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/*
* Copyright (C) 2018 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 "fastboot_device.h"
#include <android-base/logging.h>
#include <android-base/strings.h>
#include <android/hardware/boot/1.0/IBootControl.h>
#include <android/hardware/fastboot/1.0/IFastboot.h>
#include <healthhalutils/HealthHalUtils.h>
#include <algorithm>
#include "constants.h"
#include "flashing.h"
#include "usb_client.h"
using ::android::hardware::hidl_string;
using ::android::hardware::boot::V1_0::IBootControl;
using ::android::hardware::boot::V1_0::Slot;
using ::android::hardware::fastboot::V1_0::IFastboot;
using ::android::hardware::health::V2_0::get_health_service;
namespace sph = std::placeholders;
FastbootDevice::FastbootDevice()
: kCommandMap({
{FB_CMD_SET_ACTIVE, SetActiveHandler},
{FB_CMD_DOWNLOAD, DownloadHandler},
{FB_CMD_GETVAR, GetVarHandler},
{FB_CMD_SHUTDOWN, ShutDownHandler},
{FB_CMD_REBOOT, RebootHandler},
{FB_CMD_REBOOT_BOOTLOADER, RebootBootloaderHandler},
{FB_CMD_REBOOT_FASTBOOT, RebootFastbootHandler},
{FB_CMD_REBOOT_RECOVERY, RebootRecoveryHandler},
{FB_CMD_ERASE, EraseHandler},
{FB_CMD_FLASH, FlashHandler},
{FB_CMD_CREATE_PARTITION, CreatePartitionHandler},
{FB_CMD_DELETE_PARTITION, DeletePartitionHandler},
{FB_CMD_RESIZE_PARTITION, ResizePartitionHandler},
{FB_CMD_UPDATE_SUPER, UpdateSuperHandler},
{FB_CMD_OEM, OemCmdHandler},
}),
transport_(std::make_unique<ClientUsbTransport>()),
boot_control_hal_(IBootControl::getService()),
health_hal_(get_health_service()),
fastboot_hal_(IFastboot::getService()),
active_slot_("") {}
FastbootDevice::~FastbootDevice() {
CloseDevice();
}
void FastbootDevice::CloseDevice() {
transport_->Close();
}
std::string FastbootDevice::GetCurrentSlot() {
// Check if a set_active ccommand was issued earlier since the boot control HAL
// returns the slot that is currently booted into.
if (!active_slot_.empty()) {
return active_slot_;
}
// Non-A/B devices must not have boot control HALs.
if (!boot_control_hal_) {
return "";
}
std::string suffix;
auto cb = [&suffix](hidl_string s) { suffix = s; };
boot_control_hal_->getSuffix(boot_control_hal_->getCurrentSlot(), cb);
return suffix;
}
bool FastbootDevice::WriteStatus(FastbootResult result, const std::string& message) {
constexpr size_t kResponseReasonSize = 4;
constexpr size_t kNumResponseTypes = 4; // "FAIL", "OKAY", "INFO", "DATA"
char buf[FB_RESPONSE_SZ];
constexpr size_t kMaxMessageSize = sizeof(buf) - kResponseReasonSize;
size_t msg_len = std::min(kMaxMessageSize, message.size());
constexpr const char* kResultStrings[kNumResponseTypes] = {RESPONSE_OKAY, RESPONSE_FAIL,
RESPONSE_INFO, RESPONSE_DATA};
if (static_cast<size_t>(result) >= kNumResponseTypes) {
return false;
}
memcpy(buf, kResultStrings[static_cast<size_t>(result)], kResponseReasonSize);
memcpy(buf + kResponseReasonSize, message.c_str(), msg_len);
size_t response_len = kResponseReasonSize + msg_len;
auto write_ret = this->get_transport()->Write(buf, response_len);
if (write_ret != static_cast<ssize_t>(response_len)) {
PLOG(ERROR) << "Failed to write " << message;
return false;
}
return true;
}
bool FastbootDevice::HandleData(bool read, std::vector<char>* data) {
auto read_write_data_size = read ? this->get_transport()->Read(data->data(), data->size())
: this->get_transport()->Write(data->data(), data->size());
if (read_write_data_size == -1 || static_cast<size_t>(read_write_data_size) != data->size()) {
return false;
}
return true;
}
void FastbootDevice::ExecuteCommands() {
char command[FB_RESPONSE_SZ + 1];
for (;;) {
auto bytes_read = transport_->Read(command, FB_RESPONSE_SZ);
if (bytes_read == -1) {
PLOG(ERROR) << "Couldn't read command";
return;
}
command[bytes_read] = '\0';
LOG(INFO) << "Fastboot command: " << command;
std::vector<std::string> args;
std::string cmd_name;
if (android::base::StartsWith(command, "oem ")) {
args = {command};
cmd_name = "oem";
} else {
args = android::base::Split(command, ":");
cmd_name = args[0];
}
auto found_command = kCommandMap.find(cmd_name);
if (found_command == kCommandMap.end()) {
WriteStatus(FastbootResult::FAIL, "Unrecognized command " + args[0]);
continue;
}
if (!found_command->second(this, args)) {
return;
}
}
}
bool FastbootDevice::WriteOkay(const std::string& message) {
return WriteStatus(FastbootResult::OKAY, message);
}
bool FastbootDevice::WriteFail(const std::string& message) {
return WriteStatus(FastbootResult::FAIL, message);
}
bool FastbootDevice::WriteInfo(const std::string& message) {
return WriteStatus(FastbootResult::INFO, message);
}
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