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common: Slightly more robust Manufacturer/Model/Serial parsing 

* Better comments
 * Get rid of dead code paths
 * Skip Manuf/Model query when using new-style URIs
 * If IEEE1284 produces bogus ID, fall back to USB descriptor
 * If both produce bogus ID, always report.
master
Solomon Peachy 2021-04-28 22:33:29 -04:00
parent eef0f22a38
commit 85b778893e
1 changed files with 41 additions and 25 deletions
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66
backend_common.c
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@ -29,7 +29,7 @@
#include <signal.h>
#include <strings.h> /* For strncasecmp */
#define BACKEND_VERSION "0.111"
#define BACKEND_VERSION "0.112"
#ifndef CORRTABLE_PATH
#ifdef PACKAGE_DATA_DIR
@ -466,7 +466,9 @@ static int probe_device(struct libusb_device *device,
continue;
}
#if 1
/* Note we actually only match on explicit VID+PIDs so there's no need to filter based
on specific class/type */
/* Explicitly exclude IPP-over-USB interfaces */
if (desc->bDeviceClass == LIBUSB_CLASS_PER_INTERFACE &&
config->interface[iface].altsetting[altset].bInterfaceClass == LIBUSB_CLASS_PRINTER &&
@ -474,16 +476,6 @@ static int probe_device(struct libusb_device *device,
config->interface[iface].altsetting[altset].bInterfaceProtocol == USB_INTERFACE_PROTOCOL_IPP) {
continue;
}
#else
// Make sure it's a printer class device that supports bidir comms (XXX Is this necessarily true?)
if (desc->bDeviceClass == LIBUSB_CLASS_PRINTER ||
(desc->bDeviceClass == LIBUSB_CLASS_PER_INTERFACE &&
config->interface[iface].altsetting[altset].bInterfaceClass == LIBUSB_CLASS_PRINTER &&
config->interface[iface].altsetting[altset].bInterfaceSubClass == USB_SUBCLASS_PRINTER &&
config->interface[iface].altsetting[altset].bInterfaceProtocol != USB_INTERFACE_PROTOCOL_BIDIR)) {
continue;
}
#endif
/* Find the first set of endpoints! */
endp_up = endp_down = 0;
@ -537,34 +529,44 @@ candidate:
dlen = parse1284_data(ieee_id, dict);
}
// if (!old_uri) goto bypass;
if (!old_uri) goto skip_manuf_model;
/* Look up mfg string. */
/* Look up mfg string in IEEE1284 data */
if (manuf_override && strlen(manuf_override)) {
manuf = url_encode(manuf_override); /* Backend supplied */
manuf = url_encode(manuf_override);
} else if ((manuf = dict_find("MANUFACTURER", dlen, dict))) {
manuf = url_encode(manuf);
} else if ((manuf = dict_find("MFG", dlen, dict))) {
manuf = url_encode(manuf);
} else if ((manuf = dict_find("MFR", dlen, dict))) {
manuf = url_encode(manuf);
} else if (desc->iManufacturer) { /* Get from USB descriptor */
}
/* If no manufacturer string, fall back to USB iManufacturer */
if ((!manuf || !strlen(manuf)) &&
desc->iManufacturer) {
buf[0] = 0;
libusb_get_string_descriptor_ascii(dev, desc->iManufacturer, (unsigned char*)buf, STR_LEN_MAX);
sanitize_string(buf);
manuf = url_encode(buf);
}
if (!manuf || !strlen(manuf)) { /* Last-ditch */
if (manuf) free(manuf);
WARNING("**** THIS PRINTER DOES NOT REPORT A VALID MANUFACTURER STRING!\n");
manuf = url_encode("Unknown"); // XXX use USB VID?
}
/* Look up model number */
/* Look up model string in IEEE1284 data */
if ((product = dict_find("MODEL", dlen, dict))) {
product = url_encode(product);
} else if ((product = dict_find("MDL", dlen, dict))) {
product = url_encode(product);
} else if (desc->iProduct) { /* Get from USB descriptor */
}
/* If no manufacturer string, fall back to USB iProduct */
if ((!product || !strlen(product)) &&
desc->iProduct) {
buf[0] = 0;
libusb_get_string_descriptor_ascii(dev, desc->iProduct, (unsigned char*)buf, STR_LEN_MAX);
sanitize_string(buf);
@ -573,15 +575,17 @@ candidate:
if (!product || !strlen(product)) { /* Last-ditch */
if (!product) free(product);
WARNING("**** THIS PRINTER DOES NOT REPORT A VALID MODEL STRING!\n");
product = url_encode("Unknown"); // XXX Use USB PID?
}
/* Look up description */
/* Look up decription string in IEEE1284 data */
if ((descr = dict_find("DESCRIPTION", dlen, dict))) {
descr = strdup(descr);
} else if ((descr = dict_find("DES", dlen, dict))) {
descr = strdup(descr);
}
if (!descr || !strlen(descr)) { /* Last-ditch, generate */
char *product2 = url_decode(product);
char *manuf3 = url_decode(manuf);
@ -600,9 +604,9 @@ candidate:
free(manuf3);
}
//bypass:
skip_manuf_model:
/* Look up serial number */
/* Prefer IEEE1284-reported serial number */
if ((serial = dict_find("SERIALNUMBER", dlen, dict))) {
serial = url_encode(serial);
} else if ((serial = dict_find("SN", dlen, dict))) {
@ -611,12 +615,23 @@ candidate:
serial = url_encode(serial);
} else if ((serial = dict_find("SERN", dlen, dict))) {
serial = url_encode(serial);
} else if (!(backend->flags & BACKEND_FLAG_BADISERIAL) &&
desc->iSerialNumber) { /* Get from USB descriptor, if we can trust it.. */
}
/* If it's not valid, fall back to USB iSerial */
if ((!serial || !strlen(serial)) &&
!(backend->flags & BACKEND_FLAG_BADISERIAL) &&
desc->iSerialNumber) {
libusb_get_string_descriptor_ascii(dev, desc->iSerialNumber, (unsigned char*)buf, STR_LEN_MAX);
sanitize_string(buf);
serial = url_encode(buf);
} else if (backend->query_serno) { /* Get from backend hook */
}
/* TODO: What about situations where iSerial does not match IEEE1284?
Or if the '1284 data is bogus? */
/* If still no serial, fall back to backend hook */
if ((!serial || !strlen(serial)) &&
backend->query_serno) { /* Get from backend hook */
struct dyesub_connection c2;
c2.dev = dev;
c2.iface = iface;
@ -627,7 +642,8 @@ candidate:
serial = url_encode(buf);
}
if (!serial || !strlen(serial)) { /* Last-ditch */
/* Last-ditch serial number fallback */
if (!serial || !strlen(serial)) {
if (serial) free(serial);
WARNING("**** THIS PRINTER DOES NOT REPORT A SERIAL NUMBER!\n");
WARNING("**** If you intend to use multiple printers of this type, you\n");