private void listView1_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
if (listView1.FocusedItem.Bounds.Contains(e.Location))
{
string currId = listView1.FocusedItem.SubItems[1].Text;
if (Program.nodes.ContainsKey(currId))
{
BeaconNode node = Program.nodes[currId];
string id = Interaction.InputBox("Enter new ID for " + node.macAddress, "Change ID", node.id, -1, -1);
if (id.Length == 0)
{
// user cancelled
}
else if (Program.HasId(node.ipAddress, id))
{
MessageBox.Show("ID " + id + " already exist!", "ID collision", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else
{
node.id = "pending-set";
Program.blockedIds.Add(id);
node.tempId = id;
}
}
}
}
}
/// <summary>
/// Build the response needs to be send to the given node
/// </summary>
/// <param name="ip"></param>
/// <param name="node"></param>
/// <returns></returns>
private static byte[] BuildManagementFrame(string ip, BeaconNode node)
{
string managementFrame = "OK";
if ("not-set".Equals(node.id) || "pending-set".Equals(node.id)) // if client id is in not-set status, we need to tell an id
{
if (node.tempId == null)
{
node.tempId = Program.GetNewID(node.ipAddress).ToString();
}
managementFrame = "ID:" + node.tempId;
}
return(Encoding.ASCII.GetBytes(managementFrame));
}
/// <summary>
/// Listner thread's method
/// </summary>
private static void DoListen()
{
byte[] data = new byte[1024];
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9091); // start listnening on port
newsock = new UdpClient(ipep);
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0); // empty sender is needed as reference to catch senders information
/*
* //TODO: New thread with client
* Thread clientThread = new Thread(new ParameterizedThreadStart(DoClient));
* clientThread.Start(client);
*/
while (active)
{
Console.WriteLine("Waiting for a client...");
data = newsock.Receive(ref sender); // here we wait until a message of node comes
string port = sender.ToString(); // node's ip details
string ip = port.Split(':')[0];
Console.WriteLine("Connected {0}:", port);
if (ip.Count(f => f == '.').Equals(3)) // if node does not provides a valid ip address do nothing
{
if (!nodes.ContainsKey(ip)) // if we don't have a node object for this ip
{
Console.WriteLine("Creating new node for {0}", ip);
nodes.Add(ip, new BeaconNode(ip)); // create new one and add to the node list
}
BeaconNode node = nodes[ip]; // take the relevant node from the list
ParseFrame(node, data); // ask to extract information from data buffer and update fields in node object
data = BuildManagementFrame(ip, node); // ask to build the response needs to be send to the given node
newsock.Send(data, data.Length, sender); // send server response
}
}
newsock.Close();
}
/// <summary>
/// Extract information from data buffer and update fields in node object
/// </summary>
/// <param name="node"></param>
/// <param name="frame"></param>
private static void ParseFrame(BeaconNode node, byte[] frame)
{
string stringFrame = Encoding.ASCII.GetString(frame, 0, frame.Length); // can use ASCII or UTF8
Console.WriteLine(stringFrame);
string[] tokens = stringFrame.Split('`'); // comming data seperated by :
node.lastPing = DateTime.Now;
node.offline = false;
node.status = tokens[0];
if ("pending-set".Equals(node.id) && node.tempId != tokens[1])
{
// still node haven't picked the given id.
}
else
{
if (("pending-set".Equals(node.id) || "not-set".Equals(node.id)) && node.tempId == tokens[1])
{
// node just picked the given id
node.id = tokens[1];
string[] ids = new string[Properties.Settings.Default.ids.Count];
Properties.Settings.Default.ids.CopyTo(ids, 0);
foreach (string s in ids)
{
if (s.StartsWith(node.ipAddress))
{
Properties.Settings.Default.ids.Remove(s);
}
}
Properties.Settings.Default.ids.Add(node.ipAddress + ":" + node.id);
Properties.Settings.Default.Save();
blockedIds.RemoveAll(s => s == node.id);
}
else // regular id update
{
node.id = tokens[1];
if (!HasReserved(node.ipAddress, node.id))
{
if (Properties.Settings.Default.ids != null)
{
string[] ids = new string[Properties.Settings.Default.ids.Count];
Properties.Settings.Default.ids.CopyTo(ids, 0);
foreach (string s in ids)
{
if (s.StartsWith(node.ipAddress))
{
Properties.Settings.Default.ids.Remove(s);
}
}
Properties.Settings.Default.ids.Add(node.ipAddress + ":" + node.id);
Properties.Settings.Default.Save();
}
}
}
}
node.upTimeMinutes = int.Parse(tokens[2]);
node.batteryLevel = int.Parse(tokens[3]);
node.macAddress = tokens[4];
string data = tokens[5];
log = DateTime.Now.ToLongTimeString() + ": " + node.macAddress + " says it has discovered " + data + Environment.NewLine + log;
}
