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      1 /*
      2  * Copyright (C) 2007-2008 Esmertec AG.
      3  * Copyright (C) 2007-2008 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.google.android.mms.pdu;
     19 
     20 import android.content.ContentResolver;
     21 import android.content.Context;
     22 import android.util.Log;
     23 import android.text.TextUtils;
     24 
     25 import java.io.ByteArrayOutputStream;
     26 import java.io.FileNotFoundException;
     27 import java.io.IOException;
     28 import java.io.InputStream;
     29 import java.util.Arrays;
     30 import java.util.HashMap;
     31 
     32 public class PduComposer {
     33     /**
     34      * Address type.
     35      */
     36     static private final int PDU_PHONE_NUMBER_ADDRESS_TYPE = 1;
     37     static private final int PDU_EMAIL_ADDRESS_TYPE = 2;
     38     static private final int PDU_IPV4_ADDRESS_TYPE = 3;
     39     static private final int PDU_IPV6_ADDRESS_TYPE = 4;
     40     static private final int PDU_UNKNOWN_ADDRESS_TYPE = 5;
     41 
     42     /**
     43      * Address regular expression string.
     44      */
     45     static final String REGEXP_PHONE_NUMBER_ADDRESS_TYPE = "\\+?[0-9|\\.|\\-]+";
     46     static final String REGEXP_EMAIL_ADDRESS_TYPE = "[a-zA-Z| ]*\\<{0,1}[a-zA-Z| ]+@{1}" +
     47             "[a-zA-Z| ]+\\.{1}[a-zA-Z| ]+\\>{0,1}";
     48     static final String REGEXP_IPV6_ADDRESS_TYPE =
     49         "[a-fA-F]{4}\\:{1}[a-fA-F0-9]{4}\\:{1}[a-fA-F0-9]{4}\\:{1}" +
     50         "[a-fA-F0-9]{4}\\:{1}[a-fA-F0-9]{4}\\:{1}[a-fA-F0-9]{4}\\:{1}" +
     51         "[a-fA-F0-9]{4}\\:{1}[a-fA-F0-9]{4}";
     52     static final String REGEXP_IPV4_ADDRESS_TYPE = "[0-9]{1,3}\\.{1}[0-9]{1,3}\\.{1}" +
     53             "[0-9]{1,3}\\.{1}[0-9]{1,3}";
     54 
     55     /**
     56      * The postfix strings of address.
     57      */
     58     static final String STRING_PHONE_NUMBER_ADDRESS_TYPE = "/TYPE=PLMN";
     59     static final String STRING_IPV4_ADDRESS_TYPE = "/TYPE=IPV4";
     60     static final String STRING_IPV6_ADDRESS_TYPE = "/TYPE=IPV6";
     61 
     62     /**
     63      * Error values.
     64      */
     65     static private final int PDU_COMPOSE_SUCCESS = 0;
     66     static private final int PDU_COMPOSE_CONTENT_ERROR = 1;
     67     static private final int PDU_COMPOSE_FIELD_NOT_SET = 2;
     68     static private final int PDU_COMPOSE_FIELD_NOT_SUPPORTED = 3;
     69 
     70     /**
     71      * WAP values defined in WSP spec.
     72      */
     73     static private final int QUOTED_STRING_FLAG = 34;
     74     static private final int END_STRING_FLAG = 0;
     75     static private final int LENGTH_QUOTE = 31;
     76     static private final int TEXT_MAX = 127;
     77     static private final int SHORT_INTEGER_MAX = 127;
     78     static private final int LONG_INTEGER_LENGTH_MAX = 8;
     79 
     80     /**
     81      * Block size when read data from InputStream.
     82      */
     83     static private final int PDU_COMPOSER_BLOCK_SIZE = 1024;
     84 
     85     /**
     86      * The output message.
     87      */
     88     protected ByteArrayOutputStream mMessage = null;
     89 
     90     /**
     91      * The PDU.
     92      */
     93     private GenericPdu mPdu = null;
     94 
     95     /**
     96      * Current visiting position of the mMessage.
     97      */
     98     protected int mPosition = 0;
     99 
    100     /**
    101      * Message compose buffer stack.
    102      */
    103     private BufferStack mStack = null;
    104 
    105     /**
    106      * Content resolver.
    107      */
    108     private final ContentResolver mResolver;
    109 
    110     /**
    111      * Header of this pdu.
    112      */
    113     private PduHeaders mPduHeader = null;
    114 
    115     /**
    116      * Map of all content type
    117      */
    118     private static HashMap<String, Integer> mContentTypeMap = null;
    119 
    120     static {
    121         mContentTypeMap = new HashMap<String, Integer>();
    122 
    123         int i;
    124         for (i = 0; i < PduContentTypes.contentTypes.length; i++) {
    125             mContentTypeMap.put(PduContentTypes.contentTypes[i], i);
    126         }
    127     }
    128 
    129     /**
    130      * Constructor.
    131      *
    132      * @param context the context
    133      * @param pdu the pdu to be composed
    134      */
    135     public PduComposer(Context context, GenericPdu pdu) {
    136         mPdu = pdu;
    137         mResolver = context.getContentResolver();
    138         mPduHeader = pdu.getPduHeaders();
    139         mStack = new BufferStack();
    140         mMessage = new ByteArrayOutputStream();
    141         mPosition = 0;
    142     }
    143 
    144     /**
    145      * Make the message. No need to check whether mandatory fields are set,
    146      * because the constructors of outgoing pdus are taking care of this.
    147      *
    148      * @return OutputStream of maked message. Return null if
    149      *         the PDU is invalid.
