New upstream version 1.0.29upstream/1.0.29

1 files changed, 0 insertions, 2558 deletions

diff --git a/backend/pixma_bjnp.c b/backend/pixma_bjnp.c
deleted file mode 100644
index 5a9932e..0000000
--- a/backend/pixma_bjnp.c
+++ /dev/null
@@ -1,2558 +0,0 @@
-/* SANE - Scanner Access Now Easy.
-
-   Copyright (C) 2008  2012 by Louis Lagendijk
-
-   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.
-*/
-#undef BACKEND_NAME
-#define BACKEND_NAME bjnp
-
-#include  "../include/sane/config.h"
-#include  "../include/sane/sane.h"
-
-/*
- * Standard types etc
- */
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-#include <unistd.h>
-#include <stdio.h>
-#ifdef HAVE_STDINT_H
-#include <stdint.h>
-#endif
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-#ifdef HAVE_LIMITS_H
-#include <limits.h>
-#endif
-
-/*
- * networking stuff
- */
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#include <net/if.h>
-#ifdef HAVE_IFADDRS_H
-#include <ifaddrs.h>
-#endif
-#ifdef HAVE_SYS_SELECT_H
-#include <sys/select.h>
-#endif
-#ifdef HAVE_PWD_H
-#include <pwd.h>
-#endif
-#include <errno.h>
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-
-#include "pixma_bjnp_private.h"
-#include "pixma_bjnp.h"
-/* #include "pixma_rename.h" */
-#include "pixma.h"
-#include "pixma_common.h"
-
-#ifndef SSIZE_MAX
-# define SSIZE_MAX      LONG_MAX
-#endif
-
-/* static data */
-static bjnp_device_t device[BJNP_NO_DEVICES];
-static int bjnp_no_devices = 0;
-
-/*
- * Private functions
- */
-
-static void
-u8tohex (char *string, const uint8_t *value, int len )
-{
-  int i;
-  int x;
-  const char hdigit[16] =
-    { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
-    'e', 'f'
-  };
-  for (i = 0; i < len; i++)
-    {
-      x = value[i];
-      string[ 2 * i ] = hdigit[(x >> 4) & 0xf];
-      string[ 2 * i + 1] = hdigit[x & 0xf];
-    }
-  string[2 * len ] = '\0';
-}
-
-static void
-u32tohex (uint32_t x, char *str)
-{
-  uint8_t uint8[4];
-  uint8[0] = (uint8_t)(x >> 24);
-  uint8[1] = (uint8_t)(x >> 16);
-  uint8[2] = (uint8_t)(x >> 8);
-  uint8[3] = (uint8_t)x ;
-  u8tohex(str, uint8, 4);
-}
-
-static void
-bjnp_hexdump (int level, const void *d_, unsigned len)
-{
-  const uint8_t *d = (const uint8_t *) (d_);
-  unsigned ofs, c, plen;
-  char line[100];               /* actually only 1+8+1+8*3+1+8*3+1 = 61 bytes needed */
-
-  if (level > DBG_LEVEL)
-    return;
-  if (level == DBG_LEVEL)
-    /* if debuglevel == exact match and buffer contains more than 3 lines, print 2 lines + .... */
-    plen = (len > 64) ? 32: len;
-  else
-    plen = len;
-  ofs = 0;
-  while (ofs < plen)
-    {
-      char *p;
-      line[0] = ' ';
-      u32tohex (ofs, line + 1);
-      line[9] = ':';
-      p = line + 10;
-      for (c = 0; c != 16 && (ofs + c) < plen; c++)
-        {
-          u8tohex (p, d + ofs + c, 1);
-          p[2] = ' ';
-          p += 3;
-          if (c == 7)
-            {
-              p[0] = ' ';
-              p++;
-            }
-        }
-      p[0] = '\0';
-      bjnp_dbg (level, "%s\n", line);
-      ofs += c;
-    }
-  if (len > plen)
-    bjnp_dbg(level, "......\n");
-}
-
-static int sa_is_equal( const bjnp_sockaddr_t * sa1, const bjnp_sockaddr_t * sa2)
-{
-  if ((sa1 == NULL) || (sa2 == NULL) )
-    return 0;
-
-  if (sa1->addr.sa_family == sa2-> addr.sa_family)
-    {
-      if( sa1 -> addr.sa_family == AF_INET)
-        {
-          if ( (sa1->ipv4.sin_port == sa2->ipv4.sin_port) &&
-               (sa1->ipv4.sin_addr.s_addr == sa2->ipv4.sin_addr.s_addr))
-            {
-            return 1;
-            }
-        }
-#ifdef ENABLE_IPV6
-      else if (sa1 -> addr.sa_family == AF_INET6 )
-        {
-          if ( (sa1-> ipv6.sin6_port == sa2->ipv6.sin6_port) &&
-              (memcmp(&(sa1->ipv6.sin6_addr), &(sa2->ipv6.sin6_addr), sizeof(struct in6_addr)) == 0))
-            {
-              return 1;
-            }
-        }
-#endif
-    }
-    return 0;
-}
-
-static int
-sa_size( const bjnp_sockaddr_t *sa)
-{
-  switch (sa -> addr.sa_family)
-    {
-      case AF_INET:
-        return (sizeof(struct sockaddr_in) );
-#ifdef ENABLE_IPV6
-      case AF_INET6:
-        return (sizeof(struct sockaddr_in6) );
-#endif
-      default:
-        /* should not occur */
-        return sizeof( bjnp_sockaddr_t );
-    }
-}
-
-static int
-get_protocol_family( const bjnp_sockaddr_t *sa)
-{
-  switch (sa -> addr.sa_family)
-    {
-      case AF_INET:
-        return PF_INET;
-        break;
-#ifdef ENABLE_IPV6
-      case AF_INET6:
-        return PF_INET6;
-        break;
-#endif
-      default:
-        /* should not occur */
-        return -1;
-    }
-}
-
-static void
-get_address_info ( const bjnp_sockaddr_t *addr, char * addr_string, int *port)
-{
-  char tmp_addr[BJNP_HOST_MAX];
-  if ( addr->addr.sa_family == AF_INET)
-    {
-      inet_ntop( AF_INET, &(addr -> ipv4.sin_addr.s_addr), addr_string, BJNP_HOST_MAX);
-      *port = ntohs (addr->ipv4.sin_port);
-    }
-#ifdef ENABLE_IPV6
-  else if (addr->addr.sa_family == AF_INET6)
-    {
-      inet_ntop( AF_INET6, addr -> ipv6.sin6_addr.s6_addr, tmp_addr, sizeof(tmp_addr) );
-
-      if (IN6_IS_ADDR_LINKLOCAL( &(addr -> ipv6.sin6_addr) ) )
-          sprintf(addr_string, "[%s%%%d]", tmp_addr, addr -> ipv6.sin6_scope_id);
-
-      *port = ntohs (addr->ipv6.sin6_port);
-    }
-#endif
-  else
-    {
-      /* unknown address family, should not occur */
-      strcpy(addr_string, "Unknown address family");
-      *port = 0;
-    }
-}
-
-static int
-parse_IEEE1284_to_model (char *scanner_id, char *model)
-{
-/*
- * parses the  IEEE1284  ID of the scanner to retrieve make and model
- * of the scanner
- * Returns: 0 = not found
- *          1 = found, model is set
- */
-
-  char s[BJNP_IEEE1284_MAX];
-  char *tok;
-
-  strncpy (s, scanner_id, BJNP_IEEE1284_MAX);
-  s[BJNP_IEEE1284_MAX - 1] = '\0';
-  model[0] = '\0';
-
-  tok = strtok (s, ";");
-  while (tok != NULL)
-    {
-      /* MDL contains make and model */
-
-      if (strncmp (tok, "MDL:", 4) == 0)
-	{
-	  strncpy (model, tok + 4, BJNP_IEEE1284_MAX);
-	  model[BJNP_IEEE1284_MAX -1] = '\0';
-	  return 1;
-	}
-      tok = strtok (NULL, ";");
-    }
-  return 0;
-}
-
-static int
-charTo2byte (char *d, const char *s, int len)
-{
-  /*
-   * copy ASCII string to UTF-16 unicode string
-   * len is length of destination buffer
-   * Returns: number of characters copied
-   */
-
-  int done = 0;
-  int copied = 0;
-  int i;
-
-  len = len / 2;
-  for (i = 0; i < len; i++)
-    {
-      d[2 * i] = '\0';
-      if (s[i] == '\0')
-	{
-	  done = 1;
-	}
-      if (done == 0)
-	{
-	  d[2 * i + 1] = s[i];
-	  copied++;
-	}
-      else
-	d[2 * i + 1] = '\0';
-    }
-  return copied;
-}
-
-static bjnp_protocol_defs_t *get_protocol_by_method( char *method)
-{
-  int i = 0;
-  while ( bjnp_protocol_defs[i].method_string != NULL)
-    {
-      if (strcmp(method, bjnp_protocol_defs[i].method_string) == 0)
-        {
-          return &bjnp_protocol_defs[i];
-        }
-      i++;
-    }
-  return NULL;
-}
-
-static bjnp_protocol_defs_t *get_protocol_by_proto_string( char *proto_string)
-{
-  int i = 0;
-  while ( bjnp_protocol_defs[i].proto_string != NULL)
-    {
-      if (strncmp(proto_string, bjnp_protocol_defs[i].proto_string, 4) == 0)
-        {
-          return &bjnp_protocol_defs[i];
-        }
-      i++;
-    }
-  return NULL;
-}
-
-static char *
-getusername (void)
-{
-  static char noname[] = "sane_pixma";
-  struct passwd *pwdent;
-
-#ifdef HAVE_PWD_H
-  if (((pwdent = getpwuid (geteuid ())) != NULL) && (pwdent->pw_name != NULL))
-    return pwdent->pw_name;
-#endif
-  return noname;
-}
-
-
-static char *
-determine_scanner_serial (const char *hostname, const char * mac_address, char *serial)
-{
-  char *dot;
-  char copy[BJNP_HOST_MAX];
-
-  /* determine a "serial number" for the scanner */
-  /* if available we use the hostname or ipv4 address of the printer */
-  /* if we only have a literal ipv6 address, we use the mac-address */
-
-  strcpy(copy, hostname);
-  if (strlen (copy) >= SERIAL_MAX)
-    {
-      /* make the string fit into the serial */
-      /* if this is a FQDN, not an ip-address, remove domain part of the name */
-      if ((dot = strchr (copy, '.')) != NULL)
-        {
-          *dot = '\0';
-        }
-    }
-  /* check if name is still to long. If so use the mac-address */
-  if (strlen(copy) >= SERIAL_MAX)
-    {
-      strcpy(copy, mac_address);
-    }
-  strcpy( serial, copy );
-  return serial;
-}
-
-static int
-bjnp_open_tcp (int devno)
-{
-  int sock;
-  int val;
-  bjnp_sockaddr_t *addr = device[devno].addr;
-  char host[BJNP_HOST_MAX];
-  int port;
-
-  get_address_info( addr, host, &port);
-  PDBG (bjnp_dbg (LOG_DEBUG, "bjnp_open_tcp: Setting up a TCP socket, dest: %s  port %d\n",
-		   host, port ) );
-
-  if ((sock = socket (get_protocol_family( addr ) , SOCK_STREAM, 0)) < 0)
-    {
-      PDBG (bjnp_dbg (LOG_CRIT, "bjnp_open_tcp: ERROR - Can not create socket: %s\n",
-		       strerror (errno)));
-      return -1;
-    }
-
-  val = 1;
-  setsockopt (sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof (val));
-
-#if 0
-  val = 1;
-  setsockopt (sock, SOL_SOCKET, SO_REUSEPORT, &val, sizeof (val));
-
-  val = 1;
-#endif
-
-  /*
-   * Using TCP_NODELAY improves responsiveness, especially on systems
-   * with a slow loopback interface...
