/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.telephony;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.text.format.Time;
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import com.android.internal.telephony.uicc.IccUtils;
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import java.util.Arrays;
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/**
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* Contains information elements for a GSM or UMTS ETWS warning notification.
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* Supported values for each element are defined in 3GPP TS 23.041.
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*
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* {@hide}
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*/
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public class SmsCbEtwsInfo implements Parcelable {
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/** ETWS warning type for earthquake. */
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public static final int ETWS_WARNING_TYPE_EARTHQUAKE = 0x00;
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/** ETWS warning type for tsunami. */
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public static final int ETWS_WARNING_TYPE_TSUNAMI = 0x01;
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/** ETWS warning type for earthquake and tsunami. */
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public static final int ETWS_WARNING_TYPE_EARTHQUAKE_AND_TSUNAMI = 0x02;
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/** ETWS warning type for test messages. */
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public static final int ETWS_WARNING_TYPE_TEST_MESSAGE = 0x03;
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/** ETWS warning type for other emergency types. */
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public static final int ETWS_WARNING_TYPE_OTHER_EMERGENCY = 0x04;
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/** Unknown ETWS warning type. */
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public static final int ETWS_WARNING_TYPE_UNKNOWN = -1;
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/** One of the ETWS warning type constants defined in this class. */
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private final int mWarningType;
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/** Whether or not to activate the emergency user alert tone and vibration. */
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private final boolean mEmergencyUserAlert;
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/** Whether or not to activate a popup alert. */
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private final boolean mActivatePopup;
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/** Whether ETWS primary message or not/ */
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private final boolean mPrimary;
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/**
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* 50-byte security information (ETWS primary notification for GSM only). As of Release 10,
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* 3GPP TS 23.041 states that the UE shall ignore the ETWS primary notification timestamp
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* and digital signature if received. Therefore it is treated as a raw byte array and
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* parceled with the broadcast intent if present, but the timestamp is only computed if an
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* application asks for the individual components.
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*/
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private final byte[] mWarningSecurityInformation;
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/** Create a new SmsCbEtwsInfo object with the specified values. */
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public SmsCbEtwsInfo(int warningType, boolean emergencyUserAlert, boolean activatePopup,
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boolean primary, byte[] warningSecurityInformation) {
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mWarningType = warningType;
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mEmergencyUserAlert = emergencyUserAlert;
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mActivatePopup = activatePopup;
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mPrimary = primary;
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mWarningSecurityInformation = warningSecurityInformation;
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}
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/** Create a new SmsCbEtwsInfo object from a Parcel. */
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SmsCbEtwsInfo(Parcel in) {
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mWarningType = in.readInt();
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mEmergencyUserAlert = (in.readInt() != 0);
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mActivatePopup = (in.readInt() != 0);
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mPrimary = (in.readInt() != 0);
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mWarningSecurityInformation = in.createByteArray();
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}
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/**
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* Flatten this object into a Parcel.
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*
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* @param dest The Parcel in which the object should be written.
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* @param flags Additional flags about how the object should be written (ignored).
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*/
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@Override
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public void writeToParcel(Parcel dest, int flags) {
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dest.writeInt(mWarningType);
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dest.writeInt(mEmergencyUserAlert ? 1 : 0);
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dest.writeInt(mActivatePopup ? 1 : 0);
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dest.writeInt(mPrimary ? 1 : 0);
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dest.writeByteArray(mWarningSecurityInformation);
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}
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/**
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* Returns the ETWS warning type.
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* @return a warning type such as {@link #ETWS_WARNING_TYPE_EARTHQUAKE}
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*/
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public int getWarningType() {
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return mWarningType;
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}
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/**
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* Returns the ETWS emergency user alert flag.
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* @return true to notify terminal to activate emergency user alert; false otherwise
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*/
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public boolean isEmergencyUserAlert() {
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return mEmergencyUserAlert;
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}
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/**
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* Returns the ETWS activate popup flag.
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* @return true to notify terminal to activate display popup; false otherwise
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*/
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public boolean isPopupAlert() {
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return mActivatePopup;
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}
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/**
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* Returns the ETWS format flag.
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* @return true if the message is primary message, otherwise secondary message
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*/
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public boolean isPrimary() {
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return mPrimary;
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}
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/**
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* Returns the Warning-Security-Information timestamp (GSM primary notifications only).
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* As of Release 10, 3GPP TS 23.041 states that the UE shall ignore this value if received.
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* @return a UTC timestamp in System.currentTimeMillis() format, or 0 if not present
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*/
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public long getPrimaryNotificationTimestamp() {
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if (mWarningSecurityInformation == null || mWarningSecurityInformation.length < 7) {
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return 0;
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}
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int year = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[0]);
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int month = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[1]);
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int day = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[2]);
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int hour = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[3]);
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int minute = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[4]);
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int second = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[5]);
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// For the timezone, the most significant bit of the
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// least significant nibble is the sign byte
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// (meaning the max range of this field is 79 quarter-hours,
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// which is more than enough)
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byte tzByte = mWarningSecurityInformation[6];
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// Mask out sign bit.
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int timezoneOffset = IccUtils.gsmBcdByteToInt((byte) (tzByte & (~0x08)));
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timezoneOffset = ((tzByte & 0x08) == 0) ? timezoneOffset : -timezoneOffset;
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Time time = new Time(Time.TIMEZONE_UTC);
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// We only need to support years above 2000.
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time.year = year + 2000;
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time.month = month - 1;
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time.monthDay = day;
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time.hour = hour;
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time.minute = minute;
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time.second = second;
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// Timezone offset is in quarter hours.
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return time.toMillis(true) - timezoneOffset * 15 * 60 * 1000;
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}
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/**
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* Returns the digital signature (GSM primary notifications only). As of Release 10,
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* 3GPP TS 23.041 states that the UE shall ignore this value if received.
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* @return a byte array containing a copy of the primary notification digital signature
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*/
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public byte[] getPrimaryNotificationSignature() {
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if (mWarningSecurityInformation == null || mWarningSecurityInformation.length < 50) {
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return null;
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}
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return Arrays.copyOfRange(mWarningSecurityInformation, 7, 50);
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}
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@Override
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public String toString() {
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return "SmsCbEtwsInfo{warningType=" + mWarningType + ", emergencyUserAlert="
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+ mEmergencyUserAlert + ", activatePopup=" + mActivatePopup + '}';
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}
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/**
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* Describe the kinds of special objects contained in the marshalled representation.
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* @return a bitmask indicating this Parcelable contains no special objects
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*/
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@Override
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public int describeContents() {
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return 0;
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}
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/** Creator for unparcelling objects. */
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public static final Creator<SmsCbEtwsInfo> CREATOR = new Creator<SmsCbEtwsInfo>() {
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@Override
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public SmsCbEtwsInfo createFromParcel(Parcel in) {
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return new SmsCbEtwsInfo(in);
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}
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@Override
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public SmsCbEtwsInfo[] newArray(int size) {
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return new SmsCbEtwsInfo[size];
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}
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};
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}
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