private void CreateInvitationPrivateChat(BinaryID hashedPeerEmailAddress, BinaryID networkID, IPEndPoint peerEP, string message)
{
BitChatNetwork network = new BitChatNetwork(_connectionManager, _trustedRootCertificates, _supportedCryptoOptions, hashedPeerEmailAddress, networkID, null, BitChatNetworkStatus.Offline, peerEP.ToString(), message);
BitChat chat = CreateBitChat(network, BinaryID.GenerateRandomID160().ToString(), BinaryID.GenerateRandomID256().ID, 0, null, new BitChatProfile.SharedFileInfo[] { }, _profile.TrackerURIs, true, false, false);
RaiseEventBitChatInvitationReceived(chat);
}
public bool RequestStartTcpRelay(BinaryID[] networkIDs, Uri[] trackerURIs, int timeout)
{
BinaryID channelName = BinaryID.GenerateRandomID160();
object lockObject = new object();
lock (_tcpRelayRequestLockList)
{
_tcpRelayRequestLockList.Add(channelName, lockObject);
}
try
{
lock (lockObject)
{
using (MemoryStream mS = new MemoryStream(1024))
{
byte[] XORnetworkID = new byte[20];
byte[] randomChannelID = channelName.ID;
//write networkid list
mS.WriteByte(Convert.ToByte(networkIDs.Length));
foreach (BinaryID networkID in networkIDs)
{
byte[] network = networkID.ID;
for (int i = 0; i < 20; i++)
{
XORnetworkID[i] = (byte)(randomChannelID[i] ^ network[i]);
}
mS.Write(XORnetworkID, 0, 20);
}
//write tracker uri list
mS.WriteByte(Convert.ToByte(trackerURIs.Length));
foreach (Uri trackerURI in trackerURIs)
{
byte[] buffer = Encoding.UTF8.GetBytes(trackerURI.AbsoluteUri);
mS.WriteByte(Convert.ToByte(buffer.Length));
mS.Write(buffer, 0, buffer.Length);
}
byte[] data = mS.ToArray();
WriteFrame(SignalType.StartTcpRelay, channelName, data, 0, data.Length);
}
return(Monitor.Wait(lockObject, timeout));
}
}
finally
{
lock (_tcpRelayRequestLockList)
{
_tcpRelayRequestLockList.Remove(channelName);
}
}
}
public ConnectionManager(IPEndPoint localEP, ChannelRequest requestHandler)
{
try
{
_tcpListener = new TcpListener(localEP);
_tcpListener.Start(10);
}
catch
{
_tcpListener = new TcpListener(new IPEndPoint(localEP.Address, 0));
_tcpListener.Start(10);
}
_externalSelfEP = (IPEndPoint)_tcpListener.LocalEndpoint;
_requestHandler = requestHandler;
_localPeerID = BinaryID.GenerateRandomID160();
//start accepting connections
_tcpListenerThread = new Thread(AcceptTcpConnectionAsync);
_tcpListenerThread.IsBackground = true;
_tcpListenerThread.Start();
//start upnp process
_upnpTimer = new Timer(UPnPTimerCallback, null, 1000, Timeout.Infinite);
}
public BitChat CreateGroupChat(string networkName, string sharedSecret, bool enableTracking, bool dhtOnlyTracking)
{
Uri[] trackerURIs;
if (dhtOnlyTracking)
{
trackerURIs = new Uri[] { }
}
;
else
{
trackerURIs = _profile.TrackerURIs;
}
BitChatNetwork network = new BitChatNetwork(_connectionManager, _trustedRootCertificates, _supportedCryptoOptions, networkName, sharedSecret, null, null, new Certificate[] { }, BitChatNetworkStatus.Online);
return(CreateBitChat(network, BinaryID.GenerateRandomID160().ToString(), BinaryID.GenerateRandomID256().ID, -1, null, new BitChatProfile.SharedFileInfo[] { }, trackerURIs, enableTracking, false, false));
}
public BitChat CreatePrivateChat(MailAddress peerEmailAddress, string sharedSecret, bool enableTracking, bool dhtOnlyTracking, string invitationMessage)
{
Uri[] trackerURIs;
if (dhtOnlyTracking)
{
trackerURIs = new Uri[] { }
}
;
else
{
trackerURIs = _profile.TrackerURIs;
}
BitChatNetwork network = new BitChatNetwork(_connectionManager, _trustedRootCertificates, _supportedCryptoOptions, peerEmailAddress, sharedSecret, null, null, new Certificate[] { }, BitChatNetworkStatus.Online, _profile.LocalCertificateStore.Certificate.IssuedTo.EmailAddress.Address, invitationMessage);
return(CreateBitChat(network, BinaryID.GenerateRandomID160().ToString(), BinaryID.GenerateRandomID256().ID, 0, null, new BitChatProfile.SharedFileInfo[] { }, trackerURIs, enableTracking, !string.IsNullOrEmpty(invitationMessage), false));
