/*
 * Copyright (C) 2006 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.
 */

package com.android.internal.telephony.gsm;

import android.telephony.PhoneNumberUtils;
import android.text.format.Time;
import android.telephony.Rlog;
import android.content.res.Resources;
import android.text.TextUtils;

import com.android.internal.telephony.EncodeException;
import com.android.internal.telephony.GsmAlphabet;
import com.android.internal.telephony.GsmAlphabet.TextEncodingDetails;
import com.android.internal.telephony.uicc.IccUtils;
import com.android.internal.telephony.SmsHeader;
import com.android.internal.telephony.SmsMessageBase;
import com.android.internal.telephony.Sms7BitEncodingTranslator;

import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;

import static com.android.internal.telephony.SmsConstants.MessageClass;
import static com.android.internal.telephony.SmsConstants.ENCODING_UNKNOWN;
import static com.android.internal.telephony.SmsConstants.ENCODING_7BIT;
import static com.android.internal.telephony.SmsConstants.ENCODING_8BIT;
import static com.android.internal.telephony.SmsConstants.ENCODING_16BIT;
import static com.android.internal.telephony.SmsConstants.ENCODING_KSC5601;
import static com.android.internal.telephony.SmsConstants.MAX_USER_DATA_SEPTETS;
import static com.android.internal.telephony.SmsConstants.MAX_USER_DATA_BYTES;
import static com.android.internal.telephony.SmsConstants.MAX_USER_DATA_BYTES_WITH_HEADER;

A Short Message Service message.
/**
 * A Short Message Service message.
 *
 */
public class SmsMessage extends SmsMessageBase {
    static final String LOG_TAG = "SmsMessage";
    private static final boolean VDBG = false;

    private MessageClass messageClass;

    
TP-Message-Type-Indicator
9.2.3
/**
     * TP-Message-Type-Indicator
     * 9.2.3
     */
    private int mMti;

    
TP-Protocol-Identifier (TP-PID) /** TP-Protocol-Identifier (TP-PID) */
    private int mProtocolIdentifier;

    // TP-Data-Coding-Scheme
    // see TS 23.038
    private int mDataCodingScheme;

    // TP-Reply-Path
    // e.g. 23.040 9.2.2.1
    private boolean mReplyPathPresent = false;

    
The address of the receiver. /** The address of the receiver. */
    private GsmSmsAddress mRecipientAddress;

    
 TP-Status - status of a previously submitted SMS.
 This field applies to SMS-STATUS-REPORT messages.  0 indicates success;
 see TS 23.040, 9.2.3.15 for description of other possible values.
/**
     *  TP-Status - status of a previously submitted SMS.
     *  This field applies to SMS-STATUS-REPORT messages.  0 indicates success;
     *  see TS 23.040, 9.2.3.15 for description of other possible values.
     */
    private int mStatus;

    
 TP-Status - status of a previously submitted SMS.
 This field is true iff the message is a SMS-STATUS-REPORT message.
/**
     *  TP-Status - status of a previously submitted SMS.
     *  This field is true iff the message is a SMS-STATUS-REPORT message.
     */
    private boolean mIsStatusReportMessage = false;

    private int mVoiceMailCount = 0;

    private static final int VALIDITY_PERIOD_FORMAT_NONE = 0x00;
    private static final int VALIDITY_PERIOD_FORMAT_ENHANCED = 0x01;
    private static final int VALIDITY_PERIOD_FORMAT_RELATIVE = 0x02;
    private static final int VALIDITY_PERIOD_FORMAT_ABSOLUTE = 0x03;

    //Validity Period min - 5 mins
    private static final int VALIDITY_PERIOD_MIN = 5;
    //Validity Period max - 63 weeks
    private static final int VALIDITY_PERIOD_MAX = 635040;

    private static final int INVALID_VALIDITY_PERIOD = -1;

    public static class SubmitPdu extends SubmitPduBase {
    }

    
Create an SmsMessage from a raw PDU.
/**
     * Create an SmsMessage from a raw PDU.
     */
    public static SmsMessage createFromPdu(byte[] pdu) {
        try {
            SmsMessage msg = new SmsMessage();
            msg.parsePdu(pdu);
            return msg;
        } catch (RuntimeException ex) {
            Rlog.e(LOG_TAG, "SMS PDU parsing failed: ", ex);
            return null;
        } catch (OutOfMemoryError e) {
            Rlog.e(LOG_TAG, "SMS PDU parsing failed with out of memory: ", e);
            return null;
        }
    }

    
3GPP TS 23.040 9.2.3.9 specifies that Type Zero messages are indicated
by TP_PID field set to value 0x40
/**
     * 3GPP TS 23.040 9.2.3.9 specifies that Type Zero messages are indicated
     * by TP_PID field set to value 0x40
     */
    public boolean isTypeZero() {
        return (mProtocolIdentifier == 0x40);
    }

    
TS 27.005 3.4.1 lines[0] and lines[1] are the two lines read from the
+CMT unsolicited response (PDU mode, of course)
 +CMT: [<alpha>],
Only public for debugging
{@hide}
/**
     * TS 27.005 3.4.1 lines[0] and lines[1] are the two lines read from the
     * +CMT unsolicited response (PDU mode, of course)
     *  +CMT: [&lt;alpha>],<length><CR><LF><pdu>
     *
     * Only public for debugging
     *
     * {@hide}
     */
    public static SmsMessage newFromCMT(byte[] pdu) {
        try {
            SmsMessage msg = new SmsMessage();
            msg.parsePdu(pdu);
            return msg;
        } catch (RuntimeException ex) {
            Rlog.e(LOG_TAG, "SMS PDU parsing failed: ", ex);
            return null;
        }
    }

    
@hide
/** @hide */
    public static SmsMessage newFromCDS(byte[] pdu) {
        try {
            SmsMessage msg = new SmsMessage();
            msg.parsePdu(pdu);
            return msg;
        } catch (RuntimeException ex) {
            Rlog.e(LOG_TAG, "CDS SMS PDU parsing failed: ", ex);
            return null;
        }
    }

    
Create an SmsMessage from an SMS EF record.
Params:
index – Index of SMS record. This should be index in ArrayList
             returned by SmsManager.getAllMessagesFromSim + 1.
data – Record data.
Returns:
An SmsMessage representing the record.
@hide
/**
     * Create an SmsMessage from an SMS EF record.
     *
     * @param index Index of SMS record. This should be index in ArrayList
     *              returned by SmsManager.getAllMessagesFromSim + 1.
     * @param data Record data.
     * @return An SmsMessage representing the record.
     *
     * @hide
     */
    public static SmsMessage createFromEfRecord(int index, byte[] data) {
        try {
            SmsMessage msg = new SmsMessage();

            msg.mIndexOnIcc = index;

            // First byte is status: RECEIVED_READ, RECEIVED_UNREAD, STORED_SENT,
            // or STORED_UNSENT
            // See TS 51.011 10.5.3
            if ((data[0] & 1) == 0) {
                Rlog.w(LOG_TAG,
                        "SMS parsing failed: Trying to parse a free record");
                return null;
            } else {
                msg.mStatusOnIcc = data[0] & 0x07;
            }

            int size = data.length - 1;

