diff options
Diffstat (limited to 'circuitpython/supervisor/shared/bluetooth/file_transfer.c')
| -rw-r--r-- | circuitpython/supervisor/shared/bluetooth/file_transfer.c | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/circuitpython/supervisor/shared/bluetooth/file_transfer.c b/circuitpython/supervisor/shared/bluetooth/file_transfer.c new file mode 100644 index 0000000..a6a2f80 --- /dev/null +++ b/circuitpython/supervisor/shared/bluetooth/file_transfer.c @@ -0,0 +1,756 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2019-2021 Scott Shawcroft for Adafruit Industries + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include <string.h> + +#include "extmod/vfs.h" +#include "extmod/vfs_fat.h" +#include "shared/timeutils/timeutils.h" + +#include "shared-bindings/_bleio/__init__.h" +#include "shared-bindings/_bleio/Adapter.h" +#include "shared-bindings/_bleio/Characteristic.h" +#include "shared-bindings/_bleio/PacketBuffer.h" +#include "shared-bindings/_bleio/Service.h" +#include "shared-bindings/_bleio/UUID.h" +#include "shared-module/storage/__init__.h" + +#include "bluetooth/ble_drv.h" + +#include "common-hal/_bleio/__init__.h" + +#include "supervisor/fatfs_port.h" +#include "supervisor/shared/reload.h" +#include "supervisor/shared/bluetooth/file_transfer.h" +#include "supervisor/shared/bluetooth/file_transfer_protocol.h" +#include "supervisor/shared/tick.h" +#include "supervisor/usb.h" + +#include "py/mpstate.h" +#include "py/stackctrl.h" + +STATIC bleio_service_obj_t supervisor_ble_service; +STATIC bleio_uuid_obj_t supervisor_ble_service_uuid; +STATIC bleio_characteristic_obj_t supervisor_ble_version_characteristic; +STATIC bleio_uuid_obj_t supervisor_ble_version_uuid; +STATIC bleio_characteristic_obj_t supervisor_ble_transfer_characteristic; +STATIC bleio_uuid_obj_t supervisor_ble_transfer_uuid; + +// This is the base UUID for the file transfer service. +const uint8_t file_transfer_base_uuid[16] = {0x72, 0x65, 0x66, 0x73, 0x6e, 0x61, 0x72, 0x54, 0x65, 0x6c, 0x69, 0x46, 0x00, 0x00, 0xaf, 0xad }; + +STATIC mp_obj_list_t characteristic_list; +STATIC mp_obj_t characteristic_list_items[2]; +// 2 * 10 ringbuf packets, 512 for a disk sector and 12 for the file transfer write header. +#define PACKET_BUFFER_SIZE (2 * 10 + 512 + 12) +// uint32_t so its aligned +STATIC uint32_t _buffer[PACKET_BUFFER_SIZE / 4 + 1]; +STATIC uint32_t _outgoing1[BLE_GATTS_VAR_ATTR_LEN_MAX / 4]; +STATIC uint32_t _outgoing2[BLE_GATTS_VAR_ATTR_LEN_MAX / 4]; +STATIC ble_drv_evt_handler_entry_t static_handler_entry; +STATIC bleio_packet_buffer_obj_t _transfer_packet_buffer; + +void supervisor_start_bluetooth_file_transfer(void) { + supervisor_ble_service_uuid.base.type = &bleio_uuid_type; + common_hal_bleio_uuid_construct(&supervisor_ble_service_uuid, 0xfebb, NULL); + + // We know we'll only be 1 characteristic so we can statically allocate it. + characteristic_list.base.type = &mp_type_list; + characteristic_list.alloc = sizeof(characteristic_list_items) / sizeof(characteristic_list_items[0]); + characteristic_list.len = 0; + characteristic_list.items = characteristic_list_items; + mp_seq_clear(characteristic_list.items, 0, characteristic_list.alloc, sizeof(*characteristic_list.items)); + + _common_hal_bleio_service_construct(&supervisor_ble_service, &supervisor_ble_service_uuid, false /* is secondary */, &characteristic_list); + + // Version number + supervisor_ble_version_uuid.base.type = &bleio_uuid_type; + common_hal_bleio_uuid_construct(&supervisor_ble_version_uuid, 0x0100, file_transfer_base_uuid); + common_hal_bleio_characteristic_construct(&supervisor_ble_version_characteristic, + &supervisor_ble_service, + 0, // handle (for remote only) + &supervisor_ble_version_uuid, + CHAR_PROP_READ, + SECURITY_MODE_OPEN, + SECURITY_MODE_NO_ACCESS, + 4, // max length + true, // fixed length + NULL, // no initial value + NULL); // no description + + uint32_t version = 4; + mp_buffer_info_t