public UdpListener(MainWindow mainWindow)
{
this.users = new ArrayList();
this.localInfo = new UserInfo();
this.localInfo.getLocalInfo();
this.mainWindow = mainWindow;
}
public void addChat(UserInfo userInfo)
{
for (int i = 0; i < users.Count; ++i)
{
if (((UserInfo)users[i]).IP == userInfo.IP && ((UserInfo)users[i]).Port == userInfo.Port)
{
bool flag = false;
if (chats[i] == null)
{
flag = true;
}
else if (((ChatDialog)chats[i]).IsDisposed)
{
flag = true;
}
if (flag)
{
chats[i] = new ChatDialog((UserInfo)users[i]);
((ChatDialog)chats[i]).Show();
}
else
{
((ChatDialog)chats[i]).BringToFront();
}
break;
}
}
}
public UserInfoControl(UdpListener listener, UserInfo userInfo)
{
InitializeComponent();
this.listener = listener;
this.userInfo = userInfo;
this.labelHostName.Text = userInfo.Name;
this.labelAddress.Text = userInfo.IP + ":" + userInfo.Port;
}
public void addMessage(UserInfo userInfo)
{
for (int i = 0; i < users.Count; ++i)
{
if (((UserInfo)users[i]).IP == userInfo.IP && ((UserInfo)users[i]).Port == userInfo.Port)
{
bool flag = true;
if (chats[i] == null)
{
flag = false;
}
else if (((ChatDialog)chats[i]).IsDisposed)
{
flag = false;
}
if (flag)
{
((ChatDialog)chats[i]).appendReceive(userInfo.Name);
}
break;
}
}
}
public FileSender(UserInfo userInfo)
{
this.userInfo = userInfo;
}
public ChatDialog(UserInfo userInfo)
{
InitializeComponent();
this.userInfo = userInfo;
this.fileSender = new FileSender(userInfo);
}
private void listen()
{
IPEndPoint end = new IPEndPoint(IPAddress.Any, localInfo.Port);
Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 1000);
server.Bind(end);
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint remote = (EndPoint)sender;
while (this.isListen)
{
byte[] bytes = new byte[1024];
try
{
int recv = server.ReceiveFrom(bytes, ref remote);
string rstr = Encoding.UTF8.GetString(bytes, 0, recv);
UserInfo info = new UserInfo();
string[] strs = rstr.Substring(4).Split(new char[1]{'\0'});
info.Name = strs[0];
info.IP = remote.ToString().Split(new char[1] { ':' })[0];
info.Port = Int32.Parse(strs[1]);
if (rstr.Substring(0, 4).Equals("SCAN"))
{
this.addUser(info);
string send = "SCAN" + localInfo.Name + "\0" + localInfo.Port;
bytes = Encoding.UTF8.GetBytes(send);
server.SendTo(bytes, bytes.Length, SocketFlags.None, remote);
}
else if (rstr.Substring(0, 4).Equals("MESS"))
{
this.addMessage(info);
}
else if (rstr.Substring(0, 4).Equals("FISE"))
{
this.sendFileRequest(info);
}
else if (rstr.Substring(0, 4).Equals("FIRE"))
{
this.receiveFile(info);
}
}
catch
{
}
}
server.Close();
}
public void sendFileRequest(UserInfo userInfo)
{
for (int i = 0; i < users.Count; ++i)
{
if (((UserInfo)users[i]).IP == userInfo.IP && ((UserInfo)users[i]).Port == userInfo.Port)
{
bool flag = true;
if (chats[i] == null)
{
flag = false;
}
else if (((ChatDialog)chats[i]).IsDisposed)
{
flag = false;
}
if (flag)
{
string[] strs = userInfo.Name.Split(new char[1] { '/' });
if (strs.Length == 2)
{
string fileName = strs[0];
long size = Int64.Parse(strs[1]);
((ChatDialog)chats[i]).sendFileRequest(fileName, size);
}
}
break;
}
}
}
public void receiveFile(UserInfo userInfo)
{
for (int i = 0; i < users.Count; ++i)
{
if (((UserInfo)users[i]).IP == userInfo.IP && ((UserInfo)users[i]).Port == userInfo.Port)
{
bool flag = true;
if (chats[i] == null)
{
flag = false;
}
else if (((ChatDialog)chats[i]).IsDisposed)
{
flag = false;
}
if (flag)
{
int port = Int32.Parse(userInfo.Name);
((ChatDialog)chats[i]).receiveFileRequest(port);
}
break;
}
}
}
public void addUser(UserInfo userInfo)
{
for (int i = 0; i < users.Count; ++i)
{
if (((UserInfo)users[i]).IP == userInfo.IP && ((UserInfo)users[i]).Port == userInfo.Port)
{
return;
}
}
users.Add(userInfo);
chats.Add(null);
this.mainWindow.addUserControl(new UserInfoControl(this, userInfo));
}
private void scanUser(IPAddr ipAddr)
{
string send = "SCAN" + listener.localInfo.Name + "\0" + listener.localInfo.Port;
IPEndPoint ip = new IPEndPoint(IPAddress.Parse(ipAddr.ToString()), this.port);
Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
byte[] bytes = Encoding.UTF8.GetBytes(send);
server.SendTo(bytes, ip);
bytes = new byte[1024];
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint remote = (EndPoint)sender;
server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, 1000);
try
{
int recv = server.ReceiveFrom(bytes, ref remote);
if (recv >= 4)
{
UserInfo info = new UserInfo();
string[] strs = Encoding.UTF8.GetString(bytes, 0, recv).Substring(4).Split(new char[1] { '\0' });
info.Name = strs[0];
info.IP = ipAddr.ToString();
info.Port = this.port;
lock (listener)
{
listener.addUser(info);
}
}
}
catch
{
}
server.Close();
}