-   */
-
-  val = 1;
-  setsockopt (sock, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val));
-
-/*
- * Close this socket when starting another process...
- */
-
-  fcntl (sock, F_SETFD, FD_CLOEXEC);
-
-  if (connect
-      (sock, &(addr->addr), sa_size(device[devno].addr) )!= 0)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT, "bjnp_open_tcp: ERROR - Can not connect to scanner: %s\n",
-	     strerror (errno)));
-      return -1;
-    }
-  device[devno].tcp_socket = sock;
-  return 0;
-}
-
-static int
-split_uri (const char *devname, char *method, char *host, char *port,
-	   char *args)
-{
-  char copy[1024];
-  char *start;
-  char next;
-  int i;
-
-  strncpy (copy, devname, 1024);
-  copy[1023] = '\0';
-  start = copy;
-
-/*
- * retrieve method
- */
-  i = 0;
-  while ((start[i] != '\0') && (start[i] != ':'))
-    {
-      i++;
-    }
-
-  if (((strncmp (start + i, "://", 3) != 0)) || (i > BJNP_METHOD_MAX -1 ))
-    {
-      PDBG (bjnp_dbg (LOG_NOTICE, "split_uri: ERROR - Can not find method in %s (offset %d)\n",
-		       devname, i));
-      return -1;
-    }
-
-  start[i] = '\0';
-  strcpy (method, start);
-  start = start + i + 3;
-
-/*
- * retrieve host
- */
-
-  if (start[0] == '[')
-    {
-      /* literal IPv6 address */
-
-      char *end_of_address = strchr(start, ']');
-
-      if ( ( end_of_address == NULL) ||
-           ( (end_of_address[1] != ':') && (end_of_address[1] != '/' ) &&  (end_of_address[1] != '\0' )) ||
-           ( (end_of_address - start) >= BJNP_HOST_MAX ) )
-        {
-          PDBG (bjnp_dbg (LOG_NOTICE, "split_uri: ERROR - Can not find hostname or address in %s\n", devname));
-          return -1;
-        }
-      next = end_of_address[1];
-      *end_of_address = '\0';
-      strcpy(host, start + 1);
-      start = end_of_address + 2;
-    }
-  else
-    {
-      i = 0;
-      while ((start[i] != '\0') && (start[i] != '/') && (start[i] != ':'))
-        {
-          i++;
-        }
-      next = start[i];
-      start[i] = '\0';
-      if ((i == 0) || (i >= BJNP_HOST_MAX ) )
-        {
-          PDBG (bjnp_dbg (LOG_NOTICE, "split_uri: ERROR - Can not find hostname or address in %s\n", devname));
-          return -1;
-        }
-      strcpy (host, start);
-      start = start + i +1;
-    }
-
-
-/*
- * retrieve port number
- */
-
-  if (next != ':')
-    strcpy(port, "");
-  else
-    {
-      char *end_of_port = strchr(start, '/');
-      if (end_of_port == NULL)
-        {
-          next = '\0';
-        }
-      else
-        {
-          next = *end_of_port;
-          *end_of_port = '\0';
-        }
-      if ((strlen(start) == 0) || (strlen(start) >= BJNP_PORT_MAX ) )
-        {
-          PDBG (bjnp_dbg (LOG_NOTICE, "split_uri: ERROR - Can not find port in %s (have \"%s\")\n", devname, start));
-          return -1;
-        }
-      strcpy(port, start);
-      start = end_of_port + 1;
-    }
-
-/*
- * Retrieve arguments
- */
-
-  if (next == '/')
-    {
-    i = strlen(start);
-    if ( i >= BJNP_ARGS_MAX)
-      {
-        PDBG (bjnp_dbg (LOG_NOTICE, "split_uri: ERROR - Argument string too long in %s\n", devname));
-      }
-    strcpy (args, start);
-    }
-  else
-    strcpy (args, "");
-  return 0;
-}
-
-
-
-static void
-set_cmd_from_string (char* protocol_string, struct BJNP_command *cmd, char cmd_code, int payload_len)
-{
-  /*
-   * Set command buffer with command code, session_id and length of payload
-   * Returns: sequence number of command
-   */
-
-  strncpy (cmd->BJNP_id, protocol_string, sizeof (cmd->BJNP_id));
-  cmd->dev_type = BJNP_CMD_SCAN;
-  cmd->cmd_code = cmd_code;
-  cmd->unknown1 = htons (0);
-
-  /* device not yet opened, use 0 for serial and session) */
-  cmd->seq_no = htons (0);
-  cmd->session_id = htons (0);
-  cmd->payload_len = htonl (payload_len);
-}
-
-static void
-set_cmd_for_dev (int devno, struct BJNP_command *cmd, char cmd_code, int payload_len)
-{
-  /*
-   * Set command buffer with command code, session_id and length of payload
-   * Returns: sequence number of command
-   */
-
-  strncpy (cmd->BJNP_id, device[devno].protocol_string, sizeof (cmd->BJNP_id));
-  cmd->dev_type = BJNP_CMD_SCAN;
-  cmd->cmd_code = cmd_code;
-  cmd->unknown1 = htons (0);
-  cmd->seq_no = htons (++(device[devno].serial));
-  cmd->session_id = (cmd_code == CMD_UDP_POLL ) ? 0 : htons (device[devno].session_id);
-  device[devno].last_cmd = cmd_code;
-  cmd->payload_len = htonl (payload_len);
-}
-
-static int
-bjnp_setup_udp_socket ( const int dev_no )
-{
-  /*
-   * Setup a udp socket for the given device
-   * Returns the socket or -1 in case of error
-   */
-
-  int sockfd;
-  char addr_string[256];
-  int port;
-  bjnp_sockaddr_t * addr = device[dev_no].addr;
-
-  get_address_info( addr, addr_string, &port);
-
-  PDBG (bjnp_dbg (LOG_DEBUG, "setup_udp_socket: Setting up a UDP socket, dest: %s  port %d\n",
-		   addr_string, port ) );
-
-  if ((sockfd = socket (get_protocol_family( addr ), SOCK_DGRAM, IPPROTO_UDP)) == -1)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT, "setup_udp_socket: ERROR - can not open socket - %s\n",
-	     strerror (errno)));
-      return -1;
-    }
-
-  if (connect
-      (sockfd, &(device[dev_no].addr->addr), sa_size(device[dev_no].addr) )!= 0)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT, "setup_udp_socket: ERROR - connect failed- %s\n",
-	     strerror (errno)));
-      close(sockfd);
-      return -1;
-    }
-  return sockfd;
-}
-
-static int
-udp_command (const int dev_no, char *command, int cmd_len, char *response,
-	     int resp_len)
-{
-  /*
-   * send udp command to given device and recieve the response`
-   * returns: the legth of the response or -1
-   */
-  int sockfd;
-  struct timeval timeout;
-  int result;
-  int try, attempt;
-  int numbytes;
-  fd_set fdset;
-  struct BJNP_command *resp = (struct BJNP_command *) response;
-  struct BJNP_command *cmd = (struct BJNP_command *) command;
-
-  if ( (sockfd = bjnp_setup_udp_socket(dev_no) ) == -1 )
-    {
-      PDBG (bjnp_dbg( LOG_CRIT, "udp_command: ERROR - Can not setup socket\n") );
-      return -1;
-    }
-
-  for (try = 0; try < BJNP_UDP_RETRY_MAX; try++)
-    {
-      if ((numbytes = send (sockfd, command, cmd_len, 0)) != cmd_len)
-	{
-	  PDBG (bjnp_dbg
-		(LOG_NOTICE, "udp_command: ERROR - Sent %d bytes, expected %d\n",
-		 numbytes, cmd_len));
-	  continue;
-	}
-
-      attempt = 0;
-
-      /* wait for data to be received, ignore signals being received */
-      /* skip late udp responses (they have an incorrect sequence number */
-      do
-	{
-	  FD_ZERO (&fdset);
-	  FD_SET (sockfd, &fdset);
-
-	  timeout.tv_sec = device[dev_no].bjnp_timeout /1000;
-	  timeout.tv_usec = device[dev_no].bjnp_timeout %1000;
-	}
-      while (((result =
-	       select (sockfd + 1, &fdset, NULL, NULL, &timeout)) <= 0)
-	     && (errno == EINTR) && (attempt++ < BJNP_MAX_SELECT_ATTEMPTS)
-             && resp-> seq_no != cmd->seq_no);
-
-      if (result <= 0)
-	{
-	  PDBG (bjnp_dbg
-		(LOG_NOTICE, "udp_command: ERROR - select failed: %s\n",
-		 result == 0 ? "timed out" : strerror (errno)));
-	  continue;
-	}
-
-      if ((numbytes = recv (sockfd, response, resp_len, 0)) == -1)
-	{
-	  PDBG (bjnp_dbg
-		(LOG_NOTICE, "udp_command: ERROR - recv failed: %s",
-		 strerror (errno)));
-	  continue;
-	}
-      close(sockfd);
-      return numbytes;
-    }
-
-  /* no response even after retry */
-
-  close(sockfd);
-  PDBG (bjnp_dbg
-        (LOG_CRIT, "udp_command: ERROR - no data received (timeout = %d)\n", device[dev_no].bjnp_timeout ) );
-  return -1;
-}
-
-static int
-get_scanner_id (const int dev_no, char *model)
-{
-  /*
-   * get scanner identity
-   * Sets model (make and model)
-   * Return 0 on success, -1 in case of errors
-   */
-
-  struct BJNP_command cmd;
-  struct IDENTITY *id;
-  char scanner_id[BJNP_IEEE1284_MAX];
-  int resp_len;
-  char resp_buf[BJNP_RESP_MAX];
-  int id_len;
-
-  /* set defaults */
-
-  strcpy (model, "Unidentified scanner");
-
-  set_cmd_for_dev (dev_no, &cmd, CMD_UDP_GET_ID, 0);
-
-  PDBG (bjnp_dbg (LOG_DEBUG2, "get_scanner_id: Get scanner identity\n"));
-  PDBG (bjnp_hexdump (LOG_DEBUG2, (char *) &cmd,
-		       sizeof (struct BJNP_command)));
-
-  if ( ( resp_len =  udp_command (dev_no, (char *) &cmd, sizeof (struct BJNP_command),
-		 resp_buf, BJNP_RESP_MAX) ) < (int)sizeof(struct BJNP_command) )
-    {
-      PDBG (bjnp_dbg (LOG_DEBUG, "get_scanner_id: ERROR - Failed to retrieve scanner identity:\n"));
-      return -1;
-    }
-  PDBG (bjnp_dbg (LOG_DEBUG2, "get_scanner_id: scanner identity:\n"));
-  PDBG (bjnp_hexdump (LOG_DEBUG2, resp_buf, resp_len));
-
-  id = (struct IDENTITY *) resp_buf;
-
-  if (device[dev_no].protocol == PROTOCOL_BJNP)
-    {
-      id_len = MIN(ntohl( id-> cmd.payload_len ) - sizeof(id-> payload.bjnp.id_len), BJNP_IEEE1284_MAX);
-      strncpy(scanner_id, id->payload.bjnp.id, id_len);
-      scanner_id[id_len] = '\0';