    150      */
    151     public byte[] make() {
    152         // Get Message-type.
    153         int type = mPdu.getMessageType();
    154 
    155         /* make the message */
    156         switch (type) {
    157             case PduHeaders.MESSAGE_TYPE_SEND_REQ:
    158                 if (makeSendReqPdu() != PDU_COMPOSE_SUCCESS) {
    159                     return null;
    160                 }
    161                 break;
    162             case PduHeaders.MESSAGE_TYPE_NOTIFYRESP_IND:
    163                 if (makeNotifyResp() != PDU_COMPOSE_SUCCESS) {
    164                     return null;
    165                 }
    166                 break;
    167             case PduHeaders.MESSAGE_TYPE_ACKNOWLEDGE_IND:
    168                 if (makeAckInd() != PDU_COMPOSE_SUCCESS) {
    169                     return null;
    170                 }
    171                 break;
    172             case PduHeaders.MESSAGE_TYPE_READ_REC_IND:
    173                 if (makeReadRecInd() != PDU_COMPOSE_SUCCESS) {
    174                     return null;
    175                 }
    176                 break;
    177             default:
    178                 return null;
    179         }
    180 
    181         return mMessage.toByteArray();
    182     }
    183 
    184     /**
    185      *  Copy buf to mMessage.
    186      */
    187     protected void arraycopy(byte[] buf, int pos, int length) {
    188         mMessage.write(buf, pos, length);
    189         mPosition = mPosition + length;
    190     }
    191 
    192     /**
    193      * Append a byte to mMessage.
    194      */
    195     protected void append(int value) {
    196         mMessage.write(value);
    197         mPosition ++;
    198     }
    199 
    200     /**
    201      * Append short integer value to mMessage.
    202      * This implementation doesn't check the validity of parameter, since it
    203      * assumes that the values are validated in the GenericPdu setter methods.
    204      */
    205     protected void appendShortInteger(int value) {
    206         /*
    207          * From WAP-230-WSP-20010705-a:
    208          * Short-integer = OCTET
    209          * ; Integers in range 0-127 shall be encoded as a one octet value
    210          * ; with the most significant bit set to one (1xxx xxxx) and with
    211          * ; the value in the remaining least significant bits.
    212          * In our implementation, only low 7 bits are stored and otherwise
    213          * bits are ignored.
    214          */
    215         append((value | 0x80) & 0xff);
    216     }
    217 
    218     /**
    219      * Append an octet number between 128 and 255 into mMessage.
    220      * NOTE:
    221      * A value between 0 and 127 should be appended by using appendShortInteger.
    222      * This implementation doesn't check the validity of parameter, since it
    223      * assumes that the values are validated in the GenericPdu setter methods.
    224      */
    225     protected void appendOctet(int number) {
    226         append(number);
    227     }
    228 
    229     /**
    230      * Append a short length into mMessage.
    231      * This implementation doesn't check the validity of parameter, since it
    232      * assumes that the values are validated in the GenericPdu setter methods.
    233      */
    234     protected void appendShortLength(int value) {
    235         /*
    236          * From WAP-230-WSP-20010705-a:
    237          * Short-length = <Any octet 0-30>
    238          */
    239         append(value);
    240     }
    241 
    242     /**
    243      * Append long integer into mMessage. it's used for really long integers.
    244      * This implementation doesn't check the validity of parameter, since it
    245      * assumes that the values are validated in the GenericPdu setter methods.
    246      */
    247     protected void appendLongInteger(long longInt) {
    248         /*
    249          * From WAP-230-WSP-20010705-a:
    250          * Long-integer = Short-length Multi-octet-integer
    251          * ; The Short-length indicates the length of the Multi-octet-integer
    252          * Multi-octet-integer = 1*30 OCTET
    253          * ; The content octets shall be an unsigned integer value with the
    254          * ; most significant octet encoded first (big-endian representation).
    255          * ; The minimum number of octets must be used to encode the value.
    256          */
    257         int size;
    258         long temp = longInt;
    259 
    260         // Count the length of the long integer.
    261         for(size = 0; (temp != 0) && (size < LONG_INTEGER_LENGTH_MAX); size++) {
    262             temp = (temp >>> 8);
    263         }
    264 
    265         // Set Length.
    266         appendShortLength(size);
    267 
    268         // Count and set the long integer.
    269         int i;
    270         int shift = (size -1) * 8;
    271 
    272         for (i = 0; i < size; i++) {
    273             append((int)((longInt >>> shift) & 0xff));
    274             shift = shift - 8;
    275         }
    276     }
    277 
    278     /**
    279      * Append text string into mMessage.
    280      * This implementation doesn't check the validity of parameter, since it
    281      * assumes that the values are validated in the GenericPdu setter methods.
    282      */
    283     protected void appendTextString(byte[] text) {
    284         /*
    285          * From WAP-230-WSP-20010705-a:
    286          * Text-string = [Quote] *TEXT End-of-string
    287          * ; If the first character in the TEXT is in the range of 128-255,
    288          * ; a Quote character must precede it. Otherwise the Quote character
    289          * ;must be omitted. The Quote is not part of the contents.
    290          */
    291         if (((text[0])&0xff) > TEXT_MAX) { // No need to check for <= 255
    292             append(TEXT_MAX);
    293         }
    294 
    295         arraycopy(text, 0, text.length);
    296         append(0);
    297     }
    298 
    299     /**
    300      * Append text string into mMessage.
    301      * This implementation doesn't check the validity of parameter, since it
    302      * assumes that the values are validated in the GenericPdu setter methods.
