First Commit

For Azeroth!

dep/acelite/ace/Asynch_Connector.h

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+/* -*- C++ -*- */
+
+//=============================================================================
+/**
+ *  @file    Asynch_Connector.h
+ *
+ *  @author Alexander Libman <alibman@ihug.com.au>
+ */
+//=============================================================================
+
+#ifndef ACE_ASYNCH_CONNECTOR_H
+#define ACE_ASYNCH_CONNECTOR_H
+#include /**/ "ace/pre.h"
+
+#include /**/ "ace/config-all.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#if (defined (ACE_WIN32) || defined (ACE_HAS_AIO_CALLS)) && !defined(ACE_HAS_WINCE)
+// This only works on platforms that support async i/o.
+
+#include "ace/Asynch_IO.h"
+#include "ace/INET_Addr.h"
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+// Forward declarations
+class ACE_Message_Block;
+
+/**
+ * @class ACE_Asynch_Connector
+ *
+ * @brief This class is an example of the Connector pattern.  This class
+ * will establish new connections and create new HANDLER objects to handle
+ * the new connections.
+ *
+ * Unlike the ACE_Connector, however, this class is designed to
+ * be used asynchronously with the ACE Proactor framework.
+ */
+
+template <class HANDLER>
+class ACE_Asynch_Connector : public ACE_Handler
+{
+public:
+  /// A do nothing constructor.
+  ACE_Asynch_Connector (void);
+
+  /// Virtual destruction
+  virtual ~ACE_Asynch_Connector (void);
+
+  /**
+   * This opens asynch connector
+   */
+  virtual int open (bool pass_addresses = false,
+                    ACE_Proactor *proactor = 0,
+                    bool validate_new_connection = true);
+
+  /// This initiates a new asynchronous connect
+  virtual int connect (const ACE_INET_Addr &remote_sap,
+                       const ACE_INET_Addr &local_sap =
+                         (const ACE_INET_Addr &)ACE_Addr::sap_any,
+                       int reuse_addr = 1,
+                       const void *act = 0);
+
+  /**
+   * This cancels all pending accepts operations that were issued by
+   * the calling thread.
+   *
+   * @note On Windows, this method does not cancel connect operations
+   *       issued by other threads.
+   *
+   * @note On POSIX, delegates cancelation to ACE_POSIX_Asynch_Connect.
+   */
+  virtual int cancel (void);
+
+
+  /**
+   * Template method to validate peer before service is opened.
+   * This method is called when the connection attempt completes,
+   * whether it succeeded or failed, if the @a validate_connection
+   * argument to @c open() was non-zero or the @c validate_new_connection()
+   * method is called to turn this feature on.  The default implementation
+   * returns 0.  Users can (and probably should) reimplement this method
+   * to learn about the success or failure of the connection attempt.
+   * If the connection completed successfully, this method can be used to
+   * perform validation of the peer using it's address, running an
+   * authentication procedure (such as SSL) or anything else necessary or
+   * desireable. The return value from this method determines whether or
+   * not ACE will continue opening the service or abort the connection.
+   *
+   * @param result  Result of the connection acceptance. Use
+   *                result.success() to determine success or failure of
+   *                the connection attempt.
+   * @param remote  Peer's address. If the connection failed, this object
+   *                is undefined.
+   * @param local   Local address connection was completed from. If the
+   *                connection failed, this object is undefined.
+   *
+   * @retval  -1  ACE_Asynch_Connector will close the connection, and
+   *              the service will not be opened.
+   * @retval  0   Service opening will proceeed.
+   * @return  Return value is ignored if the connection attempt failed.
+   */
+  virtual int validate_connection (const ACE_Asynch_Connect::Result& result,
+                                   const ACE_INET_Addr &remote,
+                                   const ACE_INET_Addr& local);
+
+  //
+  // These are low level tweaking methods
+  //
+
+  /// Set and get flag that indicates if parsing and passing of
+  /// addresses to the service_handler is necessary.
+  virtual bool pass_addresses (void) const;
+  virtual void pass_addresses (bool new_value);
+
+  /// Set and get flag that indicates if address validation is
+  /// required.
+  virtual bool validate_new_connection (void) const;
+  virtual void validate_new_connection (bool new_value);
+
+protected:
+
+  /// This is called when an outstanding accept completes.
+  virtual void handle_connect (const ACE_Asynch_Connect::Result &result);
+
+
+  /// This parses the address from read buffer.
+  void parse_address (const ACE_Asynch_Connect::Result &result,
+                      ACE_INET_Addr &remote_address,
+                      ACE_INET_Addr &local_address);
+
+  /// Return the asynch Connect object.
+  ACE_Asynch_Connect & asynch_connect (void);
+
+  /**
+   * This is the template method used to create new handler.
+   * Subclasses must overwrite this method if a new handler creation
+   * strategy is required.
+   */
+  virtual HANDLER *make_handler (void);
+
+private:
+
+  /// Asynch_Connect used to make life easier :-)
+  ACE_Asynch_Connect asynch_connect_;
+
+  /// Flag that indicates if parsing of addresses is necessary.
+  bool pass_addresses_;
+
+  /// Flag that indicates if address validation is required.
+  bool validate_new_connection_;
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
+#include "ace/Asynch_Connector.cpp"
+#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
+
+#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
+#pragma implementation ("Asynch_Connector.cpp")
+#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
+
+#endif /* ACE_WIN32 || ACE_HAS_AIO_CALLS */
+#include /**/ "ace/post.h"
+#endif /* ACE_ASYNCH_CONNECTOR_H */