((p.RawData.Length / 2 + 2) >> 8);
encapsulatedFrame[1] = (byte)(p.RawData.Length / 2 + 2);
// addressing
encapsulatedFrame[2] = p.DestinationPort.Host;
encapsulatedFrame[3] = p.SourcePort.Host;
// frame type
encapsulatedFrame[4] = (byte)(_pupFrameType >> 8);
encapsulatedFrame[5] = (byte)_pupFrameType;
// Actual data
p.RawData.CopyTo(encapsulatedFrame, 6);
// Send as UDP broadcast.
_udpClient.Send(encapsulatedFrame, encapsulatedFrame.Length, _broadcastEndpoint);
}
/// <summary>
/// Pings the client with an empty AData PUP, which will cause it to respond with an ACK containing client BSP information.
/// </summary>
private void RequestClientStats()
{
//
// Send an empty AData PUP to keep the connection alive and to update the client data stats.
//
PUP aData = new PUP(PupType.AData, _sendPos, _clientConnectionPort, _serverConnectionPort, new byte[0]);
Router.Instance.SendPup(aData);
}
/// <summary>
/// Finds the appropriate channel for the given PUP.
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
private static BSPChannel FindChannelForPup(PUP p)
{
if (_activeChannels.ContainsKey(p.DestinationPort.Socket))
{
return(_activeChannels[p.DestinationPort.Socket]);
}
else
{
return(null);
}
}
/// <summary>
/// Sends a Mark (or AMark) to the client.
/// </summary>
/// <param name="markType"></param>
/// <param name="ack"></param>
public void SendMark(byte markType, bool ack)
{
if (_destroyed)
{
return;
}
PUP markPup = new PUP(ack ? PupType.AMark : PupType.Mark, _sendPos, _clientConnectionPort, _serverConnectionPort, new byte[] { markType });
// Send it.
SendDataPup(markPup);
}
/// <summary>
/// Handles an End request from the client.
/// </summary>
/// <param name="p"></param>
public void End(PUP p)
{
PUP endReplyPup = new PUP(PupType.EndReply, p.ID, _clientConnectionPort, _serverConnectionPort, new byte[0]);
Router.Instance.SendPup(endReplyPup);
// "The receiver of the End PUP responds by returning an EndReply Pup with matching ID and then
// _dallying_ up to some reasonably long timeout interval (say, 10 seconds) in order to respond to
// a retransmitted End Pup should its initial EndReply be lost. If and when the dallying end of the
// stream connection receives its EndReply, it may immediately self destruct."
// TODO: actually make this happen...
}
private void ReceiveCallback(Packet p)
{
//
// Filter out encapsulated 3mbit frames and look for PUPs, forward them on.
//
if ((int)p.Ethernet.EtherType == _3mbitFrameType)
{
Log.Write(LogType.Verbose, LogComponent.Ethernet, "3mbit pup received.");
MemoryStream packetStream = p.Ethernet.Payload.ToMemoryStream();
// Read the length prefix (in words), convert to bytes.
// Subtract off 2 words for the ethernet header
int length = ((packetStream.ReadByte() << 8) | (packetStream.ReadByte())) * 2 - 4;
// Read the address (1st word of 3mbit packet)
byte destination = (byte)packetStream.ReadByte();
byte source = (byte)packetStream.ReadByte();
// Read the type and switch on it
int etherType3mbit = ((packetStream.ReadByte() << 8) | (packetStream.ReadByte()));
//
// Ensure this is a packet we're interested in.
//
if (etherType3mbit == _pupFrameType && // it's a PUP
(destination == DirectoryServices.Instance.LocalHost || // for us, or...
destination == 0)) // broadcast
{
try
{
PUP pup = new PUP(packetStream, length);
_routerCallback(pup, destination != 0);
}
catch (Exception e)
{
// An error occurred, log it.
Log.Write(LogType.Error, LogComponent.PUP, "Error handling PUP: {0} {1}\n\n{2}", e.Message, e.StackTrace, e.InnerException);
}
}
else
{
Log.Write(LogType.Warning, LogComponent.Ethernet, "3mbit packet is not a PUP, dropping");
}
}
else
{
// Not a PUP, Discard the packet. We will not log this, so as to keep noise down.
