1/*
2 * Copyright (c) 2021-2022 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 "virtual_device.h"
17
18#include <fcntl.h>
19#include <securec.h>
20#include <unistd.h>
21
22#include "mmi_log.h"
23
24#undef MMI_LOG_TAG
25#define MMI_LOG_TAG "VirtualDevice"
26
27namespace OHOS {
28namespace MMI {
29namespace {
30using namespace OHOS::HiviewDFX;
31constexpr uint32_t MAX_NAME_LENGTH { 80 };
32
33bool DoIoctl(int32_t fd, int32_t request, const uint32_t value)
34{
35    int32_t rc = ioctl(fd, request, value);
36    if (rc < 0) {
37        MMI_HILOGE("Failed to ioctl");
38        return false;
39    }
40    return true;
41}
42} // namespace
43
44VirtualDevice::VirtualDevice(const char *deviceName, uint16_t productId)
45    : deviceName_(deviceName),
46      busType_(BUS_USB),
47      vendorId_(0x6006),
48      productId_(productId),
49      version_(1) {}
50
51VirtualDevice::~VirtualDevice()
52{
53    if (fd_ >= 0) {
54        ioctl(fd_, UI_DEV_DESTROY);
55        close(fd_);
56        fd_ = -1;
57    }
58}
59
60bool VirtualDevice::SetUp()
61{
62    fd_ = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
63    if (fd_ < 0) {
64        MMI_HILOGE("Failed to open uinput");
65        return false;
66    }
67    for (const auto &item : GetEventTypes()) {
68        if (!DoIoctl(fd_, UI_SET_EVBIT, item)) {
69            MMI_HILOGE("Error setting event type:%{public}u", item);
70            return false;
71        }
72    }
73    for (const auto &item : GetKeys()) {
74        if (!DoIoctl(fd_, UI_SET_KEYBIT, item)) {
75            MMI_HILOGE("Error setting key:%{public}u", item);
76            return false;
77        }
78    }
79    for (const auto &item : GetProperties()) {
80        if (!DoIoctl(fd_, UI_SET_PROPBIT, item)) {
81            MMI_HILOGE("Error setting property:%{public}u", item);
82            return false;
83        }
84    }
85    for (const auto &item : GetAbs()) {
86        if (!DoIoctl(fd_, UI_SET_ABSBIT, item)) {
87            MMI_HILOGE("Error setting property:%{public}u", item);
88            return false;
89        }
90    }
91    for (const auto &item : GetRelBits()) {
92        if (!DoIoctl(fd_, UI_SET_RELBIT, item)) {
93            MMI_HILOGE("Error setting rel:%{public}u", item);
94            return false;
95        }
96    }
97
98    return SetUpExt();
99}
100
101bool VirtualDevice::SetUpExt()
102{
103    errno_t ret = strncpy_s(dev_.name, MAX_NAME_LENGTH, deviceName_, sizeof(dev_.name));
104    if (ret != EOK) {
105        MMI_HILOGE("Failed to copy deviceName");
106        return false;
107    }
108    dev_.id.bustype = busType_;
109    dev_.id.vendor = vendorId_;
110    dev_.id.product = productId_;
111    dev_.id.version = version_;
112    if (write(fd_, &dev_, sizeof(dev_)) < 0) {
113        MMI_HILOGE("Unable to set input device info");
114        return false;
115    }
116    if (ioctl(fd_, UI_DEV_CREATE) < 0) {
117        MMI_HILOGE("Unable to create input device");
118        return false;
119    }
120    return true;
121}
122
123bool VirtualDevice::EmitEvent(uint16_t type, uint16_t code, uint32_t value) const
124{
125    struct input_event event {};
126    event.type = type;
127    event.code = code;
128    event.value = value;
129#ifndef __MUSL__
130    gettimeofday(&event.time, nullptr);
131#endif
132    if (write(fd_, &event, sizeof(event)) < static_cast<ssize_t>(sizeof(event))) {
133        MMI_HILOGE("Event write failed");
134        return false;
135    }
136    return true;
137}
138
139const std::vector<uint32_t> &VirtualDevice::GetEventTypes() const
140{
141    static const std::vector<uint32_t> evtTypes {};
142    return evtTypes;
143}
144
145const std::vector<uint32_t> &VirtualDevice::GetKeys() const
146{
147    static const std::vector<uint32_t> keys {};
148    return keys;
149}
150
151const std::vector<uint32_t> &VirtualDevice::GetProperties() const
152{
153    static const std::vector<uint32_t> properties {};
154    return properties;
155}
156
157const std::vector<uint32_t> &VirtualDevice::GetAbs() const
158{
159    static const std::vector<uint32_t> abs {};
160    return abs;
161}
162
163const std::vector<uint32_t> &VirtualDevice::GetRelBits() const
164{
165    static const std::vector<uint32_t> relBits {};
166    return relBits;
167}
168}
169}
170