IPeerChannelWrapper mParticipant; //our interface to the channel
public P2PLib()
{
mNodeName = mPassword = mNetworkName = null;
mFactory = null;
mParticipant = null;
mDisposed = false;
}
/// <summary>
/// Async call back from beginning to open the graph.
/// </summary>
/// <param name="result">the result returned</param>
void ProcessOpen(IAsyncResult result)
{
//if they canceled out while we were connecting the object will be disposed.
//if so just do nothing.
if (false == mDisposed)
{
try
{
mParticipant.EndOpen(result);
}
catch (TimeoutException)
{
System.Windows.MessageBox.Show(String.Format("Unable to join the Network because the maximum time allowed was exceeded"));
return;
}
catch (Exception e)
{
if (null != e.InnerException)
{
System.Windows.MessageBox.Show(String.Format("Unable to join the network because: {0}", e.InnerException.Message));
}
mParticipant = null;
return;
}
mParticipant.Join(mNodeName); //make a service call so the other nodes know we have just joined.
}
}
public void Dispose()
{
if (mDisposed)
{
return;
}
try
{
if (mParticipant != null)
{
mParticipant.Leave(mNodeName);
//mParticipant.Close();
//mParticipant.Abort();
}
}
catch (InvalidOperationException)
{
//safely ignore. This exception occurs when we are in the process of opening when they quit the application.
//catch the exception to ignore it.
}
if (mFactory != null)
{
mFactory.Close();
}
mParticipant.Abort();
mParticipant.Dispose();
mParticipant = null;
mDisposed = true;
}
public StreamingHelper(IPeerChannelWrapper participant, string nodeName, ShareStreamHandler s)
{
mNodeName = nodeName;
streamedState = StreamedStateType.Initial;
mChunk = 0;
mLastChunk = -1;
del = s;
//////////////////////////////////////////////////////////////////////////
// Start up an Audio Watchdog timer so if we don't receive a packet after the hard-coded
// 20000ms we'll timeout and assume the sending node was lost.
//////////////////////////////////////////////////////////////////////////
mWatchDog = new Timer(new TimerCallback(Watchdog));
mWatchDog.Change(0, 20000);//every 20000ms get a callback
}
/// <summary>
/// The constructor for this. In addition to initializing all of the parameters it attempts to open and connect
/// to the network. This is done asynchronously with ProcessOpen being called either after a timeout (hard coded to 1 minute)
/// or when a response is received.
/// </summary>
/// <param name="nodeName">the unique nodename</param>
/// <param name="networkName">the name of the network</param>
/// <param name="password">the password for the network</param>
public bool PeerChannelWrapperStart(String nodeName, String networkName, String password)
{
CheckDisposed();
//////////////////////////////////////////////////////////////////////////
//Initialize all the parameters...
//////////////////////////////////////////////////////////////////////////
mNodeName = nodeName;
mNetworkName = networkName;
//password cannot be empty otherwise mFactory.CreateChannel() below will throw an exception
if (string.IsNullOrEmpty(password))
{
mPassword = "******";
}
else
{
mPassword = password.Trim();
}
//Construct InstanceContext to handle messages on callback interface.
mInstanceContext = new InstanceContext(this);
//////////////////////////////////////////////////////////////////////////
//Create the PeerTcpBinding
//////////////////////////////////////////////////////////////////////////
NetPeerTcpBinding p2pBinding = new NetPeerTcpBinding();
p2pBinding.Name = "BindingDefault";
p2pBinding.Port = 0; //dynamic port
p2pBinding.MaxReceivedMessageSize = 70000000; //set the max message size in bytes (70mb)
p2pBinding.Resolver.Mode = PeerResolverMode.Pnrp; //use the standard pnrp for our resolver to find the network
//////////////////////////////////////////////////////////////////////////
//create the Endpoint Address and Service Endpoint.
//////////////////////////////////////////////////////////////////////////
String bindingInfo = "net.p2p://"; //the endpoint address for a NetPeerTcpBinding must start with net.p2p
EndpointAddress epa = new EndpointAddress(String.Concat(bindingInfo, mNetworkName));
ServiceEndpoint serviceEndpoint = new ServiceEndpoint(ContractDescription.GetContract(typeof(IPeerChannel)), p2pBinding, epa);
//////////////////////////////////////////////////////////////////////////
// Create the participant with the given endpoint configuration
// Each participant opens a duplex channel to the mesh
// participant is an instance of the channel to the mesh
//////////////////////////////////////////////////////////////////////////
mFactory = new DuplexChannelFactory <IPeerChannelWrapper>(mInstanceContext, serviceEndpoint);
mFactory.Credentials.Peer.MeshPassword = mPassword;
mParticipant = mFactory.CreateChannel();
mPicture = new PictureHelper(mParticipant.SharePicture, mNodeName);
mTextPeerChannelHelper = new ChatHelper(mParticipant.ShareTextMessage);
mFilePeerChannelHelper = new FileHelper(mParticipant.ShareFile);
mStreamedAudio = new StreamingHelper(mParticipant, mNodeName, mParticipant.ShareStreamedAudio);
mStreamedVideo = new StreamingHelper(mParticipant, mNodeName, mParticipant.ShareStreamedVideo);
//////////////////////////////////////////////////////////////////////////
//Start an asynchronous call that will try to open a connection to the network.
//if one is not found, but the pnrp resolver is running then a new network will be
//created.
//////////////////////////////////////////////////////////////////////////
try
{
AsyncCallback callBack = new AsyncCallback(ProcessOpen);
TimeSpan ts = new TimeSpan(0, 1, 0); //wait a minute
mParticipant.BeginOpen(ts, callBack, this);
}
catch (CommunicationException e)
{
System.Windows.MessageBox.Show(String.Format("Error while joining the network: {0}", e.Message));
mParticipant = null;
return(false);
}
return(true);
}
