static void Main(string[] args)
{
TcpListener tcpListener, timerListener;
IPAddress localAddr = IPAddress.Parse("127.0.0.1");
tcpListener = new TcpListener(localAddr, 3333);
tcpListener.Start();
timerListener = new TcpListener(localAddr, 3334);
timerListener.Start();
Console.WriteLine("Waiting for connections... ");
TcpClient client = tcpListener.AcceptTcpClient();
TcpClient timerClient = timerListener.AcceptTcpClient();
Console.WriteLine("Client connected. ");
NetworkStream netStream, timerStream;
TimerCallback timerCallback = new TimerCallback(SendTime);
Timer timer = new Timer(timerCallback, null, 0, 1000);
while (true)
{
Console.WriteLine("Waiting for requests...");
netStream = client.GetStream();
byte[] data = new byte[256];
//int bytes = netStream.Read(data, 0, data.Length);
BinaryFormatter formatter = new BinaryFormatter();
Request request = (Request)formatter.Deserialize(netStream);
if (request is RequestFile)
{
RequestFile req = (RequestFile)request;
byte[] response = Tasks.ReadBlock(req.FileName, req.Offset, req.Length);
netStream.Write(response, 0, response.Length);
Console.WriteLine("Sended {0} bytes from {1}", response.Length, req.FileName);
}
else if (request is RequestDisconnect)
{
timer.Dispose();
netStream.Close();
client.Close();
break;
}
}
Console.WriteLine("\nPress <Enter> to terminate the server.");
Console.ReadLine();
void SendTime(object obj)
{
timerStream = timerClient.GetStream();
byte[] data = Tasks.GetTime();
timerStream.WriteAsync(data, 0, data.Length);
}
}
//every client runs on its own thread.
//File send and receives also runs on its own thread. this is to keep GUI responsive.
private void recvMessage(object s)
{
ConnectedClient client = (ConnectedClient)s;
bool bRecvMessage = true;
while (bRecvMessage)
{
try
{
nBuffer buffer = new nBuffer();
int ReadBytes;
if ((ReadBytes = buffer.ReceiveCryptoBuffer(client.socket, client.CC.Salt)) > 0)
{
#region RecvClientSettings
if (buffer.GetID() == MsgType.ClientSettings)
{
Console.WriteLine(client.socket.RemoteEndPoint.ToString() + ": Received Client settings");
ClientSettings CSettings;
CSettings = buffer.GetObject <ClientSettings>();
CSettings.Ip = client.CC.Ip;
bool InGroupList = false;
for (int i = 0; i < ConnectedClients.Count(); i++)
{
if (ConnectedClients[i].CC.Ip == client.CC.Ip)
{
Console.WriteLine(ConnectedClients[i].Name + " Renamed to: " + CSettings.Name);
ConnectedClients[i].Name = CSettings.Name;
}
}
client.Groups = CSettings.Groups;
string[] tmpGroups = CSettings.Groups.Split(';');
foreach (string group in tmpGroups)
{
if (group != "")
{
InGroupList = false;
for (int i = 0; i < ChatGroupsContainer.Instance.Count; i++)
{
if (group == ChatGroupsContainer.Instance.at(i).GroupName)
{
InGroupList = true; // group is already in chatrgrouplist,
}
}
if (!InGroupList)
{
ChatGroup cGroup = new ChatGroup();
cGroup.GroupName = group;
ChatGroupsContainer.Instance.Add(cGroup);
AddGroupToDataGridview(cGroup);
Console.WriteLine("Group " + group + " Added to List");
}
// check if user is in group, else add it, and check if name updated;
for (int i = 0; i < ChatGroupsContainer.Instance.Count; i++)
{
bool UserInList = false;
if (ChatGroupsContainer.Instance.at(i).GroupName == group)
{
for (int j = 0; j < ChatGroupsContainer.Instance.at(i).Members.Count; j++)
{
if (ChatGroupsContainer.Instance.at(i).Members[j].Ip == CSettings.Ip) // Member is in list
{
UserInList = true;
ChatGroupsContainer.Instance.at(i).Members[j].Name = CSettings.Name; // update name.
