1 /*
2 * Copyright (C) 2024 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 "dhcpbinding_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20 #include <unistd.h>
21 #include "securec.h"
22 #include "dhcp_binding.h"
23
24 namespace OHOS {
25 namespace DHCP {
26 constexpr size_t DHCP_SLEEP_1 = 2;
27 constexpr size_t U32_AT_SIZE_ZERO = 4;
28 constexpr int CFG_DATA_MAX_BYTES = 512;
29 constexpr int ADDRESS_MAX_BYTES = 8;
30
NextPendingIntervalTest(const uint8_t * data,size_t size)31 void NextPendingIntervalTest(const uint8_t* data, size_t size)
32 {
33 if (data == nullptr || size < 1) {
34 return;
35 }
36 uint64_t pendingInterval = static_cast<uint64_t>(data[0]);
37 NextPendingInterval(pendingInterval);
38 }
39
IsExpireTest(const uint8_t * data,size_t size)40 void IsExpireTest(const uint8_t* data, size_t size)
41 {
42 if (data == nullptr || size < 1) {
43 return;
44 }
45 AddressBinding binding;
46 binding.ipAddress = static_cast<uint32_t>(data[0]);
47 binding.clientId = static_cast<uint32_t>(data[0]);
48 binding.bindingTime = static_cast<uint64_t>(data[0]);
49 binding.pendingTime = static_cast<uint64_t>(data[0]);
50 binding.expireIn = static_cast<uint64_t>(data[0]);
51 binding.leaseTime = static_cast<uint64_t>(data[0]);
52 binding.pendingInterval = static_cast<uint64_t>(data[0]);
53 IsExpire(&binding);
54 }
55
ParseAddressBindingTest(const uint8_t * data,size_t size)56 void ParseAddressBindingTest(const uint8_t* data, size_t size)
57 {
58 if (data == nullptr || size < 1) {
59 return;
60 }
61 AddressBinding binding;
62 binding.ipAddress = static_cast<uint32_t>(data[0]);
63 binding.clientId = static_cast<uint32_t>(data[0]);
64 binding.bindingTime = static_cast<uint64_t>(data[0]);
65 binding.pendingTime = static_cast<uint64_t>(data[0]);
66 binding.expireIn = static_cast<uint64_t>(data[0]);
67 binding.leaseTime = static_cast<uint64_t>(data[0]);
68 binding.pendingInterval = static_cast<uint64_t>(data[0]);
69 const char *buf = "Text";
70 ParseAddressBinding(&binding, buf);
71 }
72
WriteAddressBindingFuzzTest(const uint8_t * data,size_t size)73 void WriteAddressBindingFuzzTest(const uint8_t* data, size_t size)
74 {
75 if (data == nullptr || size < ADDRESS_MAX_BYTES) {
76 return;
77 }
78 int index = 0;
79 AddressBinding binding;
80 int ret = memset_s(&binding, sizeof(binding), 0, sizeof(binding));
81 if (ret != EOK) {
82 return;
83 }
84 binding.ipAddress = static_cast<uint32_t>(data[index++]);
85 binding.clientId = static_cast<uint32_t>(data[index++]);
86 binding.bindingTime = static_cast<uint64_t>(data[index++]);
87 binding.pendingTime = static_cast<uint64_t>(data[index++]);
88 binding.expireIn = static_cast<uint64_t>(data[index++]);
89 binding.leaseTime = static_cast<uint64_t>(data[index++]);
90 binding.pendingInterval = static_cast<uint64_t>(data[index++]);
91 char out[CFG_DATA_MAX_BYTES] = {0};
92 if (index < static_cast<int>(size)) {
93 uint32_t bindingSize = static_cast<uint32_t>(data[index]);
94 if (bindingSize > CFG_DATA_MAX_BYTES) {
95 bindingSize = CFG_DATA_MAX_BYTES;
96 }
97 if (bindingSize < 1) {
98 bindingSize = CFG_DATA_MAX_BYTES;
99 }
100 WriteAddressBinding(&binding, out, bindingSize);
101 }
102 }
103 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)104 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
105 {
106 if ((data == nullptr) || (size <= OHOS::DHCP::U32_AT_SIZE_ZERO)) {
107 return 0;
108 }
109 sleep(DHCP_SLEEP_1);
110 OHOS::DHCP::NextPendingIntervalTest(data, size);
111 OHOS::DHCP::IsExpireTest(data, size);
112 OHOS::DHCP::ParseAddressBindingTest(data, size);
113 OHOS::DHCP::WriteAddressBindingFuzzTest(data, size);
114 return 0;
115 }
116 } // namespace DHCP
117 } // namespace OHOS
118