schanneladapter.h

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#ifndef UTILS_BASE_SCHANNELADAPTER_H_
#define UTILS_BASE_SCHANNELADAPTER_H_

#include <string>
#include "ssladapter.h"
#include "messagequeue.h"
struct _SecBufferDesc;

namespace utils_base {

///////////////////////////////////////////////////////////////////////////////

class SChannelAdapter : public SSLAdapter, public MessageHandler {
public:
  SChannelAdapter(AsyncSocket* socket);
  virtual ~SChannelAdapter();

  virtual int StartSSL(const char* hostname, bool restartable);
  virtual int Send(const void* pv, size_t cb);
  virtual int Recv(void* pv, size_t cb);
  virtual int Close();

  // Note that the socket returns ST_CONNECTING while SSL is being negotiated.
  virtual ConnState GetState() const;

protected:
  enum SSLState {
    SSL_NONE, SSL_WAIT, SSL_CONNECTING, SSL_CONNECTED, SSL_ERROR
  };
  struct SSLImpl;

  virtual void OnConnectEvent(AsyncSocket* socket);
  virtual void OnReadEvent(AsyncSocket* socket);
  virtual void OnWriteEvent(AsyncSocket* socket);
  virtual void OnCloseEvent(AsyncSocket* socket, int err);
  virtual void OnMessage(Message* pmsg);

  int BeginSSL();
  int ContinueSSL();
  int ProcessContext(long int status, _SecBufferDesc* sbd_in,
                     _SecBufferDesc* sbd_out);
  int DecryptData();

  int Read();
  int Flush();
  void Error(const char* context, int err, bool signal = true);
  void Cleanup();

  void PostEvent();

private:
  SSLState state_;
  std::string ssl_host_name_;
  // If true, socket will retain SSL configuration after Close.
  bool restartable_; 
  // If true, we are delaying signalling close until all data is read.
  bool signal_close_;
  // If true, we are waiting to be woken up to signal readability or closure.
  bool message_pending_;
  SSLImpl* impl_;
};

/////////////////////////////////////////////////////////////////////////////

} // namespace utils_base

#endif // UTILS_BASE_SCHANNELADAPTER_H_