public static byte[] CreateMutualContactStatusMessage(int userId)
{
UserObj user;
if (_users.Any(x => x.ID == userId))
{
user = _users.Find(x => x.ID == userId);
}
else
{
user = DatabaseCommunication.ReadUser(userId);
}
byte[] dataBytes;
dataBytes = ByteHelper.ConcatinateArray(BitConverter.GetBytes(user.ID), new byte[] { (byte)((user.Online ? 128 : 0) + 64 + 32 + user.Name.Length) }, Encoding.Unicode.GetBytes(user.Name));
if (user.Online)
{
byte[] socketBytes = ByteHelper.ConcatinateArray(BitConverter.GetBytes(user.Socket.Port), user.Socket.Address.GetAddressBytes());
dataBytes = ByteHelper.ConcatinateArray(dataBytes, socketBytes);
}
return(dataBytes);
}
public static void TellMutualContactsAboutUserStatusChange(int userId)
{
List <int> contacts = DatabaseCommunication.GetOnlineContacts(userId);
if (contacts.Count != 0) // if the user has no online contacts, there is no need to do the rest.
{
byte[] contactStatusMessageBytes = CreateMutualContactStatusMessage(userId);
foreach (int contactId in contacts)
{
MessageToUser(contactId, ChatTwo_Protocol.MessageType.ContactStatus, contactStatusMessageBytes);
}
}
}
private void StatusUpdate_Click(object sender, EventArgs e)
{
bool worked = DatabaseCommunication.UpdateUser((int)numericUpDown1.Value, new System.Net.IPEndPoint(new System.Net.IPAddress(new byte[] { 10, 0, 0, 1 }), 9020));
if (worked)
{
WriteLog("user[" + (int)numericUpDown1.Value + "] Changed to online.", Color.Blue.ToArgb());
}
else
{
WriteLog("user[" + (int)numericUpDown1.Value + "] Does not exist.", Color.Red.ToArgb());
}
}
private void ReadUser_Click(object sender, EventArgs e)
{
UserObj user = DatabaseCommunication.ReadUser((int)numericUpDown1.Value);
if (user != null)
{
WriteLog(user.ToString(), Color.Purple.ToArgb());
}
else
{
WriteLog("user[" + (int)numericUpDown1.Value + "] Does not exist.", Color.Red.ToArgb());
}
}
private void CreateUser_Click(object sender, EventArgs e)
{
string hashedPassword = ByteHelper.GetHashString(Encoding.Unicode.GetBytes(textBox2.Text));
bool worked = DatabaseCommunication.CreateUser(textBox1.Text, hashedPassword);
if (worked)
{
WriteLog("user[\"" + textBox1.Text + "\"] Was created successfully.", Color.Blue.ToArgb());
}
else
{
WriteLog("user[\"" + textBox1.Text + "\"] Was not created.", Color.Red.ToArgb());
}
}
private void FormMain_FormClosing(object sender, FormClosingEventArgs e)
{
DialogResult reply = MessageBox.Show(this, "Are you sure you want to close the server?", "Close?", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
if (reply == DialogResult.No)
{
e.Cancel = true;
}
else
{
// Add closing of sockets and stuff here!