            // Note: Data may include trailing FF's.  That's OK; message
            // should still parse correctly.
            byte[] pdu = new byte[size];
            System.arraycopy(data, 1, pdu, 0, size);
            msg.parsePdu(pdu);
            return msg;
        } catch (RuntimeException ex) {
            Rlog.e(LOG_TAG, "SMS PDU parsing failed: ", ex);
            return null;
        }
    }

    
Get the TP-Layer-Length for the given SMS-SUBMIT PDU Basically, the
length in bytes (not hex chars) less the SMSC header
/**
     * Get the TP-Layer-Length for the given SMS-SUBMIT PDU Basically, the
     * length in bytes (not hex chars) less the SMSC header
     */
    public static int getTPLayerLengthForPDU(String pdu) {
        int len = pdu.length() / 2;
        int smscLen = Integer.parseInt(pdu.substring(0, 2), 16);

        return len - smscLen - 1;
    }

    
Get Encoded Relative Validty Period Value from Validity period in mins.
Params:
validityPeriod – Validity period in mins.
Refer specification 3GPP TS 23.040 V6.8.1 section 9.2.3.12.1.
||relValidityPeriod (TP-VP)  ||                 ||  validityPeriod   ||
     0 to 143                            --->       (TP-VP + 1) x 5 minutes
     144 to 167                         --->        12 hours + ((TP-VP -143) x 30 minutes)
     168 to 196                         --->        (TP-VP - 166) x 1 day
     197 to 255                         --->        (TP-VP - 192) x 1 week
Returns:
relValidityPeriod Encoded Relative Validity Period Value.
@hide
/**
     * Get Encoded Relative Validty Period Value from Validity period in mins.
     *
     * @param validityPeriod Validity period in mins.
     *
     * Refer specification 3GPP TS 23.040 V6.8.1 section 9.2.3.12.1.
     * ||relValidityPeriod (TP-VP)  ||                 ||  validityPeriod   ||
     *
     *      0 to 143                            --->       (TP-VP + 1) x 5 minutes
     *
     *      144 to 167                         --->        12 hours + ((TP-VP -143) x 30 minutes)
     *
     *      168 to 196                         --->        (TP-VP - 166) x 1 day
     *
     *      197 to 255                         --->        (TP-VP - 192) x 1 week
     *
     * @return relValidityPeriod Encoded Relative Validity Period Value.
     * @hide
     */
    public static int getRelativeValidityPeriod(int validityPeriod) {
        int relValidityPeriod = INVALID_VALIDITY_PERIOD;

        if (validityPeriod < VALIDITY_PERIOD_MIN  || validityPeriod > VALIDITY_PERIOD_MAX) {
            Rlog.e(LOG_TAG,"Invalid Validity Period" + validityPeriod);
            return relValidityPeriod;
        }

        if (validityPeriod <= 720) {
            relValidityPeriod = (validityPeriod  / 5) - 1;
        } else if (validityPeriod <= 1440) {
            relValidityPeriod = ((validityPeriod - 720) / 30) + 143;
        } else if (validityPeriod <= 43200) {
            relValidityPeriod = (validityPeriod  / 1440) + 166;
        } else if (validityPeriod <= 635040) {
            relValidityPeriod = (validityPeriod  / 10080) + 192;
        }
        return relValidityPeriod;
    }

    
Get an SMS-SUBMIT PDU for a destination address and a message
Params:
scAddress – Service Centre address.  Null means use default.
Returns:
a SubmitPdu containing the encoded SC
        address, if applicable, and the encoded message.
        Returns null on encode error.
@hide
/**
     * Get an SMS-SUBMIT PDU for a destination address and a message
     *
     * @param scAddress Service Centre address.  Null means use default.
     * @return a <code>SubmitPdu</code> containing the encoded SC
     *         address, if applicable, and the encoded message.
     *         Returns null on encode error.
     * @hide
     */
    public static SubmitPdu getSubmitPdu(String scAddress,
            String destinationAddress, String message,
            boolean statusReportRequested, byte[] header) {
        return getSubmitPdu(scAddress, destinationAddress, message, statusReportRequested, header,
                ENCODING_UNKNOWN, 0, 0);
    }


    
Get an SMS-SUBMIT PDU for a destination address and a message using the
specified encoding.
Params:
scAddress – Service Centre address.  Null means use default.
encoding – Encoding defined by constants in
       com.android.internal.telephony.SmsConstants.ENCODING_*
languageTable – 
languageShiftTable – 
Returns:
a SubmitPdu containing the encoded SC
        address, if applicable, and the encoded message.
        Returns null on encode error.
@hide
/**
     * Get an SMS-SUBMIT PDU for a destination address and a message using the
     * specified encoding.
     *
     * @param scAddress Service Centre address.  Null means use default.
     * @param encoding Encoding defined by constants in
     *        com.android.internal.telephony.SmsConstants.ENCODING_*
     * @param languageTable
     * @param languageShiftTable
     * @return a <code>SubmitPdu</code> containing the encoded SC
     *         address, if applicable, and the encoded message.
     *         Returns null on encode error.
     * @hide
     */
    public static SubmitPdu getSubmitPdu(String scAddress,
            String destinationAddress, String message,
            boolean statusReportRequested, byte[] header, int encoding,
            int languageTable, int languageShiftTable) {
        return getSubmitPdu(scAddress, destinationAddress, message, statusReportRequested,
            header, encoding, languageTable, languageShiftTable, -1);
    }

    
Get an SMS-SUBMIT PDU for a destination address and a message using the
specified encoding.
Params:
scAddress – Service Centre address.  Null means use default.
encoding – Encoding defined by constants in
       com.android.internal.telephony.SmsConstants.ENCODING_*
languageTable – 
languageShiftTable – 
validityPeriod – Validity Period of the message in Minutes.
Returns:
a SubmitPdu containing the encoded SC
        address, if applicable, and the encoded message.
        Returns null on encode error.
@hide
/**
     * Get an SMS-SUBMIT PDU for a destination address and a message using the
     * specified encoding.
     *
     * @param scAddress Service Centre address.  Null means use default.
     * @param encoding Encoding defined by constants in
     *        com.android.internal.telephony.SmsConstants.ENCODING_*
     * @param languageTable
     * @param languageShiftTable
     * @param validityPeriod Validity Period of the message in Minutes.
     * @return a <code>SubmitPdu</code> containing the encoded SC
     *         address, if applicable, and the encoded message.
     *         Returns null on encode error.
     * @hide
     */
    public static SubmitPdu getSubmitPdu(String scAddress,
            String destinationAddress, String message,
            boolean statusReportRequested, byte[] header, int encoding,
            int languageTable, int languageShiftTable, int validityPeriod) {

