public void CheckSubscription(Client client)
{
List <Subscription> subs = new List <Subscription>(client.ActiveSubscriptions);
foreach (Subscription sub in subs)
{
if (sub.ExpirationDateTime >= DateTime.Now)
{
client.ActiveSubscriptions.Remove(sub);
client.ExpiredSubscription.Add(sub);
PendingNotification notification = new PendingNotification()
{
ClientID = client.ID,
IPAddress = client.IpAddress.ToString(),
Port = client.Port,
NotificationType = NotificationType.SubscriptionExpired,
SubscriptionID = sub.ID
};
//send notification
try
{
Authentication auth = new Authentication(SocketType.Stream, AddressFamily.InterNetwork, ProtocolType.Tcp);
auth.NotifyServerSide(notification, client.IpAddress.ToString(), 50000);
}
catch (Exception)
{
_pendingNotifications.Add(notification);
}
}
}
}
public void NotifyServerSide(PendingNotification notification, string ipAdd, int port)
{
_addressFamily = AddressFamily.InterNetwork;
_ipAddress = IPAddress.Parse(ipAdd);
_ipEndPoint = new IPEndPoint(_ipAddress, port);
_socket = new Socket(_addressFamily, _socketType, _protocolType);
_socket.Connect(_ipEndPoint);
if (_socket == null)
{
throw new Exception("Socket is null");
}
//send command
string command = "NOTIFICATION";
_socket.Send(BitConverter.GetBytes(command.Length * 2));
_socket.Send(Encoding.Unicode.GetBytes(command));
byte[] status = new byte[4];
_socket.Receive(status);
if (Encoding.Unicode.GetString(status) == "OK")
{
MemoryStream ms = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(ms, notification);
byte[] buffer = ms.GetBuffer();
_socket.Send(BitConverter.GetBytes(buffer.Length));
_socket.Send(buffer);
_socket.Receive(status);
if (Encoding.Unicode.GetString(status) == "OK")
{
command = "TERMINATE";
_socket.Send(BitConverter.GetBytes(command.Length * 2));
_socket.Send(Encoding.Unicode.GetBytes(command));
}
}
}
public void NotifyClientSide(Socket socket)
{
byte[] ok = Encoding.Unicode.GetBytes("OK");
byte[] er = Encoding.Unicode.GetBytes("ER");
socket.Send(ok);
byte[] buffer = new byte[4];
socket.Receive(buffer);
buffer = new byte[BitConverter.ToInt32(buffer, 0)];
socket.Receive(buffer);
BinaryFormatter formatter = new BinaryFormatter();
PendingNotification notification = (PendingNotification)formatter.Deserialize(new MemoryStream(buffer));
socket.Send(ok);
_state.SetNotification(notification);
}
public void SetNotification(PendingNotification notification)
{
_pendingNotification = true;
_notifications.Add(notification);
}