_server.Stop();
DatabaseCommunication.Disconnect();
}
}
private void btnSqlUpdate_Click(object sender, EventArgs e)
{
bool worked = DatabaseCommunication.UpdateDatabase(tbxSqlUser.Text, tbxSqlPassword.Text, tbxSqlAddress.Text, (int)nudSqlPort.Value);
if (worked)
{
tbxSql_ConnectionStringValuesChanged(null, null);
toolStripStatusLabel1.Text = "SQL database Updated";
btnSqlTest_Click(null, null);
}
else
{
WriteLog("Could not update the database.", Color.Red.ToArgb());
}
}
public static void SendAllContacts(int userId)
{
Dictionary <int, byte> contacts = DatabaseCommunication.GetAllContacts(userId);
foreach (KeyValuePair <int, byte> contact in contacts)
{
byte[] contactStatusMessageBytes;
if (contact.Value == 0x03) // 0b00000011
{
contactStatusMessageBytes = CreateMutualContactStatusMessage(contact.Key);
}
else
{
contactStatusMessageBytes = CreateNonMutualContactStatusMessage(contact.Key, ByteHelper.CheckBitCodeIndex(contact.Value, 0), ByteHelper.CheckBitCodeIndex(contact.Value, 1));
}
MessageToUser(userId, ChatTwo_Protocol.MessageType.ContactStatus, contactStatusMessageBytes);
}
}
public static byte[] CreateNonMutualContactStatusMessage(int userId, bool relationshipTo, bool relationshipFrom)
{
UserObj user;
if (_users.Any(x => x.ID == userId))
{
user = _users.Find(x => x.ID == userId);
}
else
{
user = DatabaseCommunication.ReadUser(userId);
}
byte[] dataBytes;
dataBytes = ByteHelper.ConcatinateArray(BitConverter.GetBytes(user.ID), new byte[] { (byte)((relationshipTo ? 64 : 0) + (relationshipFrom ? 32 : 0) + user.Name.Length) }, Encoding.Unicode.GetBytes(user.Name));
return(dataBytes);
}
private void btnSqlConnect_Click(object sender, EventArgs e)
{
tbxSqlUser.ReadOnly = !tbxSqlUser.ReadOnly;
tbxSqlPassword.ReadOnly = !tbxSqlPassword.ReadOnly;
tbxSqlAddress.ReadOnly = !tbxSqlAddress.ReadOnly;
nudSqlPort.Enabled = !nudSqlPort.Enabled;
btnSqlTest.Enabled = !btnSqlTest.Enabled;
if (DatabaseCommunication.Active)
{
DatabaseCommunication.Disconnect();
btnSqlConnect.Text = "Start Database Connection";
tabSqlTest.Parent = null;
}
else
{
DatabaseCommunication.Connect(tbxSqlUser.Text, tbxSqlPassword.Text, tbxSqlAddress.Text, (int)nudSqlPort.Value);
btnSqlConnect.Text = "Stop Database Connection";
tabSqlTest.Parent = tabControl1;
}
UpdateServerStatus();
}
public static void UserConnect(UserObj user)
{
DatabaseCommunication.UpdateUser(user.ID, user.Socket);
TellMutualContactsAboutUserStatusChange(user.ID);
SendAllContacts(user.ID);
}
public static void MessageReceivedHandler(object sender, PacketReceivedEventArgs args)
{
if (!DatabaseCommunication.Active)
#if DEBUG
{ throw new NotImplementedException("Database connection was not active and a reply for this have not been implemented yet."); }
// Need to add a simple debug message here, but this works as a great breakpoint until then.
// Also need to make some kind of error message I can send back to the client.
#else
{ return; }
#endif
if (args.Data[0] == 0x92)
{
string sharedSecret;
// Position of the Type byte is 30 (SignatureByteLength + MacByteLength + TimezByteLength + UserIdByteLength).
ChatTwo_Protocol.MessageType type = (ChatTwo_Protocol.MessageType)args.Data[ChatTwo_Protocol.SignatureByteLength + ByteHelper.HashByteLength + 4 + 4];
// Position of the UserID bytes is 26 (SignatureByteLength + MacByteLength + TimezByteLength) with a length of 4.
int userId = ByteHelper.ToInt32(args.Data, ChatTwo_Protocol.SignatureByteLength + ByteHelper.HashByteLength + 4);
if (type == ChatTwo_Protocol.MessageType.CreateUser)
{
sharedSecret = ChatTwo_Protocol.DefaultSharedSecret;
}
else if (type == ChatTwo_Protocol.MessageType.Login)
{
#if DEBUG
byte[] test = ByteHelper.SubArray(args.Data, ChatTwo_Protocol.SignatureByteLength + ByteHelper.HashByteLength + 4);
#endif
// Don't take the Timez as part of the sharedSecret. This is mostly because of a problem I have in the client where I make the sharedSecrt before I add the Timez.
sharedSecret = ByteHelper.GetHashString(ByteHelper.SubArray(args.Data, ChatTwo_Protocol.SignatureByteLength + ByteHelper.HashByteLength + 4));
}
else
{
if (!_users.Any(x => x.ID == userId))
{
return; // This is mostly to prevent clients with a connection to a previces server instants from crashing the server. Need to fix this.