bufinfo; + bufinfo.buf = &version; + bufinfo.len = sizeof(version); + common_hal_bleio_characteristic_set_value(&supervisor_ble_version_characteristic, &bufinfo); + + // Active filename. + supervisor_ble_transfer_uuid.base.type = &bleio_uuid_type; + common_hal_bleio_uuid_construct(&supervisor_ble_transfer_uuid, 0x0200, file_transfer_base_uuid); + common_hal_bleio_characteristic_construct(&supervisor_ble_transfer_characteristic, + &supervisor_ble_service, + 0, // handle (for remote only) + &supervisor_ble_transfer_uuid, + CHAR_PROP_READ | CHAR_PROP_WRITE_NO_RESPONSE | CHAR_PROP_NOTIFY, + SECURITY_MODE_ENC_NO_MITM, + SECURITY_MODE_ENC_NO_MITM, + BLE_GATTS_VAR_ATTR_LEN_MAX, // max length + false, // fixed length + NULL, // no initial valuen + NULL); + + _common_hal_bleio_packet_buffer_construct( + &_transfer_packet_buffer, &supervisor_ble_transfer_characteristic, + _buffer, PACKET_BUFFER_SIZE, + _outgoing1, _outgoing2, BLE_GATTS_VAR_ATTR_LEN_MAX, + &static_handler_entry); +} + +#define COMMAND_SIZE 1024 + +#define ANY_COMMAND 0x00 +#define THIS_COMMAND 0x01 + +// FATFS has a two second timestamp resolution but the BLE API allows for nanosecond resolution. +// This function truncates the time the time to a resolution storable by FATFS and fills in the +// FATFS encoded version into fattime. +STATIC uint64_t truncate_time(uint64_t input_time, DWORD *fattime) { + timeutils_struct_time_t tm; + uint64_t seconds_since_epoch = timeutils_seconds_since_epoch_from_nanoseconds_since_1970(input_time); + timeutils_seconds_since_epoch_to_struct_time(seconds_since_epoch, &tm); + uint64_t truncated_time = timeutils_nanoseconds_since_epoch_to_nanoseconds_since_1970((seconds_since_epoch / 2) * 2 * 1000000000); + + *fattime = ((tm.tm_year - 1980) << 25) | (tm.tm_mon << 21) | (tm.tm_mday << 16) | + (tm.tm_hour << 11) | (tm.tm_min << 5) | (tm.tm_sec >> 1); + return truncated_time; +} + +// Used by read and write. +STATIC FIL active_file; +STATIC uint8_t _process_read(const uint8_t *raw_buf, size_t command_len) { + struct read_command *command = (struct read_command *)raw_buf; + size_t header_size = sizeof(struct read_command); + size_t response_size = sizeof(struct read_data); + uint8_t data_buffer[response_size]; + struct read_data response; + response.command = READ_DATA; + response.status = STATUS_OK; + if (command->path_length > (COMMAND_SIZE - response_size - 1)) { // -1 for the null we'll write + // TODO: throw away any more packets of path. + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, response_size, NULL, 0); + return ANY_COMMAND; + } + // We need to receive another packet to have the full path. + if (command_len < header_size + command->path_length) { + return THIS_COMMAND; + } + + char *path = (char *)((uint8_t *)command) + header_size; + path[command->path_length] = '\0'; + + FATFS *fs = &((fs_user_mount_t *)MP_STATE_VM(vfs_mount_table)->obj)->fatfs; + FRESULT result = f_open(fs, &active_file, path, FA_READ); + if (result != FR_OK) { + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, response_size, NULL, 0); + return ANY_COMMAND; + } + uint32_t total_length = f_size(&active_file); + // Write out the response header. + uint32_t offset = command->chunk_offset; + uint32_t chunk_size = command->chunk_size; + chunk_size = MIN(chunk_size, total_length - offset); + response.chunk_offset = offset; + response.total_length = total_length; + response.data_size = chunk_size; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, response_size, NULL, 0); + f_lseek(&active_file, offset); + // Write out the chunk contents. We can do this in small pieces because PacketBuffer + // will assemble them into larger packets of its own. + size_t chunk_end = offset + chunk_size; + while (offset < chunk_end) { + size_t quantity_read; + size_t read_amount = MIN(response_size, chunk_end - offset); + f_read(&active_file, data_buffer, read_amount, &quantity_read); + offset += quantity_read; + // TODO: Do something if the read fails + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, data_buffer, quantity_read, NULL, 0); + } + if (offset >= total_length) { + f_close(&active_file); + return ANY_COMMAND; + } + return READ_PACING; +} + +STATIC uint8_t _process_read_pacing(const uint8_t *raw_buf, size_t command_len) { + struct read_pacing *command = (struct read_pacing *)raw_buf; + struct read_data response; + response.command = READ_DATA; + response.status = STATUS_OK; + size_t response_size = sizeof(struct read_data); + + uint32_t total_length = f_size(&active_file); + // Write out the response header. + uint32_t chunk_size = MIN(command->chunk_size, total_length - command->chunk_offset); + response.chunk_offset = command->chunk_offset; + response.total_length = total_length; + response.data_size = chunk_size; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, response_size, NULL, 0); + f_lseek(&active_file, command->chunk_offset); + // Write out the chunk contents. We can do this in small pieces because PacketBuffer + // will assemble them into larger packets of its own. + size_t chunk_offset = 0; + uint8_t data[20]; + while (chunk_offset < chunk_size) { + size_t quantity_read; + size_t read_size = MIN(chunk_size - chunk_offset, sizeof(data)); + FRESULT result = f_read(&active_file, &data, read_size, &quantity_read); + if (quantity_read == 0 || result != FR_OK) { + // TODO: If we can't read everything, then the file must have been shortened. Maybe we + // should return 0s to pad it out. + break; + } + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&data, quantity_read, NULL, 0); + chunk_offset += quantity_read; + } + if ((chunk_offset + chunk_size) >= total_length) { + f_close(&active_file); + return ANY_COMMAND; + } + return READ_PACING; +} + +// Used by write and write data to know when the write is complete. +STATIC size_t total_write_length; +STATIC uint64_t _truncated_time; + +// Returns true if usb is active and replies with an error if so. If not, it grabs +// the USB mass storage lock and returns false. Make sure to release the lock with +// usb_msc_unlock() when the transaction is complete. +STATIC bool _usb_active(void *response, size_t response_size) { + // Check to see if USB has already been mounted. If not, then we "eject" from USB until we're done. + #if CIRCUITPY_USB && CIRCUITPY_USB_MSC + if (storage_usb_enabled() && !usb_msc_lock()) { + // Status is always the second byte of the response. + ((uint8_t *)response)[1] = STATUS_ERROR_READONLY; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)response, response_size, NULL, 0); + return true; + } + #endif + return false; +} + +STATIC uint8_t _process_write(const uint8_t *raw_buf, size_t command_len) { + struct write_command *command = (struct write_command *)raw_buf; + size_t header_size = sizeof(struct write_command); + struct write_pacing response; + response.command = WRITE_PACING; + response.status = STATUS_OK; + if (command->path_length > (COMMAND_SIZE - header_size - 1)) { // -1 for the null we'll write + // TODO: throw away any more packets of path. + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct write_pacing), NULL, 0); + return ANY_COMMAND; + } + // We need to receive another packet to have the full path. + if (command_len < header_size + command->path_length) { + return THIS_COMMAND; + } + total_write_length = command->total_length; + + char *path = (char *)command->path; + path[command->path_length] = '\0'; + if (_usb_active(&response, sizeof(struct write_pacing))) { + return ANY_COMMAND; + } + + FATFS *fs = &((fs_user_mount_t *)MP_STATE_VM(vfs_mount_table)->obj)->fatfs; + DWORD fattime; + _truncated_time = truncate_time(command->modification_time, &fattime); + override_fattime(fattime); + FRESULT result = f_open(fs, &active_file, path, FA_WRITE | FA_OPEN_ALWAYS); + if (result != FR_OK) { + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct