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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "virtual_device_base.h"
#include <android-base/logging.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <string.h>
#include <unistd.h>
#include "log/log.h"
using cuttlefish_input_service::VirtualDeviceBase;
namespace {
bool DoIoctl(int fd, int request, const uint32_t value) {
int rc = ioctl(fd, request, value);
if (rc < 0) {
SLOGE("ioctl failed (%s)", strerror(errno));
return false;
}
return true;
}
} // namespace
VirtualDeviceBase::VirtualDeviceBase(const char* device_name,
uint16_t product_id)
: device_name_(device_name),
bus_type_(BUS_USB),
vendor_id_(0x6006),
product_id_(product_id),
version_(1) {}
VirtualDeviceBase::~VirtualDeviceBase() {
if (fd_ >= 0) {
close(fd_);
fd_ = -1;
}
}
bool VirtualDeviceBase::SetUp() {
fd_ = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
if (fd_ < 0) {
SLOGE("Failed to open /dev/uinput (%s)", strerror(errno));
return false;
}
strncpy(dev_.name, device_name_, sizeof(dev_.name));
dev_.id.bustype = bus_type_;
dev_.id.vendor = vendor_id_;
dev_.id.product = product_id_;
dev_.id.version = version_;
for (uint32_t evt_type : GetEventTypes()) {
if (!DoIoctl(fd_, UI_SET_EVBIT, evt_type)) {
SLOGE("Error setting event type: %" PRIu32, evt_type);
return false;
}
}
for (uint32_t key : GetKeys()) {
if (!DoIoctl(fd_, UI_SET_KEYBIT, key)) {
SLOGE("Error setting key: %" PRIu32, key);
return false;
}
}
for (uint32_t property : GetProperties()) {
if (!DoIoctl(fd_, UI_SET_PROPBIT, property)) {
SLOGE("Error setting property: %" PRIu32, property);
return false;
}
}
for (uint32_t abs : GetAbs()) {
if (!DoIoctl(fd_, UI_SET_ABSBIT, abs)) {
SLOGE("Error setting abs: %" PRIu32, abs);
return false;
}
}
if (write(fd_, &dev_, sizeof(dev_)) < 0) {
SLOGE("Unable to set input device info (%s)", strerror(errno));
return false;
}
if (ioctl(fd_, UI_DEV_CREATE) < 0) {
SLOGE("Unable to create input device (%s)", strerror(errno));
return false;
}
LOG(INFO) << "set up virtual device";
return true;
}
bool VirtualDeviceBase::EmitEvent(uint16_t type,
uint16_t code,
uint32_t value) {
struct input_event event {};
event.type = type;
event.code = code;
event.value = value;
if (write(fd_, &event, sizeof(event)) < static_cast<ssize_t>(sizeof(event))) {
SLOGE("Event write failed (%s): aborting", strerror(errno));
return false;
}
return true;
}
// By default devices have no event types, keys, properties or absolutes,
// subclasses can override this behavior if necessary.
const std::vector<const uint32_t>& VirtualDeviceBase::GetEventTypes() const {
static const std::vector<const uint32_t> evt_types{};
return evt_types;
}
const std::vector<const uint32_t>& VirtualDeviceBase::GetKeys() const {
static const std::vector<const uint32_t> keys{};
return keys;
}
const std::vector<const uint32_t>& VirtualDeviceBase::GetProperties() const {
static const std::vector<const uint32_t> properties{};
return properties;
}
const std::vector<const uint32_t>& VirtualDeviceBase::GetAbs() const {
static const std::vector<const uint32_t> abs{};
return abs;
}
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