public void Leave()
{
// Check if we can leave.
/////////////////////////
if (connection == null)
{
throw new SpreadException("No group to leave.");
}
// Get a new message.
/////////////////////
SpreadMessage leaveMessage = new SpreadMessage();
// Set the group we're sending to.
//////////////////////////////////
leaveMessage.AddGroup(name);
// Set the service type.
////////////////////////
leaveMessage.ServiceType = SpreadMessage.LEAVE_MESS;
// Send the message.
////////////////////
connection.Multicast(leaveMessage);
// No longer connected.
///////////////////////
connection = null;
}
public void Join(SpreadConnection c, string groupName)
{
// Check if this group has already been joined.
///////////////////////////////////////////////
if (this.connection != null)
{
throw new SpreadException("Already joined.");
}
// Set member variables.
////////////////////////
this.connection = c;
this.name = groupName;
// Error check the name.
////////////////////////
byte[] bytes;
try
{
bytes = System.Text.Encoding.ASCII.GetBytes(name);
}
catch (Exception e)
{
throw new SpreadException("Encoding not supported: " + e);
}
for (int i = 0; i < bytes.Length; i++)
{
// Make sure the byte (character) is within the valid range.
////////////////////////////////////////////////////////////
if ((bytes[i] < 36) || (bytes[i] > 126))
{
throw new SpreadException("Illegal character in group name.");
}
}
// Get a new message.
/////////////////////
SpreadMessage joinMessage = new SpreadMessage();
// Set the group we're sending to.
//////////////////////////////////
joinMessage.AddGroup(name);
// Set the service type.
////////////////////////
joinMessage.ServiceType = SpreadMessage.JOIN_MESS;
// Send the message.
////////////////////
connection.Multicast(joinMessage);
}
// Constructor.
///////////////
internal MembershipInfo(SpreadConnection connection, SpreadMessage message, bool daemonEndianMismatch)
{
// Set local variables.
///////////////////////
this.serviceType = message.ServiceType;
this.group = message.Sender;
this.members = message.Groups;
// Is this a regular membership message.
////////////////////////////////////////
if (IsRegularMembership)
{
// Extract the groupID.
///////////////////////
int dataIndex = 0;
int[] id = new int[3];
id[0] = SpreadConnection.toInt(message.Data, dataIndex);
dataIndex += 4;
id[1] = SpreadConnection.toInt(message.Data, dataIndex);
dataIndex += 4;
id[2] = SpreadConnection.toInt(message.Data, dataIndex);
dataIndex += 4;
// Endian-flip?
///////////////
if (daemonEndianMismatch)
{
id[0] = SpreadConnection.flip(id[0]);
id[1] = SpreadConnection.flip(id[1]);
id[2] = SpreadConnection.flip(id[2]);
}
// Create the group ID.
///////////////////////
this.groupID = new GroupID(id[0], id[1], id[2]);
// Get the number of groups.
////////////////////////////
int numGroups = SpreadConnection.toInt(message.Data, dataIndex);
if (daemonEndianMismatch)
{
numGroups = SpreadConnection.flip(numGroups);
}
dataIndex += 4;
// Get the groups.
//////////////////
this.groups = new SpreadGroup[numGroups];
for (int i = 0; i < numGroups; i++)
{
this.groups[i] = connection.toGroup(message.Data, dataIndex);
dataIndex += SpreadConnection.MAX_GROUP_NAME;
}
}
}
// Package constructor.
///////////////////////
internal SpreadGroup(SpreadConnection connection, String name)
{
// Store member variables.
//////////////////////////
this.connection = connection;
this.name = name;
}
public SpreadGroup()
{
// There is no connection yet.
//////////////////////////////
connection = null;
// There is no name.
////////////////////
name = null;
}
private void button1_Click(object sender, EventArgs e)
{
string address = null;
int port = 0;
string user = textBox1.Text;
handler = new SpreadConnection.MessageHandler(messageReceived);
try
{
connection = new SpreadConnection();
connection.Connect(address, port, user, false, true);
rtt = new Thread(new ThreadStart(this.run));
rtt.Start();
}
catch (SpreadException ex)
{
MessageBox.Show("There was an error connecting to the daemon."+ex.Message);
}
catch (Exception ex)
{
MessageBox.Show("Can't find the daemon " + address+ex.Message);
}
}