-    }
-  else
-    {
-      id_len = MIN(ntohl( id-> cmd.payload_len ), BJNP_IEEE1284_MAX);
-      strncpy(scanner_id, id->payload.mfnp.id, id_len);
-      scanner_id[id_len] = '\0';
-    }
-  PDBG (bjnp_dbg (LOG_INFO, "get_scanner_id: Scanner identity string = %s - length = %d\n", scanner_id, id_len));
-
-  /* get make&model from IEEE1284 id  */
-
-  if (model != NULL)
-  {
-    parse_IEEE1284_to_model (scanner_id, model);
-    PDBG (bjnp_dbg (LOG_INFO, "get_scanner_id: Scanner model = %s\n", model));
-  }
-  return 0;
-}
-
-static int
-get_scanner_name(const bjnp_sockaddr_t *scanner_sa, char *host)
-{
-  /*
-   * Parse identify command responses to ip-address
-   * and hostname. Return qulity of the address
-   */
-
-  struct addrinfo *results;
-  struct addrinfo *result;
-  char ip_address[BJNP_HOST_MAX];
-  int port;
-  int error;
-  int match = 0;
-  int level;
-  char service[64];
-
-#ifdef ENABLE_IPV6
-  if ( ( scanner_sa -> addr.sa_family == AF_INET6 ) &&
-       ( IN6_IS_ADDR_LINKLOCAL( &(scanner_sa -> ipv6.sin6_addr ) ) ) )
-    level = BJNP_ADDRESS_IS_LINK_LOCAL;
-  else
-#endif
-    level = BJNP_ADDRESS_IS_GLOBAL;
-
-  get_address_info( scanner_sa, ip_address, &port );
-
-  /* do reverse name lookup, if hostname can not be found return ip-address */
-
-  if( (error = getnameinfo( &(scanner_sa -> addr) , sa_size( scanner_sa),
-                  host, BJNP_HOST_MAX , NULL, 0, NI_NAMEREQD) ) != 0 )
-    {
-      PDBG (bjnp_dbg(LOG_INFO, "get_scanner_name: Name for %s not found : %s\n",
-                      ip_address, gai_strerror(error) ) );
-      strcpy(host, ip_address);
-      return level;
-    }
-  else
-    {
-      sprintf(service, "%d", port);
-      /* some buggy routers return rubbish if reverse lookup fails, so
-       * we do a forward lookup on the received name to see if the result matches */
-
-      if (getaddrinfo(host , service, NULL, &results) == 0)
-        {
-          result = results;
-
-          while (result != NULL)
-            {
-               if(sa_is_equal( scanner_sa, (bjnp_sockaddr_t *)result-> ai_addr))
-                 {
-                     /* found match, good */
-                     PDBG (bjnp_dbg (LOG_INFO,
-                              "get_scanner_name: Forward lookup for %s succeeded, using as hostname\n", host));
-                    match = 1;
-                    level = BJNP_ADDRESS_HAS_FQDN;
-                    break;
-                 }
-              result = result-> ai_next;
-            }
-          freeaddrinfo(results);
-
-          if (match != 1)
-            {
-              PDBG (bjnp_dbg (LOG_INFO,
-                 "get_scanner_name: Forward lookup for %s succeeded, IP-address does not match, using IP-address %s instead\n",
-                 host, ip_address));
-              strcpy (host, ip_address);
-            }
-         }
-       else
-         {
-           /* forward lookup failed, use ip-address */
-           PDBG ( bjnp_dbg (LOG_INFO, "get_scanner_name: Forward lookup of %s failed, using IP-address", ip_address));
-           strcpy (host, ip_address);
-         }
-    }
-  return level;
-}
-
-static int
-get_port_from_sa(const bjnp_sockaddr_t scanner_sa)
-{
-#ifdef ENABLE_IPV6
-  if ( scanner_sa.addr.sa_family == AF_INET6 )
-    {
-      return ntohs(scanner_sa.ipv6.sin6_port);
-    }
-  else
-#endif
-  if ( scanner_sa.addr.sa_family == AF_INET )
-    {
-      return ntohs(scanner_sa.ipv4.sin_port);
-    }
-  return -1;
-}
-
-static int create_broadcast_socket( const bjnp_sockaddr_t * local_addr )
-{
-  int sockfd = -1;
-  int broadcast = 1;
-  int ipv6_v6only = 1;
-
-
- if ((sockfd = socket (local_addr-> addr.sa_family, SOCK_DGRAM, 0)) == -1)
-    {
-      PDBG (bjnp_dbg
-            (LOG_CRIT, "create_broadcast_socket: ERROR - can not open socket - %s",
-             strerror (errno)));
-      return -1;
-    }
-
-  /* Set broadcast flag on socket */
-
-  if (setsockopt
-      (sockfd, SOL_SOCKET, SO_BROADCAST, (const char *) &broadcast,
-       sizeof (broadcast)) != 0)
-    {
-      PDBG (bjnp_dbg
-            (LOG_CRIT,
-             "create_broadcast_socket: ERROR - setting socket option SO_BROADCAST failed - %s",
-             strerror (errno)));
-      close (sockfd);
-      return -1;
-    };
-
-  /* For an IPv6 socket, bind to v6 only so a V6 socket can co-exist with a v4 socket */
-  if ( (local_addr -> addr.sa_family == AF_INET6) && ( setsockopt
-      (sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (const char *) &ipv6_v6only,
-       sizeof (ipv6_v6only)) != 0) )
-    {
-      PDBG (bjnp_dbg
-            (LOG_CRIT,
-             "create_broadcast_socket: ERROR - setting socket option IPV6_V6ONLY failed - %s",
-             strerror (errno)));
-      close (sockfd);
-      return -1;
-    };
-
-  if (bind
-      (sockfd, &(local_addr->addr),
-       (socklen_t) sa_size( local_addr)) != 0)
-    {
-      PDBG (bjnp_dbg
-            (LOG_CRIT,
-             "create_broadcast_socket: ERROR - bind socket to local address failed - %s\n",
-             strerror (errno)));
-      close (sockfd);
-      return -1;
-    }
-  return sockfd;
-}
-
-static int
-prepare_socket(const char *if_name, const bjnp_sockaddr_t *local_sa,
-               const bjnp_sockaddr_t *broadcast_sa, bjnp_sockaddr_t * dest_sa)
-{
-  /*
-   * Prepare a socket for broadcast or multicast
-   * Input:
-   * if_name: the name of the interface
-   * local_sa: local address to use
-   * broadcast_sa: broadcast address to use, if NULL we use all hosts
-   * dest_sa: (write) where to return destination address of broadcast
-   * retuns: open socket or -1
-   */
-
-  int socket = -1;
-  bjnp_sockaddr_t local_sa_copy;
-
-  if ( local_sa == NULL )
-    {
-      PDBG (bjnp_dbg (LOG_DEBUG,
-                       "prepare_socket: %s is not a valid IPv4 interface, skipping...\n",
-                       if_name));
-      return -1;
-    }
-
-  memset( &local_sa_copy, 0, sizeof(local_sa_copy) );
-  memcpy( &local_sa_copy, local_sa, sa_size(local_sa) );
-
-  switch( local_sa_copy.addr.sa_family )
-    {
-      case AF_INET:
-        {
-          local_sa_copy.ipv4.sin_port = htons(BJNP_PORT_SCAN);
-
-          if (local_sa_copy.ipv4.sin_addr.s_addr == htonl (INADDR_LOOPBACK) )
-            {
-              /* not a valid interface */
-
-              PDBG (bjnp_dbg (LOG_DEBUG,
-                               "prepare_socket: %s is not a valid IPv4 interface, skipping...\n",
-	                       if_name));
-              return -1;
-            }
-
-
-          /* send broadcasts to the broadcast address of the interface */
-
-          memcpy(dest_sa, broadcast_sa, sa_size(dest_sa) );
-
-	  /* we fill port when we send the broadcast */
-          dest_sa -> ipv4.sin_port = htons(0);
-
-          if ( (socket = create_broadcast_socket( &local_sa_copy) ) != -1)
-            {
-               PDBG (bjnp_dbg (LOG_INFO, "prepare_socket: %s is IPv4 capable, sending broadcast, socket = %d\n",
-                      if_name, socket));
-            }
-          else
-            {
-              PDBG (bjnp_dbg (LOG_INFO, "prepare_socket: ERROR - %s is IPv4 capable, but failed to create a socket.\n",
-                    if_name));
-              return -1;
-            }
-        }
-        break;
-#ifdef ENABLE_IPV6
-      case AF_INET6:
-        {
-          local_sa_copy.ipv6.sin6_port = htons(BJNP_PORT_SCAN);
-
-          if (IN6_IS_ADDR_LOOPBACK( &(local_sa_copy.ipv6.sin6_addr) ) )
-            {
-              /* not a valid interface */
-
-              PDBG (bjnp_dbg (LOG_DEBUG,
-                               "prepare_socket: %s is not a valid IPv6 interface, skipping...\n",
-	                       if_name));
-              return -1;
-            }
-          else
-            {
-              dest_sa -> ipv6.sin6_family = AF_INET6;
-
-              /* We fill port when we send the broadcast */
-              dest_sa -> ipv6.sin6_port = htons(0);
-
-              inet_pton(AF_INET6, "ff02::1", dest_sa -> ipv6.sin6_addr.s6_addr);
-              if ( (socket = create_broadcast_socket( &local_sa_copy ) ) != -1)
-                {
-                   PDBG (bjnp_dbg (LOG_INFO, "prepare_socket: %s is IPv6 capable, sending broadcast, socket = %d\n",
-                          if_name, socket));
-                }
-              else
-                {
-                  PDBG (bjnp_dbg (LOG_INFO, "prepare_socket: ERROR - %s is IPv6 capable, but failed to create a socket.\n",
-                        if_name));
-                  return -1;
-                }
-            }
-          }
-          break;
-#endif
-
-      default:
-        socket = -1;
-    }
-  return socket;
-}
-
-static int
-bjnp_send_broadcast (int sockfd, const bjnp_sockaddr_t * broadcast_addr, int port,
-                     struct BJNP_command cmd, int size)
-{
-  int num_bytes;
-  bjnp_sockaddr_t dest_addr;
