/* * Copyright (C) 2019 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.cellbroadcastservice; import android.util.SparseIntArray; public class UserData { /** * User data encoding types. * (See 3GPP2 C.R1001-F, v1.0, table 9.1-1) */ public static final int ENCODING_OCTET = 0x00; public static final int ENCODING_IS91_EXTENDED_PROTOCOL = 0x01; public static final int ENCODING_7BIT_ASCII = 0x02; public static final int ENCODING_IA5 = 0x03; public static final int ENCODING_UNICODE_16 = 0x04; public static final int ENCODING_SHIFT_JIS = 0x05; public static final int ENCODING_KOREAN = 0x06; public static final int ENCODING_LATIN_HEBREW = 0x07; public static final int ENCODING_LATIN = 0x08; public static final int ENCODING_GSM_7BIT_ALPHABET = 0x09; public static final int ENCODING_GSM_DCS = 0x0A; /** * User data message type encoding types. * (See 3GPP2 C.S0015-B, 4.5.2 and 3GPP 23.038, Section 4) */ public static final int ENCODING_GSM_DCS_7BIT = 0x00; public static final int ENCODING_GSM_DCS_8BIT = 0x01; public static final int ENCODING_GSM_DCS_16BIT = 0x02; /** * IS-91 message types. * (See TIA/EIS/IS-91-A-ENGL 1999, table 3.7.1.1-3) */ public static final int IS91_MSG_TYPE_VOICEMAIL_STATUS = 0x82; public static final int IS91_MSG_TYPE_SHORT_MESSAGE_FULL = 0x83; public static final int IS91_MSG_TYPE_CLI = 0x84; public static final int IS91_MSG_TYPE_SHORT_MESSAGE = 0x85; /** * US ASCII character mapping table. * * This table contains only the printable ASCII characters, with a * 0x20 offset, meaning that the ASCII SPACE character is at index * 0, with the resulting code of 0x20. * * Note this mapping is also equivalent to that used by both the * IA5 and the IS-91 encodings. For the former this is defined * using CCITT Rec. T.50 Tables 1 and 3. For the latter IS 637 B, * Table 4.3.1.4.1-1 -- and note the encoding uses only 6 bits, * and hence only maps entries up to the '_' character. * */ public static final char[] ASCII_MAP = { ' ', '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?', '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~'}; private static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}; private static final char[] HEX_LOWER_CASE_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; /** * Character to use when forced to encode otherwise unencodable * characters, meaning those not in the respective ASCII or GSM * 7-bit encoding tables. Current choice is SPACE, which is 0x20 * in both the GSM-7bit and ASCII-7bit encodings. */ static final byte UNENCODABLE_7_BIT_CHAR = 0x20; /** * Only elements between these indices in the ASCII table are printable. */ public static final int PRINTABLE_ASCII_MIN_INDEX = 0x20; public static final int ASCII_NL_INDEX = 0x0A; public static final int ASCII_CR_INDEX = 0x0D; public static final SparseIntArray charToAscii = new SparseIntArray(); static { for (int i = 0; i < ASCII_MAP.length; i++) { charToAscii.put(ASCII_MAP[i], PRINTABLE_ASCII_MIN_INDEX + i); } charToAscii.put('\n', ASCII_NL_INDEX); charToAscii.put('\r', ASCII_CR_INDEX); } public UserData() { } /** * Mapping for ASCII values less than 32 are flow control signals * and not used here. */ public static final int ASCII_MAP_BASE_INDEX = 0x20; public static final int ASCII_MAP_MAX_INDEX = ASCII_MAP_BASE_INDEX + ASCII_MAP.length - 1; /** * Contains the data header of the user data */ public SmsHeader userDataHeader; /** * Contains the data encoding type for the SMS message */ public int msgEncoding; public boolean msgEncodingSet = false; public int msgType; /** * Number of invalid bits in the last byte of data. */ public int paddingBits; public int numFields; /** * Contains the user data of a SMS message * (See 3GPP2 C.S0015-B, v2, 4.5.2) */ public byte[] payload; public String payloadStr; @Override public String toString() { StringBuilder builder = new StringBuilder(); builder.append("UserData "); builder.append("{ msgEncoding=" + (msgEncodingSet ? msgEncoding : "unset")); builder.append(", msgType=" + msgType); builder.append(", paddingBits=" + paddingBits); builder.append(", numFields=" + numFields); builder.append(", userDataHeader=" + userDataHeader); builder.append(", payload='" + toHexString(payload) + "'"); builder.append(", payloadStr='" + payloadStr + "'"); builder.append(" }"); return builder.toString(); } private static String toHexString(byte[] array) { return toHexString(array, 0, array.length, true); } private static String toHexString(byte[] array, int offset, int length, boolean upperCase) { char[] digits = upperCase ? HEX_DIGITS : HEX_LOWER_CASE_DIGITS; char[] buf = new char[length * 2]; int bufIndex = 0; for (int i = offset; i < offset + length; i++) { byte b = array[i]; buf[bufIndex++] = digits[(b >>> 4) & 0x0F]; buf[bufIndex++] = digits[b & 0x0F]; } return new String(buf); } }