    303      */
    304     protected void appendTextString(String str) {
    305         /*
    306          * From WAP-230-WSP-20010705-a:
    307          * Text-string = [Quote] *TEXT End-of-string
    308          * ; If the first character in the TEXT is in the range of 128-255,
    309          * ; a Quote character must precede it. Otherwise the Quote character
    310          * ;must be omitted. The Quote is not part of the contents.
    311          */
    312         appendTextString(str.getBytes());
    313     }
    314 
    315     /**
    316      * Append encoded string value to mMessage.
    317      * This implementation doesn't check the validity of parameter, since it
    318      * assumes that the values are validated in the GenericPdu setter methods.
    319      */
    320     protected void appendEncodedString(EncodedStringValue enStr) {
    321         /*
    322          * From OMA-TS-MMS-ENC-V1_3-20050927-C:
    323          * Encoded-string-value = Text-string | Value-length Char-set Text-string
    324          */
    325         assert(enStr != null);
    326 
    327         int charset = enStr.getCharacterSet();
    328         byte[] textString = enStr.getTextString();
    329         if (null == textString) {
    330             return;
    331         }
    332 
    333         /*
    334          * In the implementation of EncodedStringValue, the charset field will
    335          * never be 0. It will always be composed as
    336          * Encoded-string-value = Value-length Char-set Text-string
    337          */
    338         mStack.newbuf();
    339         PositionMarker start = mStack.mark();
    340 
    341         appendShortInteger(charset);
    342         appendTextString(textString);
    343 
    344         int len = start.getLength();
    345         mStack.pop();
    346         appendValueLength(len);
    347         mStack.copy();
    348     }
    349 
    350     /**
    351      * Append uintvar integer into mMessage.
    352      * This implementation doesn't check the validity of parameter, since it
    353      * assumes that the values are validated in the GenericPdu setter methods.
    354      */
    355     protected void appendUintvarInteger(long value) {
    356         /*
    357          * From WAP-230-WSP-20010705-a:
    358          * To encode a large unsigned integer, split it into 7-bit fragments
    359          * and place them in the payloads of multiple octets. The most significant
    360          * bits are placed in the first octets with the least significant bits
    361          * ending up in the last octet. All octets MUST set the Continue bit to 1
    362          * except the last octet, which MUST set the Continue bit to 0.
    363          */
    364         int i;
    365         long max = SHORT_INTEGER_MAX;
    366 
    367         for (i = 0; i < 5; i++) {
    368             if (value < max) {
    369                 break;
    370             }
    371 
    372             max = (max << 7) | 0x7fl;
    373         }
    374 
    375         while(i > 0) {
    376             long temp = value >>> (i * 7);
    377             temp = temp & 0x7f;
    378 
    379             append((int)((temp | 0x80) & 0xff));
    380 
    381             i--;
    382         }
    383 
    384         append((int)(value & 0x7f));
    385     }
    386 
    387     /**
    388      * Append date value into mMessage.
    389      * This implementation doesn't check the validity of parameter, since it
    390      * assumes that the values are validated in the GenericPdu setter methods.
    391      */
    392     protected void appendDateValue(long date) {
    393         /*
    394          * From OMA-TS-MMS-ENC-V1_3-20050927-C:
    395          * Date-value = Long-integer
    396          */
    397         appendLongInteger(date);
    398     }
    399 
    400     /**
    401      * Append value length to mMessage.
    402      * This implementation doesn't check the validity of parameter, since it
    403      * assumes that the values are validated in the GenericPdu setter methods.
    404      */
    405     protected void appendValueLength(long value) {
    406         /*
    407          * From WAP-230-WSP-20010705-a:
    408          * Value-length = Short-length | (Length-quote Length)
    409          * ; Value length is used to indicate the length of the value to follow
    410          * Short-length = <Any octet 0-30>
    411          * Length-quote = <Octet 31>
    412          * Length = Uintvar-integer
    413          */
    414         if (value < LENGTH_QUOTE) {
    415             appendShortLength((int) value);
    416             return;
    417         }
    418 
    419         append(LENGTH_QUOTE);
    420         appendUintvarInteger(value);
    421     }
    422 
    423     /**
    424      * Append quoted string to mMessage.
    425      * This implementation doesn't check the validity of parameter, since it
    426      * assumes that the values are validated in the GenericPdu setter methods.
    427      */
    428     protected void appendQuotedString(byte[] text) {
    429         /*
    430          * From WAP-230-WSP-20010705-a:
    431          * Quoted-string = <Octet 34> *TEXT End-of-string
    432          * ;The TEXT encodes an RFC2616 Quoted-string with the enclosing
    433          * ;quotation-marks <"> removed.
    434          */
    435         append(QUOTED_STRING_FLAG);
    436         arraycopy(text, 0, text.length);
    437         append(END_STRING_FLAG);
    438     }
    439 
    440     /**
    441      * Append quoted string to mMessage.
    442      * This implementation doesn't check the validity of parameter, since it
    443      * assumes that the values are validated in the GenericPdu setter methods.
    444      */
    445     protected void appendQuotedString(String str) {
    446         /*
    447          * From WAP-230-WSP-20010705-a:
    448          * Quoted-string = <Octet 34> *TEXT End-of-string
    449          * ;The TEXT encodes an RFC2616 Quoted-string with the enclosing
    450          * ;quotation-marks <"> removed.
    451          */
    452         appendQuotedString(str.getBytes());
    453     }
    454 
    455     private EncodedStringValue appendAddressType(EncodedStringValue address) {
    456         EncodedStringValue temp = null;
    457 
    458         try {
    459             int addressType = checkAddressType(address.getString());
    460             temp = EncodedStringValue.copy(address);
    461             if (PDU_PHONE_NUMBER_ADDRESS_TYPE == addressType) {
    462                 // Phone number.