-
-  /* set address to send packet to broadcast address of interface, */
-  /* with port set to the destination port */
-
-  memcpy(&dest_addr,  broadcast_addr, sizeof(dest_addr));
-  if( dest_addr.addr.sa_family == AF_INET)
-    {
-      dest_addr.ipv4.sin_port = htons(port);
-    }
-#ifdef ENABLE_IPV6
-  if( dest_addr.addr.sa_family == AF_INET6)
-    {
-      dest_addr.ipv6.sin6_port = htons(port);
-    }
-#endif
-
-  if ((num_bytes = sendto (sockfd, &cmd, size, 0,
-			  &(dest_addr.addr),
-			  sa_size( broadcast_addr)) ) != size)
-    {
-      PDBG (bjnp_dbg (LOG_INFO,
-		       "bjnp_send_broadcast: Socket: %d: ERROR - sent only %x = %d bytes of packet, error = %s\n",
-		       sockfd, num_bytes, num_bytes, strerror (errno)));
-      /* not allowed, skip this interface */
-
-      return -1;
-    }
-  return sockfd;
-}
-
-static void
-bjnp_finish_job (int devno)
-{
-/*
- * Signal end of scanjob to scanner
- */
-
-  char resp_buf[BJNP_RESP_MAX];
-  int resp_len;
-  struct BJNP_command cmd;
-
-  set_cmd_for_dev (devno, &cmd, CMD_UDP_CLOSE, 0);
-
-  PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_finish_job: Finish scanjob\n"));
-  PDBG (bjnp_hexdump
-	(LOG_DEBUG2, (char *) &cmd, sizeof (struct BJNP_command)));
-  resp_len =
-    udp_command (devno, (char *) &cmd, sizeof (struct BJNP_command), resp_buf,
-		 BJNP_RESP_MAX);
-
-  if (resp_len != sizeof (struct BJNP_command))
-    {
-      PDBG (bjnp_dbg
-	    (LOG_INFO,
-	     "bjnp_finish_job: ERROR - Received %d characters on close scanjob command, expected %d\n",
-	     resp_len, (int) sizeof (struct BJNP_command)));
-      return;
-    }
-  PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_finish_job: Finish scanjob response\n"));
-  PDBG (bjnp_hexdump (LOG_DEBUG2, resp_buf, resp_len));
-
-}
-
-#ifdef PIXMA_BJNP_USE_STATUS
-static int
-bjnp_poll_scanner (int devno, char type,char *hostname, char *user, SANE_Byte *status, int size)
-{
-/*
- * send details of user to the scanner
- */
-
-  char cmd_buf[BJNP_CMD_MAX];
-  char resp_buf[BJNP_RESP_MAX];
-  int resp_len;
-  int len = 0;			/* payload length */
-  int buf_len;			/* length of the whole command  buffer */
-  struct POLL_DETAILS *poll;
-  struct POLL_RESPONSE *response;
-  char user_host[256];
-  time_t t;
-  int user_host_len;
-
-  poll = (struct POLL_DETAILS *) cmd_buf;
-  memset( poll, 0, sizeof( struct POLL_DETAILS));
-  memset( &resp_buf, 0, sizeof( resp_buf) );
-
-
-  /* create payload */
-  poll->type = htons(type);
-
-  user_host_len =  sizeof( poll -> extensions.type2.user_host);
-  snprintf(user_host, (user_host_len /2) ,"%s  %s", user, hostname);
-  user_host[ user_host_len /2 + 1] = '\0';
-
-  switch( type) {
-    case 0:
-      len = 80;
-      break;
-    case 1:
-      charTo2byte(poll->extensions.type1.user_host, user_host, user_host_len);
-      len = 80;
-      break;
-    case 2:
-      poll->extensions.type2.dialog = htonl(device[devno].dialog);
-      charTo2byte(poll->extensions.type2.user_host, user_host, user_host_len);
-      poll->extensions.type2.unknown_1 = htonl(0x14);
-      poll->extensions.type2.unknown_2 = htonl(0x10);
-      t = time (NULL);
-      strftime (poll->extensions.type2.ascii_date,
-                sizeof (poll->extensions.type2.ascii_date),
-               "%Y%m%d%H%M%S", localtime (&t));
-      len = 116;
-      break;
-    case 5:
-      poll->extensions.type5.dialog = htonl(device[devno].dialog);
-      charTo2byte(poll->extensions.type5.user_host, user_host, user_host_len);
-      poll->extensions.type5.unknown_1 = htonl(0x14);
-      poll->extensions.type5.key = htonl(device[devno].status_key);
-      len = 100;
-      break;
-    default:
-      PDBG (bjnp_dbg (LOG_INFO, "bjnp_poll_scanner: unknown packet type: %d\n", type));
-      return -1;
-  };
-  /* we can only now set the header as we now know the length of the payload */
-  set_cmd_for_dev (devno, (struct BJNP_command *) cmd_buf, CMD_UDP_POLL,
-	   len);
-
-  buf_len = len + sizeof(struct BJNP_command);
-  PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_poll_scanner: Poll details (type %d)\n", type));
-  PDBG (bjnp_hexdump (LOG_DEBUG2, cmd_buf,
-		       buf_len));
-
-  resp_len = udp_command (devno, cmd_buf, buf_len,  resp_buf, BJNP_RESP_MAX);
-
-  if (resp_len > 0)
-    {
-      PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_poll_scanner: Poll details response:\n"));
-      PDBG (bjnp_hexdump (LOG_DEBUG2, resp_buf, resp_len));
-      response = (struct POLL_RESPONSE *) resp_buf;
-
-      device[devno].dialog = ntohl( response -> dialog );
-
-      if ( response -> result[3] == 1 )
-        {
-          return BJNP_RESTART_POLL;
-        }
-      if ( (response -> result[2] & 0x80) != 0)
-        {
-          memcpy( status, response->status, size);
-          PDBG( bjnp_dbg(LOG_INFO, "bjnp_poll_scanner: received button status!\n"));
-	  PDBG (bjnp_hexdump( LOG_DEBUG2, status, size ));
-	  device[devno].status_key = ntohl( response -> key );
-          return  size;
-        }
-    }
-  return 0;
-}
-#endif
-
-static void
-bjnp_send_job_details (int devno, char *hostname, char *user, char *title)
-{
-/*
- * send details of scanjob to scanner
- */
-
-  char cmd_buf[BJNP_CMD_MAX];
-  char resp_buf[BJNP_RESP_MAX];
-  int resp_len;
-  struct JOB_DETAILS *job;
-  struct BJNP_command *resp;
-
-  /* send job details command */
-
-  set_cmd_for_dev (devno, (struct BJNP_command *) cmd_buf, CMD_UDP_JOB_DETAILS,
-	   sizeof (*job) - sizeof (struct BJNP_command));
-
-  /* create payload */
-
-  job = (struct JOB_DETAILS *) (cmd_buf);
-  charTo2byte (job->unknown, "", sizeof (job->unknown));
-  charTo2byte (job->hostname, hostname, sizeof (job->hostname));
-  charTo2byte (job->username, user, sizeof (job->username));
-  charTo2byte (job->jobtitle, title, sizeof (job->jobtitle));
-
-  PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_send_job_details: Job details\n"));
-  PDBG (bjnp_hexdump (LOG_DEBUG2, cmd_buf,
-		       (sizeof (struct BJNP_command) + sizeof (*job))));
-
-  resp_len = udp_command (devno, cmd_buf,
-			  sizeof (struct JOB_DETAILS), resp_buf,
-			  BJNP_RESP_MAX);
-
-  if (resp_len > 0)
-    {
-      PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_send_job_details: Job details response:\n"));
-      PDBG (bjnp_hexdump (LOG_DEBUG2, resp_buf, resp_len));
-      resp = (struct BJNP_command *) resp_buf;
-      device[devno].session_id = ntohs (resp->session_id);
-    }
-}
-
-static int
-bjnp_get_scanner_mac_address ( int devno, char *mac_address )
-{
-/*
- * send discover to scanner
- */
-
-  char cmd_buf[BJNP_CMD_MAX];
-  char resp_buf[BJNP_RESP_MAX];
-  int resp_len;
-  struct DISCOVER_RESPONSE *resp = (struct DISCOVER_RESPONSE * )&resp_buf;;
-
-  /* send job details command */
-
-  set_cmd_for_dev (devno, (struct BJNP_command *) cmd_buf, CMD_UDP_DISCOVER, 0);
-  resp_len = udp_command (devno, cmd_buf,
-			  sizeof (struct BJNP_command), resp_buf,
-			  BJNP_RESP_MAX);
-
-  if (resp_len > 0)
-    {
-      PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_get_scanner_mac_address: Discover response:\n"));
-      PDBG (bjnp_hexdump (LOG_DEBUG2, resp_buf, resp_len));
-      u8tohex( mac_address, resp -> mac_addr, sizeof( resp -> mac_addr ) );
-      return 0;
-    }
-  return -1;
-}
-
-static int
-bjnp_write (int devno, const SANE_Byte * buf, size_t count)
-{
-/*
- * This function writes TCP data to the scanner.
- * Returns: number of bytes written to the scanner
- */
-  int sent_bytes;
-  int terrno;
-  struct SCAN_BUF bjnp_buf;
-
-  if (device[devno].scanner_data_left)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT, "bjnp_write: ERROR - scanner data left = 0x%lx = %ld\n",
-	     (unsigned long) device[devno].scanner_data_left,
-	     (unsigned long) device[devno].scanner_data_left));
-    }
-  /* set BJNP command header */
-
-  set_cmd_for_dev (devno, (struct BJNP_command *) &bjnp_buf, CMD_TCP_SEND, count);
-  memcpy (bjnp_buf.scan_data, buf, count);
-  PDBG (bjnp_dbg (LOG_DEBUG, "bjnp_write: sending 0x%lx = %ld bytes\n",
-		   (unsigned long) count, (unsigned long) count);
-	PDBG (bjnp_hexdump (LOG_DEBUG2, (char *) &bjnp_buf,
-			     sizeof (struct BJNP_command) + count)));
-
-  if ((sent_bytes =
-       send (device[devno].tcp_socket, &bjnp_buf,
-	     sizeof (struct BJNP_command) + count, 0)) <
-      (ssize_t) (sizeof (struct BJNP_command) + count))
-    {
-      /* return result from write */
-      terrno = errno;
-      PDBG (bjnp_dbg (LOG_CRIT, "bjnp_write: ERROR - Could not send data!\n"));
-      errno = terrno;
-      return sent_bytes;
-    }
-  /* correct nr of bytes sent for length of command */
-
-  else if (sent_bytes != (int) (sizeof (struct BJNP_command) + count))
-    {
-      errno = EIO;
-      return -1;
-    }
-  return count;
-}
-
-static int
-bjnp_send_read_request (int devno)
-{
-/*
- * This function reads responses from the scanner.