        // Perform null parameter checks.
        if (message == null || destinationAddress == null) {
            return null;
        }

        if (encoding == ENCODING_UNKNOWN) {
            // Find the best encoding to use
            TextEncodingDetails ted = calculateLength(message, false);
            encoding = ted.codeUnitSize;
            languageTable = ted.languageTable;
            languageShiftTable = ted.languageShiftTable;

            if (encoding == ENCODING_7BIT &&
                    (languageTable != 0 || languageShiftTable != 0)) {
                if (header != null) {
                    SmsHeader smsHeader = SmsHeader.fromByteArray(header);
                    if (smsHeader.languageTable != languageTable
                            || smsHeader.languageShiftTable != languageShiftTable) {
                        Rlog.w(LOG_TAG, "Updating language table in SMS header: "
                                + smsHeader.languageTable + " -> " + languageTable + ", "
                                + smsHeader.languageShiftTable + " -> " + languageShiftTable);
                        smsHeader.languageTable = languageTable;
                        smsHeader.languageShiftTable = languageShiftTable;
                        header = SmsHeader.toByteArray(smsHeader);
                    }
                } else {
                    SmsHeader smsHeader = new SmsHeader();
                    smsHeader.languageTable = languageTable;
                    smsHeader.languageShiftTable = languageShiftTable;
                    header = SmsHeader.toByteArray(smsHeader);
                }
            }
        }

        SubmitPdu ret = new SubmitPdu();

        int validityPeriodFormat = VALIDITY_PERIOD_FORMAT_NONE;
        int relativeValidityPeriod = INVALID_VALIDITY_PERIOD;

        // TP-Validity-Period-Format (TP-VPF) in 3GPP TS 23.040 V6.8.1 section 9.2.3.3
        //bit 4:3 = 10 - TP-VP field present - relative format
        if((relativeValidityPeriod = getRelativeValidityPeriod(validityPeriod)) >= 0) {
            validityPeriodFormat = VALIDITY_PERIOD_FORMAT_RELATIVE;
        }

        byte mtiByte = (byte)(0x01 | (validityPeriodFormat << 0x03) |
                (header != null ? 0x40 : 0x00));

        ByteArrayOutputStream bo = getSubmitPduHead(
                scAddress, destinationAddress, mtiByte,
                statusReportRequested, ret);

        // Skip encoding pdu if error occurs when create pdu head and the error will be handled
        // properly later on encodedMessage sanity check.
        if (bo == null) return ret;

        // User Data (and length)
        byte[] userData;
        try {
            if (encoding == ENCODING_7BIT) {
                userData = GsmAlphabet.stringToGsm7BitPackedWithHeader(message, header,
                        languageTable, languageShiftTable);
            } else { //assume UCS-2
                try {
                    userData = encodeUCS2(message, header);
                } catch(UnsupportedEncodingException uex) {
                    Rlog.e(LOG_TAG,
                            "Implausible UnsupportedEncodingException ",
                            uex);
                    return null;
                }
            }
        } catch (EncodeException ex) {
            // Encoding to the 7-bit alphabet failed. Let's see if we can
            // send it as a UCS-2 encoded message
            try {
                userData = encodeUCS2(message, header);
                encoding = ENCODING_16BIT;
            } catch(UnsupportedEncodingException uex) {
                Rlog.e(LOG_TAG,
                        "Implausible UnsupportedEncodingException ",
                        uex);
                return null;
            }
        }

        if (encoding == ENCODING_7BIT) {
            if ((0xff & userData[0]) > MAX_USER_DATA_SEPTETS) {
                // Message too long
                Rlog.e(LOG_TAG, "Message too long (" + (0xff & userData[0]) + " septets)");
                return null;
            }
            // TP-Data-Coding-Scheme
            // Default encoding, uncompressed
            // To test writing messages to the SIM card, change this value 0x00
            // to 0x12, which means "bits 1 and 0 contain message class, and the
            // class is 2". Note that this takes effect for the sender. In other
            // words, messages sent by the phone with this change will end up on
            // the receiver's SIM card. You can then send messages to yourself
            // (on a phone with this change) and they'll end up on the SIM card.
            bo.write(0x00);
        } else { // assume UCS-2
            if ((0xff & userData[0]) > MAX_USER_DATA_BYTES) {
                // Message too long
                Rlog.e(LOG_TAG, "Message too long (" + (0xff & userData[0]) + " bytes)");
                return null;
            }
            // TP-Data-Coding-Scheme
            // UCS-2 encoding, uncompressed
            bo.write(0x08);
        }

        if (validityPeriodFormat == VALIDITY_PERIOD_FORMAT_RELATIVE) {
            // ( TP-Validity-Period - relative format)
            bo.write(relativeValidityPeriod);
        }

        bo.write(userData, 0, userData.length);
        ret.encodedMessage = bo.toByteArray();
        return ret;
    }

    
Packs header and UCS-2 encoded message. Includes TP-UDL & TP-UDHL if necessary
Throws:
UnsupportedEncodingException – 
Returns:
encoded message as UCS2/**
     * Packs header and UCS-2 encoded message. Includes TP-UDL & TP-UDHL if necessary
     *
     * @return encoded message as UCS2
     * @throws UnsupportedEncodingException
     */
    private static byte[] encodeUCS2(String message, byte[] header)
        throws UnsupportedEncodingException {
        byte[] userData, textPart;
        textPart = message.getBytes("utf-16be");

        if (header != null) {
            // Need 1 byte for UDHL
            userData = new byte[header.length + textPart.length + 1];

            userData[0] = (byte)header.length;
            System.arraycopy(header, 0, userData, 1, header.length);
            System.arraycopy(textPart, 0, userData, header.length + 1, textPart.length);
        }
        else {
            userData = textPart;
        }
        byte[] ret = new byte[userData.length+1];
        ret[0] = (byte) (userData.length & 0xff );
        System.arraycopy(userData, 0, ret, 1, userData.length);
        return ret;
    }

    
Get an SMS-SUBMIT PDU for a destination address and a message
Params:
scAddress – Service Centre address.  Null means use default.
Returns:
a SubmitPdu containing the encoded SC
        address, if applicable, and the encoded message.
        Returns null on encode error./**
     * Get an SMS-SUBMIT PDU for a destination address and a message
     *
     * @param scAddress Service Centre address.  Null means use default.
     * @return a <code>SubmitPdu</code> containing the encoded SC
     *         address, if applicable, and the encoded message.
     *         Returns null on encode error.
     */
    public static SubmitPdu getSubmitPdu(String scAddress,
            String destinationAddress, String message,
            boolean statusReportRequested) {

        return getSubmitPdu(scAddress, destinationAddress, message, statusReportRequested, null);
    }

    
Get an SMS-SUBMIT PDU for a destination address and a message
Params:
scAddress – Service Centre address.  Null means use default.
destinationAddress – the address of the destination for the message
statusReportRequested – staus report of the message Requested
validityPeriod – Validity Period of the message in Minutes.
Returns:
a SubmitPdu containing the encoded SC
        address, if applicable, and the encoded message.
        Returns null on encode error./**
     * Get an SMS-SUBMIT PDU for a destination address and a message
     *
     * @param scAddress Service Centre address.  Null means use default.
     * @param destinationAddress the address of the destination for the message
     * @param statusReportRequested staus report of the message Requested
     * @param validityPeriod Validity Period of the message in Minutes.
     * @return a <code>SubmitPdu</code> containing the encoded SC
     *         address, if applicable, and the encoded message.
     *         Returns null on encode error.
     */
    public static SubmitPdu getSubmitPdu(String scAddress,
            String destinationAddress, String message,
            boolean statusReportRequested, int validityPeriod) {
        return getSubmitPdu(scAddress, destinationAddress, message, statusReportRequested,
                null, ENCODING_UNKNOWN, 0, 0, validityPeriod);
    }