}
private void RefreshBucketAsync(object state)
{
try
{
DhtClient dhtClient = state as DhtClient;
//get random node ID in the bucket range
BinaryID randomNodeID = (BinaryID.GenerateRandomID160() << _bucketDepth) | _bucketID;
//find closest contacts for current node id
NodeContact[] initialContacts = GetKClosestContacts(randomNodeID);
if (initialContacts.Length > 0)
{
dhtClient.QueryFindNode(initialContacts, randomNodeID); //query manager auto add contacts that respond
}
}
catch
{ }
}
private void ReadFrameAsync()
{
try
{
//frame parameters
int signalType;
BinaryID channelName = new BinaryID(new byte[20]);
int dataLength;
byte[] dataBuffer = new byte[BUFFER_SIZE];
while (true)
{
#region Read frame from base stream
//read frame signal
signalType = _baseStream.ReadByte();
if (signalType == -1)
{
return; //End of stream
}
//read channel name
OffsetStream.StreamRead(_baseStream, channelName.ID, 0, 20);
//read data length
OffsetStream.StreamRead(_baseStream, dataBuffer, 0, 2);
dataLength = BitConverter.ToUInt16(dataBuffer, 0);
//read data
if (dataLength > 0)
{
OffsetStream.StreamRead(_baseStream, dataBuffer, 0, dataLength);
}
#endregion
switch ((SignalType)signalType)
{
case SignalType.NOOP:
break;
case SignalType.ConnectChannelBitChatNetwork:
#region ConnectChannelBitChatNetwork
lock (_bitChatNetworkChannels)
{
if (_bitChatNetworkChannels.ContainsKey(channelName))
{
WriteFrame(SignalType.DisconnectChannelBitChatNetwork, channelName, null, 0, 0);
}
else
{
ChannelStream channel = new ChannelStream(this, channelName.Clone(), ChannelType.BitChatNetwork);
_bitChatNetworkChannels.Add(channel.ChannelName, channel);
BitChatNetworkChannelRequest.BeginInvoke(this, channel.ChannelName, channel, null, null);
}
}
//check if tcp relay is hosted for the channel. reply back tcp relay peers list if available
try
{
List <IPEndPoint> peerEPs = TcpRelayService.GetPeerEPs(channelName, this);
if ((peerEPs != null) && (peerEPs.Count > 0))
{
using (MemoryStream mS = new MemoryStream(128))
{
mS.WriteByte(Convert.ToByte(peerEPs.Count));
foreach (IPEndPoint peerEP in peerEPs)
{
IPEndPointParser.WriteTo(peerEP, mS);
}
byte[] data = mS.ToArray();
WriteFrame(SignalType.TcpRelayResponsePeerList, channelName, data, 0, data.Length);
}
}
}
catch
{ }
#endregion
break;
case SignalType.DataChannelBitChatNetwork:
#region DataChannelBitChatNetwork
try
{
ChannelStream channel = null;
lock (_bitChatNetworkChannels)
{
channel = _bitChatNetworkChannels[channelName];
}
channel.WriteBuffer(dataBuffer, 0, dataLength, _channelWriteTimeout);
}
catch
{ }
#endregion
break;
case SignalType.DisconnectChannelBitChatNetwork:
#region DisconnectChannelBitChatNetwork
try
{
ChannelStream channel;
lock (_bitChatNetworkChannels)
{
channel = _bitChatNetworkChannels[channelName];
_bitChatNetworkChannels.Remove(channelName);
}
channel.SetDisconnected();
channel.Dispose();
}
catch
{ }
#endregion
break;
case SignalType.ConnectChannelProxyTunnel:
#region ConnectChannelProxyTunnel
{
ChannelStream remoteChannel1 = null;
lock (_proxyChannels)
{
if (_proxyChannels.ContainsKey(channelName))
{
WriteFrame(SignalType.DisconnectChannelProxy, channelName, null, 0, 0);
}
else
{
//add first stream into list
remoteChannel1 = new ChannelStream(this, channelName.Clone(), ChannelType.ProxyTunnel);
_proxyChannels.Add(remoteChannel1.ChannelName, remoteChannel1);
}
}
if (remoteChannel1 != null)
{
IPEndPoint tunnelToRemotePeerEP = ConvertChannelNameToEp(channelName); //get remote peer ep
Connection remotePeerConnection = _connectionManager.GetExistingConnection(tunnelToRemotePeerEP); //get remote channel service
if (remotePeerConnection == null)
{
remoteChannel1.Dispose();
}
else
{
try
{
//get remote proxy connection channel stream
ChannelStream remoteChannel2 = remotePeerConnection.RequestProxyConnection(_remotePeerEP);