    463                 temp.appendTextString(STRING_PHONE_NUMBER_ADDRESS_TYPE.getBytes());
    464             } else if (PDU_IPV4_ADDRESS_TYPE == addressType) {
    465                 // Ipv4 address.
    466                 temp.appendTextString(STRING_IPV4_ADDRESS_TYPE.getBytes());
    467             } else if (PDU_IPV6_ADDRESS_TYPE == addressType) {
    468                 // Ipv6 address.
    469                 temp.appendTextString(STRING_IPV6_ADDRESS_TYPE.getBytes());
    470             }
    471         } catch (NullPointerException e) {
    472             return null;
    473         }
    474 
    475         return temp;
    476     }
    477 
    478     /**
    479      * Append header to mMessage.
    480      */
    481     private int appendHeader(int field) {
    482         switch (field) {
    483             case PduHeaders.MMS_VERSION:
    484                 appendOctet(field);
    485 
    486                 int version = mPduHeader.getOctet(field);
    487                 if (0 == version) {
    488                     appendShortInteger(PduHeaders.CURRENT_MMS_VERSION);
    489                 } else {
    490                     appendShortInteger(version);
    491                 }
    492 
    493                 break;
    494 
    495             case PduHeaders.MESSAGE_ID:
    496             case PduHeaders.TRANSACTION_ID:
    497                 byte[] textString = mPduHeader.getTextString(field);
    498                 if (null == textString) {
    499                     return PDU_COMPOSE_FIELD_NOT_SET;
    500                 }
    501 
    502                 appendOctet(field);
    503                 appendTextString(textString);
    504                 break;
    505 
    506             case PduHeaders.TO:
    507             case PduHeaders.BCC:
    508             case PduHeaders.CC:
    509                 EncodedStringValue[] addr = mPduHeader.getEncodedStringValues(field);
    510 
    511                 if (null == addr) {
    512                     return PDU_COMPOSE_FIELD_NOT_SET;
    513                 }
    514 
    515                 EncodedStringValue temp;
    516                 for (int i = 0; i < addr.length; i++) {
    517                     temp = appendAddressType(addr[i]);
    518                     if (temp == null) {
    519                         return PDU_COMPOSE_CONTENT_ERROR;
    520                     }
    521 
    522                     appendOctet(field);
    523                     appendEncodedString(temp);
    524                 }
    525                 break;
    526 
    527             case PduHeaders.FROM:
    528                 // Value-length (Address-present-token Encoded-string-value | Insert-address-token)
    529                 appendOctet(field);
    530 
    531                 EncodedStringValue from = mPduHeader.getEncodedStringValue(field);
    532                 if ((from == null)
    533                         || TextUtils.isEmpty(from.getString())
    534                         || new String(from.getTextString()).equals(
    535                                 PduHeaders.FROM_INSERT_ADDRESS_TOKEN_STR)) {
    536                     // Length of from = 1
    537                     append(1);
    538                     // Insert-address-token = <Octet 129>
    539                     append(PduHeaders.FROM_INSERT_ADDRESS_TOKEN);
    540                 } else {
    541                     mStack.newbuf();
    542                     PositionMarker fstart = mStack.mark();
    543 
    544                     // Address-present-token = <Octet 128>
    545                     append(PduHeaders.FROM_ADDRESS_PRESENT_TOKEN);
    546 
    547                     temp = appendAddressType(from);
    548                     if (temp == null) {
    549                         return PDU_COMPOSE_CONTENT_ERROR;
    550                     }
    551 
    552                     appendEncodedString(temp);
    553 
    554                     int flen = fstart.getLength();
    555                     mStack.pop();
    556                     appendValueLength(flen);
    557                     mStack.copy();
    558                 }
    559                 break;
    560 
    561             case PduHeaders.READ_STATUS:
    562             case PduHeaders.STATUS:
    563             case PduHeaders.REPORT_ALLOWED:
    564             case PduHeaders.PRIORITY:
    565             case PduHeaders.DELIVERY_REPORT:
    566             case PduHeaders.READ_REPORT:
    567                 int octet = mPduHeader.getOctet(field);
    568                 if (0 == octet) {
    569                     return PDU_COMPOSE_FIELD_NOT_SET;
    570                 }
    571 
    572                 appendOctet(field);
    573                 appendOctet(octet);
    574                 break;
    575 
    576             case PduHeaders.DATE:
    577                 long date = mPduHeader.getLongInteger(field);
    578                 if (-1 == date) {
    579                     return PDU_COMPOSE_FIELD_NOT_SET;
    580                 }
    581 
    582                 appendOctet(field);
    583                 appendDateValue(date);
    584                 break;
    585 
    586             case PduHeaders.SUBJECT:
    587                 EncodedStringValue enString =
    588                     mPduHeader.getEncodedStringValue(field);
    589                 if (null == enString) {
    590                     return PDU_COMPOSE_FIELD_NOT_SET;