write_pacing), NULL, 0); + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + override_fattime(0); + return ANY_COMMAND; + } + // Write out the pacing response. + + // Align the next chunk to a sector boundary. + uint32_t offset = command->offset; + size_t chunk_size = MIN(total_write_length - offset, 512 - (offset % 512)); + // Special case when truncating the file. (Deleting stuff off the end.) + if (chunk_size == 0) { + f_lseek(&active_file, offset); + f_truncate(&active_file); + f_close(&active_file); + override_fattime(0); + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + } + response.offset = offset; + response.free_space = chunk_size; + response.truncated_time = _truncated_time; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct write_pacing), NULL, 0); + if (chunk_size == 0) { + // Don't reload until everything is written out of the packet buffer. + common_hal_bleio_packet_buffer_flush(&_transfer_packet_buffer); + return ANY_COMMAND; + } + + return WRITE_DATA; +} + +STATIC uint8_t _process_write_data(const uint8_t *raw_buf, size_t command_len) { + struct write_data *command = (struct write_data *)raw_buf; + size_t header_size = sizeof(struct write_data); + struct write_pacing response; + response.command = WRITE_PACING; + response.status = STATUS_OK; + if (command->data_size > (COMMAND_SIZE - header_size - 1)) { // -1 for the null we'll write + // TODO: throw away any more packets of path. + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct write_pacing), NULL, 0); + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + override_fattime(0); + return ANY_COMMAND; + } + // We need to receive another packet to have the full path. + if (command_len < header_size + command->data_size) { + return THIS_COMMAND; + } + uint32_t offset = command->offset; + f_lseek(&active_file, offset); + UINT actual; + f_write(&active_file, command->data, command->data_size, &actual); + if (actual < command->data_size) { // -1 for the null we'll write + // TODO: throw away any more packets of path. + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct write_pacing), NULL, 0); + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + override_fattime(0); + return ANY_COMMAND; + } + offset += command->data_size; + // Align the next chunk to a sector boundary. + size_t chunk_size = MIN(total_write_length - offset, 512); + response.offset = offset; + response.free_space = chunk_size; + response.truncated_time = _truncated_time; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct write_pacing), NULL, 0); + if (total_write_length == offset) { + f_truncate(&active_file); + f_close(&active_file); + override_fattime(0); + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + // Don't reload until everything is written out of the packet buffer. + common_hal_bleio_packet_buffer_flush(&_transfer_packet_buffer); + return ANY_COMMAND; + } + return WRITE_DATA; +} + +STATIC FRESULT _delete_directory_contents(FATFS *fs, const TCHAR *path) { + FF_DIR dir; + FRESULT res = f_opendir(fs, &dir, path); + FILINFO file_info; + // Check the stack since we're putting paths on it. + if (mp_stack_usage() >= MP_STATE_THREAD(stack_limit)) { + return FR_INT_ERR; + } + while (res == FR_OK) { + res = f_readdir(&dir, &file_info); + if (res != FR_OK || file_info.fname[0] == '\0') { + break; + } + size_t pathlen = strlen(path); + size_t fnlen = strlen(file_info.fname); + TCHAR full_path[pathlen + 1 + fnlen]; + memcpy(full_path, path, pathlen); + full_path[pathlen] = '/'; + size_t full_pathlen = pathlen + 1 + fnlen; + memcpy(full_path + pathlen + 1, file_info.fname, fnlen); + full_path[full_pathlen] = '\0'; + if ((file_info.fattrib & AM_DIR) != 0) { + res = _delete_directory_contents(fs, full_path); + } + if (res != FR_OK) { + break; + } + res = f_unlink(fs, full_path); + } + f_closedir(&dir); + return res; +} + +STATIC uint8_t _process_delete(const uint8_t *raw_buf, size_t