- * Returns: 0 on success, else -1
- *
- */
-  int sent_bytes;
-  int terrno;
-  struct BJNP_command bjnp_buf;
-
-  if (device[devno].scanner_data_left)
-    PDBG (bjnp_dbg
-	  (LOG_CRIT,
-	   "bjnp_send_read_request: ERROR - scanner data left = 0x%lx = %ld\n",
-	   (unsigned long) device[devno].scanner_data_left,
-	   (unsigned long) device[devno].scanner_data_left));
-
-  /* set BJNP command header */
-
-  set_cmd_for_dev (devno, (struct BJNP_command *) &bjnp_buf, CMD_TCP_REQ, 0);
-
-  PDBG (bjnp_dbg (LOG_DEBUG, "bjnp_send_read_req sending command\n"));
-  PDBG (bjnp_hexdump (LOG_DEBUG2, (char *) &bjnp_buf,
-		       sizeof (struct BJNP_command)));
-
-  if ((sent_bytes =
-       send (device[devno].tcp_socket, &bjnp_buf, sizeof (struct BJNP_command),
-	     0)) < 0)
-    {
-      /* return result from write */
-      terrno = errno;
-      PDBG (bjnp_dbg
-	    (LOG_CRIT, "bjnp_send_read_request: ERROR - Could not send data!\n"));
-      errno = terrno;
-      return -1;
-    }
-  return 0;
-}
-
-static SANE_Status
-bjnp_recv_header (int devno, size_t *payload_size )
-{
-/*
- * This function receives the response header to bjnp commands.
- * devno device number
- * size: return value for data size returned by scanner
- * Returns:
- * SANE_STATUS_IO_ERROR when any IO error occurs
- * SANE_STATUS_GOOD in case no errors were encountered
- */
-  struct BJNP_command resp_buf;
-  fd_set input;
-  struct timeval timeout;
-  int recv_bytes;
-  int terrno;
-  int result;
-  int fd;
-  int attempt;
-
-  PDBG (bjnp_dbg
-	(LOG_DEBUG, "bjnp_recv_header: receiving response header\n") );
-  fd = device[devno].tcp_socket;
-
-  *payload_size = 0;
-  attempt = 0;
-  do
-    {
-      /* wait for data to be received, ignore signals being received */
-      FD_ZERO (&input);
-      FD_SET (fd, &input);
-
-      timeout.tv_sec = device[devno].bjnp_timeout /1000;
-      timeout.tv_usec = device[devno].bjnp_timeout %1000;
-    }
-  while ( ( (result = select (fd + 1, &input, NULL, NULL, &timeout)) <= 0) &&
-	 (errno == EINTR) && (attempt++ < BJNP_MAX_SELECT_ATTEMPTS));
-
-  if (result < 0)
-    {
-      terrno = errno;
-      PDBG (bjnp_dbg (LOG_CRIT,
-		       "bjnp_recv_header: ERROR - could not read response header (select): %s!\n",
-		       strerror (terrno)));
-      errno = terrno;
-      return SANE_STATUS_IO_ERROR;
-    }
-  else if (result == 0)
-    {
-      terrno = errno;
-      PDBG (bjnp_dbg (LOG_CRIT,
-		"bjnp_recv_header: ERROR - could not read response header (select timed out after %d ms)!\n",
-		device[devno].bjnp_timeout ) );
-      errno = terrno;
-      return SANE_STATUS_IO_ERROR;
-    }
-
-  /* get response header */
-
-  if ((recv_bytes =
-       recv (fd, (char *) &resp_buf,
-	     sizeof (struct BJNP_command),
-	     0)) != sizeof (struct BJNP_command))
-    {
-      terrno = errno;
-      if (recv_bytes == 0)
-        {
-          PDBG (bjnp_dbg (LOG_CRIT,
-          		"bjnp_recv_header: ERROR - (recv) Scanner closed the TCP-connection!\n"));
-        } else {
-          PDBG (bjnp_dbg (LOG_CRIT,
-	      	       "bjnp_recv_header: ERROR - (recv) could not read response header, received %d bytes!\n",
-		       recv_bytes));
-          PDBG (bjnp_dbg
-	  		(LOG_CRIT, "bjnp_recv_header: ERROR - (recv) error: %s!\n",
-	     		strerror (terrno)));
-        }
-      errno = terrno;
-      return SANE_STATUS_IO_ERROR;
-    }
-
-  if (resp_buf.cmd_code != device[devno].last_cmd)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT,
-	     "bjnp_recv_header: ERROR - Received response has cmd code %d, expected %d\n",
-	     resp_buf.cmd_code, device[devno].last_cmd));
-      return SANE_STATUS_IO_ERROR;
-    }
-
-  if (ntohs (resp_buf.seq_no) != (uint16_t) device[devno].serial)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT,
-	     "bjnp_recv_header: ERROR - Received response has serial %d, expected %d\n",
-	     (int) ntohs (resp_buf.seq_no), (int) device[devno].serial));
-      return SANE_STATUS_IO_ERROR;
-    }
-
-  /* got response header back, retrieve length of payload */
-
-
-  *payload_size = ntohl (resp_buf.payload_len);
-  PDBG (bjnp_dbg
-	(LOG_DEBUG, "bjnp_recv_header: TCP response header(payload data = %ld bytes):\n",
-	 *payload_size) );
-  PDBG (bjnp_hexdump
-	(LOG_DEBUG2, (char *) &resp_buf, sizeof (struct BJNP_command)));
-  return SANE_STATUS_GOOD;
-}
-
-static int
-bjnp_init_device_structure(int dn, bjnp_sockaddr_t *sa, bjnp_protocol_defs_t *protocol_defs, int min_timeout)
-{
-  /* initialize device structure */
-
-  char name[BJNP_HOST_MAX];
-
-  device[dn].open = 0;
-#ifdef PIXMA_BJNP_USE_STATUS
-  device[dn].polling_status = BJNP_POLL_STOPPED;
-  device[dn].dialog = 0;
-  device[dn].status_key = 0;
-#endif
-  device[dn].protocol = protocol_defs->protocol_version;
-  device[dn].protocol_string = protocol_defs->proto_string;
-  device[dn].tcp_socket = -1;
-
-  device[dn].addr = (bjnp_sockaddr_t *) malloc(sizeof ( bjnp_sockaddr_t) );
-  memset( device[dn].addr, 0, sizeof( bjnp_sockaddr_t ) );
-  memcpy(device[dn].addr, sa, sa_size((bjnp_sockaddr_t *)sa) );
-  device[dn].address_level = get_scanner_name(sa, name);
-  device[dn].session_id = 0;
-  device[dn].serial = -1;
-  device[dn].bjnp_timeout = min_timeout;
-  device[dn].bjnp_min_timeout = min_timeout;
-  device[dn].scanner_data_left = 0;
-  device[dn].last_cmd = 0;
-  device[dn].blocksize = BJNP_BLOCKSIZE_START;
-  device[dn].last_block = 0;
-  /* fill mac_address */
-
-  if (bjnp_get_scanner_mac_address(dn, device[dn].mac_address) != 0 )
-    {
-      PDBG (bjnp_dbg
-            (LOG_CRIT, "bjnp_init_device_structure: Cannot read mac address, skipping this scanner\n"  ) );
-      return -1;
-    }
-  return 0;
-}
-
-static void
-bjnp_free_device_structure( int dn)
-{
-  if (device[dn].addr != NULL)
-    {
-    free (device[dn].addr );
-    device[dn].addr = NULL;
-    }
-  device[dn].open = 0;
-}
-
-static SANE_Status
-bjnp_recv_data (int devno, SANE_Byte * buffer, size_t start_pos, size_t * len)
-{
-/*
- * This function receives the payload data.