    
Get an SMS-SUBMIT PDU for a data message to a destination address & port
Params:
scAddress – Service Centre address. null == use default
destinationAddress – the address of the destination for the message
destinationPort – the port to deliver the message to at the
       destination
data – the data for the message
Returns:
a SubmitPdu containing the encoded SC
        address, if applicable, and the encoded message.
        Returns null on encode error./**
     * Get an SMS-SUBMIT PDU for a data message to a destination address &amp; port
     *
     * @param scAddress Service Centre address. null == use default
     * @param destinationAddress the address of the destination for the message
     * @param destinationPort the port to deliver the message to at the
     *        destination
     * @param data the data for the message
     * @return a <code>SubmitPdu</code> containing the encoded SC
     *         address, if applicable, and the encoded message.
     *         Returns null on encode error.
     */
    public static SubmitPdu getSubmitPdu(String scAddress,
            String destinationAddress, int destinationPort, byte[] data,
            boolean statusReportRequested) {

        SmsHeader.PortAddrs portAddrs = new SmsHeader.PortAddrs();
        portAddrs.destPort = destinationPort;
        portAddrs.origPort = 0;
        portAddrs.areEightBits = false;

        SmsHeader smsHeader = new SmsHeader();
        smsHeader.portAddrs = portAddrs;

        byte[] smsHeaderData = SmsHeader.toByteArray(smsHeader);

        if ((data.length + smsHeaderData.length + 1) > MAX_USER_DATA_BYTES) {
            Rlog.e(LOG_TAG, "SMS data message may only contain "
                    + (MAX_USER_DATA_BYTES - smsHeaderData.length - 1) + " bytes");
            return null;
        }

        SubmitPdu ret = new SubmitPdu();
        ByteArrayOutputStream bo = getSubmitPduHead(
                scAddress, destinationAddress, (byte) 0x41, // MTI = SMS-SUBMIT,
                                                            // TP-UDHI = true
                statusReportRequested, ret);
        // Skip encoding pdu if error occurs when create pdu head and the error will be handled
        // properly later on encodedMessage sanity check.
        if (bo == null) return ret;

        // TP-Data-Coding-Scheme
        // No class, 8 bit data
        bo.write(0x04);

        // (no TP-Validity-Period)

        // Total size
        bo.write(data.length + smsHeaderData.length + 1);

        // User data header
        bo.write(smsHeaderData.length);
        bo.write(smsHeaderData, 0, smsHeaderData.length);

        // User data
        bo.write(data, 0, data.length);

        ret.encodedMessage = bo.toByteArray();
        return ret;
    }

    
Create the beginning of a SUBMIT PDU. This is the part of the SUBMIT PDU that is common to the two versions of getSubmitPdu, one of which takes a byte array and the other of which takes a String.
Params:
scAddress – Service Centre address. null == use default
destinationAddress – the address of the destination for the message
mtiByte – 
ret – SubmitPdu containing the encoded SC
       address, if applicable, and the encoded message. Returns null on encode error./**
     * Create the beginning of a SUBMIT PDU.  This is the part of the
     * SUBMIT PDU that is common to the two versions of {@link #getSubmitPdu},
     * one of which takes a byte array and the other of which takes a
     * <code>String</code>.
     *
     * @param scAddress Service Centre address. null == use default
     * @param destinationAddress the address of the destination for the message
     * @param mtiByte
     * @param ret <code>SubmitPdu</code> containing the encoded SC
     *        address, if applicable, and the encoded message. Returns null on encode error.
     */
    private static ByteArrayOutputStream getSubmitPduHead(
            String scAddress, String destinationAddress, byte mtiByte,
            boolean statusReportRequested, SubmitPdu ret) {
        ByteArrayOutputStream bo = new ByteArrayOutputStream(
                MAX_USER_DATA_BYTES + 40);

        // SMSC address with length octet, or 0
        if (scAddress == null) {
            ret.encodedScAddress = null;
        } else {
            ret.encodedScAddress = PhoneNumberUtils.networkPortionToCalledPartyBCDWithLength(
                    scAddress);
        }

        // TP-Message-Type-Indicator (and friends)
        if (statusReportRequested) {
            // Set TP-Status-Report-Request bit.
            mtiByte |= 0x20;
            if (VDBG) Rlog.d(LOG_TAG, "SMS status report requested");
        }
        bo.write(mtiByte);

        // space for TP-Message-Reference
        bo.write(0);

        byte[] daBytes;

        daBytes = PhoneNumberUtils.networkPortionToCalledPartyBCD(destinationAddress);

        // return empty pduHead for invalid destination address
        if (daBytes == null) return null;

        // destination address length in BCD digits, ignoring TON byte and pad
        // TODO Should be better.
        bo.write((daBytes.length - 1) * 2
                - ((daBytes[daBytes.length - 1] & 0xf0) == 0xf0 ? 1 : 0));

        // destination address
        bo.write(daBytes, 0, daBytes.length);

        // TP-Protocol-Identifier
        bo.write(0);
        return bo;
    }

    private static class PduParser {
        byte mPdu[];
        int mCur;
        SmsHeader mUserDataHeader;
        byte[] mUserData;
        int mUserDataSeptetPadding;

        PduParser(byte[] pdu) {
            mPdu = pdu;
            mCur = 0;
            mUserDataSeptetPadding = 0;
        }

        
Parse and return the SC address prepended to SMS messages coming via
the TS 27.005 / AT interface.  Returns null on invalid address
/**
         * Parse and return the SC address prepended to SMS messages coming via
         * the TS 27.005 / AT interface.  Returns null on invalid address
         */
        String getSCAddress() {
            int len;
            String ret;

            // length of SC Address
            len = getByte();

            if (len == 0) {
                // no SC address
                ret = null;
            } else {
                // SC address
                try {
                    ret = PhoneNumberUtils.calledPartyBCDToString(
                            mPdu, mCur, len, PhoneNumberUtils.BCD_EXTENDED_TYPE_CALLED_PARTY);
                } catch (RuntimeException tr) {
                    Rlog.d(LOG_TAG, "invalid SC address: ", tr);
                    ret = null;
                }
            }

            mCur += len;

            return ret;
        }

        
returns non-sign-extended byte value
/**
         * returns non-sign-extended byte value
         */
        int getByte() {
            return mPdu[mCur++] & 0xff;
        }

        
Any address except the SC address (eg, originating address) See TS
23.040 9.1.2.5
/**
         * Any address except the SC address (eg, originating address) See TS
         * 23.040 9.1.2.5
         */
        GsmSmsAddress getAddress() {
            GsmSmsAddress ret;

            // "The Address-Length field is an integer representation of
            // the number field, i.e. excludes any semi-octet containing only
            // fill bits."
            // The TOA field is not included as part of this
            int addressLength = mPdu[mCur] & 0xff;
            int lengthBytes = 2 + (addressLength + 1) / 2;

            try {
                ret = new GsmSmsAddress(mPdu, mCur, lengthBytes);
            } catch (ParseException e) {
                ret = null;
                //This is caught by createFromPdu(byte[] pdu)
                throw new RuntimeException(e.getMessage());
            }

            mCur += lengthBytes;

            return ret;
        }

        
Parses an SC timestamp and returns a currentTimeMillis()-style
timestamp
/**
         * Parses an SC timestamp and returns a currentTimeMillis()-style
         * timestamp
         */

        long getSCTimestampMillis() {
            // TP-Service-Centre-Time-Stamp
            int year = IccUtils.gsmBcdByteToInt(mPdu[mCur++]);
            int month = IccUtils.gsmBcdByteToInt(mPdu[mCur++]);
            int day = IccUtils.gsmBcdByteToInt(mPdu[mCur++]);
            int hour = IccUtils.gsmBcdByteToInt(mPdu[mCur++]);
            int minute = IccUtils.gsmBcdByteToInt(mPdu[mCur++]);
            int second = IccUtils.gsmBcdByteToInt(mPdu[mCur++]);