command_len) { + const struct delete_command *command = (struct delete_command *)raw_buf; + size_t header_size = sizeof(struct delete_command); + struct delete_status response; + response.command = DELETE_STATUS; + response.status = STATUS_OK; + if (command->path_length > (COMMAND_SIZE - header_size - 1)) { // -1 for the null we'll write + // TODO: throw away any more packets of path. + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct delete_status), NULL, 0); + return ANY_COMMAND; + } + if (_usb_active(&response, sizeof(struct delete_status))) { + return ANY_COMMAND; + } + // We need to receive another packet to have the full path. + if (command_len < header_size + command->path_length) { + return THIS_COMMAND; + } + FATFS *fs = &((fs_user_mount_t *)MP_STATE_VM(vfs_mount_table)->obj)->fatfs; + char *path = (char *)((uint8_t *)command) + header_size; + path[command->path_length] = '\0'; + FILINFO file; + FRESULT result = f_stat(fs, path, &file); + if (result == FR_OK) { + if ((file.fattrib & AM_DIR) != 0) { + result = _delete_directory_contents(fs, path); + } + if (result == FR_OK) { + result = f_unlink(fs, path); + } + } + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + if (result != FR_OK) { + response.status = STATUS_ERROR; + } + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct delete_status), NULL, 0); + if (result == FR_OK) { + // Don't reload until everything is written out of the packet buffer. + common_hal_bleio_packet_buffer_flush(&_transfer_packet_buffer); + } + return ANY_COMMAND; +} + +// NULL-terminate the path and remove any trailing /. Older versions of the +// protocol require it but newer ones do not. +STATIC void _terminate_path(char *path, size_t path_length) { + // -1 because fatfs doesn't want a trailing / + if (path[path_length - 1] == '/') { + path[path_length - 1] = '\0'; + } else { + path[path_length] = '\0'; + } +} + +STATIC uint8_t _process_mkdir(const uint8_t *raw_buf, size_t command_len) { + const struct mkdir_command *command = (struct mkdir_command *)raw_buf; + size_t header_size = sizeof(struct mkdir_command); + struct mkdir_status response; + response.command = MKDIR_STATUS; + response.status = STATUS_OK; + if (command->path_length > (COMMAND_SIZE - header_size - 1)) { // -1 for the null we'll write + // TODO: throw away any more packets of path. + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct mkdir_status), NULL, 0); + return ANY_COMMAND; + } + if (_usb_active(&response, sizeof(struct mkdir_status))) { + return ANY_COMMAND; + } + // We need to receive another packet to have the full path. + if (command_len < header_size + command->path_length) { + return THIS_COMMAND; + } + FATFS *fs = &((fs_user_mount_t *)MP_STATE_VM(vfs_mount_table)->obj)->fatfs; + char *path = (char *)command->path; + _terminate_path(path, command->path_length); + + DWORD fattime; + response.truncated_time = truncate_time(command->modification_time, &fattime); + override_fattime(fattime); + FRESULT result = f_mkdir(fs, path); + override_fattime(0); + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + if (result != FR_OK) { + response.status = STATUS_ERROR; + } + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct mkdir_status), NULL, 0); + if (result == FR_OK) { + // Don't reload until everything is written out of the packet buffer. + common_hal_bleio_packet_buffer_flush(&_transfer_packet_buffer); + } + return ANY_COMMAND; +} + +STATIC void send_listdir_entry_header(const struct listdir_entry *entry, mp_int_t max_packet_size) { + mp_int_t response_size = sizeof(struct listdir_entry); + if (max_packet_size >= response_size) { + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)entry, response_size, NULL, 0); + return; + } + // Split into 16 + 12 size packets to fit into 20 byte minimum packet size. + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)entry, 16, NULL, 0); + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, ((const