//Log.Write(LogLevel.DroppedPacket, "Not a PUP. Dropping.");
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!PUP.IsMode("e"))
{
PUP.IncludeJQuery = true;
}
if (!PUP.IsMode("aep"))
{
//StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>body {background-position: center top; background-image: url(/dreamstudio/images/bkgd/DarkSkyBkgd.jpg); text-align:center; margin:0 auto;}</style>"));
StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>#MasterAll{background:#fff;height:auto;width:100%;min-width:750px;max-width:950px;text-align:left;margin: 0 auto;}</style>"));
StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>#ContentArea{margin-left: 24px; margin-right: 20px;}</style>"));
}
else
{
//TopNavigationPanel.Visible = false;
SearchPanel.Visible = false;
}
if (PUP.IsMode("a"))
{
StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>body {text-align:left; margin:0 auto;}</style>"));
StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>#ContentArea{margin-left: 0px; margin-right: 0px;}</style>"));
StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>.contentArea{margin-left: 0px; margin-right: 0px;}</style>"));
StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>#MasterAll{background:#fff;height:auto;width:100%;min-width:180px;max-width:950px;text-align:left;margin: 0 auto;}</style>"));
}
if (PUP.IsMode("ae"))
{
StyleOverridePH.Controls.Add(new LiteralControl("<style type='text/css'>body {line-height: 1em; } .contentBox { margin-top: 80px; } .masterMessageArea { background-color:#fff; }</style>"));
SearchPanel.Visible = false;
//FooterPanel.Visible = false;
}
if (PUP.IsMode("ae"))
{
HeaderPanel.Visible = false;
}
//HomeHL.NavigateUrl = PUP.GetLink("/core/item/page.aspx", 56809);
//ArtworkHL.NavigateUrl = PUP.GetLink("/core/item/page.aspx", 56810);
//AboutHL.NavigateUrl = PUP.GetLink("/core/item/page.aspx", 56819);
//ContactHL.NavigateUrl = PUP.GetLink("/core/item/page.aspx", 56820);
if (PUP.IContains(PUP.Host, "dynamicspd.com"))
{
CopyrightHL.NavigateUrl = "http://DynamicsPD.com";
CopyrightHL.Text = "© " + DateTime.Now.Year.ToString() + " Patrol Dynamics - Community Policing System";
}
else if (PUP.ItemID != 94009) // The Old Explorer
{
CopyrightHL.NavigateUrl = "http://DreamStudio.com";
CopyrightHL.Text = "© " + DateTime.Now.Year.ToString() + " dreamstudio";
}
CopyrightHL.CssClass = "tinytext";
}
private void RoutePacketExternally(PUP p)
{
RoutingTableEntry destinationNetworkEntry = _routingTable.GetAddressForNetworkNumber(p.DestinationPort.Network);
if (destinationNetworkEntry != null)
{
//
// Send this out through the external network interface.
//
if (_gatewayUdpClient != null)
{
Log.Write(LogType.Verbose,
LogComponent.Routing,
"-> PUP routed to {0}:{1}, type {2} source {3} destination {4}.",
destinationNetworkEntry.HostAddress,
destinationNetworkEntry.Port,
p.Type,
p.SourcePort,
p.DestinationPort);
try
{
_gatewayUdpClientLock.EnterWriteLock();
_gatewayUdpClient.Send(p.RawData, p.RawData.Length, destinationNetworkEntry.HostAddress, destinationNetworkEntry.Port);
}
catch (Exception e)
{
Log.Write(LogType.Error,
LogComponent.Routing,
"Gateway UDP client send failed, error {0}. Continuing.",
e.Message);
}
finally
{
_gatewayUdpClientLock.ExitWriteLock();
}
}
}
else
{
//
// We don't know where to send this, drop it instead.
//
Log.Write(
LogType.Verbose,
LogComponent.Routing,
"Outgoing PUP is for unknown network {0}, dropping.", p.DestinationPort.Network);
}
}
/// <summary>
/// Sends an Abort PUP to the client, (generally indicating a catastrophic failure of some sort.)
/// </summary>
/// <param name="message"></param>
public void SendAbort(string message)
{
if (_destroyed)
{
return;
}
PUP abortPup = new PUP(PupType.Abort, _startPos, _clientConnectionPort, _serverConnectionPort, Helpers.StringToArray(message));
//
// Send this directly, do not wait for the client to be ready (since it may be wedged, and we don't expect anyone to actually notice
// this anyway).
//
Router.Instance.SendPup(abortPup);
}
/// <summary>
/// Sends a PUP. Will block if client is unable to receive data. If timeouts expire, channel will be shut down.
/// </summary>
/// <param name="p"></param>
private void SendDataPup(PUP p)
{
//
// Sanity check: This should only be called for Data or Mark pups.