    591                 }
    592 
    593                 appendOctet(field);
    594                 appendEncodedString(enString);
    595                 break;
    596 
    597             case PduHeaders.MESSAGE_CLASS:
    598                 byte[] messageClass = mPduHeader.getTextString(field);
    599                 if (null == messageClass) {
    600                     return PDU_COMPOSE_FIELD_NOT_SET;
    601                 }
    602 
    603                 appendOctet(field);
    604                 if (Arrays.equals(messageClass,
    605                         PduHeaders.MESSAGE_CLASS_ADVERTISEMENT_STR.getBytes())) {
    606                     appendOctet(PduHeaders.MESSAGE_CLASS_ADVERTISEMENT);
    607                 } else if (Arrays.equals(messageClass,
    608                         PduHeaders.MESSAGE_CLASS_AUTO_STR.getBytes())) {
    609                     appendOctet(PduHeaders.MESSAGE_CLASS_AUTO);
    610                 } else if (Arrays.equals(messageClass,
    611                         PduHeaders.MESSAGE_CLASS_PERSONAL_STR.getBytes())) {
    612                     appendOctet(PduHeaders.MESSAGE_CLASS_PERSONAL);
    613                 } else if (Arrays.equals(messageClass,
    614                         PduHeaders.MESSAGE_CLASS_INFORMATIONAL_STR.getBytes())) {
    615                     appendOctet(PduHeaders.MESSAGE_CLASS_INFORMATIONAL);
    616                 } else {
    617                     appendTextString(messageClass);
    618                 }
    619                 break;
    620 
    621             case PduHeaders.EXPIRY:
    622                 long expiry = mPduHeader.getLongInteger(field);
    623                 if (-1 == expiry) {
    624                     return PDU_COMPOSE_FIELD_NOT_SET;
    625                 }
    626 
    627                 appendOctet(field);
    628 
    629                 mStack.newbuf();
    630                 PositionMarker expiryStart = mStack.mark();
    631 
    632                 append(PduHeaders.VALUE_RELATIVE_TOKEN);
    633                 appendLongInteger(expiry);
    634 
    635                 int expiryLength = expiryStart.getLength();
    636                 mStack.pop();
    637                 appendValueLength(expiryLength);
    638                 mStack.copy();
    639                 break;
    640 
    641             default:
    642                 return PDU_COMPOSE_FIELD_NOT_SUPPORTED;
    643         }
    644 
    645         return PDU_COMPOSE_SUCCESS;
    646     }
    647 
    648     /**
    649      * Make ReadRec.Ind.
    650      */
    651     private int makeReadRecInd() {
    652         if (mMessage == null) {
    653             mMessage = new ByteArrayOutputStream();
    654             mPosition = 0;
    655         }
    656 
    657         // X-Mms-Message-Type
    658         appendOctet(PduHeaders.MESSAGE_TYPE);
    659         appendOctet(PduHeaders.MESSAGE_TYPE_READ_REC_IND);
    660 
    661         // X-Mms-MMS-Version
    662         if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
    663             return PDU_COMPOSE_CONTENT_ERROR;
    664         }
    665 
    666         // Message-ID
    667         if (appendHeader(PduHeaders.MESSAGE_ID) != PDU_COMPOSE_SUCCESS) {
    668             return PDU_COMPOSE_CONTENT_ERROR;
    669         }
    670 
    671         // To
    672         if (appendHeader(PduHeaders.TO) != PDU_COMPOSE_SUCCESS) {
    673             return PDU_COMPOSE_CONTENT_ERROR;
    674         }
    675 
    676         // From
    677         if (appendHeader(PduHeaders.FROM) != PDU_COMPOSE_SUCCESS) {
    678             return PDU_COMPOSE_CONTENT_ERROR;
    679         }
    680 
    681         // Date Optional
    682         appendHeader(PduHeaders.DATE);
    683 
    684         // X-Mms-Read-Status
    685         if (appendHeader(PduHeaders.READ_STATUS) != PDU_COMPOSE_SUCCESS) {
    686             return PDU_COMPOSE_CONTENT_ERROR;
    687         }
    688 
    689         // X-Mms-Applic-ID Optional(not support)
    690         // X-Mms-Reply-Applic-ID Optional(not support)
    691         // X-Mms-Aux-Applic-Info Optional(not support)
    692 
    693         return PDU_COMPOSE_SUCCESS;
    694     }
    695 
    696     /**
    697      * Make NotifyResp.Ind.
    698      */
    699     private int makeNotifyResp() {
    700         if (mMessage == null) {
    701             mMessage = new ByteArrayOutputStream();
    702             mPosition = 0;
    703         }
    704 
    705         //    X-Mms-Message-Type
    706         appendOctet(PduHeaders.MESSAGE_TYPE);
    707         appendOctet(PduHeaders.MESSAGE_TYPE_NOTIFYRESP_IND);
    708 
    709         // X-Mms-Transaction-ID
    710         if (appendHeader(PduHeaders.TRANSACTION_ID) != PDU_COMPOSE_SUCCESS) {
    711             return PDU_COMPOSE_CONTENT_ERROR;
    712         }
    713 
    714         // X-Mms-MMS-Version
    715         if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
    716             return PDU_COMPOSE_CONTENT_ERROR;
    717         }
    718 
    719         //  X-Mms-Status
    720         if (appendHeader(PduHeaders.STATUS) != PDU_COMPOSE_SUCCESS) {
    721             return PDU_COMPOSE_CONTENT_ERROR;
    722         }
    723 
    724         // X-Mms-Report-Allowed Optional (not support)
    725         return PDU_COMPOSE_SUCCESS;
    726     }
    727 
    728     /**
    729      * Make Acknowledge.Ind.