- * NOTE: len may not exceed SSIZE_MAX (as that is max for recv)
- *       len will be restricted to SSIZE_MAX to be sure
- * Returns: number of bytes of payload received from device
- */
-
-  fd_set input;
-  struct timeval timeout;
-  ssize_t recv_bytes;
-  int terrno;
-  int result;
-  int fd;
-  int attempt;
-
-  PDBG (bjnp_dbg
-	(LOG_DEBUG, "bjnp_recv_data: read response payload (0x%lx bytes max), buffer: 0x%lx, start_pos: 0x%lx\n",
-	 (long) *len, (long) buffer, (long) start_pos));
-
-
-  if (*len == 0)
-    {
-      /* nothing to do */
-      PDBG (bjnp_dbg
-  	    (LOG_DEBUG, "bjnp_recv_data: Nothing to do (%ld bytes requested)\n",
-	     (long) *len));
-      return SANE_STATUS_GOOD;
-    }
-  else if ( *len > SSIZE_MAX )
-    {
-      PDBG (bjnp_dbg
-    	    (LOG_DEBUG, "bjnp_recv_data: WARNING - requested block size (%ld) exceeds maximum, setting to maximum %ld\n",
-	     (long)*len, SSIZE_MAX));
-      *len = SSIZE_MAX;
-    }
-
-  fd = device[devno].tcp_socket;
-  attempt = 0;
-  do
-    {
-      /* wait for data to be received, retry on a signal being received */
-      FD_ZERO (&input);
-      FD_SET (fd, &input);
-      timeout.tv_sec = device[devno].bjnp_timeout /1000;
-      timeout.tv_usec = device[devno].bjnp_timeout %1000;
-    }
-  while (((result = select (fd + 1, &input, NULL, NULL, &timeout)) <= 0) &&
-	 (errno == EINTR) && (attempt++ < BJNP_MAX_SELECT_ATTEMPTS));
-
-  if (result < 0)
-    {
-      terrno = errno;
-      PDBG (bjnp_dbg (LOG_CRIT,
-		       "bjnp_recv_data: ERROR - could not read response payload (select failed): %s!\n",
-		       strerror (errno)));
-      errno = terrno;
-      *len = 0;
-      return SANE_STATUS_IO_ERROR;
-    }
-  else if (result == 0)
-    {
-      terrno = errno;
-      PDBG (bjnp_dbg (LOG_CRIT,
-		"bjnp_recv_data: ERROR - could not read response payload (select timed out after %d ms)!\n",
-		device[devno].bjnp_timeout) );
-      errno = terrno;
-      *len = 0;
-      return SANE_STATUS_IO_ERROR;
-    }
-
-  if ((recv_bytes = recv (fd, buffer + start_pos, *len, 0)) < 0)
-    {
-      terrno = errno;
-      PDBG (bjnp_dbg (LOG_CRIT,
-		       "bjnp_recv_data: ERROR - could not read response payload (%ld + %ld = %ld) (recv): %s!\n",
-		       (long) buffer, (long) start_pos, (long) buffer + start_pos, strerror (errno)));
-      errno = terrno;
-      *len = 0;
-      return SANE_STATUS_IO_ERROR;
-    }
-  PDBG (bjnp_dbg (LOG_DEBUG2, "bjnp_recv_data: Received TCP response payload (%ld bytes):\n",
-		   (unsigned long) recv_bytes));
-  PDBG (bjnp_hexdump (LOG_DEBUG2, buffer, recv_bytes));
-
-  *len = recv_bytes;
-  return SANE_STATUS_GOOD;
-}
-
-static BJNP_Status
-bjnp_allocate_device (SANE_String_Const devname,
-                      SANE_Int * dn, char *resulting_host)
-{
-  char method[BJNP_METHOD_MAX];
-  char host[BJNP_HOST_MAX];
-  char port[BJNP_PORT_MAX] = "";
-  char args[BJNP_ARGS_MAX];
-  bjnp_protocol_defs_t *protocol_defs;
-  struct addrinfo *res, *cur;
-  struct addrinfo hints;
-  int result;
-  int i;
-  int min_timeout = BJNP_TIMEOUT_DEFAULT;
-
-  PDBG (bjnp_dbg (LOG_DEBUG, "bjnp_allocate_device(%s) %d\n", devname, bjnp_no_devices));
-
-  if (split_uri (devname, method, host, port, args) != 0)
-    {
-      return BJNP_STATUS_INVAL;
-    }
-
-  if (strlen (args) > 0)
-    {
-      /* get device specific timeout if any */
-
-      if (strncmp(args, "timeout=", strlen("timeout=")) == 0)
-        {
-          min_timeout = atoi(args + strlen("timeout="));
-          if (min_timeout < BJNP_TIMEOUT_DEFAULT)
-            min_timeout = BJNP_TIMEOUT_DEFAULT;
-        } else {
-		PDBG (bjnp_dbg
-	    		(LOG_CRIT,
-				"bjnp_allocate_device: ERROR - Unrecognized argument: %s\n",
-	     			devname));
-
-      return BJNP_STATUS_INVAL;
-        }
-    }
-  if ( (protocol_defs = get_protocol_by_method(method)) == NULL)
-    {
-      PDBG (bjnp_dbg
-		(LOG_CRIT, "bjnp_allocate_device: ERROR - URI %s contains invalid method: %s\n",
-		 devname, method));
-      return BJNP_STATUS_INVAL;
-    }
-
-  if (strlen(port) == 0)
-    {
-      sprintf( port, "%d", protocol_defs->default_port );
-    }
-
-  hints.ai_flags = 0;
-#ifdef ENABLE_IPV6
-  hints.ai_family = AF_UNSPEC;
-#else
-  hints.ai_family = AF_INET;
-#endif
-  hints.ai_socktype = SOCK_DGRAM;
-  hints.ai_protocol = 0;
-  hints.ai_addrlen = 0;
-  hints.ai_addr = NULL;
-  hints.ai_canonname = NULL;
-  hints.ai_next = NULL;
-
-  result = getaddrinfo (host, port, &hints, &res );
-  if (result != 0 )
-    {
-      PDBG (bjnp_dbg (LOG_CRIT, "bjnp_allocate_device: ERROR - Cannot resolve host: %s port %s\n", host, port));
-      return SANE_STATUS_INVAL;
-    }
-
-  /* Check if a device number is already allocated to any of the scanner's addresses */
-
-  cur = res;
-  while( cur != NULL)
-    {
-      /* create a new device structure for this address */
-
-      if (bjnp_no_devices == BJNP_NO_DEVICES)
-        {
-          PDBG (bjnp_dbg
-    	    (LOG_CRIT,
-    	     "bjnp_allocate_device: WARNING - Too many devices, ran out of device structures, cannot add %s\n",
-    	     devname));
-          freeaddrinfo(res);
-          return BJNP_STATUS_INVAL;
-        }
-      if (bjnp_init_device_structure( bjnp_no_devices, (bjnp_sockaddr_t *)cur -> ai_addr,
-                                      protocol_defs, min_timeout) != 0)
-        {
-          /* giving up on this address, try next one if any */
-          break;
-        }
-      for (i = 0; i < bjnp_no_devices; i++)
-        {
-
-          /* Check if found the scanner before, if so we use the best address
-	   * but still make sure the scanner is listed only once.
-	   * We check for matching addresses as wel as matching mac_addresses as
-           * an IPv6 host can have multiple adresses */
-
-          if ( strcmp( device[i].mac_address, device[bjnp_no_devices].mac_address ) == 0 )
-            {
-              if ( device[i].address_level < device[bjnp_no_devices].address_level )
-                {
-                  /* use the new address instead as it is better */
-                  free (device[i].addr);
-                  device[i].addr = device[bjnp_no_devices].addr;
-                  device[bjnp_no_devices].addr = NULL;
-                  device[i].address_level = device[bjnp_no_devices].address_level;
-                }
-
-	      /* check if new timeout value was defined (e.g. from sanei_bjnp_device_open)
-	       * if so, use new timout value */
-
-              if (device[i].bjnp_min_timeout < device[bjnp_no_devices].bjnp_min_timeout)
-                {
-                  /* use the longer timeout as requested */
-                  device[i].bjnp_timeout = device[bjnp_no_devices].bjnp_min_timeout;
-                  device[i].bjnp_min_timeout = device[bjnp_no_devices].bjnp_min_timeout;
-                }
-              freeaddrinfo(res);
-              *dn = i;
-              bjnp_free_device_structure( bjnp_no_devices);
-              return BJNP_STATUS_ALREADY_ALLOCATED;
-            }
-        }
-      cur = cur->ai_next;
-    }
-  freeaddrinfo(res);
-
-  PDBG (bjnp_dbg (LOG_INFO, "bjnp_allocate_device: Scanner not yet in our list, added it: %s:%s\n", host, port));
-
-  /* Commit new device structure */
-
-  *dn = bjnp_no_devices;
-  bjnp_no_devices++;
-
-  /* return hostname if required */
-
-  if (resulting_host != NULL)
-    {
-      strcpy (resulting_host, host);
-    }
-
-  return BJNP_STATUS_GOOD;
-}
-
-static void add_scanner(SANE_Int *dev_no,
-                        const char *uri,
-			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[])
-
-{
-  char scanner_host[BJNP_HOST_MAX];
-  char serial[BJNP_SERIAL_MAX];
-  char makemodel[BJNP_IEEE1284_MAX];
-
-  /* Allocate device structure for scanner */
-  switch (bjnp_allocate_device (uri, dev_no, scanner_host))
-    {
-      case BJNP_STATUS_GOOD:
-        if (get_scanner_id (*dev_no, makemodel) != 0)
-          {
-            PDBG (bjnp_dbg (LOG_CRIT, "add_scanner: ERROR - Cannot read scanner make & model: %s\n",
-                             uri));
-          }
-        else
-          {
-          /*
-           * inform caller of found scanner
-           */
-
-           determine_scanner_serial (scanner_host, device[*dev_no].mac_address, serial);
-
-           attach_bjnp (uri, makemodel,
-                        serial, pixma_devices);
-           PDBG (bjnp_dbg (LOG_NOTICE, "add_scanner: New scanner added: %s, serial %s, mac address: %s.\n",
-	                 uri, serial, device[*dev_no].mac_address));
-          }
-        break;
-      case BJNP_STATUS_ALREADY_ALLOCATED:
-        PDBG (bjnp_dbg (LOG_NOTICE, "add_scanner: Scanner at %s was added before, good!\n",
-	                 uri));
-        break;
-
-      case BJNP_STATUS_INVAL:
-        PDBG (bjnp_dbg (LOG_NOTICE, "add_scanner: Scanner at %s can not be added\n",
-	                 uri));
-        break;
-    }
-}
-
-int add_default_timeout(char *uri, int timeout, int max_len)
-{
-  char method[BJNP_METHOD_MAX];
-  char host[BJNP_HOST_MAX];
-  char port_str[BJNP_PORT_MAX];
-  char args[BJNP_HOST_MAX];
-  int port;
-
-  if (split_uri(uri, method, host, port_str, args ) != 0)
-    {
-      return -1;
-    }
-
-  port = atoi(port_str);
-  if (port == 0)
-    {
-      port = 8612;
-    }
-
-  if (strstr(args, "timeout=") == NULL)
-    {
-      sprintf(args, "timeout=%d", timeout);
-    }
-
-  snprintf(uri, max_len -1, "%s://%s:%d/%s", method,host, port, args);
-  return 0;
-}
-
-
-/*
- * Public functions
- */
-
-/** Initialize sanei_bjnp.
- *
- * Call this before any other sanei_bjnp function.
- */
-extern void
-sanei_bjnp_init (void)
-{
-  DBG_INIT();
-  bjnp_no_devices = 0;
-}
-
-/**
- * Find devices that implement the bjnp protocol
- *
- * The function attach is called for every device which has been found.