//
if (p.Type != PupType.AData && p.Type != PupType.Data && p.Type != PupType.Mark && p.Type != PupType.AMark)
{
throw new InvalidOperationException("Invalid PUP type for SendDataPup.");
}
//
// Add the pup to the output window. This may block if the window is full.
//
AddPupToOutputWindow(p);
}
public void SendEnd()
{
PUP endPup = new PUP(PupType.EFTPEnd, _sendPos, _clientConnectionPort, _serverConnectionPort, new byte[0]);
Router.Instance.SendPup(endPup);
// Await an ack
_outputAckEvent.WaitOne(EFTPAckTimeoutPeriod);
_sendPos++;
// Send another end to close things off.
endPup = new PUP(PupType.EFTPEnd, _sendPos, _clientConnectionPort, _serverConnectionPort, new byte[0]);
Router.Instance.SendPup(endPup);
}
/// <summary>
/// Sends an ACK to the client.
/// </summary>
private void SendAck()
{
_inputLock.EnterReadLock();
BSPAck ack = new BSPAck();
ack.MaxBytes = MaxBytes;
ack.MaxPups = MaxPups;
ack.BytesSent = MaxBytes;
_inputLock.ExitReadLock();
PUP ackPup = new PUP(PupType.Ack, _recvPos, _clientConnectionPort, _serverConnectionPort, Serializer.Serialize(ack));
Router.Instance.SendPup(ackPup);
Log.Write(LogType.Verbose, LogComponent.BSP, "ACK sent.");
}
public void Send(PUP p)
{
//
// Write PUP to ethernet:
//
// Build the outgoing data; this is:
// 1st word: length of data following
// 2nd word: 3mbit destination / source bytes
// 3rd word: frame type (PUP)
byte[] encapsulatedFrame = new byte[6 + p.RawData.Length];
// 3mbit Packet length
encapsulatedFrame[0] = (byte)((p.RawData.Length / 2 + 2) >> 8);
encapsulatedFrame[1] = (byte)(p.RawData.Length / 2 + 2);
// addressing
encapsulatedFrame[2] = p.DestinationPort.Host;
encapsulatedFrame[3] = p.SourcePort.Host;
// frame type
encapsulatedFrame[4] = (byte)(_pupFrameType >> 8);
encapsulatedFrame[5] = (byte)_pupFrameType;
// Actual data
p.RawData.CopyTo(encapsulatedFrame, 6);
MacAddress destinationMac = new MacAddress(_10mbitBroadcast);
// Build the outgoing packet; place the source/dest addresses, type field and the PUP data.
EthernetLayer ethernetLayer = new EthernetLayer
{
Source = _interface.GetMacAddress(),
Destination = destinationMac,
EtherType = (EthernetType)_3mbitFrameType,
};
PayloadLayer payloadLayer = new PayloadLayer
{
Data = new Datagram(encapsulatedFrame),
};
PacketBuilder builder = new PacketBuilder(ethernetLayer, payloadLayer);
// Send it over the 'net!
_communicator.SendPacket(builder.Build(DateTime.Now));
}
public BSPChannel(PUP rfcPup, UInt32 socketID)
{
_inputLock = new ReaderWriterLockSlim();
_outputLock = new ReaderWriterLockSlim();
_inputWriteEvent = new AutoResetEvent(false);
_inputQueue = new Queue <ushort>(65536);
_outputAckEvent = new AutoResetEvent(false);
_outputReadyEvent = new AutoResetEvent(false);
_dataReadyEvent = new AutoResetEvent(false);
_outputQueue = new Queue <byte>(65536);
_outputWindow = new List <PUP>(16);
_outputWindowLock = new ReaderWriterLockSlim();
_destroyed = false;
// Init IDs, etc. based on RFC PUP
_lastClientRecvPos = _startPos = _recvPos = _sendPos = rfcPup.ID;
// Set up socket addresses.
// The client sends the connection port it prefers to use
// in the RFC pup.
_clientConnectionPort = new PUPPort(rfcPup.Contents, 0);
_originalDestinationPort = rfcPup.DestinationPort;
// If the client doesn't know what network it's on, it's now on ours.
if (_clientConnectionPort.Network == 0)
{
_clientConnectionPort.Network = DirectoryServices.Instance.LocalNetwork;
}
// We create our connection port using a unique socket address.
_serverConnectionPort = new PUPPort(DirectoryServices.Instance.LocalHostAddress, socketID);
//
// Init MaxPups to indicate that we need to find out what the client actually supports when we first
// start sending data.