    730      */
    731     private int makeAckInd() {
    732         if (mMessage == null) {
    733             mMessage = new ByteArrayOutputStream();
    734             mPosition = 0;
    735         }
    736 
    737         //    X-Mms-Message-Type
    738         appendOctet(PduHeaders.MESSAGE_TYPE);
    739         appendOctet(PduHeaders.MESSAGE_TYPE_ACKNOWLEDGE_IND);
    740 
    741         // X-Mms-Transaction-ID
    742         if (appendHeader(PduHeaders.TRANSACTION_ID) != PDU_COMPOSE_SUCCESS) {
    743             return PDU_COMPOSE_CONTENT_ERROR;
    744         }
    745 
    746         //     X-Mms-MMS-Version
    747         if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
    748             return PDU_COMPOSE_CONTENT_ERROR;
    749         }
    750 
    751         // X-Mms-Report-Allowed Optional
    752         appendHeader(PduHeaders.REPORT_ALLOWED);
    753 
    754         return PDU_COMPOSE_SUCCESS;
    755     }
    756 
    757     /**
    758      * Make Send.req.
    759      */
    760     private int makeSendReqPdu() {
    761         if (mMessage == null) {
    762             mMessage = new ByteArrayOutputStream();
    763             mPosition = 0;
    764         }
    765 
    766         // X-Mms-Message-Type
    767         appendOctet(PduHeaders.MESSAGE_TYPE);
    768         appendOctet(PduHeaders.MESSAGE_TYPE_SEND_REQ);
    769 
    770         // X-Mms-Transaction-ID
    771         appendOctet(PduHeaders.TRANSACTION_ID);
    772 
    773         byte[] trid = mPduHeader.getTextString(PduHeaders.TRANSACTION_ID);
    774         if (trid == null) {
    775             // Transaction-ID should be set(by Transaction) before make().
    776             throw new IllegalArgumentException("Transaction-ID is null.");
    777         }
    778         appendTextString(trid);
    779 
    780         //  X-Mms-MMS-Version
    781         if (appendHeader(PduHeaders.MMS_VERSION) != PDU_COMPOSE_SUCCESS) {
    782             return PDU_COMPOSE_CONTENT_ERROR;
    783         }
    784 
    785         // Date Date-value Optional.
    786         appendHeader(PduHeaders.DATE);
    787 
    788         // From
    789         if (appendHeader(PduHeaders.FROM) != PDU_COMPOSE_SUCCESS) {
    790             return PDU_COMPOSE_CONTENT_ERROR;
    791         }
    792 
    793         boolean recipient = false;
    794 
    795         // To
    796         if (appendHeader(PduHeaders.TO) != PDU_COMPOSE_CONTENT_ERROR) {
    797             recipient = true;
    798         }
    799 
    800         // Cc
    801         if (appendHeader(PduHeaders.CC) != PDU_COMPOSE_CONTENT_ERROR) {
    802             recipient = true;
    803         }
    804 
    805         // Bcc
    806         if (appendHeader(PduHeaders.BCC) != PDU_COMPOSE_CONTENT_ERROR) {
    807             recipient = true;
    808         }
    809 
    810         // Need at least one of "cc", "bcc" and "to".
    811         if (false == recipient) {
    812             return PDU_COMPOSE_CONTENT_ERROR;
    813         }
    814 
    815         // Subject Optional
    816         appendHeader(PduHeaders.SUBJECT);
    817 
    818         // X-Mms-Message-Class Optional
    819         // Message-class-value = Class-identifier | Token-text
    820         appendHeader(PduHeaders.MESSAGE_CLASS);
    821 
    822         // X-Mms-Expiry Optional
    823         appendHeader(PduHeaders.EXPIRY);
    824 
    825         // X-Mms-Priority Optional
    826         appendHeader(PduHeaders.PRIORITY);
    827 
    828         // X-Mms-Delivery-Report Optional
    829         appendHeader(PduHeaders.DELIVERY_REPORT);
    830 
    831         // X-Mms-Read-Report Optional
    832         appendHeader(PduHeaders.READ_REPORT);
    833 
    834         //    Content-Type
    835         appendOctet(PduHeaders.CONTENT_TYPE);
    836 
    837         //  Message body
    838         return makeMessageBody();
    839     }
    840 
    841     /**
    842      * Make message body.
    843      */
    844     private int makeMessageBody() {
    845         // 1. add body informations
    846         mStack.newbuf();  // Switching buffer because we need to
    847 
    848         PositionMarker ctStart = mStack.mark();
    849 
    850         // This contentTypeIdentifier should be used for type of attachment...
    851         String contentType = new String(mPduHeader.getTextString(PduHeaders.CONTENT_TYPE));
    852         Integer contentTypeIdentifier = mContentTypeMap.get(contentType);
    853         if (contentTypeIdentifier == null) {
    854             // content type is mandatory
    855             return PDU_COMPOSE_CONTENT_ERROR;
    856         }
    857 
    858         appendShortInteger(contentTypeIdentifier.intValue());
    859 
    860         // content-type parameter: start
    861         PduBody body = ((SendReq) mPdu).getBody();
    862         if (null == body || body.getPartsNum() == 0) {
    863             // empty message
    864             appendUintvarInteger(0);
    865             mStack.pop();
    866             mStack.copy();
    867             return PDU_COMPOSE_SUCCESS;
    868         }
    869 
    870         PduPart part;
    871         try {
    872             part = body.getPart(0);
    873 
    874             byte[] start = part.getContentId();
    875             if (start != null) {
    876                 appendOctet(PduPart.P_DEP_START);
    877                 if (('<' == start[0]) && ('>' == start[start.length - 1])) {
    878                     appendTextString(start);
    879                 } else {
    880                     appendTextString("<" + new String(start) + ">");
    881                 }
    882             }
    883 
    884             // content-type parameter: type
    885             appendOctet(PduPart.P_CT_MR_TYPE);
    886             appendTextString(part.getContentType());
    887         }
    888         catch (ArrayIndexOutOfBoundsException e){
    889             e.printStackTrace();
    890         }
    891 
    892         int ctLength = ctStart.getLength();
    893         mStack.pop();
    894         appendValueLength(ctLength);
    895         mStack.copy();
    896 
    897         // 3. add content
    898         int partNum = body.getPartsNum();
    899         appendUintvarInteger(partNum);
    900         for (int i = 0; i < partNum; i++) {
    901             part = body.getPart(i);
    902             mStack.newbuf();  // Leaving space for header lengh and data length
    903             PositionMarker attachment = mStack.mark();
    904 
    905             mStack.newbuf();  // Leaving space for Content-Type length
    906             PositionMarker contentTypeBegin = mStack.mark();
    907 
    908             byte[] partContentType = part.getContentType();
    909 
    910             if (partContentType == null) {
    911                 // content type is mandatory
    912                 return PDU_COMPOSE_CONTENT_ERROR;
    913             }
    914 
    915             // content-type value
    916             Integer partContentTypeIdentifier =
    917                 mContentTypeMap.get(new String(partContentType));
    918             if (partContentTypeIdentifier == null) {
    919                 appendTextString(partContentType);
    920             } else {
    921                 appendShortInteger(partContentTypeIdentifier.intValue());
    922             }
    923 
    924             /* Content-type parameter : name.
