1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.telephony.cdma.sms; 18 19 import android.util.SparseIntArray; 20 21 import com.android.internal.telephony.SmsHeader; 22 import com.android.internal.util.HexDump; 23 24 public class UserData { 25 26 /** 27 * User data encoding types. 28 * (See 3GPP2 C.R1001-F, v1.0, table 9.1-1) 29 */ 30 public static final int ENCODING_OCTET = 0x00; 31 public static final int ENCODING_IS91_EXTENDED_PROTOCOL = 0x01; 32 public static final int ENCODING_7BIT_ASCII = 0x02; 33 public static final int ENCODING_IA5 = 0x03; 34 public static final int ENCODING_UNICODE_16 = 0x04; 35 public static final int ENCODING_SHIFT_JIS = 0x05; 36 public static final int ENCODING_KOREAN = 0x06; 37 public static final int ENCODING_LATIN_HEBREW = 0x07; 38 public static final int ENCODING_LATIN = 0x08; 39 public static final int ENCODING_GSM_7BIT_ALPHABET = 0x09; 40 public static final int ENCODING_GSM_DCS = 0x0A; 41 42 /** 43 * IS-91 message types. 44 * (See TIA/EIS/IS-91-A-ENGL 1999, table 3.7.1.1-3) 45 */ 46 public static final int IS91_MSG_TYPE_VOICEMAIL_STATUS = 0x82; 47 public static final int IS91_MSG_TYPE_SHORT_MESSAGE_FULL = 0x83; 48 public static final int IS91_MSG_TYPE_CLI = 0x84; 49 public static final int IS91_MSG_TYPE_SHORT_MESSAGE = 0x85; 50 51 /** 52 * US ASCII character mapping table. 53 * 54 * This table contains only the printable ASCII characters, with a 55 * 0x20 offset, meaning that the ASCII SPACE character is at index 56 * 0, with the resulting code of 0x20. 57 * 58 * Note this mapping is also equivalent to that used by both the 59 * IA5 and the IS-91 encodings. For the former this is defined 60 * using CCITT Rec. T.50 Tables 1 and 3. For the latter IS 637 B, 61 * Table 4.3.1.4.1-1 -- and note the encoding uses only 6 bits, 62 * and hence only maps entries up to the '_' character. 63 * 64 */ 65 public static final char[] ASCII_MAP = { 66 ' ', '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', 67 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?', 68 '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 69 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', 70 '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 71 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~'}; 72 73 /** 74 * Character to use when forced to encode otherwise unencodable 75 * characters, meaning those not in the respective ASCII or GSM 76 * 7-bit encoding tables. Current choice is SPACE, which is 0x20 77 * in both the GSM-7bit and ASCII-7bit encodings. 78 */ 79 static final byte UNENCODABLE_7_BIT_CHAR = 0x20; 80 81 /** 82 * Only elements between these indices in the ASCII table are printable. 83 */ 84 public static final int PRINTABLE_ASCII_MIN_INDEX = 0x20; 85 public static final int ASCII_NL_INDEX = 0x0A; 86 public static final int ASCII_CR_INDEX = 0x0D; 87 public static final SparseIntArray charToAscii = new SparseIntArray(); 88 static { 89 for (int i = 0; i < ASCII_MAP.length; i++) { 90 charToAscii.put(ASCII_MAP[i], PRINTABLE_ASCII_MIN_INDEX + i); 91 } 92 charToAscii.put('\n', ASCII_NL_INDEX); 93 charToAscii.put('\r', ASCII_CR_INDEX); 94 } 95 96 /* 97 * TODO(cleanup): Move this very generic functionality somewhere 98 * more general. 99 */ 100 /** 101 * Given a string generate a corresponding ASCII-encoded byte 102 * array, but limited to printable characters. If the input 103 * contains unprintable characters, return null. 104 */ 105 public static byte[] stringToAscii(String str) { 106 int len = str.length(); 107 byte[] result = new byte[len]; 108 for (int i = 0; i < len; i++) { 109 int charCode = charToAscii.get(str.charAt(i), -1); 110 if (charCode == -1) return null; 111 result[i] = (byte)charCode; 112 } 113 return result; 114 } 115 116 /** 117 * Mapping for ASCII values less than 32 are flow control signals 118 * and not used here. 119 */ 120 public static final int ASCII_MAP_BASE_INDEX = 0x20; 121 public static final int ASCII_MAP_MAX_INDEX = ASCII_MAP_BASE_INDEX + ASCII_MAP.length - 1; 122 123 /** 124 * Contains the data header of the user data 125 */ 126 public SmsHeader userDataHeader; 127 128 /** 129 * Contains the data encoding type for the SMS message 130 */ 131 public int msgEncoding; 132 public boolean msgEncodingSet = false; 133 134 public int msgType; 135 136 /** 137 * Number of invalid bits in the last byte of data. 138 */ 139 public int paddingBits; 140 141 public int numFields; 142 143 /** 144 * Contains the user data of a SMS message 145 * (See 3GPP2 C.S0015-B, v2, 4.5.2) 146 */ 147 public byte[] payload; 148 public String payloadStr; 149 150 @Override 151 public String toString() { 152 StringBuilder builder = new StringBuilder(); 153 builder.append("UserData "); 154 builder.append("{ msgEncoding=" + (msgEncodingSet ? msgEncoding : "unset")); 155 builder.append(", msgType=" + msgType); 156 builder.append(", paddingBits=" + paddingBits); 157 builder.append(", numFields=" + numFields); 158 builder.append(", userDataHeader=" + userDataHeader); 159 builder.append(", payload='" + HexDump.toHexString(payload) + "'"); 160 builder.append(", payloadStr='" + payloadStr + "'"); 161 builder.append(" }"); 162 return builder.toString(); 163 } 164 165 } 166