//join current and remote stream
Joint joint = new Joint(remoteChannel1, remoteChannel2);
joint.Disposed += joint_Disposed;
lock (_proxyTunnelJointList)
{
_proxyTunnelJointList.Add(joint);
}
joint.Start();
}
catch
{
remoteChannel1.Dispose();
}
}
}
}
#endregion
break;
case SignalType.ConnectChannelProxyConnection:
#region ConnectChannelProxyConnection
lock (_proxyChannels)
{
if (_proxyChannels.ContainsKey(channelName))
{
WriteFrame(SignalType.DisconnectChannelProxy, channelName, null, 0, 0);
}
else
{
//add proxy channel stream into list
ChannelStream channel = new ChannelStream(this, channelName.Clone(), ChannelType.ProxyTunnel);
_proxyChannels.Add(channel.ChannelName, channel);
//pass channel as connection async
ThreadPool.QueueUserWorkItem(AcceptProxyConnectionAsync, channel);
}
}
#endregion
break;
case SignalType.DataChannelProxy:
#region DataChannelProxy
try
{
ChannelStream channel = null;
lock (_proxyChannels)
{
channel = _proxyChannels[channelName];
}
channel.WriteBuffer(dataBuffer, 0, dataLength, _channelWriteTimeout);
}
catch
{ }
#endregion
break;
case SignalType.DisconnectChannelProxy:
#region DisconnectChannelProxy
try
{
ChannelStream channel;
lock (_proxyChannels)
{
channel = _proxyChannels[channelName];
_proxyChannels.Remove(channelName);
}
channel.SetDisconnected();
channel.Dispose();
}
catch
{ }
#endregion
break;
case SignalType.PeerStatusQuery:
#region PeerStatusQuery
try
{
if (_connectionManager.IsPeerConnectionAvailable(ConvertChannelNameToEp(channelName)))
{
WriteFrame(SignalType.PeerStatusAvailable, channelName, null, 0, 0);
}
}
catch
{ }
#endregion
break;
case SignalType.PeerStatusAvailable:
#region PeerStatusAvailable
try
{
lock (_peerStatusLockList)
{
object lockObject = _peerStatusLockList[channelName];
lock (lockObject)
{
Monitor.Pulse(lockObject);
}
}
}
catch
{ }
#endregion
break;
case SignalType.StartTcpRelay:
#region StartTcpRelay
{
BinaryID[] networkIDs;
Uri[] trackerURIs;
using (MemoryStream mS = new MemoryStream(dataBuffer, 0, dataLength, false))
{
//read network id list
networkIDs = new BinaryID[mS.ReadByte()];
byte[] XORnetworkID = new byte[20];
for (int i = 0; i < networkIDs.Length; i++)
{
mS.Read(XORnetworkID, 0, 20);
byte[] networkID = new byte[20];
for (int j = 0; j < 20; j++)
{
networkID[j] = (byte)(channelName.ID[j] ^ XORnetworkID[j]);
}
networkIDs[i] = new BinaryID(networkID);
}
//read tracker uri list
trackerURIs = new Uri[mS.ReadByte()];
byte[] data = new byte[255];
for (int i = 0; i < trackerURIs.Length; i++)
{
int length = mS.ReadByte();
mS.Read(data, 0, length);
trackerURIs[i] = new Uri(Encoding.UTF8.GetString(data, 0, length));
}
}
lock (_tcpRelays)
{
foreach (BinaryID networkID in networkIDs)
{
if (!_tcpRelays.ContainsKey(networkID))
{
TcpRelayService relay = TcpRelayService.StartTcpRelay(networkID, this, _connectionManager.LocalPort, _connectionManager.DhtClient, trackerURIs);
_tcpRelays.Add(networkID, relay);
}
}
}
WriteFrame(SignalType.TcpRelayResponseSuccess, channelName, null, 0, 0);
}
#endregion
break;
case SignalType.StopTcpRelay:
#region StopTcpRelay
{
BinaryID[] networkIDs;
using (MemoryStream mS = new MemoryStream(dataBuffer, 0, dataLength, false))
{
//read network id list
networkIDs = new BinaryID[mS.ReadByte()];
byte[] XORnetworkID = new byte[20];
for (int i = 0; i < networkIDs.Length; i++)
{
mS.Read(XORnetworkID, 0, 20);
byte[] networkID = new byte[20];
for (int j = 0; j < 20; j++)
{
networkID[j] = (byte)(channelName.ID[j] ^ XORnetworkID[j]);
}
networkIDs[i] = new BinaryID(networkID);
}
}
lock (_tcpRelays)
{
foreach (BinaryID networkID in networkIDs)
{
if (_tcpRelays.ContainsKey(networkID))
{
_tcpRelays[networkID].StopTcpRelay(this);
_tcpRelays.Remove(networkID);
}
}
}
WriteFrame(SignalType.TcpRelayResponseSuccess, channelName, null, 0, 0);
}
#endregion
break;
case SignalType.TcpRelayResponseSuccess:
