Презентация на тему "Сокеты"

Содержание

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  .NET Socket

  Сергеев Николай КБ-401

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  Со́кеты (англ. socket — углубление, гнездо, разъём) — программный интерфейс для обеспечения обмена данными между процессами.

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  Сокет Беркли Серверные Клиентские

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  System.Net

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  System.Net.Sockets

  Windows Sockets Дуплексное взаимодействие

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  Socket

  Синхронная передача Асинхронная передача

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  Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

  Конструктор

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  Асинхронные методы

  ConnectAsync  SendAsync  ReceiveAsync  Shutdown  Close 

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  SocketAsyncEventArgs

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  … SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.google.com", 80); socketEventArg.Completed += new EventHandler(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); …

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  … SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.google.com", 80); socketEventArg.Completed += new EventHandler(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); ...

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  … SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.google.com", 80); socketEventArg.Completed += new EventHandler(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); …

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  … SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.google.com", 80); socketEventArg.Completed += new EventHandler(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); …

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  Функция обратного вызова

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  … SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.google.com", 80); socketEventArg.Completed += new EventHandler(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); …

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  … SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.google.com", 80); socketEventArg.Completed += new EventHandler(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); …

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  … SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.google.com", 80); socketEventArg.Completed += new EventHandler(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); …

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  CallBack

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  private static void ProcessConnect(SocketAsyncEventArgs e) { … byte[] buffer = Encoding.UTF8.GetBytes("Hello World"); e.SetBuffer(buffer, 0, buffer.Length); Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.SendAsync(e); if (!willRaiseEvent) { ProcessSend(e); } … }

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  private static void ProcessConnect(SocketAsyncEventArgs e) { … byte[] buffer = Encoding.UTF8.GetBytes("Hello World"); e.SetBuffer(buffer, 0, buffer.Length); Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.SendAsync(e); if (!willRaiseEvent) { ProcessSend(e); } … }

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  private static void ProcessConnect(SocketAsyncEventArgs e) { … byte[] buffer = Encoding.UTF8.GetBytes("Hello World"); e.SetBuffer(buffer, 0, buffer.Length); Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.SendAsync(e); if (!willRaiseEvent) { ProcessSend(e); } … }

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  private static void ProcessConnect(SocketAsyncEventArgs e) { … byte[] buffer = Encoding.UTF8.GetBytes("Hello World"); e.SetBuffer(buffer, 0, buffer.Length); Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.SendAsync(e); if (!willRaiseEvent) { ProcessSend(e); } … }

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  private static void ProcessConnect(SocketAsyncEventArgs e) { … byte[] buffer = Encoding.UTF8.GetBytes("Hello World"); e.SetBuffer(buffer, 0, buffer.Length); Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.SendAsync(e); if (!willRaiseEvent) { ProcessSend(e); } … }

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  private static void ProcessConnect(SocketAsyncEventArgs e) { … byte[] buffer = Encoding.UTF8.GetBytes("Hello World"); e.SetBuffer(buffer, 0, buffer.Length); Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.SendAsync(e); if (!willRaiseEvent) { ProcessSend(e); } … }

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  private static void ProcessSend(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.ReceiveAsync(e); if (!willRaiseEvent) { ProcessReceive(e); } … }

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  private static void ProcessSend(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.ReceiveAsync(e); if (!willRaiseEvent) { ProcessReceive(e); } … }

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  private static void ProcessSend(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.ReceiveAsync(e); if (!willRaiseEvent) { ProcessReceive(e); } … }

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  private static void ProcessSend(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; boolwillRaiseEvent = sock.ReceiveAsync(e); if (!willRaiseEvent) { ProcessReceive(e); } … }

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  static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect(e); break; case SocketAsyncOperation.Receive: ProcessReceive(e); break; case SocketAsyncOperation.Send: ProcessSend(e); break; default: throw new Exception("Invalid operation completed"); } }

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  private static void ProcessReceive(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; sock.Shutdown(SocketShutdown.Send); sock.Close(); … }

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  private static void ProcessReceive(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; sock.Shutdown(SocketShutdown.Send); sock.Close(); … }

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  private static void ProcessReceive(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; sock.Shutdown(SocketShutdown.Send); sock.Close(); … }

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  private static void ProcessReceive(SocketAsyncEventArgs e) { … Socket sock = e.UserToken as Socket; sock.Shutdown(SocketShutdown.Send); sock.Close(); … }

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  Этапы выполнения асинхронной операции Выделите  SocketAsyncEventArgs Задайте свойства объекта SocketAsyncEventArgs, Вызовите соответствующий метод сокета. Функции обратного вызова сделайте запрос состояния завершения и результатов операций. Повторно используйте объект SocketAsyncEventArgs для другой операции.

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  Спасибо за внимание!