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85392343fa
This tries to make our fingerprinting code work better, by avoiding using the "deviceid" field that has always been unreliable because we've calculated it multiple different ways, and even for the same version of subsurface, it ends up changing in the middle (ie we calculate one value initially, then re-calculate it when we have a proper serial number string). So instead, the fingerprinting code will look up and save the fingerprint file using purely "stable" information that is available early during the download: - the device model name (which is a string with vendor and product name separated by a space) - the DC_EVENT_DEVINFO 32-bit 'serial' number (which is not necessarily a real serial number at all, but hopefully at least a unique number for the particular product) but because the model name is not necessarily a good filename (think slashes and other possibly invalid characters), we hash that model name and use the resulting hex number in the fingerprint file name. This way the fingerprint file is unambiguous at load and save time, and depends purely on libdivecomputer data. But because we also need to verify that we have the actual _dive_ associated with that fingerprint, we also need to save the final deviceid and diveid when saving the fingerprint file, so that when we load it again we can look up the dive and verify that we have it before we use the fingerprint data. To do that, the fingerprint file itself contains not just the fingerprint data from libdivecomputer, but the last 8 bytes of the file are the (subsurface) deviceid and the diveid of the dive that is associated with the fingerprint. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef LIBDIVECOMPUTER_H
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#define LIBDIVECOMPUTER_H
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#include <stdint.h>
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#include <stdio.h>
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/* libdivecomputer */
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#ifdef DC_VERSION /* prevent a warning with wingdi.h */
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#undef DC_VERSION
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#endif
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#include <libdivecomputer/version.h>
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#include <libdivecomputer/device.h>
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#include <libdivecomputer/parser.h>
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// Even if we have an old libdivecomputer, Uemis uses this
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#ifndef DC_TRANSPORT_USBSTORAGE
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#define DC_TRANSPORT_USBSTORAGE (1 << 6)
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#define dc_usb_storage_open(stream, context, devname) (DC_STATUS_UNSUPPORTED)
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#endif
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#ifdef __cplusplus
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extern "C" {
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#else
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#include <stdbool.h>
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#endif
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struct dive;
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struct dive_computer;
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struct devices;
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typedef struct {
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dc_descriptor_t *descriptor;
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const char *vendor, *product, *devname;
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const char *model, *btname;
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unsigned char *fingerprint;
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unsigned int fsize, fdeviceid, fdiveid;
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struct dc_event_devinfo_t devinfo;
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uint32_t diveid;
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dc_device_t *device;
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dc_context_t *context;
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dc_iostream_t *iostream;
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bool force_download;
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bool libdc_log;
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bool libdc_dump;
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bool bluetooth_mode;
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FILE *libdc_logfile;
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struct dive_table *download_table;
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struct dive_site_table *sites;
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struct device_table *devices;
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void *androidUsbDeviceDescriptor;
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} device_data_t;
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const char *errmsg (dc_status_t rc);
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const char *do_libdivecomputer_import(device_data_t *data);
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const char *do_uemis_import(device_data_t *data);
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dc_status_t libdc_buffer_parser(struct dive *dive, device_data_t *data, unsigned char *buffer, int size);
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void logfunc(dc_context_t *context, dc_loglevel_t loglevel, const char *file, unsigned int line, const char *function, const char *msg, void *userdata);
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dc_descriptor_t *get_descriptor(dc_family_t type, unsigned int model);
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extern int import_thread_cancelled;
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extern const char *progress_bar_text;
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extern void (*progress_callback)(const char *text);
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extern double progress_bar_fraction;
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extern char *logfile_name;
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extern char *dumpfile_name;
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dc_status_t ble_packet_open(dc_iostream_t **iostream, dc_context_t *context, const char* devaddr, void *userdata);
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dc_status_t rfcomm_stream_open(dc_iostream_t **iostream, dc_context_t *context, const char* devaddr);
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dc_status_t ftdi_open(dc_iostream_t **iostream, dc_context_t *context);
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dc_status_t serial_usb_android_open(dc_iostream_t **iostream, dc_context_t *context, void *androidUsbDevice);
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dc_status_t divecomputer_device_open(device_data_t *data);
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unsigned int get_supported_transports(device_data_t *data);
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#ifdef __cplusplus
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}
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#endif
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#endif // LIBDIVECOMPUTER_H
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