/// <summary>
/// Send a message to a peer still connected.
/// </summary>
/// <param name="Message">Message in String(UTF16 encode only).</param>
/// <param name="PeerIP">IP:Port</param>
/// <returns>If return False the sending is failed.</returns>
public static void Send(string Message, string PeerIP)
{
Thread t = new Thread(new ParameterizedThreadStart(delegate
{
// convert the UTF16 to Byte[]
byte[] Message_Byte = new byte[Message.Length * 2];
Message_Byte = ASCIIEncoding.Unicode.GetBytes(Message);
PeersList.Peer peer = PeersList.GetPeerByIP(PeerIP);
try
{
NetworkStream stream = peer.Client.GetStream();
stream.Write((byte[])Message_Byte, 0, ((byte[])Message_Byte).Length);
}
catch
{
// remove the peer
PeersList.RemovePeer(PeerIP);
Debug.WriteLine("A message hasn't been sent, probably the peer is offline or disconnected", "Error");
//MessageBox.Show("ERROR: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); // DEBUG
}
}));
t.Name = "MessageSender";
t.IsBackground = true;
t.Start();
}
/// <summary>
/// Send a message to a peer still connected ( USE THIS FOR SENDING MESSAGE WITH BINARY PARTS )
/// </summary>
/// <param name="IMessage">Message in IMessage interface.</param>
/// <param name="PeerIP">IP:Port</param>
/// <returns>If return False the sending is failed.</returns>
public static void Send(Messages.IMessage IMessage, string PeerIP)
{
byte[] Message_Byte = IMessage.MessageByte;
PeersList.Peer peer = PeersList.GetPeerByIP(PeerIP);
try
{
NetworkStream stream = peer.Client.GetStream();
stream.Write((byte[])Message_Byte, 0, ((byte[])Message_Byte).Length);
}
catch
{
// remove the peer
PeersList.RemovePeer(PeerIP);
Debug.WriteLine("A message hasn't been sent, probably the peer is offline or disconnected", "Error");
//MessageBox.Show("ERROR: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); // DEBUG
}
}
/// <summary>
/// Send a Tcp connection request to a new peer.
/// </summary>
/// <param name="Message">The request message ( byte[] or string in UTF16 format ).</param>
/// <param name="PeerIP">The IP address of the new peer.</param>
public static void SendConnectionRequest(object Message, string PeerIP)
{
Thread t = new Thread(new ParameterizedThreadStart(delegate
{
if (Message.GetType().ToString() != "System.String" && Message.GetType().ToString() != "System.Byte[]")
{
throw new System.ArgumentException("The message format is invalid", "Message");
}
// if necessary converts the UTF16 to Byte[]
if (Message.GetType().ToString() == "System.String")
{
Message = ASCIIEncoding.Unicode.GetBytes((string)Message);
}
try
{
// connect to peer
TcpClient client = new TcpClient();
client.Connect(PeerIP.Split(':')[0], int.Parse(PeerIP.Split(':')[1]));
// get stream
NetworkStream stream = client.GetStream();
// send the request
stream.Write((byte[])Message, 0, ((byte[])Message).Length);
// wait a reply
System.Timers.Timer timer = new System.Timers.Timer(15000);
timer.Elapsed += new ElapsedEventHandler(delegate { Thread.CurrentThread.Abort(); });
timer.Enabled = true;
byte[] reply_byte = new byte[3072];
stream.Read(reply_byte, 0, reply_byte.Length);
string reply = ASCIIEncoding.Unicode.GetString(reply_byte);
string[] sub_reply = reply.Split('\n');
// if the peer have accepted the connection request...
if (sub_reply[0].Substring(0, 4) == "Nova" && sub_reply[1].Substring(0, 10) == "CONNECT_OK")
{
Debug.WriteLine("Connection established with " + PeerIP, "Connection established");
// create a new PeersList.Peer()
PeersList.Peer peer = new PeersList.Peer();
peer.IP = PeerIP;
peer.Client = client;
peer.Stream = stream;
peer.ID = "";
// add the peer in the PeersList()
PeersList.AddPeer(peer);
}
else
{
stream.Close();
client.Close();
}
timer.Close();
}
catch
{
Debug.WriteLine("A message hasn't been sent, probably the peer is offline or disconnected", "Error");
}
}));
t.Name = "MessageSender_Request_Connection_Sending";
t.IsBackground = true;
t.Start();
}
/// <summary>
/// Build a new XML_List with all the peers are contained in the PeersList.
