127 lines
4.0 KiB
Java
127 lines
4.0 KiB
Java
/* Copyright (C) 2016-2017 Andreas Shimokawa, Carsten Pfeiffer
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.service.devices.miband;
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import android.support.annotation.NonNull;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
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/**
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* Some helper methods for Mi1 and Mi1A firmware.
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*/
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public abstract class AbstractMi1FirmwareInfo extends AbstractMiFirmwareInfo {
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private static final Logger LOG = LoggerFactory.getLogger(AbstractMi1FirmwareInfo.class);
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private static final byte[] SINGLE_FW_HEADER = new byte[]{
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0,
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(byte) 0x98,
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0,
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(byte) 0x20,
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(byte) 0x89,
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4,
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0,
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(byte) 0x20
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};
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private static final int SINGLE_FW_HEADER_OFFSET = 0;
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private static final int MI1_FW_BASE_OFFSET = 1056;
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protected AbstractMi1FirmwareInfo(@NonNull byte[] wholeFirmwareBytes) {
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super(wholeFirmwareBytes);
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}
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@Override
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public boolean isSingleMiBandFirmware() {
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return true;
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}
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@Override
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public int getFirmwareOffset() {
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return 0;
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}
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@Override
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public int getFirmwareLength() {
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return wholeFirmwareBytes.length;
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}
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@Override
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public int getFirmwareVersion() {
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return (wholeFirmwareBytes[getOffsetFirmwareVersionMajor()] << 24)
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| (wholeFirmwareBytes[getOffsetFirmwareVersionMinor()] << 16)
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| (wholeFirmwareBytes[getOffsetFirmwareVersionRevision()] << 8)
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| wholeFirmwareBytes[getOffsetFirmwareVersionBuild()];
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}
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private int getOffsetFirmwareVersionMajor() {
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return MI1_FW_BASE_OFFSET + 3;
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}
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private int getOffsetFirmwareVersionMinor() {
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return MI1_FW_BASE_OFFSET + 2;
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}
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private int getOffsetFirmwareVersionRevision() {
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return MI1_FW_BASE_OFFSET + 1;
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}
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private int getOffsetFirmwareVersionBuild() {
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return MI1_FW_BASE_OFFSET;
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}
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@Override
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protected boolean isGenerallySupportedFirmware() {
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try {
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if (!isHeaderValid()) {
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LOG.info("unrecognized header");
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return false;
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}
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int majorVersion = getFirmwareVersionMajor();
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if (majorVersion == getSupportedMajorVersion()) {
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return true;
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} else {
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LOG.info("Only major version " + getSupportedMajorVersion() + " is supported: " + majorVersion);
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}
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} catch (IllegalArgumentException ex) {
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LOG.warn("invalid firmware or bug: " + ex.getLocalizedMessage(), ex);
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} catch (IndexOutOfBoundsException ex) {
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LOG.warn("not supported firmware: " + ex.getLocalizedMessage(), ex);
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}
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return false;
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}
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@Override
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protected boolean isHeaderValid() {
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// TODO: not sure if this is a correct check!
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return ArrayUtils.equals(wholeFirmwareBytes, SINGLE_FW_HEADER, SINGLE_FW_HEADER_OFFSET);
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}
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@Override
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public void checkValid() throws IllegalArgumentException {
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super.checkValid();
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if (wholeFirmwareBytes.length < SINGLE_FW_HEADER.length) {
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throw new IllegalArgumentException("firmware too small: " + wholeFirmwareBytes.length);
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}
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}
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protected abstract int getSupportedMajorVersion();
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}
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