/// <summary>
/// Connects to the server and then logs you in
/// </summary>
/// <param name="un">The user's username</param>
/// <param name="password">The user's password</param>
/// <returns>True if the login is successful, false otherwise</returns>
/// <example><code>if (!ClientNetwork.logInToServer("Username", "Password"))
/// MessageBox.Show("Log in failed");</code></example>
public static bool logInToServer(string un, string password)
{
// Close any existing connections
Disconnect(false);
Network.Header head;
string randomCodeData = "";
try // Connect to the server
{
TcpClient client = new TcpClient(IPAddress, Port);
connectionStream = client.GetStream();
connected = true;
byte[] header = new byte[Network.HEADER_SIZE];
for (int i = 0; i < Network.HEADER_SIZE; i++)
{
while (connectionStream.DataAvailable == false)
{} // ToDo: Add escape code
header[i] = (byte)connectionStream.ReadByte();
}
head = Network.bytesToHeader(header);
byte[] randomCode = new byte[head.Length]; // Download the random pass code for security
for (int i = 0; i < head.Length; i++)
{
while (connectionStream.DataAvailable == false)
{} // ToDo: Add escape code
randomCode[i] = (byte)connectionStream.ReadByte();
}
randomCodeData = System.Text.UnicodeEncoding.Unicode.GetString(randomCode, 0, (int)head.Length);
}
catch
{
//System.Windows.Forms.MessageBox.Show("Could not connect to host");
connected = false;
return false;
}
if (head.DataType != Network.DataTypes.RandomPassCode) // Wrong type for first packet
{
//System.Windows.Forms.MessageBox.Show("Illegal data received from host");
connected = false;
return false;
}
// Create secure password
password = SDCSCommon.CryptoFunctions.getMD5Hash(String.Concat(SDCSCommon.CryptoFunctions.getMD5Hash(password), randomCodeData));
Network.Header sendHead = new Network.Header();
sendHead.DataType = Network.DataTypes.LoginInformation;
sendHead.FromID = 0;
sendHead.ToID = -1;
byte[] passBytes = System.Text.UnicodeEncoding.Unicode.GetBytes(password);
byte[] usernameBytes = System.Text.UnicodeEncoding.Unicode.GetBytes(un);
sendHead.Length = passBytes.Length + usernameBytes.Length + 4;
SendData(SDCSCommon.Network.headerToBytes(sendHead), BitConverter.GetBytes(usernameBytes.Length), usernameBytes, passBytes);
byte[] statusHeader = new byte[Network.HEADER_SIZE];
for (int i = 0; i < Network.HEADER_SIZE; i++)
{
while (connectionStream.DataAvailable == false)
{} // ToDo: Add escape code
statusHeader[i] = (byte)connectionStream.ReadByte();
}
Network.Header statusHead = Network.bytesToHeader(statusHeader);
byte[] statusCode = new byte[statusHead.Length]; // Download the random pass code for security
for (int i = 0; i < statusHead.Length; i++)
{
while (connectionStream.DataAvailable == false)
{} // ToDo: Add escape code
statusCode[i] = (byte)connectionStream.ReadByte();
}
if (!(statusHead.DataType == Network.DataTypes.LoginStatus && BitConverter.ToInt32(statusCode, 0) == Network.LoginOK))
{
connected = false;
try
{
connectionStream.Close();
}
catch
{}
return false;
}
username = un;
listeningThread = new Thread(new ThreadStart(listeningFunc));
listeningThread.Start();
return true;
}
/// <summary>
/// Sends an IM to the user specified by the toID with the message passed to this function.
/// </summary>
/// <param name="toID">The userID of the user this message is to be sent to</param>
/// <param name="message">The message to send</param>
/// <returns>True if the sending was successful (doesn't mean the user received it, only that it was sent to the server), false otherwise.</returns>
/// <example><code>public void btnSendIM_clicked(object o, EventArgs e)
/// {
/// // This assumes that a function for looking up a user ID has been written and that txtUsername and txtMessage are text boxes.
/// if (!SendIM(lookupUserID(txtUsername.Text), txtMessage.Text))
/// MessageBox.Show("Connection to server lost");
/// }</code></example>
public static bool SendIM(int toID, string message)
{
Network.Header head = new Network.Header();
// FromID is set at the server
head.FromID = 0;
head.ToID = toID;
head.DataType = Network.DataTypes.InstantMessage;
byte[] data = System.Text.UnicodeEncoding.Unicode.GetBytes(message);
head.Length = data.Length;
return SendData(Network.headerToBytes(head), data);
}
private void sendBuddyListData()
{
// This code effectively creates a semaphore
lock (BuddyListData.SyncRoot)
{
Network.Header buddyHeader = new Network.Header();
buddyHeader.DataType = Network.DataTypes.BuddyListUpdate;
buddyHeader.FromID = -1;
buddyHeader.ToID = conn.userID;
byte[] buddyBytes = Network.BuddyListDataToBytes((Network.BuddyListData[])BuddyListData.ToArray(typeof(Network.BuddyListData)));
buddyHeader.Length = buddyBytes.Length;
sendData(Network.headerToBytes(buddyHeader), buddyBytes);
BuddyListData.Clear();
}
}