uint8_t *)entry) + 16, response_size - 16, NULL, 0); +} + +STATIC uint8_t _process_listdir(uint8_t *raw_buf, size_t command_len) { + const struct listdir_command *command = (struct listdir_command *)raw_buf; + struct listdir_entry *entry = (struct listdir_entry *)raw_buf; + size_t header_size = sizeof(struct listdir_command); + mp_int_t max_packet_size = common_hal_bleio_packet_buffer_get_outgoing_packet_length(&_transfer_packet_buffer); + if (max_packet_size < 0) { + // -1 means we're disconnected + return ANY_COMMAND; + } + // We reuse the command buffer so that we can produce long packets without + // making the stack large. + if (command->path_length > (COMMAND_SIZE - header_size - 1)) { // -1 for the null we'll write + // TODO: throw away any more packets of path. + entry->command = LISTDIR_ENTRY; + entry->status = STATUS_ERROR; + send_listdir_entry_header(entry, max_packet_size); + return ANY_COMMAND; + } + // We need to receive another packet to have the full path. + if (command_len < header_size + command->path_length) { + return THIS_COMMAND; + } + + FATFS *fs = &((fs_user_mount_t *)MP_STATE_VM(vfs_mount_table)->obj)->fatfs; + char *path = (char *)&command->path; + _terminate_path(path, command->path_length); + // mp_printf(&mp_plat_print, "list %s\n", path); + FF_DIR dir; + FRESULT res = f_opendir(fs, &dir, path); + + entry->command = LISTDIR_ENTRY; + entry->status = STATUS_OK; + entry->path_length = 0; + entry->entry_number = 0; + entry->entry_count = 0; + entry->flags = 0; + + if (res != FR_OK) { + entry->status = STATUS_ERROR_NO_FILE; + send_listdir_entry_header(entry, max_packet_size); + return ANY_COMMAND; + } + FILINFO file_info; + res = f_readdir(&dir, &file_info); + char *fn = file_info.fname; + size_t total_entries = 0; + while (res == FR_OK && fn[0] != 0) { + res = f_readdir(&dir, &file_info); + total_entries += 1; + } + // Rewind the directory. + f_readdir(&dir, NULL); + entry->entry_count = total_entries; + for (size_t i = 0; i < total_entries; i++) { + res = f_readdir(&dir, &file_info); + entry->entry_number = i; + uint64_t truncated_time = timeutils_mktime(1980 + (file_info.fdate >> 9), + (file_info.fdate >> 5) & 0xf, + file_info.fdate & 0x1f, + file_info.ftime >> 11, + (file_info.ftime >> 5) & 0x1f, + (file_info.ftime & 0x1f) * 2) * 1000000000ULL; + entry->truncated_time = truncated_time; + if ((file_info.fattrib & AM_DIR) != 0) { + entry->flags = 1; // Directory + entry->file_size = 0; + } else { + entry->flags = 0; + entry->file_size = file_info.fsize; + } + + size_t name_length = strlen(file_info.fname); + entry->path_length = name_length; + send_listdir_entry_header(entry, max_packet_size); + size_t fn_offset = 0; + while (fn_offset < name_length) { + size_t fn_size = MIN(name_length - fn_offset, 4); + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, ((uint8_t *)file_info.fname) + fn_offset, fn_size, NULL, 0); + fn_offset += fn_size; + } + } + f_closedir(&dir); + entry->path_length = 0; + entry->entry_number = entry->entry_count; + entry->flags = 0; + entry->file_size = 0; + send_listdir_entry_header(entry, max_packet_size); + return ANY_COMMAND; +} + +STATIC uint8_t _process_move(const uint8_t *raw_buf, size_t command_len) { + const struct move_command *command = (struct move_command *)raw_buf; + size_t header_size = sizeof(struct move_command); + struct move_status response; + response.command = MOVE_STATUS; + response.status = STATUS_OK; + // +2 for null terminators. + uint32_t total_path_length = command->old_path_length + command->new_path_length + 1; + if (total_path_length > (COMMAND_SIZE - header_size - 1)) { + // TODO: throw away any more packets of path. + response.status = STATUS_ERROR; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct move_status), NULL, 0); + return ANY_COMMAND; + } + if (_usb_active(&response, sizeof(struct move_status))) { + return ANY_COMMAND; + } + // We need to receive