- *
- * @param attach attach function
- *
- * @return SANE_STATUS_GOOD - on success (even if no scanner was found)
- */
-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[])
-{
-  int numbytes = 0;
-  struct BJNP_command cmd;
-  unsigned char resp_buf[2048];
-  struct DISCOVER_RESPONSE *disc_resp = ( struct DISCOVER_RESPONSE *) & resp_buf;
-  int socket_fd[BJNP_SOCK_MAX];
-  int no_sockets;
-  int i;
-  int j;
-  int attempt;
-  int last_socketfd = 0;
-  fd_set fdset;
-  fd_set active_fdset;
-  struct timeval timeout;
-  char scanner_host[256];
-  char uri[256];
-  int dev_no;
-  int port;
-  int timeout_default = BJNP_TIMEOUT_DEFAULT;
-  bjnp_sockaddr_t broadcast_addr[BJNP_SOCK_MAX];
-  bjnp_sockaddr_t scanner_sa;
-  socklen_t socklen;
-  bjnp_protocol_defs_t *protocol_defs;
-
-  memset( broadcast_addr, 0, sizeof( broadcast_addr) );
-  memset( &scanner_sa, 0 ,sizeof( scanner_sa ) );
-  PDBG (bjnp_dbg (LOG_INFO, "sanei_bjnp_find_devices, pixma backend version: %d.%d.%d\n",
-	PIXMA_VERSION_MAJOR, PIXMA_VERSION_MINOR, PIXMA_VERSION_BUILD));
-  bjnp_no_devices = 0;
-
-  for (i=0; i < BJNP_SOCK_MAX; i++)
-    {
-      socket_fd[i] = -1;
-    }
-
-  /* Add devices from config file */
-
-  if (conf_devices[0] == NULL)
-    PDBG (bjnp_dbg( LOG_DEBUG, "sanei_bjnp_find_devices: No devices specified in configuration file.\n" ) );
-
-  for (i = 0; conf_devices[i] != NULL; i++)
-    {
-      if (strncmp(conf_devices[i], "bjnp-timeout=", strlen("bjnp-timeout="))== 0)
-        {
-	  timeout_default = atoi(conf_devices[i] + strlen("bjnp-timeout=") );
-          if (timeout_default < BJNP_TIMEOUT_DEFAULT)
-	    {
-	      timeout_default = BJNP_TIMEOUT_DEFAULT;
-	    }
-	  PDBG ( bjnp_dbg
-                  (LOG_DEBUG, "Set new default timeout value: %d ms.", timeout_default));
-	  continue;
-	}
-      PDBG (bjnp_dbg
-	    (LOG_DEBUG, "sanei_bjnp_find_devices: Adding scanner from pixma.conf: %s\n", conf_devices[i]));
-      strncpy(uri, conf_devices[i], sizeof(uri));
-      add_default_timeout(uri, timeout_default, sizeof(uri));
-      add_scanner(&dev_no, uri, attach_bjnp, pixma_devices);
-    }
-  PDBG (bjnp_dbg
-	(LOG_DEBUG,
-	 "sanei_bjnp_find_devices: Added all configured scanners, now do auto detection...\n"));
-
-  /*
-   * Send UDP DISCOVER to discover scanners and return the list of scanners found
-   */
-
-  FD_ZERO (&fdset);
-
-  no_sockets = 0;
-#ifdef HAVE_IFADDRS_H
-  {
-    struct ifaddrs *interfaces = NULL;
-    struct ifaddrs *interface;
-    getifaddrs (&interfaces);
-
-    /* create a socket for each suitable interface */
-
-    interface = interfaces;
-    while ((no_sockets < BJNP_SOCK_MAX) && (interface != NULL))
-      {
-        if ( ! (interface -> ifa_flags & IFF_POINTOPOINT) &&
-            ( (socket_fd[no_sockets] =
-                      prepare_socket( interface -> ifa_name,
-                                      (bjnp_sockaddr_t *) interface -> ifa_addr,
-                                      (bjnp_sockaddr_t *) interface -> ifa_broadaddr,
-                                      &broadcast_addr[no_sockets] ) ) != -1 ) )
-          {
-            /* track highest used socket for later use in select */
-            if (socket_fd[no_sockets] > last_socketfd)
-              {
-                last_socketfd = socket_fd[no_sockets];
-              }
-            FD_SET (socket_fd[no_sockets], &fdset);
-            no_sockets++;
-          }
-        interface = interface->ifa_next;
-      }
-    freeifaddrs (interfaces);
-  }
-#else
-  /* we have no easy way to find interfaces with their broadcast addresses. */
-  /* use global broadcast and all-hosts instead */
-  {
-    bjnp_sockaddr_t local;
-    bjnp_sockaddr_t bc_addr;
-
-    memset( &local, 0, sizeof( local) );
-    local.ipv4.sin_family = AF_INET;
-    local.ipv4.sin_addr.s_addr = htonl (INADDR_ANY);
-
-    bc_addr.ipv4.sin_family = AF_INET;
-    bc_addr.ipv4.sin_port = htons(0);
-    bc_addr.ipv4.sin_addr.s_addr = htonl (INADDR_BROADCAST);
-
-    socket_fd[no_sockets] = prepare_socket( "any_interface",
-                                   &local,
-                                   &bc_addr,
-                                   &broadcast_addr[no_sockets] );
-    if (socket_fd[no_sockets] >= 0)
-      {
-        FD_SET (socket_fd[no_sockets], &fdset);
-        if (socket_fd[no_sockets] > last_socketfd)
-          {
-            last_socketfd = socket_fd[no_sockets];
-          }
-        no_sockets++;
-      }
-#ifdef ENABLE_IPV6
-    local.ipv6.sin6_family = AF_INET6;
-    local.ipv6.sin6_addr = in6addr_any;
-
-    socket_fd[no_sockets] = prepare_socket( "any_interface",
-                                   &local,
-                                   NULL,
-                                   &broadcast_addr[no_sockets] );
-    if (socket_fd[no_sockets] >= 0)
-      {
-        FD_SET (socket_fd[no_sockets], &fdset);
-        if (socket_fd[no_sockets] > last_socketfd)
-          {
-            last_socketfd = socket_fd[no_sockets];
-          }
-        no_sockets++;
-      }
-#endif
-  }
-#endif
-
-  /* send BJNP_MAX_BROADCAST_ATTEMPTS broadcasts on each prepared socket */
-  for (attempt = 0; attempt < BJNP_MAX_BROADCAST_ATTEMPTS; attempt++)
-    {
-      for ( i=0; i < no_sockets; i++)
-        {
-	  j = 0;
-          while(bjnp_protocol_defs[j].protocol_version != PROTOCOL_NONE)
-	    {
-	      set_cmd_from_string (bjnp_protocol_defs[j].proto_string, &cmd, CMD_UDP_DISCOVER, 0);
-              bjnp_send_broadcast ( socket_fd[i], &broadcast_addr[i],
-                                    bjnp_protocol_defs[j].default_port, cmd, sizeof (cmd));
-	      j++;
-	    }
-	}
-      /* wait for some time between broadcast packets */
-      usleep (BJNP_BROADCAST_INTERVAL * BJNP_USLEEP_MS);
-    }
-
-  /* wait for a UDP response */
-
-  timeout.tv_sec = 0;
-  timeout.tv_usec = BJNP_BC_RESPONSE_TIMEOUT * BJNP_USLEEP_MS;
-
-
-  active_fdset = fdset;
-
-  while (select (last_socketfd + 1, &active_fdset, NULL, NULL, &timeout) > 0)
-    {
-      PDBG (bjnp_dbg (LOG_DEBUG, "sanei_bjnp_find_devices: Select returned, time left %d.%d....\n",
-		       (int) timeout.tv_sec, (int) timeout.tv_usec));
-      for (i = 0; i < no_sockets; i++)
-	{
-	  if (FD_ISSET (socket_fd[i], &active_fdset))
-	    {
-              socklen =  sizeof(scanner_sa);
-	      if ((numbytes =
-		   recvfrom (socket_fd[i], resp_buf, sizeof (resp_buf), 0,
-                             &(scanner_sa.addr), &socklen ) ) == -1)
-		{
-		  PDBG (bjnp_dbg
-			(LOG_INFO, "sanei_find_devices: no data received"));
-		  break;
-		}
-	      else
-		{
-		  PDBG (bjnp_dbg (LOG_DEBUG2, "sanei_find_devices: Discover response:\n"));
-		  PDBG (bjnp_hexdump (LOG_DEBUG2, &resp_buf, numbytes));
-
-		  /* check if something sensible is returned */
-		  protocol_defs = get_protocol_by_proto_string(disc_resp-> response.BJNP_id);
-		  if ( (numbytes < (int)sizeof (struct BJNP_command)) ||
-		       (protocol_defs == NULL))
-		    {
-		      /* not a valid response, assume not a scanner  */
-
-                      char bjnp_id[5];
-                      strncpy(bjnp_id,  disc_resp-> response.BJNP_id, 4);
-                      bjnp_id[4] = '\0';
-                      PDBG (bjnp_dbg (LOG_INFO,
-                        "sanei_find_devices: Invalid discover response! Length = %d, Id = %s\n",
-                        numbytes, bjnp_id ) );
-		      break;
-		    }
-                  if ( !(disc_resp -> response.dev_type & 0x80) )
-                    {
-                      /* not a response, a command from somebody else or */
-                      /* a discover command that we generated */
-                      break;
-                    }
-		};
-
-	      port = get_port_from_sa(scanner_sa);
-	      /* scanner found, get IP-address or hostname */
-              get_scanner_name( &scanner_sa, scanner_host);
-
-	      /* construct URI */
-	      sprintf (uri, "%s://%s:%d/timeout=%d", protocol_defs->method_string, scanner_host,
-		           port, timeout_default);
-
-              add_scanner( &dev_no, uri, attach_bjnp, pixma_devices);
-
-	    }
-	}
-      active_fdset = fdset;
-      timeout.tv_sec = 0;
-      timeout.tv_usec = BJNP_BC_RESPONSE_TIMEOUT * BJNP_USLEEP_MS;
-    }
-  PDBG (bjnp_dbg (LOG_DEBUG, "sanei_find_devices: scanner discovery finished...\n"));
-
-  for (i = 0; i < no_sockets; i++)
-    close (socket_fd[i]);
-
-  return SANE_STATUS_GOOD;
-}
-
-/** 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:
- * type = 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)
-{
-  int result;
-
-  PDBG (bjnp_dbg (LOG_INFO, "sanei_bjnp_open(%s, %d):\n", devname, *dn));
-
-  result = bjnp_allocate_device (devname, dn, NULL);
-  if ( (result != BJNP_STATUS_GOOD) && (result != BJNP_STATUS_ALREADY_ALLOCATED ) ) {
-    return SANE_STATUS_INVAL;
-  }
-  return SANE_STATUS_GOOD;
-}
-
-/** Close a BJNP device.
- *
- * @param dn device number
- */
-
-void
-sanei_bjnp_close (SANE_Int dn)
-{
-  PDBG (bjnp_dbg (LOG_INFO, "sanei_bjnp_close(%d):\n", dn));
-
-  device[dn].open = 0;
-  sanei_bjnp_deactivate(dn);
-}
-
-/** Activate BJNP device connection
- *
- * @param dn device number
- */
-
-SANE_Status
-sanei_bjnp_activate (SANE_Int dn)
-{
-  char hostname[256];
-  char pid_str[64];
-
-  PDBG (bjnp_dbg (LOG_INFO, "sanei_bjnp_activate (%d)\n", dn));
-  gethostname (hostname, 256);
-  hostname[255] = '\0';
-  sprintf (pid_str, "Process ID = %d", getpid ());
-
-  bjnp_send_job_details (dn, hostname, getusername (), pid_str);
-
-  if (bjnp_open_tcp (dn) != 0)
-    {
-      return SANE_STATUS_INVAL;
-    }
-
-  return SANE_STATUS_GOOD;
-}
-
-/** Deactivate BJNP device connection
- *
- * @paran dn device number
- */
-
-SANE_Status
-sanei_bjnp_deactivate (SANE_Int dn)
-{
-  PDBG (bjnp_dbg (LOG_INFO, "sanei_bjnp_deactivate (%d)\n", dn));
-  if ( device[dn].tcp_socket != -1)
-    {
-      bjnp_finish_job (dn);
-      close (device[dn].tcp_socket);
-      device[dn].tcp_socket = -1;
-    }
-  return SANE_STATUS_GOOD;
-}
-
-/** Set the timeout for interrupt reads.
