336 lines
11 KiB
Java
336 lines
11 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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* Copyright (C) 2024-2025 The LineageOS Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.support.v7.mms;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteException;
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import android.net.Uri;
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import android.provider.Telephony;
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import android.text.TextUtils;
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import android.util.Log;
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import android.util.SparseArray;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Default implementation of APN settings loader
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*/
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class DefaultApnSettingsLoader implements ApnSettingsLoader {
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/**
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* The base implementation of an APN
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*/
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private static class BaseApn implements Apn {
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/**
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* Create a base APN from parameters
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*
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* @param typesIn the APN type field
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* @param mmscIn the APN mmsc field
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* @param proxyIn the APN mmsproxy field
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* @param portIn the APN mmsport field
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* @return an instance of base APN, or null if any of the parameter is invalid
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*/
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public static BaseApn from(final String typesIn, final String mmscIn, final String proxyIn,
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final String portIn) {
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if (!isValidApnType(trimWithNullCheck(typesIn), APN_TYPE_MMS)) {
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return null;
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}
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String mmsc = trimWithNullCheck(mmscIn);
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if (TextUtils.isEmpty(mmsc)) {
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return null;
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}
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mmsc = trimV4AddrZeros(mmsc);
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try {
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new URI(mmsc);
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} catch (final URISyntaxException e) {
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return null;
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}
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String mmsProxy = trimWithNullCheck(proxyIn);
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int mmsProxyPort = 80;
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if (!TextUtils.isEmpty(mmsProxy)) {
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mmsProxy = trimV4AddrZeros(mmsProxy);
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final String portString = trimWithNullCheck(portIn);
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if (portString != null) {
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try {
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mmsProxyPort = Integer.parseInt(portString);
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} catch (final NumberFormatException e) {
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// Ignore, just use 80 to try
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}
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}
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}
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return new BaseApn(mmsc, mmsProxy, mmsProxyPort);
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}
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private final String mMmsc;
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private final String mMmsProxy;
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private final int mMmsProxyPort;
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public BaseApn(final String mmsc, final String proxy, final int port) {
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mMmsc = mmsc;
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mMmsProxy = proxy;
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mMmsProxyPort = port;
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}
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@Override
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public String getMmsc() {
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return mMmsc;
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}
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@Override
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public String getMmsProxy() {
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return mMmsProxy;
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}
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@Override
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public int getMmsProxyPort() {
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return mMmsProxyPort;
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}
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@Override
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public void setSuccess() {
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// Do nothing
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}
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}
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/**
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* APN_TYPE_ALL is a special type to indicate that this APN entry can
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* service all data connections.
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*/
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public static final String APN_TYPE_ALL = "*";
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/** APN type for MMS traffic */
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public static final String APN_TYPE_MMS = "mms";
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private static final String[] APN_PROJECTION = {
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Telephony.Carriers.TYPE,
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Telephony.Carriers.MMSC,
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Telephony.Carriers.MMSPROXY,
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Telephony.Carriers.MMSPORT,
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};
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private static final int COLUMN_TYPE = 0;
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private static final int COLUMN_MMSC = 1;
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private static final int COLUMN_MMSPROXY = 2;
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private static final int COLUMN_MMSPORT = 3;
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private final Context mContext;
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// Cached APNs for subIds
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private final SparseArray<List<Apn>> mApnsCache;
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DefaultApnSettingsLoader(final Context context) {
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mContext = context;
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mApnsCache = new SparseArray<>();
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}
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@Override
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public List<Apn> get(final String apnName) {
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final int subId = Utils.getEffectiveSubscriptionId(MmsManager.DEFAULT_SUB_ID);
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List<Apn> apns;
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boolean didLoad = false;
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synchronized (this) {
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apns = mApnsCache.get(subId);
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if (apns == null) {
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apns = new ArrayList<>();
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mApnsCache.put(subId, apns);
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loadLocked(subId, apnName, apns);
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didLoad = true;
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}
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}
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if (didLoad) {
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Log.i(MmsService.TAG, "Loaded " + apns.size() + " APNs");
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}
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return apns;
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}
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private void loadLocked(final int subId, final String apnName, final List<Apn> apns) {
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// Try system APN table first
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loadFromSystem(subId, apnName, apns);
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}
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/**
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* Load matching APNs from telephony provider.