/// </summary>
public static void Build_XML_List()
{
XmlDocument list = new XmlDocument();
list.LoadXml("<Peers></Peers>");
for (int i = 0; i < PeersList.Count; i++)
{
PeersList.Peer peer = (PeersList.Peer)PeersList.List[i];
if (peer.ID != "" && peer.ID != null)
{
XmlElement XE_peer = list.CreateElement(peer.ID);
list.DocumentElement.AppendChild(XE_peer);
XmlElement peer_IP = list.CreateElement("IP");
peer_IP.InnerText = peer.IP;
XE_peer.AppendChild(peer_IP);
XmlElement peer_time = list.CreateElement("Time");
peer_time.InnerText = peer.Date.ToString();
XE_peer.AppendChild(peer_time);
XmlElement peer_files = list.CreateElement("Files");
try
{
//foreach (PeersList.Peer.File file in peer.Files)
for (int j = 0; j < peer.Files.Count; j++)
{
PeersList.Peer.File file = (PeersList.Peer.File)peer.Files[j];
XmlElement file_sha = list.CreateElement(file.SHA1);
XmlElement file_name = list.CreateElement("Name");
file_name.InnerText = file.Name;
file_sha.AppendChild(file_name);
XmlElement file_size = list.CreateElement("Size");
file_size.InnerText = file.Size.ToString();
file_sha.AppendChild(file_size);
peer_files.AppendChild(file_sha);
}
}
catch
{
}
XE_peer.AppendChild(peer_files);
}
}
// save the list
XmlTextWriter writer = new XmlTextWriter("List.xml", null);
writer.Formatting = Formatting.Indented;
while (true)
{
try
{
list.Save(writer);
writer.Flush();
writer.Close();
return;
}
catch
{
Thread.Sleep(5);
}
}
}
/// <summary>
/// Send a Tcp connection request to a new peer.
/// </summary>
/// <param name="Message">The request message ( byte[] or string in UTF16 format ).</param>
/// <param name="PeerIP">The IP address of the new peer.</param>
public static void SendConnectionRequest(object Message, string PeerIP)
{
Thread t = new Thread(new ParameterizedThreadStart(delegate
{
if (Message.GetType().ToString() != "System.String" && Message.GetType().ToString() != "System.Byte[]")
{
throw new System.ArgumentException("The message format is invalid", "Message");
}
// if necessary converts the UTF16 to Byte[]
if (Message.GetType().ToString() == "System.String")
{
Message = ASCIIEncoding.Unicode.GetBytes((string)Message);
}
try
{
// connect to peer
TcpClient client = new TcpClient();
client.Connect(PeerIP.Split(':')[0], int.Parse(PeerIP.Split(':')[1]));
// get stream
NetworkStream stream = client.GetStream();
// send the request
stream.Write((byte[])Message, 0, ((byte[])Message).Length);
// wait a reply
System.Timers.Timer timer = new System.Timers.Timer(15000);
timer.Elapsed += new ElapsedEventHandler(delegate { Thread.CurrentThread.Abort(); });
timer.Enabled = true;
byte[] reply_byte = new byte[3072];
stream.Read(reply_byte, 0, reply_byte.Length);
string reply = ASCIIEncoding.Unicode.GetString(reply_byte);
string[] sub_reply = reply.Split('\n');
// if the peer have accepted the connection request...
if (sub_reply[0].Substring(0, 4) == "Nova" && sub_reply[1].Substring(0, 10) == "CONNECT_OK")
{
Debug.WriteLine("Connection established with " + PeerIP, "Connection established");
// create a new PeersList.Peer()
PeersList.Peer peer = new PeersList.Peer();
peer.IP = PeerIP;
peer.Client = client;
peer.Stream = stream;
peer.ID = "";
// add the peer in the PeersList()
PeersList.AddPeer(peer);
}
else
{
stream.Close();
client.Close();
}
timer.Close();
}
catch
{
Debug.WriteLine("A message hasn't been sent, probably the peer is offline or disconnected", "Error");
}
}));
t.Name = "MessageSender_Request_Connection_Sending";
t.IsBackground = true;
t.Start();
}