- *  we do not use it for bulk reads!
- * @param timeout the new timeout in ms
- */
-extern void
-sanei_bjnp_set_timeout (SANE_Int devno, SANE_Int timeout)
-{
-  if (timeout < device[devno].bjnp_min_timeout)
-    {
-      PDBG (bjnp_dbg (LOG_INFO, "bjnp_set_timeout to %d, but using minimum value %d\n",
-        timeout, device[devno].bjnp_min_timeout));
-      timeout = device[devno].bjnp_min_timeout;
-    } else {
-      PDBG (bjnp_dbg (LOG_INFO, "bjnp_set_timeout to %d\n",
-		   timeout));
-    }
-
-  device[devno].bjnp_timeout = 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)
-{
-  SANE_Status result;
-  SANE_Status error;
-  size_t recvd;
-  size_t read_size;
-  size_t read_size_max;
-  size_t requested;
-
-  PDBG (bjnp_dbg
-	(LOG_INFO, "bjnp_read_bulk(dn=%d, bufferptr=%lx, 0x%lx = %ld)\n", dn,
-	 (long) buffer, (unsigned long) *size, (unsigned long) *size));
-
-  recvd = 0;
-  requested = *size;
-
-  PDBG (bjnp_dbg
-	(LOG_DEBUG, "bjnp_read_bulk: 0x%lx = %ld bytes available at start\n",
-	 (unsigned long) device[dn].scanner_data_left,
-	 (unsigned long) device[dn].scanner_data_left ) );
-
-  while ( (recvd < requested) && !( device[dn].last_block && (device[dn].scanner_data_left == 0)) )
-    {
-      PDBG (bjnp_dbg
-	    (LOG_DEBUG,
-	     "bjnp_read_bulk: Already received 0x%lx = %ld bytes, backend requested 0x%lx = %ld bytes\n",
-	     (unsigned long) recvd, (unsigned long) recvd,
-	     (unsigned long) requested, (unsigned long)requested ));
-
-      /* Check first if there is data in flight from the scanner */
-
-      if (device[dn].scanner_data_left == 0)
-        {
-	  /* There is no data in flight from the scanner, send new read request */
-
-          PDBG (bjnp_dbg (LOG_DEBUG,
-                          "bjnp_read_bulk: No (more) scanner data available, requesting more( blocksize = %ld = %lx\n",
-                          (long int) device[dn].blocksize, (long int) device[dn].blocksize ));
-
-          if ((error = bjnp_send_read_request (dn)) != SANE_STATUS_GOOD)
-            {
-              *size = recvd;
-              return SANE_STATUS_IO_ERROR;
-            }
-          if ( ( error = bjnp_recv_header (dn, &(device[dn].scanner_data_left) )  ) != SANE_STATUS_GOOD)
-            {
-              *size = recvd;
-              return SANE_STATUS_IO_ERROR;
-            }
-          /* correct blocksize if applicable */
-
-          device[dn].blocksize = MAX (device[dn].blocksize, device[dn].scanner_data_left);
-
-          if ( device[dn].scanner_data_left < device[dn].blocksize)
-            {
-              /* the scanner will not react at all to a read request, when no more data is available */
-              /* we now determine end of data by comparing the payload size to the maximun blocksize */
-              /* this block is shorter than blocksize, so after this block we are done */
-
-              device[dn].last_block = 1;
-            }
-        }
-
-      PDBG (bjnp_dbg (LOG_DEBUG, "bjnp_read_bulk: In flight: 0x%lx = %ld bytes available\n",
-		 (unsigned long) device[dn].scanner_data_left,
-		 (unsigned long) device[dn].scanner_data_left));
-
-       /* read as many bytes as needed and available */
-
-      read_size_max = MIN( device[dn].scanner_data_left, (requested - recvd) );
-      read_size = read_size_max;
-
-      PDBG (bjnp_dbg
-	    (LOG_DEBUG,
-	     "bjnp_read_bulk: Try to read 0x%lx = %ld (of max 0x%lx = %ld) bytes\n",
-	     (unsigned long) read_size_max,
-	     (unsigned long) read_size_max,
-	     (unsigned long) device[dn].scanner_data_left,
-	     (unsigned long) device[dn].scanner_data_left) );
-
-      result = bjnp_recv_data (dn, buffer , recvd, &read_size);
-      if (result != SANE_STATUS_GOOD)
-	{
-	  *size = recvd;
-	  return SANE_STATUS_IO_ERROR;
-	}
-      PDBG (bjnp_dbg (LOG_DEBUG, "bjnp_read_bulk: Expected at most %ld bytes, received this time: %ld\n",
-            read_size_max, read_size) );
-
-      device[dn].scanner_data_left = device[dn].scanner_data_left - read_size;
-      recvd = recvd + read_size;
-    }
-
-  PDBG (bjnp_dbg (LOG_DEBUG, "bjnp_read_bulk: %s: Returning %ld bytes, backend expexts %ld\n",
-        (recvd == *size)? "OK": "NOTICE",recvd, *size ) );
-  *size = recvd;
-  if ( *size == 0 )
-    return SANE_STATUS_EOF;
-  return SANE_STATUS_GOOD;
-}
-
-/** 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)
-{
-  ssize_t sent;
-  size_t recvd;
-  uint32_t buf;
-  size_t payload_size;
-
-  /* Write received data to scanner */
-
-  sent = bjnp_write (dn, buffer, *size);
-  if (sent < 0)
-    return SANE_STATUS_IO_ERROR;
-  if (sent != (int) *size)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT, "sanei_bjnp_write_bulk: ERROR - Sent only %ld bytes to scanner, expected %ld!!\n",
-	     (unsigned long) sent, (unsigned long) *size));
-      return SANE_STATUS_IO_ERROR;
-    }
-
-  if (bjnp_recv_header (dn, &payload_size) != SANE_STATUS_GOOD)
-    {
-      PDBG (bjnp_dbg (LOG_CRIT, "sanei_bjnp_write_bulk: ERROR - Could not read response to command!\n"));
-      return SANE_STATUS_IO_ERROR;
-    }
-
-  if (payload_size != 4)
-    {
-      PDBG (bjnp_dbg (LOG_CRIT,
-		       "sanei_bjnp_write_bulk: ERROR - Scanner length of write confirmation = 0x%lx bytes = %ld, expected %d!!\n",
-		       (unsigned long) payload_size,
-		       (unsigned long) payload_size, 4));
-      return SANE_STATUS_IO_ERROR;
-    }
-  recvd = payload_size;
-  if ((bjnp_recv_data (dn, (unsigned char *) &buf, 0, &recvd) !=
-       SANE_STATUS_GOOD) || (recvd != payload_size))
-    {
-      PDBG (bjnp_dbg (LOG_CRIT,
-		       "sanei_bjnp_write_bulk: ERROR - Could not read length of data confirmed by device\n"));
-      return SANE_STATUS_IO_ERROR;
-    }
-  recvd = ntohl (buf);
-  if (recvd != *size)
-    {
-      PDBG (bjnp_dbg
-	    (LOG_CRIT, "sanei_bjnp_write_bulk: ERROR - Scanner confirmed %ld bytes, expected %ld!!\n",
-	     (unsigned long) recvd, (unsigned long) *size));
-      return SANE_STATUS_IO_ERROR;
-    }
-  /* we can expect data from the scanner */
-
-  device[dn].last_block = 0;
-
-  return SANE_STATUS_GOOD;
-}
-
-/** 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)
-{
-#ifndef PIXMA_BJNP_USE_STATUS
-  PDBG (bjnp_dbg
-	(LOG_INFO, "bjnp_read_int(%d, bufferptr, 0x%lx = %ld):\n", dn,
-	 (unsigned long) *size, (unsigned long) *size));
-
-  memset (buffer, 0, *size);
-  sleep (1);
-  return SANE_STATUS_IO_ERROR;
-#else
-
-  char hostname[256];
-  int resp_len;
-  int timeout;
-  int seconds;
-
-  PDBG (bjnp_dbg
-	(LOG_INFO, "bjnp_read_int(%d, bufferptr, 0x%lx = %ld):\n", dn,
-	 (unsigned long) *size, (unsigned long) *size));
-
-  memset (buffer, 0, *size);
-
-  gethostname (hostname, 32);
-  hostname[32] = '\0';
-
-
-  switch (device[dn].polling_status)
-    {
-    case BJNP_POLL_STOPPED:
-
-      /* establish dialog */
-
-      if ( (bjnp_poll_scanner (dn, 0, hostname, getusername (), buffer, *size ) != 0) ||
-           (bjnp_poll_scanner (dn, 1, hostname, getusername (), buffer, *size ) != 0) )
-        {
-	  PDBG (bjnp_dbg (LOG_NOTICE, "bjnp_read_int: WARNING - Failed to setup read_intr dialog with device!\n"));
-          device[dn].dialog = 0;
-          device[dn].status_key = 0;
-          return SANE_STATUS_IO_ERROR;
-        }
-      device[dn].polling_status = BJNP_POLL_STARTED;
-
-      /* fall through to BJNP_POLL_STARTED */
-
-    case BJNP_POLL_STARTED:
-      /* we use only seonds accuracy between poll attempts */
-      timeout = device[dn].bjnp_timeout /1000;
-
-      do
-        {
-          if ( (resp_len = bjnp_poll_scanner (dn, 2, hostname, getusername (), buffer, *size ) ) < 0 )
-            {
-              PDBG (bjnp_dbg (LOG_NOTICE, "bjnp_read_int: Restarting polling dialog!\n"));
-              device[dn].polling_status = BJNP_POLL_STOPPED;
-              *size = 0;
-              return SANE_STATUS_EOF;
-            }
-          *size = (size_t) resp_len;
-          if ( resp_len > 0 )
-            {
-              device[dn].polling_status = BJNP_POLL_STATUS_RECEIVED;
-              return SANE_STATUS_GOOD;
-            }
-          seconds = timeout > 2 ? 2 : timeout;
-          sleep(seconds);
-          timeout = timeout - seconds;
-        } while ( timeout > 0 ) ;
-      break;
-    case BJNP_POLL_STATUS_RECEIVED:
-       if ( (resp_len = bjnp_poll_scanner (dn, 5, hostname, getusername (), buffer, *size ) ) < 0 )
-        {
-          PDBG (bjnp_dbg (LOG_NOTICE, "bjnp_read_int: Restarting polling dialog!\n"));
-          device[dn].polling_status = BJNP_POLL_STOPPED;
-          *size = 0;
-          break;
-        }
-    }
-  return SANE_STATUS_EOF;
-#endif
-}