    925              * The value of name, filename, content-location is the same.
    926              * Just one of them is enough for this PDU.
    927              */
    928             byte[] name = part.getName();
    929 
    930             if (null == name) {
    931                 name = part.getFilename();
    932 
    933                 if (null == name) {
    934                     name = part.getContentLocation();
    935 
    936                     if (null == name) {
    937                         /* at lease one of name, filename, Content-location
    938                          * should be available.
    939                          */
    940                         return PDU_COMPOSE_CONTENT_ERROR;
    941                     }
    942                 }
    943             }
    944             appendOctet(PduPart.P_DEP_NAME);
    945             appendTextString(name);
    946 
    947             // content-type parameter : charset
    948             int charset = part.getCharset();
    949             if (charset != 0) {
    950                 appendOctet(PduPart.P_CHARSET);
    951                 appendShortInteger(charset);
    952             }
    953 
    954             int contentTypeLength = contentTypeBegin.getLength();
    955             mStack.pop();
    956             appendValueLength(contentTypeLength);
    957             mStack.copy();
    958 
    959             // content id
    960             byte[] contentId = part.getContentId();
    961 
    962             if (null != contentId) {
    963                 appendOctet(PduPart.P_CONTENT_ID);
    964                 if (('<' == contentId[0]) && ('>' == contentId[contentId.length - 1])) {
    965                     appendQuotedString(contentId);
    966                 } else {
    967                     appendQuotedString("<" + new String(contentId) + ">");
    968                 }
    969             }
    970 
    971             // content-location
    972             byte[] contentLocation = part.getContentLocation();
    973             if (null != contentLocation) {
    974             	appendOctet(PduPart.P_CONTENT_LOCATION);
    975             	appendTextString(contentLocation);
    976             }
    977 
    978             // content
    979             int headerLength = attachment.getLength();
    980 
    981             int dataLength = 0; // Just for safety...
    982             byte[] partData = part.getData();
    983 
    984             if (partData != null) {
    985                 arraycopy(partData, 0, partData.length);
    986                 dataLength = partData.length;
    987             } else {
    988                 InputStream cr = null;
    989                 try {
    990                     byte[] buffer = new byte[PDU_COMPOSER_BLOCK_SIZE];
    991                     cr = mResolver.openInputStream(part.getDataUri());
    992                     int len = 0;
    993                     while ((len = cr.read(buffer)) != -1) {
    994                         mMessage.write(buffer, 0, len);
    995                         mPosition += len;
    996                         dataLength += len;
    997                     }
    998                 } catch (FileNotFoundException e) {
    999                     return PDU_COMPOSE_CONTENT_ERROR;
   1000                 } catch (IOException e) {
   1001                     return PDU_COMPOSE_CONTENT_ERROR;
   1002                 } catch (RuntimeException e) {
   1003                     return PDU_COMPOSE_CONTENT_ERROR;
   1004                 } finally {
   1005                     if (cr != null) {
   1006                         try {
   1007                             cr.close();
   1008                         } catch (IOException e) {
   1009                         }
   1010                     }
   1011                 }
   1012             }
   1013 
   1014             if (dataLength != (attachment.getLength() - headerLength)) {
   1015                 throw new RuntimeException("BUG: Length sanity check failed");
   1016             }
   1017 
   1018             mStack.pop();
   1019             appendUintvarInteger(headerLength);
   1020             appendUintvarInteger(dataLength);
   1021             mStack.copy();
   1022         }
   1023 
   1024         return PDU_COMPOSE_SUCCESS;
   1025     }
   1026 
   1027     /**
   1028      *  Record current message informations.
   1029      */
   1030     static private class LengthRecordNode {
   1031         ByteArrayOutputStream currentMessage = null;
   1032         public int currentPosition = 0;
   1033 
   1034         public LengthRecordNode next = null;
   1035     }
   1036 
   1037     /**
   1038      * Mark current message position and stact size.
   1039      */
   1040     private class PositionMarker {
   1041         private int c_pos;   // Current position
   1042         private int currentStackSize;  // Current stack size
   1043 
   1044         int getLength() {
   1045             // If these assert fails, likely that you are finding the
   1046             // size of buffer that is deep in BufferStack you can only
   1047             // find the length of the buffer that is on top
   1048             if (currentStackSize != mStack.stackSize) {
   1049                 throw new RuntimeException("BUG: Invalid call to getLength()");
   1050             }
   1051 
   1052             return mPosition - c_pos;
   1053         }
   1054     }
   1055 
   1056     /**
   1057      * This implementation can be OPTIMIZED to use only
   1058      * 2 buffers. This optimization involves changing BufferStack
   1059      * only... Its usage (interface) will not change.
