selphy_print/backend_common.c

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/*
* CUPS Backend common code
*
* (c) 2013 Solomon Peachy <pizza@shaftnet.org>
*
* The latest version of this program can be found at:
*
* http://git.shaftnet.org/git/gitweb.cgi?p=selphy_print.git
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* [http://www.gnu.org/licenses/gpl-3.0.html]
*
*/
#include <libusb-1.0/libusb.h>
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#include <arpa/inet.h>
#define BACKEND_VERSION "0.5"
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#define STR_LEN_MAX 64
#define DEBUG( ... ) fprintf(stderr, "DEBUG: " __VA_ARGS__ )
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#define DEBUG2( ... ) fprintf(stderr, __VA_ARGS__ )
#define INFO( ... ) fprintf(stderr, "INFO: " __VA_ARGS__ )
#define ERROR( ... ) do { fprintf(stderr, "ERROR: " __VA_ARGS__ ); sleep(1); } while (0)
#if (__BYTE_ORDER == __LITTLE_ENDIAN)
#define le32_to_cpu(__x) __x
#define le16_to_cpu(__x) __x
#define be16_to_cpu(__x) ntohs(__x)
#define be32_to_cpu(__x) ntohl(__x)
#else
#define le32_to_cpu(x) \
({ \
uint32_t __x = (x); \
((uint32_t)( \
(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
})
#define le16_to_cpu(x) \
({ \
uint16_t __x = (x); \
((uint16_t)( \
(((uint16_t)(__x) & (uint16_t)0x00ff) << 8) | \
(((uint16_t)(__x) & (uint16_t)0xff00) >> 8) | \
})
#define be32_to_cpu(__x) __x
#define be16_to_cpu(__x) __x
#endif
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#define cpu_to_le16 le16_to_cpu
#define cpu_to_le32 le32_to_cpu
#define cpu_to_be16 be16_to_cpu
#define cpu_to_be32 be32_to_cpu
#define ID_BUF_SIZE 2048
static char *get_device_id(struct libusb_device_handle *dev)
{
int length;
int claimed = 0;
int iface = 0;
char *buf = malloc(ID_BUF_SIZE + 1);
claimed = libusb_kernel_driver_active(dev, iface);
if (claimed)
libusb_detach_kernel_driver(dev, iface);
libusb_claim_interface(dev, iface);
if (libusb_control_transfer(dev,
LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_ENDPOINT_IN |
LIBUSB_RECIPIENT_INTERFACE,
0, 0,
(iface << 8),
(unsigned char *)buf, ID_BUF_SIZE, 5000) < 0)
{
*buf = '\0';
goto done;
}
/* length is the first two bytes, MSB first */
length = (((unsigned)buf[0] & 255) << 8) |
((unsigned)buf[1] & 255);
/* Sanity checks */
if (length > ID_BUF_SIZE || length < 14)
length = (((unsigned)buf[1] & 255) << 8) |
((unsigned)buf[0] & 255);
if (length > ID_BUF_SIZE)
length = ID_BUF_SIZE;
if (length < 14) {
*buf = '\0';
goto done;
}
/* Move, and terminate */
memmove(buf, buf + 2, length);
buf[length] = '\0';
done:
libusb_release_interface(dev, iface);
if (claimed)
libusb_attach_kernel_driver(dev, iface);
return buf;
}
static int send_data(struct libusb_device_handle *dev, uint8_t endp,
uint8_t *buf, int len)
{
int num;
while (len) {
int ret = libusb_bulk_transfer(dev, endp,
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buf, (len > 65536) ? 65536: len,
&num, 5000);
if (ret < 0) {
ERROR("Failure to send data to printer (libusb error %d: (%d/%d to 0x%02x))\n", ret, num, len, endp);
return ret;
}
len -= num;
buf += num;
// DEBUG("Sent %d (%d remaining) to 0x%x\n", num, len, endp);
}
return 0;
}
static int terminate = 0;
static void sigterm_handler(int signum) {
terminate = 1;
INFO("Job Cancelled");
}
static char *sanitize_string(char *str) {
int len = strlen(str);
while(len && (str[len-1] <= 0x20)) {
str[len-1] = 0;
len--;
}
return str;
}
static int print_scan_output(struct libusb_device *device,
struct libusb_device_descriptor *desc,
char *prefix, char *manuf2,
int found, int match,
int scan_only, char *match_serno)
{
struct libusb_device_handle *dev;
unsigned char product[STR_LEN_MAX] = "";
unsigned char serial[STR_LEN_MAX] = "";
unsigned char manuf[STR_LEN_MAX] = "";
if (libusb_open(device, &dev)) {
ERROR("Could not open device %04x:%04x\n", desc->idVendor, desc->idProduct);
found = -1;
goto abort;
}
/* Query detailed info */
if (desc->iManufacturer) {
libusb_get_string_descriptor_ascii(dev, desc->iManufacturer, manuf, STR_LEN_MAX);
sanitize_string((char*)manuf);
}
if (desc->iProduct) {
libusb_get_string_descriptor_ascii(dev, desc->iProduct, product, STR_LEN_MAX);
sanitize_string((char*)product);
}
if (desc->iSerialNumber) {
libusb_get_string_descriptor_ascii(dev, desc->iSerialNumber, serial, STR_LEN_MAX);
sanitize_string((char*)serial);
}
if (!strlen((char*)serial)) {
uint8_t bus_num;
uint8_t port_num;
bus_num = libusb_get_bus_number(device);
port_num = libusb_get_port_number(device);
sprintf((char*)serial, "NONE_B%03d_D%03d", bus_num, port_num);
}
DEBUG("%sPID: %04X Manuf: '%s' Product: '%s' Serial: '%s'\n",
match ? "MATCH: " : "",
desc->idProduct, manuf, product, serial);
if (scan_only) {
/* URL-ify model. */
char buf[128]; // XXX ugly..
int j = 0, k = 0;
char *ieee_id = get_device_id(dev);
while (*(product + j + strlen(manuf2))) {
buf[k] = *(product + j + (strlen(manuf2) ? (strlen(manuf2) + 1) : 0));
if(buf[k] == ' ') {
buf[k++] = '%';
buf[k++] = '2';
buf[k] = '0';
}
k++;
j++;
}
buf[k] = 0;
fprintf(stdout, "direct %s%s/%s?serial=%s \"%s\" \"%s\" \"%s\" \"\"\n",
prefix, strlen(manuf2) ? manuf2 : (char*)manuf,
buf, serial, product, product,
ieee_id);
if (ieee_id)
free(ieee_id);
}
/* If a serial number was passed down, use it. */
if (found && match_serno &&
strcmp(match_serno, (char*)serial)) {
found = -1;
}
libusb_close(dev);
abort:
return found;
}