}
sharedSecret = _users.Find(x => x.ID == userId).Secret;
}
if (ChatTwo_Protocol.ValidateMac(args.Data, sharedSecret))
{
Message message = ChatTwo_Protocol.MessageReceivedHandler(args);
switch (message.Type)
{
case ChatTwo_Protocol.MessageType.CreateUser:
{
string passwordHash = Convert.ToBase64String(message.Data, 0, ByteHelper.HashByteLength);
string username = Encoding.Unicode.GetString(ByteHelper.SubArray(message.Data, ByteHelper.HashByteLength));
if (username.Length < 1 || username.Length > 30)
{
// Username is too short or too long.
MessageToIp(message.Ip, ChatTwo_Protocol.MessageType.CreateUserReply, new byte[] { 0x02 });
return;
}
bool worked = DatabaseCommunication.CreateUser(username, passwordHash);
if (!worked)
{
// Some error prevented the user from being created. Best guess is that a user with that name already exist.
MessageToIp(message.Ip, ChatTwo_Protocol.MessageType.CreateUserReply, new byte[] { 0x01 });
return;
}
// Uesr creation was successful!
MessageToIp(message.Ip, ChatTwo_Protocol.MessageType.CreateUserReply, new byte[] { 0x00 });
break;
}
case ChatTwo_Protocol.MessageType.Login:
{
string passwordHash = Convert.ToBase64String(message.Data, 0, ByteHelper.HashByteLength);
string username = Encoding.Unicode.GetString(ByteHelper.SubArray(message.Data, ByteHelper.HashByteLength));
UserObj user = DatabaseCommunication.LoginUser(username, passwordHash);
if (user == null)
{
// Have to send back a LoginReply message here with a "wrong username/password" error.
_tempUsers.Add(message.Ip, sharedSecret);
MessageToIp(message.Ip, ChatTwo_Protocol.MessageType.LoginReply, new byte[] { 0x01 });
return;
}
if (_users.Any(x => x.ID == user.ID))
{
// Have to send back a LoginReply message here with a "User is already online" error.
_tempUsers.Add(message.Ip, sharedSecret);
MessageToIp(message.Ip, ChatTwo_Protocol.MessageType.LoginReply, new byte[] { 0x02 });
return;
}
user.Secret = sharedSecret;
user.Socket = message.Ip;
user.Online = true;
_users.Add(user);
MessageToUser(user.ID, ChatTwo_Protocol.MessageType.LoginReply, ByteHelper.ConcatinateArray(new byte[] { 0x00 }, BitConverter.GetBytes(user.ID)), user.Name);
UserConnect(user);
break;
}
case ChatTwo_Protocol.MessageType.Status:
{
UserObj user = _users.Find(x => x.ID == message.From);
if (user != null) // If the user is not found, don't do anything. (Can this happen?)
{
if (!IPEndPoint.Equals(user.Socket, message.Ip))
{
user.Socket = message.Ip;
// Message all contacts of the user with the new IP change.
TellMutualContactsAboutUserStatusChange(user.ID);
}
DatabaseCommunication.UpdateUser(user.ID, user.Socket);
}
break;
}
case ChatTwo_Protocol.MessageType.ContactRequest:
{
string username = Encoding.Unicode.GetString(message.Data);
UserObj user = DatabaseCommunication.LookupUser(username);
if (user == null)
{
// Have to send back a ContactRequestReply message here with a "No user with that name" error.
MessageToUser(message.From, ChatTwo_Protocol.MessageType.ContactRequestReply, new byte[] { 0x01 });
return;
}
if (user.ID == message.From)
{
// Have to send back a ContactRequestReply message here with a "You can't add your self" error.
MessageToUser(message.From, ChatTwo_Protocol.MessageType.ContactRequestReply, new byte[] { 0x02 });
return;
}
bool added = DatabaseCommunication.AddContact(message.From, user.ID);
if (!added)
{
// Have to send back a ContactRequestReply message here with a "User is already a contact" error.
