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-rw-r--r--backend/pixma_bjnp.c2356
1 files changed, 2356 insertions, 0 deletions
diff --git a/backend/pixma_bjnp.c b/backend/pixma_bjnp.c
new file mode 100644
index 0000000..3046e9d
--- /dev/null
+++ b/backend/pixma_bjnp.c
@@ -0,0 +1,2356 @@
+/* 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
+
+/*
+ * 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_SELSECT_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"
+
+
+/* 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;
+
+ strcpy (s, scanner_id);
+ model[0] = '\0';
+
+ tok = strtok (s, ";");
+ while (tok != NULL)
+ {
+ /* MDL contains make and model */
+
+ if (strncmp (tok, "MDL:", 4) == 0)
+ {
+ strcpy (model, tok + 4);
+ 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 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);
+ while (strlen (copy) >= SHORT_HOSTNAME_MAX)
+ {
+ /* if this is a FQDN, not an ip-address, remove domain part of the name */
+ if ((dot = strchr (copy, '.')) != NULL)
+ {
+ *dot = '\0';
+ }
+ else
+ strcpy(copy, mac_address);
+ break;
+ }
+ 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: 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: 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;
+
+ strcpy (copy, devname);
+ 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, "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, "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, "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, "Can not find port in %s (have \"%s\")\n", devname, start));
+ return -1;
+ }
+ strcpy(port, start);
+ }
+
+/*
+ * Retrieve arguments
+ */
+
+ if (next == '/')
+ {
+ i = strlen(start);
+ if ( i >= BJNP_ARGS_MAX)
+ {
+ PDBG (bjnp_dbg (LOG_NOTICE, "Argument string too long in %s\n", devname));
+ }
+ strcpy (args, start);
+ }
+ else
+ strcpy (args, "");
+ return 0;
+}
+
+
+
+static void
+set_cmd (int devno, struct BJNP_command *cmd, char cmd_code, int payload_len)
+{
+ /*
+ * Set command buffer with command code, session_id and lenght of payload
+ * Returns: sequence number of command
+ */
+ strncpy (cmd->BJNP_id, BJNP_STRING, sizeof (cmd->BJNP_id));
+ cmd->dev_type = BJNP_CMD_SCAN;
+ cmd->cmd_code = cmd_code;
+ cmd->unknown1 = htons (0);
+ if (devno == -1)
+ {
+ /* device not yet opened, use 0 for serial and session) */
+ cmd->seq_no = htons (0);
+ cmd->session_id = htons (0);
+ }
+ else
+ {
+ 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: 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: 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: 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: 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 = BJNP_TIMEOUT_UDP;
+ timeout.tv_usec = 0;
+ }
+ 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: 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: recv failed: %s",
+ strerror (errno)));
+ continue;
+ }
+ close(sockfd);
+ return numbytes;
+ }
+
+ /* no response even after retry */
+
+ close(sockfd);
+ PDBG (bjnp_dbg
+ (LOG_CRIT, "udp_command: no data received\n" ) );
+ 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 (dev_no, &cmd, CMD_UDP_GET_ID, 0);
+
+ PDBG (bjnp_dbg (LOG_DEBUG2, "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, "Failed to retrieve scanner identity:\n"));
+ return -1;
+ }
+ PDBG (bjnp_dbg (LOG_DEBUG2, "scanner identity:\n"));
+ PDBG (bjnp_hexdump (LOG_DEBUG2, resp_buf, resp_len));
+
+ id = (struct IDENTITY *) resp_buf;
+
+ /* truncate string to be safe */
+ id_len = htons( id-> id_len ) - sizeof(id->id_len);
+ id->id[id_len] = '\0';
+ strcpy (scanner_id, id->id);
+
+ PDBG (bjnp_dbg (LOG_INFO, "Scanner identity string = %s - lenght = %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, "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
+ */
+
+ 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, "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,
+ "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,
+ "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, "Forward lookup of %s failed, using IP-address", ip_address));
+ strcpy (host, ip_address);
+ }
+ }
