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1 | | /* SPDX-License-Identifier: GPL-3.0-or-later |
2 | | * Copyright © 2016-2020 The TokTok team. |
3 | | * Copyright © 2014 Tox project. |
4 | | */ |
5 | | |
6 | | /** |
7 | | * The state module is responsible for parsing the Tox save data format and for |
8 | | * saving state in that format. |
9 | | * |
10 | | * This module provides functions for iterating over serialised data sections |
11 | | * and reading/writing numbers in the correct format (little endian). |
12 | | * |
13 | | * Note that unlike the Tox network protocol, the save data stores its values in |
14 | | * little endian, which is native to most desktop and server architectures in |
15 | | * 2018. |
16 | | */ |
17 | | #ifndef C_TOXCORE_TOXCORE_STATE_H |
18 | | #define C_TOXCORE_TOXCORE_STATE_H |
19 | | |
20 | | #include <stdint.h> |
21 | | |
22 | | #include "attributes.h" |
23 | | #include "logger.h" |
24 | | |
25 | | #ifdef __cplusplus |
26 | | extern "C" { |
27 | | #endif |
28 | | |
29 | 2.38k | #define STATE_COOKIE_GLOBAL 0x15ed1b1f |
30 | | |
31 | 11.5k | #define STATE_COOKIE_TYPE 0x01ce |
32 | | |
33 | | typedef enum State_Type { |
34 | | STATE_TYPE_NOSPAMKEYS = 1, |
35 | | STATE_TYPE_DHT = 2, |
36 | | STATE_TYPE_FRIENDS = 3, |
37 | | STATE_TYPE_NAME = 4, |
38 | | STATE_TYPE_STATUSMESSAGE = 5, |
39 | | STATE_TYPE_STATUS = 6, |
40 | | STATE_TYPE_GROUPS = 7, |
41 | | STATE_TYPE_TCP_RELAY = 10, |
42 | | STATE_TYPE_PATH_NODE = 11, |
43 | | STATE_TYPE_CONFERENCES = 20, |
44 | | STATE_TYPE_END = 255, |
45 | | } State_Type; |
46 | | |
47 | | // Returned by the state_load_cb to instruct the loader on what to do next. |
48 | | typedef enum State_Load_Status { |
49 | | // Continue loading state data sections. |
50 | | STATE_LOAD_STATUS_CONTINUE, |
51 | | // An error occurred. Stop loading sections. |
52 | | STATE_LOAD_STATUS_ERROR, |
53 | | // We're at the end of the save data, terminate loading successfully. |
54 | | STATE_LOAD_STATUS_END, |
55 | | } State_Load_Status; |
56 | | |
57 | | typedef State_Load_Status state_load_cb(void *_Nonnull outer, const uint8_t *_Nonnull data, uint32_t length, uint16_t type); |
58 | | |
59 | | /** state load/save */ |
60 | | int state_load(const Logger *_Nonnull log, state_load_cb *_Nonnull state_load_callback, void *_Nonnull outer, const uint8_t *_Nonnull data, uint32_t length, uint16_t cookie_inner); |
61 | | |
62 | | uint8_t *_Nonnull state_write_section_header(uint8_t *_Nonnull data, uint16_t cookie_type, uint32_t len, uint32_t section_type); |
63 | | |
64 | | // Utilities for state data serialisation. |
65 | | |
66 | | uint16_t lendian_to_host16(uint16_t lendian); |
67 | | uint16_t host_to_lendian16(uint16_t host); |
68 | | |
69 | | void host_to_lendian_bytes64(uint8_t *_Nonnull dest, uint64_t num); |
70 | | void lendian_bytes_to_host64(uint64_t *_Nonnull dest, const uint8_t *_Nonnull lendian); |
71 | | |
72 | | void host_to_lendian_bytes32(uint8_t *_Nonnull dest, uint32_t num); |
73 | | void lendian_bytes_to_host32(uint32_t *_Nonnull dest, const uint8_t *_Nonnull lendian); |
74 | | |
75 | | void host_to_lendian_bytes16(uint8_t *_Nonnull dest, uint16_t num); |
76 | | void lendian_bytes_to_host16(uint16_t *_Nonnull dest, const uint8_t *_Nonnull lendian); |
77 | | |
78 | | #ifdef __cplusplus |
79 | | } /* extern "C" */ |
80 | | #endif |
81 | | |
82 | | #endif /* C_TOXCORE_TOXCORE_STATE_H */ |