/// Last Modified: 10/24/10
/// <summary>
/// Connect the node depending on the hosting state.
/// Hosting Enabled: Begin running the server.
/// Hosting Disabled: Connects to the host.
/// </summary>
/// -----------------------------------------------------
/// PRECONDITIONS: NA -- No preconditions exist.
/// -----------------------------------------------------
/// Parameters:
/// -----------------------------------------------------
/// POSTCONDITIONS:
/// 1) The host server will be running.
/// 2) The child node will attempt to connect to the server.
/// -----------------------------------------------------
/// Return Value:
private void Connect()
{
try
{
NodeSimpleSecurityModel nssm = null;
if(!String.IsNullOrEmpty(txtPassphrase.Text))
nssm = new NodeSimpleSecurityModel(SimpleCryptography.EncryptionScheme.DES, txtPassphrase.Text);
//The host never generates an asynchronous event and either fails
// or succeeds immediately.
SafelyToggleInterfaceState(true);
//Determine if the node will be a host/parent.
if (m_IsHosting)
{
//Obtain the port to listen on.
int nPort = int.Parse(txtListeningPort.Text);
//Create the parent node and start listening.
ParentNode pn = new ParentNode(nPort, nssm);
pn.NodeEventCallback = ParentNode_OnNodeEvent;
pn.Start();
//Update the hosting status.
lblStatus.Text = "Running...";
m_Node = pn;
//Update the notification icon to reflect the node's name.
cmiNodeType.Text = notificationIcon.Text = "DSChat [Parent]";
//Neutral Max means everything is okay.
SafelySetIcon(DSChat.Properties.Resources.MAX);
IsConnected = ConnectionState.Connected;
}
//This would be a child node.
else
{
//Obtain the port to listen on for responses.
int nListeningPort = int.Parse(txtListeningPort.Text);
//Obtain the server address & port of the parent\host.
int nHostPort = int.Parse(txtHostPort.Text);
IPAddress ipAddy = NodeSocket.GetIP4HostAddresses(txtServer.Text);
//Create the child node and register it with the parent with the
// node name provided.
ChildNode cn = new ChildNode(nListeningPort, nssm);
cn.NodeName = txtName.Text;
cn.NodeEventCallback = ChildNode_OnNodeEvent;
cn.Start(ipAddy, nHostPort);
m_Node = cn;
//Update the notification icon to reflect the node's name.
cmiNodeType.Text = notificationIcon.Text = "DSChat [" + txtName.Text + "]";
//The connection has not been made and synchornization is not required here
// as the thread has not been spun up yet.
IsConnected = ConnectionState.IsConnecting;
SetStatusLabel("Connecting...");
m_connectionWaitingThread = new Thread(ThreadProc_WaitingForConnection);
m_connectionWaitingThread.Start((object)this);
}
}
catch (Exception ex)
{
SetStatusLog(ex.Message);
Disconnect();
}
}
/// <summary>
/// Creates an instance.
/// </summary>
/// <param name="chatform"></param>
public void Create(string friendsUserId, string currentUserId, ChildNode cn)
{
//Set the chatform and dump the offline message into the new chatform.
if (m_chatform == null)
{
m_chatform = new ChatForm(friendsUserId, currentUserId, cn);
if (m_offlineChat != null)
m_chatform.WriteMessageToChatLog(m_offlineChat);
}
}
/// Last Modified: 9/21/10
/// <summary>
/// A customized constructor that allows for instantiation of the forms primary properties.
/// </summary>
/// -----------------------------------------------------
/// PRECONDITIONS: NA -- No preconditions exist.
/// -----------------------------------------------------
/// Parameters:
/// <param name="friendsUserId">
/// The UserId of the individual "friend" that this user is chatting with.
/// </param>
/// <param name="currentUserId">
/// The UserId of this user.
/// </param>
/// <param name="cn">
/// The current child node used to communicate with the host.
/// </param>
/// -----------------------------------------------------
/// POSTCONDITIONS: NA -- No postconditions exist.
/// -----------------------------------------------------
/// Return Value:
public ChatForm(string friendsUserId, string currentUserId, ChildNode cn)
: this()
{
//Assign the properties.
FriendsUserId = friendsUserId;
YourUserId = currentUserId;
Node = cn;
//Update the caption of the form.
this.Text = FriendsUserId;
}