+ return level;
+}
+
+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: 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: 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: 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: 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,
+ "%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,
+ "%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) );
+ dest_sa -> ipv4.sin_port = htons(BJNP_PORT_SCAN);
+ if ( (socket = create_broadcast_socket( &local_sa_copy) ) != -1)
+ {
+ PDBG (bjnp_dbg (LOG_INFO, "%s is IPv4 capable, sending broadcast, socket = %d\n",
+ if_name, socket));
+ }
+ else
+ {
+ PDBG (bjnp_dbg (LOG_INFO, "%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,
+ "%s is not a valid IPv6 interface, skipping...\n",
+ if_name));
+ return -1;
+ }
+ else
+ {
+ dest_sa -> ipv6.sin6_family = AF_INET6;
+ dest_sa -> ipv6.sin6_port = htons(BJNP_PORT_SCAN);
+ 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, "%s is IPv6 capable, sending broadcast, socket = %d\n",
+ if_name, socket));
+ }
+ else
+ {
+ PDBG (bjnp_dbg (LOG_INFO, "%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,
+ struct BJNP_command cmd, int size)
+{
+ int num_bytes;
+
+ /* set address to send packet to */
+ /* usebroadcast address of interface */
+
+ if ((num_bytes = sendto (sockfd, &cmd, size, 0,
+ &(broadcast_addr->addr),
+ sa_size( broadcast_addr)) ) != size)
+ {
+ PDBG (bjnp_dbg (LOG_INFO,
+ "bjnp_send_broadcast: Socket: %d: 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 (devno, &cmd, CMD_UDP_CLOSE, 0);
+
+ PDBG (bjnp_dbg (LOG_DEBUG2, "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,
+ "Received %d characters on close scanjob command, expected %d\n",
+ resp_len, (int) sizeof (struct BJNP_command)));
+ return;
+ }
+ PDBG (bjnp_dbg (LOG_DEBUG2, "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 (devno, (struct BJNP_command *) cmd_buf, CMD_UDP_POLL,
+ len);
+
+ buf_len = len + sizeof(struct BJNP_command);
+ PDBG (bjnp_dbg (LOG_DEBUG2, "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, "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, "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 (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, "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, "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 (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, "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 scandata 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 (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: 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 (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: 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 = BJNP_TIMEOUT_TCP;
+ timeout.tv_usec = 0;
+ }
+ 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: 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: could not read response header (select timed out)!\n" ) );
+ 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;
+ PDBG (bjnp_dbg (LOG_CRIT,
+ "bjnp_recv_header: (recv) could not read response header, received %d bytes!\n",
+ recv_bytes));
+ PDBG (bjnp_dbg
+ (LOG_CRIT, "bjnp_recv_header: (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 scanner data */
+
+
+ *payload_size = ntohl (resp_buf.payload_len);
+ PDBG (bjnp_dbg
+ (LOG_DEBUG, "TCP response header(scanner 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 )
+{
+ /* 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].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 = 0;
+ device[dn].scanner_data_left = 0;
+ device[dn].last_cmd = 0;
+ device[dn].blocksize = 2048; /* safe assumption, we start low */
+ 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, "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 * len)
+{
+/*
+ * This function receives the responses to the write commands.
+ * NOTE: len may not exceed SSIZE_MAX (as that is max for recv)
+ * 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: receiving response data\n"));
+ fd = device[devno].tcp_socket;
+
+ PDBG (bjnp_dbg
+ (LOG_DEBUG, "bjnp_recv_data: read response payload (%ld bytes max)\n",