}
}
if (!UserInList)
{
ChatGroupsContainer.Instance.at(i).Members.Add(CSettings);
Console.WriteLine(CSettings.Name + " Added to: " + ChatGroupsContainer.Instance.at(i).GroupName);
}
}
}
}
}
// check all groups if it has the user, if it does, check if the user has specified the group, else delete it from that group
for (int j = 0; j < ChatGroupsContainer.Instance.Count; j++)
{
bool UserInGroup = false;
bool UserSpecifiedGroup = false;
int IndexOfUser = -1;
for (int i = 0; i < ChatGroupsContainer.Instance.WholeList[j].Members.Count; i++)
{
if (ChatGroupsContainer.Instance.at(j).Members[i].Ip == CSettings.Ip) // client is in the group
{
UserInGroup = true;
foreach (string Cgroups in tmpGroups) // check if groupname is also specified by teh client;
{
if (Cgroups == ChatGroupsContainer.Instance.at(j).GroupName)
{
UserSpecifiedGroup = true;
}
}
if (!UserSpecifiedGroup)
{
IndexOfUser = i;
}
}
}
if (UserInGroup && !UserSpecifiedGroup) // user is in chatgroup but not specified in tmpgroups.
{
ChatGroupsContainer.Instance.at(j).Members.RemoveAt(IndexOfUser);
}
}
UpdateClientList();
}
#endregion
#region RecvTextMessage
if (buffer.GetID() == MsgType.TextMessage)
{
Console.WriteLine(client.socket.RemoteEndPoint.ToString() + ": Received TextMessage");
TextMessage TM = buffer.GetObject <TextMessage>();
PassMessage(TM);
if (LogChatMessages.Checked)
{
MessageLogger.LOG(TM, ChatGroupsContainer.Instance.WholeList);
}
}
#endregion
#region FileRecv/Send
if (buffer.GetID() == MsgType.SendFile) // Server Receives file
{
PrepareFileSend PFS = buffer.GetObject <PrepareFileSend>();
Console.WriteLine(client.socket.RemoteEndPoint.ToString() + ": Send File -> " + PFS.FileName + PFS.Ext);
buffer.innerbuffer.Clear();
buffer.ReceiveCryptoFileBuffer(client.socket, client.CC.Salt);
ServerFile SF = buffer.GetObject <ServerFile>(0);
// Encrypt current password into file;
byte[] Passwordbytes = Crypt.Base64Encode(BinaryFilesPassword);
byte[] binaryfile = new byte[Passwordbytes.Length + SF.BinaryFile.Length];
Buffer.BlockCopy(Passwordbytes, 0, binaryfile, 0, Passwordbytes.Length);
Buffer.BlockCopy(SF.BinaryFile, 0, binaryfile, Passwordbytes.Length, SF.BinaryFile.Length); // copy binary file;
binaryfile = Crypt.Encrypt(binaryfile, BinaryFilesKey, BinaryFilesPassword); // encrypt file and store it.
string Path = Utils.AssemblyDirectory + "\\" + PFS.FileName + PFS.Ext + ".scbd";
FileStream fs = null;
if (File.Exists(Path))
{
fs = new FileStream(Path, FileMode.Truncate, FileAccess.ReadWrite); // overwrite file
}
else
{
fs = new FileStream(Path, FileMode.OpenOrCreate, FileAccess.ReadWrite); // create new;
}
if (fs.CanWrite)
{
fs.Write(binaryfile, 0, binaryfile.Length);
}
fs.Close();
fs.Dispose();
SF.length = binaryfile.Length;
SF.Ext = PFS.Ext;
binaryfile = null;
// now we need to notify clients that there is a file for them.
TextMessage TM = new TextMessage();
TM.To = PFS.to;
TM.From = PFS.from;
TM.ID = ChatBufferMessageType.Link;
TM.Message = PFS.FileName + PFS.Ext;
PassMessage(TM);
buffer.innerbuffer.Clear();
buffer.AddID(MsgType.FileSendComplete);
FileSendComplete FSC = new FileSendComplete();
FSC.complete = true;
buffer.AddObject(FSC);
buffer.SendCryptoBuffer(client.socket, client.CC.Salt);
}
#endregion
#region File Request Awsering
if (buffer.GetID() == MsgType.RequestFile) // Client requests file from server
{
bool NoFile = true;
RequestFile RF = buffer.GetObject <RequestFile>();
Console.WriteLine(client.socket.RemoteEndPoint.ToString() + ": Request File -> " + RF.Name);
buffer.innerbuffer.Clear();
byte[] binaryfile = new byte[] { };
string Path = Utils.AssemblyDirectory + "\\" + RF.Name + ".scbd";
if (File.Exists(Path))
{
binaryfile = Crypt.Decrypt(File.ReadAllBytes(Path), BinaryFilesKey, BinaryFilesPassword);
byte[] passwordbytes = Crypt.Base64Encode(BinaryFilesPassword); // get bytes of password
byte[] binarypasswordfromfile = new byte[passwordbytes.Length]; // allocate bytes
try
{
// copy length of of current password from binrayfile on disk;
Buffer.BlockCopy(binaryfile, 0, binarypasswordfromfile, 0, binarypasswordfromfile.Length);
string DecodedBinaryPassword = Crypt.Base64Decode(binarypasswordfromfile); // decode password
if (DecodedBinaryPassword == BinaryFilesPassword) // password from file is the same as current password;
{
Buffer.BlockCopy(binaryfile, passwordbytes.Length, binaryfile, 0, binaryfile.Length - passwordbytes.Length);
}
else // password was longer/smaller or same length but different chars.
