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diff --git a/backend/pixma_bjnp.h b/backend/pixma_bjnp.h
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+/* SANE - Scanner Access Now Easy.
+
+   Copyright (C) 2008 by Louis Lagendijk
+   based on sane_usb.h:
+   Copyright (C) 2003, 2005 Rene Rebe (sanei_read_int,sanei_set_timeout)
+   Copyright (C) 2001, 2002 Henning Meier-Geinitz
+
+   This file is part of the SANE package.
+
+   SANE is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   SANE is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with sane; see the file COPYING.  If not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+   As a special exception, the authors of SANE give permission for
+   additional uses of the libraries contained in this release of SANE.
+
+   The exception is that, if you link a SANE library with other files
+   to produce an executable, this does not by itself cause the
+   resulting executable to be covered by the GNU General Public
+   License.  Your use of that executable is in no way restricted on
+   account of linking the SANE library code into it.
+
+   This exception does not, however, invalidate any other reasons why
+   the executable file might be covered by the GNU General Public
+   License.
+
+   If you submit changes to SANE to the maintainers to be included in
+   a subsequent release, you agree by submitting the changes that
+   those changes may be distributed with this exception intact.
+
+   If you write modifications of your own for SANE, it is your choice
+   whether to permit this exception to apply to your modifications.
+   If you do not wish that, delete this exception notice.
+*/
+/** @file sanei_bjnp.h
+ * This file provides a generic BJNP interface.  
+ */
+
+#ifndef sanei_bjnp_h
+#define sanei_bjnp_h
+
+#include "../include/sane/config.h"
+#include "../include/sane/sane.h"
+#include "pixma.h"
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>		/* for size_t */
+#endif
+
+/** Initialize sanei_bjnp.
+ *
+ * Call this before any other sanei_bjnp function.
+ */
+extern void sanei_bjnp_init (void);
+
+/** Find scanners responding to a BJNP broadcast.
+ *
+ * The function attach is called for every device which has been found.
+ * Serial is the address of the scanner in human readable form of max
+ * SHORT_HOSTNAME_MAX characters
+ * @param conf_devices list of pre-configures device URI's to attach
+ * @param attach attach function
+ * @param pixma_devices device informatio needed by attach function
+ *
+ * @return SANE_STATUS_GOOD - on success (even if no scanner was found)
+ */
+
+#define SHORT_HOSTNAME_MAX 16
+
+extern SANE_Status
+sanei_bjnp_find_devices (const char **conf_devices,
+                         SANE_Status (*attach_bjnp)
+			 (SANE_String_Const devname,
+			  SANE_String_Const makemodel,
+			  SANE_String_Const serial,
+			  const struct pixma_config_t *
+			  const pixma_devices[]),
+			 const struct pixma_config_t *const pixma_devices[]);
+
+/** Open a BJNP device.
+ *
+ * The device is opened by its name devname and the device number is
+ * returned in dn on success.  
+ *
+ * Device names consist of an URI                                     
+ * Where:
+ * method = bjnp
+ * hostname = resolvable name or IP-address
+ * port = 8612 for a scanner
+ * An example could look like this: bjnp://host.domain:8612
+ *
+ * @param devname name of the device to open
+ * @param dn device number
+ *
+ * @return
+ * - SANE_STATUS_GOOD - on success
+ * - SANE_STATUS_ACCESS_DENIED - if the file couldn't be accessed due to
+ *   permissions
+ * - SANE_STATUS_INVAL - on every other error
+ */
+extern SANE_Status sanei_bjnp_open (SANE_String_Const devname, SANE_Int * dn);
+
+/** Close a BJNP device.
+ * 
+ * @param dn device number
+ */
+
+extern void sanei_bjnp_close (SANE_Int dn);
+
+/** Activate a BJNP device connection
+ *
+ *  @param dn device number
+ */
+
+extern SANE_Status sanei_bjnp_activate (SANE_Int dn);
+
+/** De-activate a BJNP device connection
+ *
+ * @param dn device number
+ */
+
+extern SANE_Status sanei_bjnp_deactivate (SANE_Int dn);
+
+/** Set the libbjnp timeout for bulk and interrupt reads.
+ * 
+ * @param devno device number
+ * @param timeout the new timeout in ms
+ */
+extern void sanei_bjnp_set_timeout (SANE_Int devno, SANE_Int timeout);
+
+/** Check if sanei_bjnp_set_timeout() is available.
+ */
+#define HAVE_SANEI_BJNP_SET_TIMEOUT
+
+/** Initiate a bulk transfer read.
+ *
+ * Read up to size bytes from the device to buffer. After the read, size
+ * contains the number of bytes actually read.
+ *
+ * @param dn device number
+ * @param buffer buffer to store read data in
+ * @param size size of the data
+ *
+ * @return 
+ * - SANE_STATUS_GOOD - on succes
+ * - SANE_STATUS_EOF - if zero bytes have been read
+ * - SANE_STATUS_IO_ERROR - if an error occured during the read
+ * - SANE_STATUS_INVAL - on every other error
+ *
+ */
+extern SANE_Status
+sanei_bjnp_read_bulk (SANE_Int dn, SANE_Byte * buffer, size_t * size);
+
+/** Initiate a bulk transfer write.
+ *
+ * Write up to size bytes from buffer to the device. After the write size
+ * contains the number of bytes actually written.
+ *
+ * @param dn device number
+ * @param buffer buffer to write to device
+ * @param size size of the data
+ *
+ * @return 
+ * - SANE_STATUS_GOOD - on succes
+ * - SANE_STATUS_IO_ERROR - if an error occured during the write
+ * - SANE_STATUS_INVAL - on every other error
+ */
+extern SANE_Status
+sanei_bjnp_write_bulk (SANE_Int dn, const SANE_Byte * buffer, size_t * size);
+
+/** Initiate a interrupt transfer read.
+ *
+ * Read up to size bytes from the interrupt endpoint from the device to
+ * buffer. After the read, size contains the number of bytes actually read.
+ *
+ * @param dn device number
+ * @param buffer buffer to store read data in
+ * @param size size of the data
+ *
+ * @return 
+ * - SANE_STATUS_GOOD - on succes
+ * - SANE_STATUS_EOF - if zero bytes have been read
+ * - SANE_STATUS_IO_ERROR - if an error occured during the read
+ * - SANE_STATUS_INVAL - on every other error
+ *
+ */
+
+extern SANE_Status
+sanei_bjnp_read_int (SANE_Int dn, SANE_Byte * buffer, size_t * size);
+
+/*------------------------------------------------------*/
+#endif /* sanei_bjnp_h */