+ (unsigned long) *len));
+
+ 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 = BJNP_TIMEOUT_TCP;
+ timeout.tv_usec = 0;
+ }
+ 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: could not read response payload (select): %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: could not read response payload (select timed out): %s!\n",
+ strerror (terrno)));
+ errno = terrno;
+ *len = 0;
+ return SANE_STATUS_IO_ERROR;
+ }
+
+ if ((recv_bytes = recv (fd, buffer, *len, 0)) < 0)
+ {
+ terrno = errno;
+ PDBG (bjnp_dbg (LOG_CRIT,
+ "bjnp_recv_data: could not read response payload (recv): %s!\n",
+ strerror (errno)));
+ errno = terrno;
+ *len = 0;
+ return SANE_STATUS_IO_ERROR;
+ }
+ PDBG (bjnp_dbg (LOG_DEBUG2, "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 *res_host)
+{
+ char method[BJNP_METHOD_MAX];
+ char host[BJNP_HOST_MAX];
+ char port[BJNP_PORT_MAX] = "";
+ char args[BJNP_ARGS_MAX];
+ struct addrinfo *res, *cur;
+ struct addrinfo hints;
+ int result;
+ int i;
+
+ 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)
+ {
+ PDBG (bjnp_dbg
+ (LOG_CRIT,
+ "URI may not contain userid, password or aguments: %s\n",
+ devname));
+
+ return BJNP_STATUS_INVAL;
+ }
+ if (strcmp (method, BJNP_METHOD) != 0)
+ {
+ PDBG (bjnp_dbg
+ (LOG_CRIT, "URI %s contains invalid method: %s\n", devname,
+ method));
+ return BJNP_STATUS_INVAL;
+ }
+
+ if (strlen(port) == 0)
+ {
+ sprintf( port, "%d", BJNP_PORT_SCAN );
+ }
+
+ 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, "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,
+ "Too many devices, ran out of device structures, can not add %s\n",
+ devname));
+ freeaddrinfo(res);
+ return BJNP_STATUS_INVAL;
+ }
+ if (bjnp_init_device_structure( bjnp_no_devices, (bjnp_sockaddr_t *)cur -> ai_addr) != 0)
+ {
+ /* giving up on this address, try next one if any */
+ break;
+ }
+ for (i = 0; i < bjnp_no_devices; i++)
+ {
+ /* we check for matching addresses as wel as matching mac_addresses as */
+ /* an IPv6 host can have multiple adresses */
+
+ if ( (sa_is_equal( device[i].addr, (bjnp_sockaddr_t *)cur -> ai_addr) ) ||
+ ( 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;
+ }
+ 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, "Scanner not yet in our list, added it: %s:%s\n", host, port));
+
+ /* return hostname if required */
+
+ if (res_host != NULL)
+ {
+ strcpy (res_host, host);
+ }
+ *dn = bjnp_no_devices;
+
+ /* Commit new device structure */
+
+ bjnp_no_devices++;
+
+ 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, "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);
+ }
+ break;
+ case BJNP_STATUS_ALREADY_ALLOCATED:
+ PDBG (bjnp_dbg (LOG_NOTICE, "Scanner at %s was added before, good!\n",
+ uri));
+ break;
+
+ case BJNP_STATUS_INVAL:
+ PDBG (bjnp_dbg (LOG_NOTICE, "Scanner at %s can not be added\n",
+ uri));
+ break;
+ }
+}
+
+
+/*
+ * 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 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;
+ bjnp_sockaddr_t broadcast_addr[BJNP_SOCK_MAX];
+ bjnp_sockaddr_t scanner_sa;
+ socklen_t socklen;
+
+ memset( broadcast_addr, 0, sizeof( broadcast_addr) );
+ memset( &scanner_sa, 0 ,sizeof( scanner_sa ) );
+ PDBG (bjnp_dbg (LOG_INFO, "sanei_bjnp_find_devices:\n"));
+ bjnp_no_devices = 0;
+
+ for (i=0; i < BJNP_SOCK_MAX; i++)
+ {
+ socket_fd[i] = -1;
+ }
+ /* First add devices from config file */
+
+ if (conf_devices[0] == NULL)
+ PDBG (bjnp_dbg( LOG_DEBUG, "No devices specified in configuration file.\n" ) );
+
+ for (i = 0; conf_devices[i] != NULL; i++)
+ {
+ PDBG (bjnp_dbg
+ (LOG_DEBUG, "Adding scanner from pixma.conf: %s\n", conf_devices[i]));
+ add_scanner(&dev_no, conf_devices[i], attach_bjnp, pixma_devices);
+ }
+ PDBG (bjnp_dbg
+ (LOG_DEBUG,
+ "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);
+ set_cmd (-1, &cmd, CMD_UDP_DISCOVER, 0);
+
+ 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(BJNP_PORT_SCAN);
+ 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++)
+ {
+ bjnp_send_broadcast ( socket_fd[i], &broadcast_addr[i], cmd, sizeof (cmd));
+ }
+ /* 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, "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, "find_devices: no data received"));