   1060      */
   1061     private class BufferStack {
   1062         private LengthRecordNode stack = null;
   1063         private LengthRecordNode toCopy = null;
   1064 
   1065         int stackSize = 0;
   1066 
   1067         /**
   1068          *  Create a new message buffer and push it into the stack.
   1069          */
   1070         void newbuf() {
   1071             // You can't create a new buff when toCopy != null
   1072             // That is after calling pop() and before calling copy()
   1073             // If you do, it is a bug
   1074             if (toCopy != null) {
   1075                 throw new RuntimeException("BUG: Invalid newbuf() before copy()");
   1076             }
   1077 
   1078             LengthRecordNode temp = new LengthRecordNode();
   1079 
   1080             temp.currentMessage = mMessage;
   1081             temp.currentPosition = mPosition;
   1082 
   1083             temp.next = stack;
   1084             stack = temp;
   1085 
   1086             stackSize = stackSize + 1;
   1087 
   1088             mMessage = new ByteArrayOutputStream();
   1089             mPosition = 0;
   1090         }
   1091 
   1092         /**
   1093          *  Pop the message before and record current message in the stack.
   1094          */
   1095         void pop() {
   1096             ByteArrayOutputStream currentMessage = mMessage;
   1097             int currentPosition = mPosition;
   1098 
   1099             mMessage = stack.currentMessage;
   1100             mPosition = stack.currentPosition;
   1101 
   1102             toCopy = stack;
   1103             // Re using the top element of the stack to avoid memory allocation
   1104 
   1105             stack = stack.next;
   1106             stackSize = stackSize - 1;
   1107 
   1108             toCopy.currentMessage = currentMessage;
   1109             toCopy.currentPosition = currentPosition;
   1110         }
   1111 
   1112         /**
   1113          *  Append current message to the message before.
   1114          */
   1115         void copy() {
   1116             arraycopy(toCopy.currentMessage.toByteArray(), 0,
   1117                     toCopy.currentPosition);
   1118 
   1119             toCopy = null;
   1120         }
   1121 
   1122         /**
   1123          *  Mark current message position
   1124          */
   1125         PositionMarker mark() {
   1126             PositionMarker m = new PositionMarker();
   1127 
   1128             m.c_pos = mPosition;
   1129             m.currentStackSize = stackSize;
   1130 
   1131             return m;
   1132         }
   1133     }
   1134 
   1135     /**
   1136      * Check address type.
   1137      *
   1138      * @param address address string without the postfix stinng type,
   1139      *        such as "/TYPE=PLMN", "/TYPE=IPv6" and "/TYPE=IPv4"
   1140      * @return PDU_PHONE_NUMBER_ADDRESS_TYPE if it is phone number,
   1141      *         PDU_EMAIL_ADDRESS_TYPE if it is email address,
   1142      *         PDU_IPV4_ADDRESS_TYPE if it is ipv4 address,
   1143      *         PDU_IPV6_ADDRESS_TYPE if it is ipv6 address,
   1144      *         PDU_UNKNOWN_ADDRESS_TYPE if it is unknown.
   1145      */
   1146     protected static int checkAddressType(String address) {
   1147         /**
   1148          * From OMA-TS-MMS-ENC-V1_3-20050927-C.pdf, section 8.
   1149          * address = ( e-mail / device-address / alphanum-shortcode / num-shortcode)
   1150          * e-mail = mailbox; to the definition of mailbox as described in
   1151          * section 3.4 of [RFC2822], but excluding the
   1152          * obsolete definitions as indicated by the "obs-" prefix.
   1153          * device-address = ( global-phone-number "/TYPE=PLMN" )
   1154          * / ( ipv4 "/TYPE=IPv4" ) / ( ipv6 "/TYPE=IPv6" )
   1155          * / ( escaped-value "/TYPE=" address-type )
   1156          *
   1157          * global-phone-number = ["+"] 1*( DIGIT / written-sep )
   1158          * written-sep =("-"/".")
   1159          *
   1160          * ipv4 = 1*3DIGIT 3( "." 1*3DIGIT ) ; IPv4 address value
   1161          *
   1162          * ipv6 = 4HEXDIG 7( ":" 4HEXDIG ) ; IPv6 address per RFC 2373
   1163          */
   1164 
   1165         if (null == address) {
   1166             return PDU_UNKNOWN_ADDRESS_TYPE;
   1167         }
   1168 
   1169         if (address.matches(REGEXP_IPV4_ADDRESS_TYPE)) {
   1170             // Ipv4 address.
   1171             return PDU_IPV4_ADDRESS_TYPE;
   1172         }else if (address.matches(REGEXP_PHONE_NUMBER_ADDRESS_TYPE)) {
   1173             // Phone number.
   1174             return PDU_PHONE_NUMBER_ADDRESS_TYPE;
   1175         } else if (address.matches(REGEXP_EMAIL_ADDRESS_TYPE)) {
   1176             // Email address.
   1177             return PDU_EMAIL_ADDRESS_TYPE;
   1178         } else if (address.matches(REGEXP_IPV6_ADDRESS_TYPE)) {
   1179             // Ipv6 address.
   1180             return PDU_IPV6_ADDRESS_TYPE;
   1181         } else {
   1182             // Unknown address.
   1183             return PDU_UNKNOWN_ADDRESS_TYPE;
   1184         }
   1185     }
   1186 }
   1187