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1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 #ifndef MISC_INFO_H
16 #define MISC_INFO_H
17 
18 #include <iostream>
19 #include <cstdlib>
20 #include <cstdio>
21 #include <unistd.h>
22 
23 namespace Updater {
24 constexpr int MAX_COMMAND_SIZE = 32;
25 constexpr int MAX_STATUS_SIZE = 32;
26 constexpr int MAX_UPDATE_SIZE = 768;
27 constexpr int MAX_STAGE_SIZE = 32;
28 constexpr int MAX_KEYINFO_SIZE = 32;
29 constexpr int MAX_RESERVED_SIZE = 224;
30 
31 // misc partition offset definition. max size of misc is 2MB, do not overflow.
32 constexpr off_t MISC_BASE_OFFSET = 0;
33 
34 constexpr off_t MISC_UPDATE_MESSAGE_OFFSET = MISC_BASE_OFFSET;
35 constexpr off_t MISC_UPDATE_MESSAGE_SIZE = MAX_COMMAND_SIZE + MAX_STATUS_SIZE + MAX_UPDATE_SIZE +
36     MAX_STAGE_SIZE + MAX_KEYINFO_SIZE + MAX_RESERVED_SIZE;
37 
38 constexpr off_t MISC_PARTITION_RECORD_OFFSET = MISC_UPDATE_MESSAGE_OFFSET + MISC_UPDATE_MESSAGE_SIZE;
39 constexpr off_t MISC_PARTITION_RECORD_SIZE = 1024;
40 
41 constexpr off_t MISC_RECORD_UPDATE_PARTITIONS_OFFSET = MISC_PARTITION_RECORD_OFFSET + MISC_PARTITION_RECORD_SIZE;
42 constexpr off_t MISC_RECORD_UPDATE_PARTITIONS_SIZE = 256;
43 
44 struct UpdateMessage {
45     char command[MAX_COMMAND_SIZE];
46     char status[MAX_STATUS_SIZE];
47     char update[MAX_UPDATE_SIZE];
48     char stage[MAX_STAGE_SIZE];
49     char keyinfo[MAX_KEYINFO_SIZE];
50     char reserved[MAX_RESERVED_SIZE];
51 };
52 
53 bool WriteUpdaterMessage(const std::string &path, const UpdateMessage &boot);
54 bool ReadUpdaterMessage(const std::string &path, UpdateMessage &boot);
55 bool WriteUpdaterMiscMsg(const UpdateMessage &boot);
56 bool ReadUpdaterMiscMsg(UpdateMessage &boot);
57 } // Updater
58 #endif /* MISC_INFO_H */
59