            // For the timezone, the most significant bit of the
            // least significant nibble is the sign byte
            // (meaning the max range of this field is 79 quarter-hours,
            // which is more than enough)

            byte tzByte = mPdu[mCur++];

            // Mask out sign bit.
            int timezoneOffset = IccUtils.gsmBcdByteToInt((byte) (tzByte & (~0x08)));

            timezoneOffset = ((tzByte & 0x08) == 0) ? timezoneOffset : -timezoneOffset;

            Time time = new Time(Time.TIMEZONE_UTC);

            // It's 2006.  Should I really support years < 2000?
            time.year = year >= 90 ? year + 1900 : year + 2000;
            time.month = month - 1;
            time.monthDay = day;
            time.hour = hour;
            time.minute = minute;
            time.second = second;

            // Timezone offset is in quarter hours.
            return time.toMillis(true) - (timezoneOffset * 15 * 60 * 1000);
        }

        
Pulls the user data out of the PDU, and separates the payload from
the header if there is one.
Params:
hasUserDataHeader – true if there is a user data header
dataInSeptets – true if the data payload is in septets instead
 of octets
Returns:
the number of septets or octets in the user data payload/**
         * Pulls the user data out of the PDU, and separates the payload from
         * the header if there is one.
         *
         * @param hasUserDataHeader true if there is a user data header
         * @param dataInSeptets true if the data payload is in septets instead
         *  of octets
         * @return the number of septets or octets in the user data payload
         */
        int constructUserData(boolean hasUserDataHeader, boolean dataInSeptets) {
            int offset = mCur;
            int userDataLength = mPdu[offset++] & 0xff;
            int headerSeptets = 0;
            int userDataHeaderLength = 0;

            if (hasUserDataHeader) {
                userDataHeaderLength = mPdu[offset++] & 0xff;

                byte[] udh = new byte[userDataHeaderLength];
                System.arraycopy(mPdu, offset, udh, 0, userDataHeaderLength);
                mUserDataHeader = SmsHeader.fromByteArray(udh);
                offset += userDataHeaderLength;

                int headerBits = (userDataHeaderLength + 1) * 8;
                headerSeptets = headerBits / 7;
                headerSeptets += (headerBits % 7) > 0 ? 1 : 0;
                mUserDataSeptetPadding = (headerSeptets * 7) - headerBits;
            }

            int bufferLen;
            if (dataInSeptets) {
                /*
                 * Here we just create the user data length to be the remainder of
                 * the pdu minus the user data header, since userDataLength means
                 * the number of uncompressed septets.
                 */
                bufferLen = mPdu.length - offset;
            } else {
                /*
                 * userDataLength is the count of octets, so just subtract the
                 * user data header.
                 */
                bufferLen = userDataLength - (hasUserDataHeader ? (userDataHeaderLength + 1) : 0);
                if (bufferLen < 0) {
                    bufferLen = 0;
                }
            }

            mUserData = new byte[bufferLen];
            System.arraycopy(mPdu, offset, mUserData, 0, mUserData.length);
            mCur = offset;

            if (dataInSeptets) {
                // Return the number of septets
                int count = userDataLength - headerSeptets;
                // If count < 0, return 0 (means UDL was probably incorrect)
                return count < 0 ? 0 : count;
            } else {
                // Return the number of octets
                return mUserData.length;
            }
        }

        
Returns the user data payload, not including the headers
Returns:
the user data payload, not including the headers/**
         * Returns the user data payload, not including the headers
         *
         * @return the user data payload, not including the headers
         */
        byte[] getUserData() {
            return mUserData;
        }

        
Returns an object representing the user data headers
{@hide}
/**
         * Returns an object representing the user data headers
         *
         * {@hide}
         */
        SmsHeader getUserDataHeader() {
            return mUserDataHeader;
        }

        
Interprets the user data payload as packed GSM 7bit characters, and
decodes them into a String.
Params:
septetCount – the number of septets in the user data payload
Returns:
a String with the decoded characters/**
         * Interprets the user data payload as packed GSM 7bit characters, and
         * decodes them into a String.
         *
         * @param septetCount the number of septets in the user data payload
         * @return a String with the decoded characters
         */
        String getUserDataGSM7Bit(int septetCount, int languageTable,
                int languageShiftTable) {
            String ret;

            ret = GsmAlphabet.gsm7BitPackedToString(mPdu, mCur, septetCount,
                    mUserDataSeptetPadding, languageTable, languageShiftTable);

            mCur += (septetCount * 7) / 8;

            return ret;
        }

        
Interprets the user data payload as pack GSM 8-bit (a GSM alphabet string that's
stored in 8-bit unpacked format) characters, and decodes them into a String.
Params:
byteCount – the number of byest in the user data payload
Returns:
a String with the decoded characters/**
         * Interprets the user data payload as pack GSM 8-bit (a GSM alphabet string that's
         * stored in 8-bit unpacked format) characters, and decodes them into a String.
         *
         * @param byteCount the number of byest in the user data payload
         * @return a String with the decoded characters
         */
        String getUserDataGSM8bit(int byteCount) {
            String ret;

            ret = GsmAlphabet.gsm8BitUnpackedToString(mPdu, mCur, byteCount);

            mCur += byteCount;

            return ret;
        }

        
Interprets the user data payload as UCS2 characters, and
decodes them into a String.
Params:
byteCount – the number of bytes in the user data payload
Returns:
a String with the decoded characters/**
         * Interprets the user data payload as UCS2 characters, and
         * decodes them into a String.
         *
         * @param byteCount the number of bytes in the user data payload
         * @return a String with the decoded characters
         */
        String getUserDataUCS2(int byteCount) {
            String ret;

            try {
                ret = new String(mPdu, mCur, byteCount, "utf-16");
            } catch (UnsupportedEncodingException ex) {
                ret = "";
                Rlog.e(LOG_TAG, "implausible UnsupportedEncodingException", ex);
            }

            mCur += byteCount;
            return ret;
        }

        
Interprets the user data payload as KSC-5601 characters, and
decodes them into a String.
Params:
byteCount – the number of bytes in the user data payload
Returns:
a String with the decoded characters/**
         * Interprets the user data payload as KSC-5601 characters, and
         * decodes them into a String.
         *
         * @param byteCount the number of bytes in the user data payload
         * @return a String with the decoded characters
         */
        String getUserDataKSC5601(int byteCount) {
            String ret;

            try {
                ret = new String(mPdu, mCur, byteCount, "KSC5601");
            } catch (UnsupportedEncodingException ex) {
                ret = "";
                Rlog.e(LOG_TAG, "implausible UnsupportedEncodingException", ex);
            }

            mCur += byteCount;
            return ret;
        }

        boolean moreDataPresent() {
            return (mPdu.length > mCur);
        }
    }