{
Console.WriteLine("Encrypted password does not match current password, file could not be send to user : "******"Failed to Decrypt file from disk");
Console.WriteLine(ex.Message + "/n/r " + ex.StackTrace);
}
NoFile = false;
PrepareFileSend PFS = new PrepareFileSend();
PFS.filesize = binaryfile.Length;
PFS.FileName = RF.Name;
PFS.ACK = 0;
buffer.AddID(MsgType.SendFile);
buffer.AddObject(PFS);
buffer.SendCryptoBuffer(client.socket, client.CC.Salt);
buffer.innerbuffer.Clear();
buffer.CryptoSize = 0;
buffer.ReceiveCryptoBuffer(client.socket, client.CC.Salt);
if (buffer.GetID() == MsgType.SendOK)
{
buffer.innerbuffer.Clear();
ServerFile serverfile = new ServerFile();
string[] splitname = RF.Name.Split('.');
serverfile.Name = splitname[0]; // name
serverfile.Ext = splitname[1]; // extension
serverfile.BinaryFile = binaryfile; // decrypt file to send it.
binaryfile = null;
buffer.AddObject(serverfile);
Console.WriteLine("Server : " + buffer.SendCryptoBuffer(client.socket, client.CC.Salt) + " bytess of " + RF.Name + " send!");
buffer.innerbuffer.Clear();
}
}
if (NoFile)
{
PrepareFileSend PFS = new PrepareFileSend();
PFS.filesize = -1;
PFS.FileName = RF.Name;
PFS.ACK = 0;
buffer.AddID(MsgType.Nofile);
buffer.AddObject(PFS);
buffer.SendCryptoBuffer(client.socket, client.CC.Salt);
buffer.innerbuffer.Clear();
Thread.Sleep(10);
}
}
#endregion
#region Reguest Logo
if (buffer.GetID() == MsgType.RequestLogo)
{
if (Logo == null)
{
buffer.innerbuffer.Clear();
buffer.AddID(MsgType.NoLogo);
buffer.SendCryptoBuffer(client.socket, client.CC.Salt);
}
else
{
buffer.innerbuffer.Clear();
buffer.AddID(MsgType.Logo);
buffer.AddObject(Logo);
buffer.SendCryptoBuffer(client.socket, client.CC.Salt);
}
}
#endregion
}
else
{
for (int i = 0; i < ConnectedClients.Count(); i++)
{
if (ConnectedClients[i].socket == client.socket)
{
if (client.CC.Ip == ConnectedClients[i].CC.Ip && client.CC.sockettype != ConnectionType.Client) // or delete if FileSocket.
{
ConnectedClients[i].socket.Shutdown(SocketShutdown.Both);
ConnectedClients[i].socket.Close(1);
ConnectedClients.RemoveAt(i);
Console.WriteLine("Socket of Type {0} Disconnected!", client.CC.sockettype);
bRecvMessage = false;
return;
}
client.socket.Shutdown(SocketShutdown.Both);
client.socket.Close(1);
client.socket = null;
client.Online = false;
bRecvMessage = false;
Console.WriteLine("Client {0} of Type {1} Disconnected!", client.CC.Ip, client.CC.sockettype);
UpdateClientList();
return;
}
}
// if (ConnectedClients[index].CC.sockettype != ConnectionType.File) // only update clientlist if socket is not a filesocket.
// UpdateClientList();
}
}
catch (Exception e)
{
for (int i = 0; i < ConnectedClients.Count(); i++)
{
if (client.socket == ConnectedClients[i].socket)
{
Console.WriteLine(ConnectedClients[i].CC.Ip + " " + e.Message + "\r\n Disconnected");
if (i < ConnectedClients.Count())
{
/*
* ConnectedClients[i].Online = false;
* ConnectedClients[i].socket = null;
* ConnectedClients[i].IsRunning = false;
*/
client.socket.Shutdown(SocketShutdown.Both);
client.socket.Close(1);
client.socket = null;
client.Online = false;
bRecvMessage = false;
}
}
}
}
}
}