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 "dhcpaddresspool_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20#include <unistd.h>
21#include "securec.h"
22#include "address_utils.h"
23#include "dhcp_address_pool.h"
24#include "dhcp_s_define.h"
25
26namespace OHOS {
27namespace Wifi {
28constexpr size_t DHCP_SLEEP_1 = 2;
29constexpr size_t U32_AT_SIZE_ZERO = 4;
30
31void DhcpAddressPoolFuzzTest(const uint8_t* data, size_t size)
32{
33    AddressBinding binding;
34    memcpy_s(binding.chaddr, PID_MAX_LEN, "*", PID_MAX_LEN);
35    binding.ipAddress = static_cast<uint32_t>(data[0]);
36    binding.clientId = static_cast<uint32_t>(data[0]);
37    binding.bindingTime = static_cast<uint64_t>(data[0]);
38    binding.pendingTime = static_cast<uint64_t>(data[0]);
39    binding.expireIn = static_cast<uint64_t>(data[0]);
40    binding.leaseTime = static_cast<uint64_t>(data[0]);
41    binding.pendingInterval = static_cast<uint64_t>(data[0]);
42    DhcpAddressPool pool;
43    strncpy_s(pool.ifname, IFACE_NAME_SIZE, "*", IFACE_NAME_SIZE - 1);
44    pool.netmask = static_cast<uint32_t>(data[0]);
45    pool.serverId = static_cast<uint32_t>(data[0]);
46    pool.gateway = static_cast<uint32_t>(data[0]);
47    pool.leaseTime = static_cast<uint32_t>(data[0]);
48    pool.renewalTime = static_cast<uint32_t>(data[0]);
49    DhcpOptionList options;
50    options.size = static_cast<uint32_t>(data[0]);
51    const char *ifname = "wlan0";
52    uint32_t ipAdd = 0;
53    memcpy_s(&ipAdd, sizeof(uint32_t), "192.168.100.1", sizeof(uint32_t));
54    int force = static_cast<int>(data[0]);
55    int mode = static_cast<int>(data[0]);
56    uint8_t macAddr[DHCP_HWADDR_LENGTH];
57    InitAddressPool(&pool, ifname, &options);
58    FreeAddressPool(&pool);
59    IsReservedIp(&pool, ipAdd);
60    AddReservedBinding(&macAddr[0]);
61    RemoveReservedBinding(&macAddr[0]);
62    RemoveBinding(&macAddr[0]);
63    AddBinding(&binding);
64    AddLease(&pool, &binding);
65    GetLease(&pool, ipAdd);
66    UpdateLease(&pool, &binding);
67    RemoveLease(&pool, &binding);
68    LoadBindingRecoders(&pool);
69    SaveBindingRecoders(&pool, force);
70    QueryBinding(macAddr, &options);
71    SetDistributeMode(mode);
72    GetDistributeMode();
73    DeleteMacInLease(&pool, &binding);
74    DeleteMacInLease(nullptr, &binding);
75    DeleteMacInLease(&pool, nullptr);
76}
77
78void FindBindingByIpFuzzTest(const uint8_t* data, size_t size)
79{
80    uint32_t ipAddress1 = ParseIpAddr("192.168.100.1");
81    uint32_t ipAddress2 = ParseIpAddr("192.168.100.2");
82    FindBindingByIp(ipAddress1);
83    FindBindingByIp(ipAddress2);
84}
85
86void DhcpMacAddrFuzzTest(const uint8_t* data, size_t size)
87{
88    uint8_t testMac1[DHCP_HWADDR_LENGTH] = {0x00, 0x0e, 0x3c, 0x65, 0x3a, 0x09, 0};
89    uint8_t testMac2[DHCP_HWADDR_LENGTH] = {0x00, 0x0e, 0x3c, 0x65, 0x3a, 0x0b, 0};
90    uint8_t testMac3[DHCP_HWADDR_LENGTH] = {0x00, 0x0e, 0x3c, 0x65, 0x3a, 0x0a, 0};
91    ReleaseBinding((testMac1));
92    ReleaseBinding((testMac2));
93    IsReserved((testMac1));
94    IsReserved((testMac3));
95}
96
97/* Fuzzer entry point */
98extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
99{
100    if ((data == nullptr) || (size <= OHOS::Wifi::U32_AT_SIZE_ZERO)) {
101        return 0;
102    }
103    sleep(DHCP_SLEEP_1);
104    OHOS::Wifi::DhcpAddressPoolFuzzTest(data, size);
105    OHOS::Wifi::FindBindingByIpFuzzTest(data, size);
106    OHOS::Wifi::DhcpMacAddrFuzzTest(data, size);
107    return 0;
108}
109}  // namespace Wifi
110}  // namespace OHOS
111