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 <cstddef>
17#include <cstdint>
18#include <unistd.h>
19
20#include "UsbSubscriberTest.h"
21#include "hdf_log.h"
22#include "message_parcel.h"
23#include "usb_impl.h"
24#include "usbhost_fuzzer.h"
25#include "v1_0/usb_interface_stub.h"
26
27using namespace OHOS::HDI::Usb::V1_0;
28using OHOS::HDI::Usb::V1_0::UsbDev;
29using namespace OHOS::USB;
30
31namespace OHOS {
32constexpr size_t THRESHOLD = 10;
33constexpr int32_t OFFSET = 4;
34const std::u16string USB_INTERFACE_TOKEN = u"ohos.hdi.usb.v1_0.IUsbInterface";
35const int32_t SLEEP_TIME = 3;
36const int32_t DEFAULT_PORT_ID = 1;
37const int32_t DEFAULT_ROLE_HOST = 1;
38
39uint32_t Convert2Uint32(const uint8_t *ptr)
40{
41    if (ptr == nullptr) {
42        return 0;
43    }
44    /*
45     * Move the 0th digit 24 to the left, the first digit 16 to the left, the second digit 8 to the left,
46     * and the third digit no left
47     */
48    return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
49}
50
51bool DoSomethingInterestingWithMyAPI(const uint8_t *rawData, size_t size)
52{
53    if (rawData == nullptr) {
54        return false;
55    }
56    uint32_t code = Convert2Uint32(rawData);
57    rawData = rawData + OFFSET;
58    size = size - OFFSET;
59
60    MessageParcel data;
61    data.WriteInterfaceToken(USB_INTERFACE_TOKEN);
62    data.WriteBuffer(rawData, size);
63    data.RewindRead(0);
64    MessageParcel reply;
65    MessageOption option;
66
67    sptr<IUsbInterface> usbInterface = IUsbInterface::Get(false);
68    if (usbInterface == nullptr) {
69        HDF_LOGE("%{public}s:IUsbInterface::Get() failed.", __func__);
70        return false;
71    }
72
73    int32_t ret = usbInterface->SetPortRole(DEFAULT_PORT_ID, DEFAULT_ROLE_HOST, DEFAULT_ROLE_HOST);
74    sleep(SLEEP_TIME);
75    if (ret != HDF_SUCCESS) {
76        HDF_LOGE("%{public}s: set port role as host failed", __func__);
77        return ret;
78    }
79
80    sptr<UsbSubscriberTest> subscriber = new UsbSubscriberTest();
81    ret = usbInterface->BindUsbdSubscriber(subscriber);
82    if (ret != HDF_SUCCESS) {
83        HDF_LOGE("%{public}s: bind usbd subscriber failed", __func__);
84        return ret;
85    }
86
87    sleep(1);
88    UsbDev dev;
89    dev.busNum = subscriber->busNum_;
90    dev.devAddr = subscriber->devAddr_;
91    ret = usbInterface->OpenDevice(dev);
92    if (ret != HDF_SUCCESS) {
93        HDF_LOGE("%{public}s: open device failed", __func__);
94        return ret;
95    }
96
97    sptr<UsbInterfaceStub> impl = new UsbInterfaceStub(usbInterface);
98    if (impl == nullptr) {
99        HDF_LOGE("%{public}s:new UsbInterfaceStub failed.", __func__);
100        return false;
101    }
102    impl->OnRemoteRequest(code, data, reply, option);
103
104    return true;
105}
106} // namespace OHOS
107
108/* Fuzzer entry point */
109extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
110{
111    if (size < OHOS::THRESHOLD) {
112        return 0;
113    }
114
115    /* Run your code on data */
116    OHOS::DoSomethingInterestingWithMyAPI(data, size);
117    return 0;
118}
119