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diff --git a/backend/net.h b/backend/net.h
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+/* sane - Scanner Access Now Easy.
+   Copyright (C) 1997 David Mosberger-Tang
+   Copyright (C) 2003 Julien BLACHE <jb@jblache.org>
+      AF-independent code + IPv6
+
+   This file is part of the SANE package.
+
+   This program 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.
+
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, 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.  */
+#ifndef net_h
+#define net_h
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include "../include/sane/sanei_wire.h"
+#include "../include/sane/config.h"
+
+typedef struct Net_Device
+  {
+    struct Net_Device *next;
+    const char *name;
+#if defined (HAVE_GETADDRINFO) && defined (HAVE_GETNAMEINFO)
+    struct addrinfo *addr;
+    struct addrinfo *addr_used;
+#else
+    struct sockaddr addr;
+#endif /* HAVE_GETADDRINFO && HAVE_GETNAMEINFO */
+    int ctl;			/* socket descriptor (or -1) */
+    Wire wire;
+    int auth_active;
+  }
+Net_Device;
+
+typedef struct Net_Scanner
+  {
+    /* all the state needed to define a scan request: */
+    struct Net_Scanner *next;
+
+    int options_valid;			/* are the options current? */
+    SANE_Option_Descriptor_Array opt, local_opt;
+
+    SANE_Word handle;		/* remote handle (it's a word, not a ptr!) */
+
+    int data;			/* data socket descriptor */
+    int reclen_buf_offset;
+    u_char reclen_buf[4];
+    size_t bytes_remaining;	/* how many bytes left in this record? */
+
+    /* device (host) info: */
+    Net_Device *hw;
+  }
+Net_Scanner;
+
+#endif /* net_h */