another packet to have the full path. + if (command_len < header_size + total_path_length) { + return THIS_COMMAND; + } + FATFS *fs = &((fs_user_mount_t *)MP_STATE_VM(vfs_mount_table)->obj)->fatfs; + char *old_path = (char *)command->paths; + old_path[command->old_path_length] = '\0'; + + char *new_path = old_path + command->old_path_length + 1; + new_path[command->new_path_length] = '\0'; + + // mp_printf(&mp_plat_print, "move %s to %s\n", old_path, new_path); + + FRESULT result = f_rename(fs, old_path, new_path); + #if CIRCUITPY_USB_MSC + usb_msc_unlock(); + #endif + if (result != FR_OK) { + response.status = STATUS_ERROR; + } + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, (const uint8_t *)&response, sizeof(struct move_status), NULL, 0); + if (result == FR_OK) { + // Don't reload until everything is written out of the packet buffer. + common_hal_bleio_packet_buffer_flush(&_transfer_packet_buffer); + } + return ANY_COMMAND; +} + +// Background state that must live across background calls. After the _process +// helpers to force them to not use them. +STATIC uint8_t current_command[COMMAND_SIZE] __attribute__ ((aligned(4))); +STATIC volatile size_t current_offset; +STATIC uint8_t next_command; +STATIC bool running = false; +void supervisor_bluetooth_file_transfer_background(void) { + if (running) { + return; + } + running = true; + mp_int_t size = 1; + while (size > 0) { + size = common_hal_bleio_packet_buffer_readinto(&_transfer_packet_buffer, current_command + current_offset, COMMAND_SIZE - current_offset); + + if (size == 0) { + break; + } + autoreload_suspend(AUTORELOAD_SUSPEND_BLE); + // TODO: If size < 0 return an error. + current_offset += size; + #if CIRCUITPY_VERBOSE_BLE + mp_printf(&mp_plat_print, "buffer[:%d]:", current_offset); + for (size_t i = 0; i < current_offset; i++) { + mp_printf(&mp_plat_print, " (%x %c)", current_command[i], current_command[i]); + } + mp_printf(&mp_plat_print, "\n"); + #endif + uint8_t current_state = current_command[0]; + // mp_printf(&mp_plat_print, "current command 0x%02x\n", current_state); + // Check for protocol error. + if (next_command != ANY_COMMAND && next_command != THIS_COMMAND && ((current_state & 0xf) != 0) && current_state != next_command) { + uint8_t response[2]; + response[0] = next_command; + response[1] = STATUS_ERROR_PROTOCOL; + common_hal_bleio_packet_buffer_write(&_transfer_packet_buffer, response, 2, NULL, 0); + autoreload_resume(AUTORELOAD_SUSPEND_BLE); + break; + } + switch (current_state) { + case READ: + next_command = _process_read(current_command, current_offset); + break; + case READ_PACING: + next_command = _process_read_pacing(current_command, current_offset); + break; + case WRITE: + next_command = _process_write(current_command, current_offset); + break; + case WRITE_DATA: + next_command = _process_write_data(current_command, current_offset); + break; + case DELETE: + next_command = _process_delete(current_command, current_offset); + break; + case MKDIR: + next_command = _process_mkdir(current_command, current_offset); + break; + case LISTDIR: + next_command = _process_listdir(current_command, current_offset); + break; + case MOVE: + next_command = _process_move(current_command, current_offset); + break; + } + // Preserve the offset if we are waiting for more from this command. + if (next_command != THIS_COMMAND) { + current_offset = 0; + } + if (next_command == ANY_COMMAND) { + autoreload_resume(AUTORELOAD_SUSPEND_BLE); + // Trigger a reload if the command may have mutated the file system. + if (current_state == WRITE || + current_state == WRITE_DATA || + current_state == DELETE || + current_state == MKDIR || + current_state == MOVE) { + autoreload_trigger(); + } + } + } + running = false; +} + +void supervisor_bluetooth_file_transfer_disconnected(void) { + next_command = ANY_COMMAND; + current_offset = 0; + f_close(&active_file); + autoreload_resume(AUTORELOAD_SUSPEND_BLE); +} |