    
Calculates the number of SMS's required to encode the message body and
the number of characters remaining until the next message.
Params:
msgBody – the message to encode
use7bitOnly – ignore (but still count) illegal characters if true
Returns:
TextEncodingDetails/**
     * Calculates the number of SMS's required to encode the message body and
     * the number of characters remaining until the next message.
     *
     * @param msgBody the message to encode
     * @param use7bitOnly ignore (but still count) illegal characters if true
     * @return TextEncodingDetails
     */
    public static TextEncodingDetails calculateLength(CharSequence msgBody,
            boolean use7bitOnly) {
        CharSequence newMsgBody = null;
        Resources r = Resources.getSystem();
        if (r.getBoolean(com.android.internal.R.bool.config_sms_force_7bit_encoding)) {
            newMsgBody  = Sms7BitEncodingTranslator.translate(msgBody);
        }
        if (TextUtils.isEmpty(newMsgBody)) {
            newMsgBody = msgBody;
        }
        TextEncodingDetails ted = GsmAlphabet.countGsmSeptets(newMsgBody, use7bitOnly);
        if (ted == null) {
            return SmsMessageBase.calcUnicodeEncodingDetails(newMsgBody);
        }
        return ted;
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public int getProtocolIdentifier() {
        return mProtocolIdentifier;
    }

    
Returns the TP-Data-Coding-Scheme byte, for acknowledgement of SMS-PP download messages.
Returns:
the TP-DCS field of the SMS header/**
     * Returns the TP-Data-Coding-Scheme byte, for acknowledgement of SMS-PP download messages.
     * @return the TP-DCS field of the SMS header
     */
    int getDataCodingScheme() {
        return mDataCodingScheme;
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public boolean isReplace() {
        return (mProtocolIdentifier & 0xc0) == 0x40
                && (mProtocolIdentifier & 0x3f) > 0
                && (mProtocolIdentifier & 0x3f) < 8;
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public boolean isCphsMwiMessage() {
        return ((GsmSmsAddress) mOriginatingAddress).isCphsVoiceMessageClear()
                || ((GsmSmsAddress) mOriginatingAddress).isCphsVoiceMessageSet();
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public boolean isMWIClearMessage() {
        if (mIsMwi && !mMwiSense) {
            return true;
        }

        return mOriginatingAddress != null
                && ((GsmSmsAddress) mOriginatingAddress).isCphsVoiceMessageClear();
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public boolean isMWISetMessage() {
        if (mIsMwi && mMwiSense) {
            return true;
        }

        return mOriginatingAddress != null
                && ((GsmSmsAddress) mOriginatingAddress).isCphsVoiceMessageSet();
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public boolean isMwiDontStore() {
        if (mIsMwi && mMwiDontStore) {
            return true;
        }

        if (isCphsMwiMessage()) {
            // See CPHS 4.2 Section B.4.2.1
            // If the user data is a single space char, do not store
            // the message. Otherwise, store and display as usual
            if (" ".equals(getMessageBody())) {
                return true;
            }
        }

        return false;
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public int getStatus() {
        return mStatus;
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public boolean isStatusReportMessage() {
        return mIsStatusReportMessage;
    }

    
{@inheritDoc} /** {@inheritDoc} */
    @Override
    public boolean isReplyPathPresent() {
        return mReplyPathPresent;
    }

    
TS 27.005 3.1, <pdu> definition "In the case of SMS: 3GPP TS 24.011 [6]
SC address followed by 3GPP TS 23.040 [3] TPDU in hexadecimal format:
ME/TA converts each octet of TP data unit into two IRA character long
hex number (e.g. octet with integer value 42 is presented to TE as two
characters 2A (IRA 50 and 65))" ...in the case of cell broadcast,
something else...
/**
     * TS 27.005 3.1, &lt;pdu&gt; definition "In the case of SMS: 3GPP TS 24.011 [6]
     * SC address followed by 3GPP TS 23.040 [3] TPDU in hexadecimal format:
     * ME/TA converts each octet of TP data unit into two IRA character long
     * hex number (e.g. octet with integer value 42 is presented to TE as two
     * characters 2A (IRA 50 and 65))" ...in the case of cell broadcast,
     * something else...
     */
    private void parsePdu(byte[] pdu) {
        mPdu = pdu;
        // Rlog.d(LOG_TAG, "raw sms message:");
        // Rlog.d(LOG_TAG, s);

        PduParser p = new PduParser(pdu);

        mScAddress = p.getSCAddress();

        if (mScAddress != null) {
            if (VDBG) Rlog.d(LOG_TAG, "SMS SC address: " + mScAddress);
        }

        // TODO(mkf) support reply path, user data header indicator

        // TP-Message-Type-Indicator
        // 9.2.3
        int firstByte = p.getByte();

        mMti = firstByte & 0x3;
        switch (mMti) {
        // TP-Message-Type-Indicator
        // 9.2.3
        case 0:
        case 3: //GSM 03.40 9.2.3.1: MTI == 3 is Reserved.
                //This should be processed in the same way as MTI == 0 (Deliver)
            parseSmsDeliver(p, firstByte);
            break;
        case 1:
            parseSmsSubmit(p, firstByte);
            break;
        case 2:
            parseSmsStatusReport(p, firstByte);
            break;
        default:
            // TODO(mkf) the rest of these
            throw new RuntimeException("Unsupported message type");
        }
    }

    
Parses a SMS-STATUS-REPORT message.
Params:
p – A PduParser, cued past the first byte.
firstByte – The first byte of the PDU, which contains MTI, etc./**
     * Parses a SMS-STATUS-REPORT message.
     *
     * @param p A PduParser, cued past the first byte.
     * @param firstByte The first byte of the PDU, which contains MTI, etc.
     */
    private void parseSmsStatusReport(PduParser p, int firstByte) {
        mIsStatusReportMessage = true;

        // TP-Message-Reference
        mMessageRef = p.getByte();
        // TP-Recipient-Address
        mRecipientAddress = p.getAddress();
        // TP-Service-Centre-Time-Stamp
        mScTimeMillis = p.getSCTimestampMillis();
        p.getSCTimestampMillis();
        // TP-Status
        mStatus = p.getByte();

        // The following are optional fields that may or may not be present.
        if (p.moreDataPresent()) {
            // TP-Parameter-Indicator
            int extraParams = p.getByte();
            int moreExtraParams = extraParams;
            while ((moreExtraParams & 0x80) != 0) {
                // We only know how to parse a few extra parameters, all
                // indicated in the first TP-PI octet, so skip over any
                // additional TP-PI octets.
                moreExtraParams = p.getByte();
            }
            // As per 3GPP 23.040 section 9.2.3.27 TP-Parameter-Indicator,
            // only process the byte if the reserved bits (bits3 to 6) are zero.
            if ((extraParams & 0x78) == 0) {
                // TP-Protocol-Identifier
                if ((extraParams & 0x01) != 0) {
                    mProtocolIdentifier = p.getByte();
                }
                // TP-Data-Coding-Scheme
                if ((extraParams & 0x02) != 0) {
                    mDataCodingScheme = p.getByte();
                }
                // TP-User-Data-Length (implies existence of TP-User-Data)
                if ((extraParams & 0x04) != 0) {
                    boolean hasUserDataHeader = (firstByte & 0x40) == 0x40;
                    parseUserData(p, hasUserDataHeader);
                }
            }
        }
    }

    private void parseSmsDeliver(PduParser p, int firstByte) {
        mReplyPathPresent = (firstByte & 0x80) == 0x80;

        mOriginatingAddress = p.getAddress();

        if (mOriginatingAddress != null) {
            if (VDBG) Rlog.v(LOG_TAG, "SMS originating address: "
                    + mOriginatingAddress.address);
        }