//
_clientLimits.MaxPups = 0xffff;
// Create our consumer thread for output and kick it off.
_consumerThread = new Thread(OutputConsumerThread);
_consumerThread.Start();
}
public void RecvAck(PUP p)
{
//
// Sanity check that the client's position matches ours.
//
_lastRecvPos = p.ID;
if (_lastRecvPos != _sendPos)
{
Log.Write(LogType.Error, LogComponent.EFTP, "Client position does not match server ({0} != {1}",
_lastRecvPos, _sendPos);
}
//
// Unblock those waiting for an ACK.
//
_outputAckEvent.Set();
}
private void GatewayInformationWorker()
{
uint infoPupID = (uint)(new Random().Next());
while (true)
{
//
// From gatewayinformation.press:
// "Each gateway host must also periodically broadcast Gateway Information Pups, as described above,
// on all directly-connected networks. The frequency of this broadcast should be approximately one
// every 30 seconds, and immediately whenever the gateway’s own routing table changes (see below).
// These Pups should be sent from socket 2 to socket 2."
//
// At this time, we don't do anything with gateway information PUPs that we receive -- they could
// at some point be used as originally intended, to dynamically update routing tables, but it would
// require some serious security investments to make sure that the tables don't get poisoned.
// However, even though we don't use them, some Alto software does. For example, the PUP libraries
// used by Mazewar expect to get periodic updates or eventually it will assume the route is no longer
// viable and drop connections.
//
// Delay 30 seconds
Thread.Sleep(30000);
byte[] infoArray = GetGatewayInformationArray();
// From us, on socket 2
PUPPort localPort = new PUPPort(DirectoryServices.Instance.LocalHostAddress, 2);
//
// The set of known networks is by default the set of directly-connected networks.
//
byte[] knownNetworks = Router.Instance.RoutingTable.GetKnownNetworks();
foreach (byte network in knownNetworks)
{
// Send a broadcast to the specified network
PUPPort remotePort = new PUPPort(network, 0, 2);
PUP infoPup = new PUP(PupType.GatewayInformationResponse, infoPupID++, remotePort, localPort, infoArray);
Router.Instance.SendPup(infoPup);
Log.Write(LogComponent.MiscServices, "Gateway Information packet sent to network {0}", network);
}
}
}
/// <summary>
/// Called by dispatcher to send incoming data destined for this protocol
/// </summary>
/// <param name="p"></param>
public override void RecvData(PUP p)
{
switch (p.Type)
{
case PupType.GatewayInformationRequest:
SendGatewayInformationResponse(p);
break;
case PupType.GatewayInformationResponse:
// Currently a no-op.
Log.Write(LogComponent.MiscServices, String.Format("Gateway Information handler unimplemented."));
break;
default:
Log.Write(LogComponent.MiscServices, String.Format("Unhandled Gateway protocol {0} ({1})", p.Type, (int)p.Type));
break;
}
}
protected void Page_Load(object sender, EventArgs e)
{
SiteID = PUP.SiteID;
//T = PUP.WrapID + "." + PUP.SiteID; // Wrap and SiteID
if (PUP.IContains(PUP.Host, "localhost") || PUP.IContains(PUP.Host, "review."))
{
T += "?db=system";
}
//TitleLT.Text = PUP.SiteTitle.ToUpper();
FooterLiteral.Text = GetFooterLinks("");
AllMenu();
if (PUP.IsMode("aep"))
{
NavPanel.Visible = false;
FooterPanel.Visible = false;
}
}
/// <summary>
/// Invoked when the client sends an ACK.
/// Update our record of the client's PUP buffers.
/// </summary>
/// <param name="ackPUP"></param>
public void RecvAck(PUP ackPUP)
{
//_outputWindowLock.EnterWriteLock();
_clientLimits = (BSPAck)Serializer.Deserialize(ackPUP.Contents, typeof(BSPAck));
Log.Write(LogType.Verbose, LogComponent.BSP,
"ACK from client: bytes sent {0}, max bytes {1}, max pups {2}",
_clientLimits.BytesSent,
_clientLimits.MaxBytes,
_clientLimits.MaxPups);
_lastClientRecvPos = ackPUP.ID;
//
// Unblock those waiting for an ACK.