+ break;
+ }
+ else
+ {
+ PDBG (bjnp_dbg (LOG_DEBUG2, "Discover response:\n"));
+ PDBG (bjnp_hexdump (LOG_DEBUG2, &resp_buf, numbytes));
+
+ /* check if something sensible is returned */
+ if ( (numbytes < (int)sizeof (struct BJNP_command)) ||
+ (strncmp ("BJNP", disc_resp-> response.BJNP_id, 4) != 0))
+ {
+ /* 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,
+ "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;
+ }
+ };
+
+ /* scanner found, get IP-address or hostname */
+ get_scanner_name( &scanner_sa, scanner_host);
+
+ /* construct URI */
+ sprintf (uri, "%s://%s:%d", BJNP_METHOD, scanner_host,
+ BJNP_PORT_SCAN);
+
+ 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, "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 sanei_bjnp_activate( *dn);;
+}
+
+/** 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));
+ sanei_bjnp_deactivate(dn);
+ device[dn].open = 0;
+}
+
+/** 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));
+
+ bjnp_finish_job (dn);
+
+ if ( device[dn].tcp_socket != -1)
+ {
+ 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)
+{
+ 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 more;
+ size_t requested;
+
+ PDBG (bjnp_dbg
+ (LOG_INFO, "bjnp_read_bulk(%d, bufferptr, 0x%lx = %ld)\n", dn,
+ (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,
+ "Received 0x%lx = %ld bytes, backend requested 0x%lx = %ld bytes\n",
+ (unsigned long) recvd, (unsigned long) recvd,
+ (unsigned long) requested, (unsigned long)requested ));
+
+ if (device[dn].scanner_data_left == 0)
+ {
+ /* send new read request */
+
+ PDBG (bjnp_dbg (LOG_DEBUG,
+ "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;
+ }
+ if ( device[dn].scanner_data_left == 0 )
+ {
+ break;
+ }
+ }
+
+ PDBG (bjnp_dbg (LOG_DEBUG, "Scanner reports 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 */
+
+ more = MIN( device[dn].scanner_data_left, (requested - recvd) );
+
+ PDBG (bjnp_dbg
+ (LOG_DEBUG,
+ "reading 0x%lx = %ld (of max 0x%lx = %ld) bytes\n",
+ (unsigned long) more,
+ (unsigned long) more,
+ (unsigned long) device[dn].scanner_data_left,
+ (unsigned long) device[dn].scanner_data_left) );
+
+ result = bjnp_recv_data (dn, buffer + recvd, &more);
+ if (result != SANE_STATUS_GOOD)
+ {
+ *size = recvd;
+ return SANE_STATUS_IO_ERROR;
+ }
+ PDBG (bjnp_dbg (LOG_DEBUG, "Requested %ld bytes, received: %ld\n",
+ MIN( device[dn].scanner_data_left, (requested - recvd) ), more) );
+
+ device[dn].scanner_data_left = device[dn].scanner_data_left - more;
+ recvd = recvd + more;
+ }
+
+ PDBG (bjnp_dbg (LOG_DEBUG, "returning %ld bytes, backend expexts %ld\n",
+ 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;
+
+ PDBG (bjnp_dbg
+ (LOG_INFO, "bjnp_write_bulk(%d, bufferptr, 0x%lx = %ld)\n", dn,
+ (unsigned long) *size, (unsigned long) *size));
+ sent = bjnp_write (dn, buffer, *size);
+ if (sent < 0)
+ return SANE_STATUS_IO_ERROR;
+ if (sent != (int) *size)
+ {
+ PDBG (bjnp_dbg
+ (LOG_CRIT, "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, "Could not read response to command!\n"));
+ return SANE_STATUS_IO_ERROR;
+ }
+
+ if (payload_size != 4)
+ {
+ PDBG (bjnp_dbg (LOG_CRIT,
+ "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, &recvd) !=
+ SANE_STATUS_GOOD) || (recvd != payload_size))
+ {
+ PDBG (bjnp_dbg (LOG_CRIT,
+ "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, "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 again */
+
+ 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, "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;
+
+ 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, "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;
+
+ /* this is a bit of a hack, but the scanner does not like */
+ /* us to continue using the existing tcp socket */
+
+ sanei_bjnp_deactivate(dn);
+ sanei_bjnp_activate(dn);
+
+ 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, "Restarting polling dialog!\n"));
+ device[dn].polling_status = BJNP_POLL_STOPPED;
+ *size = 0;
+ break;
+ }
+ }
+ return SANE_STATUS_EOF;
+#endif
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 11:34:37 +0000