        // TP-Protocol-Identifier (TP-PID)
        // TS 23.040 9.2.3.9
        mProtocolIdentifier = p.getByte();

        // TP-Data-Coding-Scheme
        // see TS 23.038
        mDataCodingScheme = p.getByte();

        if (VDBG) {
            Rlog.v(LOG_TAG, "SMS TP-PID:" + mProtocolIdentifier
                    + " data coding scheme: " + mDataCodingScheme);
        }

        mScTimeMillis = p.getSCTimestampMillis();

        if (VDBG) Rlog.d(LOG_TAG, "SMS SC timestamp: " + mScTimeMillis);

        boolean hasUserDataHeader = (firstByte & 0x40) == 0x40;

        parseUserData(p, hasUserDataHeader);
    }

    
Parses a SMS-SUBMIT message.
Params:
p – A PduParser, cued past the first byte.
firstByte – The first byte of the PDU, which contains MTI, etc./**
     * Parses a SMS-SUBMIT message.
     *
     * @param p A PduParser, cued past the first byte.
     * @param firstByte The first byte of the PDU, which contains MTI, etc.
     */
    private void parseSmsSubmit(PduParser p, int firstByte) {
        mReplyPathPresent = (firstByte & 0x80) == 0x80;

        // TP-MR (TP-Message Reference)
        mMessageRef = p.getByte();

        mRecipientAddress = p.getAddress();

        if (mRecipientAddress != null) {
            if (VDBG) Rlog.v(LOG_TAG, "SMS recipient address: " + mRecipientAddress.address);
        }

        // TP-Protocol-Identifier (TP-PID)
        // TS 23.040 9.2.3.9
        mProtocolIdentifier = p.getByte();

        // TP-Data-Coding-Scheme
        // see TS 23.038
        mDataCodingScheme = p.getByte();

        if (VDBG) {
            Rlog.v(LOG_TAG, "SMS TP-PID:" + mProtocolIdentifier
                    + " data coding scheme: " + mDataCodingScheme);
        }

        // TP-Validity-Period-Format
        int validityPeriodLength = 0;
        int validityPeriodFormat = ((firstByte>>3) & 0x3);
        if (0x0 == validityPeriodFormat) /* 00, TP-VP field not present*/
        {
            validityPeriodLength = 0;
        }
        else if (0x2 == validityPeriodFormat) /* 10, TP-VP: relative format*/
        {
            validityPeriodLength = 1;
        }
        else /* other case, 11 or 01, TP-VP: absolute or enhanced format*/
        {
            validityPeriodLength = 7;
        }

        // TP-Validity-Period is not used on phone, so just ignore it for now.
        while (validityPeriodLength-- > 0)
        {
            p.getByte();
        }

        boolean hasUserDataHeader = (firstByte & 0x40) == 0x40;

        parseUserData(p, hasUserDataHeader);
    }

    
Parses the User Data of an SMS.
Params:
p – The current PduParser.
hasUserDataHeader – Indicates whether a header is present in the
                         User Data./**
     * Parses the User Data of an SMS.
     *
     * @param p The current PduParser.
     * @param hasUserDataHeader Indicates whether a header is present in the
     *                          User Data.
     */
    private void parseUserData(PduParser p, boolean hasUserDataHeader) {
        boolean hasMessageClass = false;
        boolean userDataCompressed = false;

        int encodingType = ENCODING_UNKNOWN;

        // Look up the data encoding scheme
        if ((mDataCodingScheme & 0x80) == 0) {
            userDataCompressed = (0 != (mDataCodingScheme & 0x20));
            hasMessageClass = (0 != (mDataCodingScheme & 0x10));

            if (userDataCompressed) {
                Rlog.w(LOG_TAG, "4 - Unsupported SMS data coding scheme "
                        + "(compression) " + (mDataCodingScheme & 0xff));
            } else {
                switch ((mDataCodingScheme >> 2) & 0x3) {
                case 0: // GSM 7 bit default alphabet
                    encodingType = ENCODING_7BIT;
                    break;

                case 2: // UCS 2 (16bit)
                    encodingType = ENCODING_16BIT;
                    break;

                case 1: // 8 bit data
                    //Support decoding the user data payload as pack GSM 8-bit (a GSM alphabet string
                    //that's stored in 8-bit unpacked format) characters.
                    Resources r = Resources.getSystem();
                    if (r.getBoolean(com.android.internal.
                            R.bool.config_sms_decode_gsm_8bit_data)) {
                        encodingType = ENCODING_8BIT;
                        break;
                    }

                case 3: // reserved
                    Rlog.w(LOG_TAG, "1 - Unsupported SMS data coding scheme "
                            + (mDataCodingScheme & 0xff));
                    encodingType = ENCODING_8BIT;
                    break;
                }
            }
        } else if ((mDataCodingScheme & 0xf0) == 0xf0) {
            hasMessageClass = true;
            userDataCompressed = false;

            if (0 == (mDataCodingScheme & 0x04)) {
                // GSM 7 bit default alphabet
                encodingType = ENCODING_7BIT;
            } else {
                // 8 bit data
                encodingType = ENCODING_8BIT;
            }
        } else if ((mDataCodingScheme & 0xF0) == 0xC0
                || (mDataCodingScheme & 0xF0) == 0xD0
                || (mDataCodingScheme & 0xF0) == 0xE0) {
            // 3GPP TS 23.038 V7.0.0 (2006-03) section 4

            // 0xC0 == 7 bit, don't store
            // 0xD0 == 7 bit, store
            // 0xE0 == UCS-2, store

            if ((mDataCodingScheme & 0xF0) == 0xE0) {
                encodingType = ENCODING_16BIT;
            } else {
                encodingType = ENCODING_7BIT;
            }

            userDataCompressed = false;
            boolean active = ((mDataCodingScheme & 0x08) == 0x08);
            // bit 0x04 reserved

            // VM - If TP-UDH is present, these values will be overwritten
            if ((mDataCodingScheme & 0x03) == 0x00) {
                mIsMwi = true; /* Indicates vmail */
                mMwiSense = active;/* Indicates vmail notification set/clear */
                mMwiDontStore = ((mDataCodingScheme & 0xF0) == 0xC0);

                /* Set voice mail count based on notification bit */
                if (active == true) {
                    mVoiceMailCount = -1; // unknown number of messages waiting
                } else {
                    mVoiceMailCount = 0; // no unread messages
                }

                Rlog.w(LOG_TAG, "MWI in DCS for Vmail. DCS = "
                        + (mDataCodingScheme & 0xff) + " Dont store = "
                        + mMwiDontStore + " vmail count = " + mVoiceMailCount);