//
_outputAckEvent.Set();
}
public static void RecvData(PUP p)
{
EFTPChannel channel = FindChannelForPup(p);
if (channel == null)
{
Log.Write(LogType.Error, LogComponent.EFTP, "Received EFTP PUP on an unconnected socket, ignoring.");
return;
}
switch (p.Type)
{
case PupType.EFTPData:
{
channel.RecvData(p);
}
break;
case PupType.EFTPAck:
{
channel.RecvAck(p);
}
break;
case PupType.EFTPEnd:
{
channel.End(p);
}
break;
case PupType.EFTPAbort:
{
string abortMessage = Helpers.ArrayToString(p.Contents);
Log.Write(LogType.Warning, LogComponent.RTP, String.Format("EFTP aborted, message: '{0}'", abortMessage));
DestroyChannel(channel);
}
break;
default:
throw new NotImplementedException(String.Format("Unhandled EFTP PUP type {0}.", p.Type));
}
}
private void Receive(MemoryStream packetStream)
{
//
// Look for PUPs, forward them on.
//
// Read the length prefix (in words), convert to bytes.
// Subtract off 2 words for the ethernet header
int length = ((packetStream.ReadByte() << 8) | (packetStream.ReadByte())) * 2 - 4;
// Read the address (1st word of 3mbit packet)
byte destination = (byte)packetStream.ReadByte();
byte source = (byte)packetStream.ReadByte();
// Read the type and switch on it
int etherType3mbit = ((packetStream.ReadByte() << 8) | (packetStream.ReadByte()));
//
// Ensure this is a packet we're interested in.
//
if (etherType3mbit == _pupFrameType && // it's a PUP
(destination == DirectoryServices.Instance.LocalHost || // for us, or...
destination == 0)) // broadcast
{
try
{
Log.Write(LogType.Normal, LogComponent.UDP, "UDP receive");
PUP pup = new PUP(packetStream, length);
_routerCallback(pup, destination != 0);
}
catch (Exception e)
{
// An error occurred, log it.
Log.Write(LogType.Error, LogComponent.PUP, "UDP Error handling PUP: {0} {1} {2}", e.Message, e.StackTrace, e.InnerException);
}
}
else
{
Log.Write(LogType.Warning, LogComponent.Ethernet, "UDP packet is not a PUP, dropping");
}
}
/// <summary>
/// Adds the specified data/mark PUP to the moving output window, these PUPs will be picked up by the Output Thread
/// and sent when the client is ready for them.
/// </summary>
/// <param name="p"></param>
private void AddPupToOutputWindow(PUP p)
{
// Ensure things are set up
EstablishWindow();
_outputWindowLock.EnterUpgradeableReadLock();
if (_outputWindow.Count < _clientLimits.MaxPups)
{
//
// There's space in the window, so go for it.
//
_outputWindowLock.EnterWriteLock();
_outputWindow.Add(p);
_outputWindowLock.ExitWriteLock();
}
else
{
//
// No space right now -- wait until the consumer has made some space.
//
// Leave the lock so the consumer is unblocked
_outputWindowLock.ExitUpgradeableReadLock();
_outputReadyEvent.WaitOne();
// Re-enter.
_outputWindowLock.EnterUpgradeableReadLock();
_outputWindowLock.EnterWriteLock();
_outputWindow.Add(p);
_outputWindowLock.ExitWriteLock();
}
//
// Tell the Consumer thread we've added a new PUP to be consumed.
//
_dataReadyEvent.Set();
_outputWindowLock.ExitUpgradeableReadLock();
}
public bool AddPersonaje(Personaje personaje, int idUser, int idPartida)
{
var per = _personaje.AddPersonaje(personaje);
PUP pup = new PUP();
PersonajesCapacidades personajesCapacidades = new PersonajesCapacidades();
pup.PersonajeId = per.PersonajeId;
pup.UserId = idUser;
pup.PartidaId = idPartida;
var classCharacterCpacidades = _classCharacterCpacidadesData.GetClassCharacterCapacidades(per.ClassCharacterId.GetValueOrDefault());
foreach (var clases in classCharacterCpacidades)
{
personajesCapacidades.CapacidadId = clases.CapacidadId;
personajesCapacidades.PersonajeId = per.PersonajeId;
personajesCapacidades.Nivel = 1;
_personajesCapacidadesData.AddPersonajesCapacidades(personajesCapacidades);
}
_pupdata.Add(pup);
return(true);
}
/// <summary>
/// Routes a PUP out to the world.