MessageToUser(message.From, ChatTwo_Protocol.MessageType.ContactRequestReply, new byte[] { 0x03 });
return;
}
MessageToUser(message.From, ChatTwo_Protocol.MessageType.ContactRequestReply, new byte[] { 0x00 });
//if (_users.Any(x => x.ID == user.ID))
// TellContactsAboutUserStatusChange(message.From, true); // Need to figure this out.
break;
}
}
}
#if DEBUG
else
{
throw new NotImplementedException("Could not validate the MAC of the received message.");
}
// Need to add a simple debug message here, but this works as a great breakpoint until then.
#endif
}
#if DEBUG
else
{
throw new NotImplementedException("Could not validate the signature of the received message. The signature was \"0x" + args.Data[0] + "\" but only \"0x92\" is allowed.");
}
// Need to add a simple debug message here, but this works as a great breakpoint until then.
#endif
}
private void btnSqlTest_Click(object sender, EventArgs e)
{
tbxSql_ConnectionStringValuesChanged(null, null);
btnSqlTest.Enabled = false;
// Basic user feedback.
toolStripStatusLabel1.Text = "Testing connection and access to the database...";
statusStrip1.Refresh(); // Has to be done or the statusStrip won't display the new toolStripStatusLabel text.
// Test the connection and access, giving the user feedback if it fails.
DatabaseCommunication.ConnectionTestResult dbTest = DatabaseCommunication.TestConnection(tbxSqlUser.Text, tbxSqlPassword.Text, tbxSqlAddress.Text, (int)nudSqlPort.Value);
// Check the result of the connetion test.
bool connectTestSuccessful = dbTest == DatabaseCommunication.ConnectionTestResult.Successful;
if (connectTestSuccessful)
{
toolStripStatusLabel1.Text = "Database connection test: successful";
lblSqlConnection.Text = "Test: successful";
toolTip1.SetToolTip(lblSqlConnection, "");
btnSqlConnect.Enabled = true;
}
else
{
string errorMessage;
string errorTip;
switch (dbTest)
{
case DatabaseCommunication.ConnectionTestResult.NoConnection:
errorMessage = "Could not connect to the server at \"" + tbxSqlAddress.Text + ":" + (int)nudSqlPort.Value + "\"";
errorTip = "." + Environment.NewLine + Environment.NewLine +
"Please make sure the MySQL server is running and the IP address and port is correct.";
break;
case DatabaseCommunication.ConnectionTestResult.FailLogin:
errorMessage = "Login rejected by server";
errorTip = "." + Environment.NewLine + Environment.NewLine +
"Please make sure the username and password is correct.";
break;
case DatabaseCommunication.ConnectionTestResult.NoPermission:
errorMessage = "Permission failed for user";
errorTip = "." + Environment.NewLine + Environment.NewLine +
"Talk to the system admin to gain access to the MySQL server.";
break;
case DatabaseCommunication.ConnectionTestResult.MissingDatabase:
errorMessage = "Database does not exist";
errorTip = "." + Environment.NewLine + Environment.NewLine +
"You can create/repair the database by clicking the button below.";
btnSqlCreate.Enabled = true;
break;
case DatabaseCommunication.ConnectionTestResult.MissingTable:
errorMessage = "One or more of the tables do not exist";
errorTip = "." + Environment.NewLine + Environment.NewLine +
"You can create/repair the database by clicking the button below.";
btnSqlCreate.Enabled = true;
break;
case DatabaseCommunication.ConnectionTestResult.OutDated:
errorMessage = "SQL database need to be updated";
errorTip = ".";
btnSqlUpdate.Enabled = true;
break;
default:
errorMessage = "Unknown SQL error";
errorTip = ".";
break;
}
if (sender != null)
{
MessageBox.Show(errorMessage + errorTip, "SQL Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
toolStripStatusLabel1.Text = "Database connection test: failed. " + errorMessage;
lblSqlConnection.Text = "Test: failed";
lblSqlConnection.Image = _infoTip;
toolTip1.SetToolTip(lblSqlConnection, errorMessage + errorTip);
}
btnSqlTest.Enabled = true;
}