            } else {
                mIsMwi = false;
                Rlog.w(LOG_TAG, "MWI in DCS for fax/email/other: "
                        + (mDataCodingScheme & 0xff));
            }
        } else if ((mDataCodingScheme & 0xC0) == 0x80) {
            // 3GPP TS 23.038 V7.0.0 (2006-03) section 4
            // 0x80..0xBF == Reserved coding groups
            if (mDataCodingScheme == 0x84) {
                // This value used for KSC5601 by carriers in Korea.
                encodingType = ENCODING_KSC5601;
            } else {
                Rlog.w(LOG_TAG, "5 - Unsupported SMS data coding scheme "
                        + (mDataCodingScheme & 0xff));
            }
        } else {
            Rlog.w(LOG_TAG, "3 - Unsupported SMS data coding scheme "
                    + (mDataCodingScheme & 0xff));
        }

        // set both the user data and the user data header.
        int count = p.constructUserData(hasUserDataHeader,
                encodingType == ENCODING_7BIT);
        this.mUserData = p.getUserData();
        this.mUserDataHeader = p.getUserDataHeader();

        /*
         * Look for voice mail indication in TP_UDH TS23.040 9.2.3.24
         * ieid = 1 (0x1) (SPECIAL_SMS_MSG_IND)
         * ieidl =2 octets
         * ieda msg_ind_type = 0x00 (voice mail; discard sms )or
         *                   = 0x80 (voice mail; store sms)
         * msg_count = 0x00 ..0xFF
         */
        if (hasUserDataHeader && (mUserDataHeader.specialSmsMsgList.size() != 0)) {
            for (SmsHeader.SpecialSmsMsg msg : mUserDataHeader.specialSmsMsgList) {
                int msgInd = msg.msgIndType & 0xff;
                /*
                 * TS 23.040 V6.8.1 Sec 9.2.3.24.2
                 * bits 1 0 : basic message indication type
                 * bits 4 3 2 : extended message indication type
                 * bits 6 5 : Profile id bit 7 storage type
                 */
                if ((msgInd == 0) || (msgInd == 0x80)) {
                    mIsMwi = true;
                    if (msgInd == 0x80) {
                        /* Store message because TP_UDH indicates so*/
                        mMwiDontStore = false;
                    } else if (mMwiDontStore == false) {
                        /* Storage bit is not set by TP_UDH
                         * Check for conflict
                         * between message storage bit in TP_UDH
                         * & DCS. The message shall be stored if either of
                         * the one indicates so.
                         * TS 23.040 V6.8.1 Sec 9.2.3.24.2
                         */
                        if (!((((mDataCodingScheme & 0xF0) == 0xD0)
                               || ((mDataCodingScheme & 0xF0) == 0xE0))
                               && ((mDataCodingScheme & 0x03) == 0x00))) {
                            /* Even DCS did not have voice mail with Storage bit
                             * 3GPP TS 23.038 V7.0.0 section 4
                             * So clear this flag*/
                            mMwiDontStore = true;
                        }
                    }

                    mVoiceMailCount = msg.msgCount & 0xff;

                    /*
                     * In the event of a conflict between message count setting
                     * and DCS then the Message Count in the TP-UDH shall
                     * override the indication in the TP-DCS. Set voice mail
                     * notification based on count in TP-UDH
                     */
                    if (mVoiceMailCount > 0)
                        mMwiSense = true;
                    else
                        mMwiSense = false;

                    Rlog.w(LOG_TAG, "MWI in TP-UDH for Vmail. Msg Ind = " + msgInd
                            + " Dont store = " + mMwiDontStore + " Vmail count = "
                            + mVoiceMailCount);

                    /*
                     * There can be only one IE for each type of message
                     * indication in TP_UDH. In the event they are duplicated
                     * last occurence will be used. Hence the for loop
                     */
                } else {
                    Rlog.w(LOG_TAG, "TP_UDH fax/email/"
                            + "extended msg/multisubscriber profile. Msg Ind = " + msgInd);
                }
            } // end of for
        } // end of if UDH

        switch (encodingType) {
        case ENCODING_UNKNOWN:
            mMessageBody = null;
            break;

        case ENCODING_8BIT:
            //Support decoding the user data payload as pack GSM 8-bit (a GSM alphabet string
            //that's stored in 8-bit unpacked format) characters.
            Resources r = Resources.getSystem();
            if (r.getBoolean(com.android.internal.
                    R.bool.config_sms_decode_gsm_8bit_data)) {
                mMessageBody = p.getUserDataGSM8bit(count);
            } else {
                mMessageBody = null;
            }
            break;

        case ENCODING_7BIT:
            mMessageBody = p.getUserDataGSM7Bit(count,
                    hasUserDataHeader ? mUserDataHeader.languageTable : 0,
                    hasUserDataHeader ? mUserDataHeader.languageShiftTable : 0);
            break;

        case ENCODING_16BIT:
            mMessageBody = p.getUserDataUCS2(count);
            break;

        case ENCODING_KSC5601:
            mMessageBody = p.getUserDataKSC5601(count);
            break;
        }

        if (VDBG) Rlog.v(LOG_TAG, "SMS message body (raw): '" + mMessageBody + "'");

        if (mMessageBody != null) {
            parseMessageBody();
        }

        if (!hasMessageClass) {
            messageClass = MessageClass.UNKNOWN;
        } else {
            switch (mDataCodingScheme & 0x3) {
            case 0:
                messageClass = MessageClass.CLASS_0;
                break;
            case 1:
                messageClass = MessageClass.CLASS_1;
                break;
            case 2:
                messageClass = MessageClass.CLASS_2;
                break;
            case 3:
                messageClass = MessageClass.CLASS_3;
                break;
            }
        }
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    @Override
    public MessageClass getMessageClass() {
        return messageClass;
    }

    
Returns true if this is a (U)SIM data download type SM.
See 3GPP TS 31.111 section 9.1 and TS 23.040 section 9.2.3.9.
Returns:
true if this is a USIM data download message; false otherwise/**
     * Returns true if this is a (U)SIM data download type SM.
     * See 3GPP TS 31.111 section 9.1 and TS 23.040 section 9.2.3.9.
     *
     * @return true if this is a USIM data download message; false otherwise
     */
    boolean isUsimDataDownload() {
        return messageClass == MessageClass.CLASS_2 &&
                (mProtocolIdentifier == 0x7f || mProtocolIdentifier == 0x7c);
    }

    public int getNumOfVoicemails() {
        /*
         * Order of priority if multiple indications are present is 1.UDH,
         *      2.DCS, 3.CPHS.
         * Voice mail count if voice mail present indication is
         * received
         *  1. UDH (or both UDH & DCS): mVoiceMailCount = 0 to 0xff. Ref[TS 23. 040]
         *  2. DCS only: count is unknown mVoiceMailCount= -1
         *  3. CPHS only: count is unknown mVoiceMailCount = 0xff. Ref[GSM-BTR-1-4700]
         * Voice mail clear, mVoiceMailCount = 0.
         */
        if ((!mIsMwi) && isCphsMwiMessage()) {
            if (mOriginatingAddress != null
                    && ((GsmSmsAddress) mOriginatingAddress).isCphsVoiceMessageSet()) {
                mVoiceMailCount = 0xff;
            } else {
                mVoiceMailCount = 0;
            }
            Rlog.v(LOG_TAG, "CPHS voice mail message");
        }
        return mVoiceMailCount;
    }
}