C++ VSocket::ReadExact方法代码示例

BOOL
vncClientThread::InitVersion()
{
	// Generate the server's protocol version
	rfbProtocolVersionMsg protocolMsg;
	sprintf((char *)protocolMsg,
		rfbProtocolVersionFormat,
		rfbProtocolMajorVersion,
		rfbProtocolMinorVersion);

	// Send the protocol message
	if (!m_socket->SendExact((char *)&protocolMsg, sz_rfbProtocolVersionMsg))
		return FALSE;

	// Now, get the client's protocol version
	rfbProtocolVersionMsg protocol_ver;
	protocol_ver[12] = 0;
	if (!m_socket->ReadExact((char *)&protocol_ver, sz_rfbProtocolVersionMsg))
		return FALSE;

	// Check the protocol version
	int major, minor;
	sscanf((char *)&protocol_ver, rfbProtocolVersionFormat, &major, &minor);
	if (major != rfbProtocolMajorVersion)
		return FALSE;

	return TRUE;
}

qint64 vsocketDispatcher( char * _buf, const qint64 _len,
                                const SocketOpCodes _op_code, void * _user )
{
	VSocket * sock = static_cast<VSocket *>( _user );
	switch( _op_code )
	{
		case SocketRead: return( sock->ReadExact( _buf, _len ) ?
								_len : 0 );
		case SocketWrite: return( sock->SendExact( _buf, _len ) ?
								_len : 0 );
		case SocketGetPeerAddress:
			strncpy( _buf, sock->GetPeerName(), _len );
			return( 0 );
	}
	return( 0 );

}

//.........这里部分代码省略.........
	// Initial negotiation is complete, so set the protocol ready flag
	m_client->EnableProtocol();
	
	// Add a fullscreen update to the client's update list
  { omni_mutex_lock l(m_client->GetUpdateLock());
	  m_client->m_update_tracker.add_changed(m_client->m_fullscreen);
  }

	// Clear the CapsLock and NumLock keys
	if (m_client->m_keyboardenabled)
	{
		ClearKeyState(VK_CAPITAL);
		// *** JNW - removed because people complain it's wrong
		//ClearKeyState(VK_NUMLOCK);
		ClearKeyState(VK_SCROLL);
	}

	// MAIN LOOP

	// Set the input thread to a high priority
	set_priority(omni_thread::PRIORITY_HIGH);

	BOOL connected = TRUE;
	while (connected)
	{
		rfbClientToServerMsg msg;

		// Ensure that we're running in the correct desktop
		if (!vncService::InputDesktopSelected())
			if (!vncService::SelectDesktop(NULL))
				break;

		// Try to read a message ID
		if (!m_socket->ReadExact((char *)&msg.type, sizeof(msg.type)))
		{
			connected = FALSE;
			break;
		}

		// What to do is determined by the message id
		switch(msg.type)
		{

		case rfbSetPixelFormat:
			// Read the rest of the message:
			if (!m_socket->ReadExact(((char *) &msg)+1, sz_rfbSetPixelFormatMsg-1))
			{
				connected = FALSE;
				break;
			}

			// Swap the relevant bits.
			msg.spf.format.redMax = Swap16IfLE(msg.spf.format.redMax);
			msg.spf.format.greenMax = Swap16IfLE(msg.spf.format.greenMax);
			msg.spf.format.blueMax = Swap16IfLE(msg.spf.format.blueMax);

			// Prevent updates while the pixel format is changed
			m_client->DisableProtocol();
				
			// Tell the buffer object of the change			
			if (!m_client->m_encodemgr.SetClientFormat(msg.spf.format))
			{
				vnclog.Print(LL_CONNERR, VNCLOG("remote pixel format invalid\n"));

				connected = FALSE;
			}

//.........这里部分代码省略.........
				if (!m_socket->SendExact((char *)&errlen, sizeof(errlen)))
					return FALSE;
				m_socket->SendExact(errmsg, strlen(errmsg));

				return FALSE;
			}
		}
	}

	// Authenticate the connection, if required
	if (m_auth || (strlen(plain) == 0))
	{
		// Send no-auth-required message
		CARD32 auth_val = Swap32IfLE(rfbNoAuth);
		if (!m_socket->SendExact((char *)&auth_val, sizeof(auth_val)))
			return FALSE;
	}
	else
	{
		// Send auth-required message
		CARD32 auth_val = Swap32IfLE(rfbVncAuth);
		if (!m_socket->SendExact((char *)&auth_val, sizeof(auth_val)))
			return FALSE;

		BOOL auth_ok = TRUE;
		{
			// Now create a 16-byte challenge
			char challenge[16];
			vncRandomBytes((BYTE *)&challenge);

			// Send the challenge to the client
			if (!m_socket->SendExact(challenge, sizeof(challenge)))
				return FALSE;

			// Read the response
			char response[16];
			if (!m_socket->ReadExact(response, sizeof(response)))\
				return FALSE;

			// Encrypt the challenge bytes
			vncEncryptBytes((BYTE *)&challenge, plain);

			// Compare them to the response
			for (int i=0; i<sizeof(challenge); i++)
			{
				if (challenge[i] != response[i])
				{
					auth_ok = FALSE;
					break;
				}
			}
		}

		// Did the authentication work?
		CARD32 authmsg;
		if (!auth_ok)
		{
			vnclog.Print(LL_CONNERR, VNCLOG("authentication failed\n"));

			authmsg = Swap32IfLE(rfbVncAuthFailed);
			m_socket->SendExact((char *)&authmsg, sizeof(authmsg));
			return FALSE;
		}
		else
		{
			// Tell the client we're ok
			authmsg = Swap32IfLE(rfbVncAuthOK);
			if (!m_socket->SendExact((char *)&authmsg, sizeof(authmsg)))
				return FALSE;
		}
	}

	// Read the client's initialisation message
	rfbClientInitMsg client_ini;
	if (!m_socket->ReadExact((char *)&client_ini, sz_rfbClientInitMsg))
		return FALSE;

	// If the client wishes to have exclusive access then remove other clients
	if (!client_ini.shared && !m_shared)
	{
		// Which client takes priority, existing or incoming?
		if (m_server->ConnectPriority() < 1)
		{
			// Incoming
			vnclog.Print(LL_INTINFO, VNCLOG("non-shared connection - disconnecting old clients\n"));
			m_server->KillAuthClients();
		} else if (m_server->ConnectPriority() > 1)
		{
			// Existing
			if (m_server->AuthClientCount() > 0)
			{
				vnclog.Print(LL_CLIENTS, VNCLOG("connections already exist - client rejected\n"));
				return FALSE;
			}
		}
	}

	// Tell the server that this client is ok
	return m_server->Authenticated(m_client->GetClientId());
}