/// </summary>
/// <param name="p"></param>
private void RouteOutgoingPacket(PUP p)
{
//
// Check the destination network. If it's 0 (meaning the sender doesn't know
// what network it's on, or wants it to go out to whatever network it's currently
// connected to) or it's destined for our network, we send it out directly through
// the local network interface.
//
if (p.DestinationPort.Network == 0 ||
p.DestinationPort.Network == DirectoryServices.Instance.LocalNetwork)
{
_pupPacketInterface.Send(p);
}
else
{
//
// Not for our network -- see if we know what network this is going to.
//
RoutePacketExternally(p);
}
}
/// <summary>
/// Sends data to the channel (i.e. to the client). Will block (waiting for an ACK) if an ACK is requested.
/// </summary>
/// <param name="data">The data to be sent</param>
/// <param name="flush">Whether to flush data out immediately or to wait for enough for a full PUP first.</param>
public void Send(byte[] data, int length, bool flush)
{
if (length > data.Length)
{
throw new InvalidOperationException("Length must be less than or equal to the size of data.");
}
if (_destroyed)
{
return;
}
// Add output data to output queue.
// Again, this is really inefficient
for (int i = 0; i < length; i++)
{
_outputQueue.Enqueue(data[i]);
}
if (flush || _outputQueue.Count >= PUP.MAX_PUP_SIZE)
{
// Send data until all is used (for a flush) or until we have less than a full PUP (non-flush).
while (_outputQueue.Count >= (flush ? 1 : PUP.MAX_PUP_SIZE))
{
byte[] chunk = new byte[Math.Min(PUP.MAX_PUP_SIZE, _outputQueue.Count)];
// Ugh.
for (int i = 0; i < chunk.Length; i++)
{
chunk[i] = _outputQueue.Dequeue();
}
// Send the data.
PUP dataPup = new PUP(flush ? PupType.AData : PupType.Data, _sendPos, _clientConnectionPort, _serverConnectionPort, chunk);
SendDataPup(dataPup);
}
}
}
/// <summary>
/// Worker thread for UDP packet receipt.
/// </summary>
private void GatewayReceiveThread()
{
// Just call Receive forever, that's it. This will never return.
// (probably need to make this more elegant so we can tear down the thread
// properly.)
Log.Write(LogComponent.Routing, "Gateway UDP Receiver thread started for port {0}.", _gatewayUdpPort);
IPEndPoint groupEndPoint = new IPEndPoint(IPAddress.Any, Configuration.UDPPort);
while (true)
{
byte[] data = null;
try
{
data = _gatewayUdpClient.Receive(ref groupEndPoint);
}
catch (Exception e)
{
//
// This can happen on occasion for reasons I don't quite understand.
// We will log the failure and attempt to continue.
//
Log.Write(LogType.Error,
LogComponent.Routing,
"Gateway UDP client receive failed, error {0}. Continuing.",
e.Message);
continue;
}
// 1) validate that the packet came in on the right port
// 2) validate packet
// 3) get a PUP out of it
// 4) send to RouteIncomingPacket.
// 5) do it again.
if (groupEndPoint.Port == _gatewayUdpPort)
{
if (data.Length < PUP.PUP_HEADER_SIZE + PUP.PUP_CHECKSUM_SIZE ||
data.Length > PUP.MAX_PUP_SIZE + PUP.PUP_HEADER_SIZE + PUP.PUP_CHECKSUM_SIZE)
{
Log.Write(LogType.Error, LogComponent.Routing, "External PUP has an invalid size ({0}). Dropping.", data.Length);
continue;
}
try
{
//
// See if we can get a PUP out of this.
//
PUP externalPUP = new PUP(new MemoryStream(data), data.Length);
//
// TODO: should technically bump the PUP's TransportControl field up;
// really need to rewrite the PUP class to make this possible without
// building up an entirely new PUP.
//
RouteIncomingExternalPacket(externalPUP);
Log.Write(LogType.Verbose,
LogComponent.Routing,
"<- External PUP received from {0}:{1}, type {2} source {3} destination {4}. Routing to local network.",
groupEndPoint.Address,
groupEndPoint.Port,
externalPUP.Type,
externalPUP.SourcePort,
externalPUP.DestinationPort);
}
catch (Exception e)
{
Log.Write(LogType.Error, LogComponent.Routing, "Error handling external PUP: {0}", e.Message);
}
}
else
{
Log.Write(LogType.Verbose,
LogComponent.Routing,
"Packet from {0} received on wrong port ({1}), expected {2}.",
groupEndPoint.Address,
groupEndPoint.Port,
_gatewayUdpPort);
}
}
}
