1 /*
2 * Copyright (c) 2022 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
16 #include "softbusclientmanager_fuzzer.h"
17 #include "client_bus_center_manager.h"
18 #include <cstddef>
19
20 namespace OHOS {
21 constexpr size_t THRESHOLD = 10;
22 constexpr int32_t OFFSET = 4;
23 constexpr uint32_t NINE = 9;
24 enum CmdId {
25 CMD_SOFTBUS_ONE,
26 CMD_SOFTBUS_TWO,
27 CMD_SOFTBUS_THREE,
28 CMD_SOFTBUS_FOUR,
29 CMD_SOFTBUS_FIVE,
30 };
31
Convert2Uint32(const uint8_t * ptr)32 uint32_t Convert2Uint32(const uint8_t *ptr)
33 {
34 if (ptr == nullptr) {
35 return 0;
36 }
37 /*
38 * Move the 0th digit 24 to the left, the first digit 16 to the left, the second digit 8 to the left,
39 * and the third digit no left
40 */
41 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
42 }
43
SoftbusClientMagSwitch(uint32_t cmd,const uint8_t * rawData)44 static void SoftbusClientMagSwitch(uint32_t cmd, const uint8_t *rawData)
45 {
46 void *info = const_cast<void *>(reinterpret_cast<const void *>(rawData));
47 int32_t type = *const_cast<int32_t *>(reinterpret_cast<const int32_t *>(rawData));
48 cmd = cmd % NINE;
49 switch (cmd) {
50 case CMD_SOFTBUS_ONE: {
51 bool isOnline = true;
52 LnnOnNodeOnlineStateChanged("", isOnline, info);
53 break;
54 }
55 case CMD_SOFTBUS_TWO: {
56 LnnOnNodeBasicInfoChanged("", info, type);
57 break;
58 }
59 case CMD_SOFTBUS_THREE: {
60 LnnOnJoinResult(info, reinterpret_cast<const char *>(rawData), type);
61 break;
62 }
63 case CMD_SOFTBUS_FOUR: {
64 LnnOnLeaveResult(reinterpret_cast<const char *>(rawData), type);
65 break;
66 }
67 case CMD_SOFTBUS_FIVE: {
68 LnnOnTimeSyncResult(reinterpret_cast<const void *>(info), type);
69 break;
70 }
71 default:
72 break;
73 }
74 }
75
DoSomethingInterestingWithMyAPI(const uint8_t * rawData,size_t size)76 bool DoSomethingInterestingWithMyAPI(const uint8_t *rawData, size_t size)
77 {
78 (void)size;
79
80 if (rawData == nullptr) {
81 return false;
82 }
83 uint32_t cmd = Convert2Uint32(rawData);
84 rawData = rawData + OFFSET;
85
86 SoftbusClientMagSwitch(cmd, rawData);
87
88 return true;
89 }
90 }
91
92 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)93 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
94 {
95 if (size < OHOS::THRESHOLD) {
96 return 0;
97 }
98
99 /* Run your code on data */
100 OHOS::DoSomethingInterestingWithMyAPI(data, size);
101 return 0;
102 }