#region TcpRelayResponseSuccess
try
{
lock (_tcpRelayRequestLockList)
{
object lockObject = _tcpRelayRequestLockList[channelName];
lock (lockObject)
{
Monitor.Pulse(lockObject);
}
}
}
catch
{ }
#endregion
break;
case SignalType.TcpRelayResponsePeerList:
#region TcpRelayResponsePeerList
using (MemoryStream mS = new MemoryStream(dataBuffer, 0, dataLength, false))
{
int count = mS.ReadByte();
List <IPEndPoint> peerEPs = new List <IPEndPoint>(count);
for (int i = 0; i < count; i++)
{
peerEPs.Add(IPEndPointParser.Parse(mS));
}
TcpRelayPeersAvailable.BeginInvoke(this, channelName.Clone(), peerEPs, null, null);
}
#endregion
break;
case SignalType.DhtPacketData:
#region DhtPacketData
byte[] response = _connectionManager.DhtClient.ProcessPacket(dataBuffer, 0, dataLength, _remotePeerEP.Address);
if (response != null)
{
WriteFrame(SignalType.DhtPacketData, BinaryID.GenerateRandomID160(), response, 0, response.Length);
}
#endregion
break;
case SignalType.BitChatNetworkInvitation:
#region ChannelInvitationBitChatNetwork
if (_connectionManager.Profile.AllowInboundInvitations)
{
BitChatNetworkInvitation.BeginInvoke(channelName.Clone(), _remotePeerEP, Encoding.UTF8.GetString(dataBuffer, 0, dataLength), null, null);
}
#endregion
break;
default:
throw new IOException("Invalid frame signal type.");
}
}
}
catch
{ }
finally
{
Dispose();
}
}
public void SendDhtPacket(byte[] buffer, int offset, int count)
{
WriteFrame(SignalType.DhtPacketData, BinaryID.GenerateRandomID160(), buffer, offset, count);
}
public void SendNOOP()
{
WriteFrame(SignalType.NOOP, BinaryID.GenerateRandomID160(), null, 0, 0);
}
public ConnectionManager(BitChatProfile profile)
{
IPEndPoint localEP;
switch (Environment.OSVersion.Platform)
{
case PlatformID.Win32NT:
if (Environment.OSVersion.Version.Major < 6)
{
//below vista
_tcpListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
localEP = new IPEndPoint(IPAddress.Any, profile.LocalPort);
}
else
{
//vista & above
_tcpListener = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);
_tcpListener.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, false);
localEP = new IPEndPoint(IPAddress.IPv6Any, profile.LocalPort);
}
break;
case PlatformID.Unix: //mono framework
if (Socket.OSSupportsIPv6)
{
_tcpListener = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);
localEP = new IPEndPoint(IPAddress.IPv6Any, profile.LocalPort);
}
else
{
_tcpListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
localEP = new IPEndPoint(IPAddress.Any, profile.LocalPort);
}
break;
default: //unknown
_tcpListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
localEP = new IPEndPoint(IPAddress.Any, profile.LocalPort);
break;
}
try
{
_tcpListener.Bind(localEP);
_tcpListener.Listen(10);
}
catch
{
localEP.Port = 0;
_tcpListener.Bind(localEP);
_tcpListener.Listen(10);
}
_profile = profile;
_localPort = (_tcpListener.LocalEndPoint as IPEndPoint).Port;
_localPeerID = BinaryID.GenerateRandomID160();
//start dht
_dhtClient = new DhtClient(_localPort, this);
_dhtClient.ProxyEnabled = (_profile.Proxy != null);
_dhtClient.AddNode(profile.BootstrapDhtNodes);
//setup dht seeding tracker
_dhtSeedingTracker = new TrackerManager(_dhtSeedingNetworkID, _localPort, null, DHT_SEED_TRACKER_UPDATE_INTERVAL);
_dhtSeedingTracker.Proxy = _profile.Proxy;
_dhtSeedingTracker.DiscoveredPeers += dhtSeedingTracker_DiscoveredPeers;
_dhtSeedingTracker.StartTracking(profile.TrackerURIs);
//start accepting connections
_tcpListenerThread = new Thread(AcceptTcpConnectionAsync);
_tcpListenerThread.IsBackground = true;
_tcpListenerThread.Start(_tcpListener);
//start upnp process
_connectivityCheckTimer = new Timer(ConnectivityCheckTimerCallback, null, 1000, Timeout.Infinite);
}
protected NodeContact(int udpDhtPort)
{
_nodeID = BinaryID.GenerateRandomID160();
_nodeEP = new IPEndPoint(IPAddress.Loopback, udpDhtPort);
_currentNode = true;
}