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* We try different combinations of the query to work around some platform quirks.
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*
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* @param subId the SIM subId
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* @param apnName the APN name to match
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* @param apns the list used to return results
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*/
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private void loadFromSystem(final int subId, final String apnName, final List<Apn> apns) {
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Uri uri;
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if (subId != MmsManager.DEFAULT_SUB_ID) {
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uri = Uri.withAppendedPath(Telephony.Carriers.CONTENT_URI, "/subId/" + subId);
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} else {
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uri = Telephony.Carriers.CONTENT_URI;
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}
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Cursor cursor;
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try {
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for (; ; ) {
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// Try different combinations of queries. Some would work on some platforms.
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// So we query each combination until we find one returns non-empty result.
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cursor = querySystem(uri, true/*checkCurrent*/, apnName);
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if (cursor != null) {
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break;
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}
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cursor = querySystem(uri, false/*checkCurrent*/, apnName);
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if (cursor != null) {
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break;
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}
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cursor = querySystem(uri, true/*checkCurrent*/, null/*apnName*/);
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if (cursor != null) {
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break;
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}
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cursor = querySystem(uri, false/*checkCurrent*/, null/*apnName*/);
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break;
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}
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} catch (final SecurityException e) {
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// Can't access platform APN table, return directly
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return;
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}
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if (cursor == null) {
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return;
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}
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try {
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if (cursor.moveToFirst()) {
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final Apn apn = BaseApn.from(
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cursor.getString(COLUMN_TYPE),
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cursor.getString(COLUMN_MMSC),
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cursor.getString(COLUMN_MMSPROXY),
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cursor.getString(COLUMN_MMSPORT));
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if (apn != null) {
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apns.add(apn);
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}
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}
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} finally {
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cursor.close();
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}
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}
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/**
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* Query system APN table
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*
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* @param uri The APN query URL to use
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* @param checkCurrent If add "CURRENT IS NOT NULL" condition
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* @param apnName The optional APN name for query condition
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* @return A cursor of the query result. If a cursor is returned as not null, it is
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* guaranteed to contain at least one row.
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*/
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private Cursor querySystem(final Uri uri, final boolean checkCurrent, String apnName) {
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Log.i(MmsService.TAG, "Loading APNs from system, "
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+ "checkCurrent=" + checkCurrent + " apnName=" + apnName);
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final StringBuilder selectionBuilder = new StringBuilder();
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String[] selectionArgs = null;
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if (checkCurrent) {
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selectionBuilder.append(Telephony.Carriers.CURRENT).append(" IS NOT NULL");
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}
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apnName = trimWithNullCheck(apnName);
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if (!TextUtils.isEmpty(apnName)) {
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if (selectionBuilder.length() > 0) {
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selectionBuilder.append(" AND ");
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}
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selectionBuilder.append(Telephony.Carriers.APN).append("=?");
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selectionArgs = new String[] { apnName };
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}
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try {
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final Cursor cursor = mContext.getContentResolver().query(
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uri,
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APN_PROJECTION,
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selectionBuilder.toString(),
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selectionArgs,
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null/*sortOrder*/);
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if (cursor == null || cursor.getCount() < 1) {
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if (cursor != null) {
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cursor.close();
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}
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Log.w(MmsService.TAG, "Query " + uri + " with apn " + apnName + " and "
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+ (checkCurrent ? "checking CURRENT" : "not checking CURRENT")
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+ " returned empty");
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return null;
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}
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return cursor;
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} catch (final SQLiteException e) {
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Log.w(MmsService.TAG, "APN table query exception: " + e);
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} catch (final SecurityException e) {
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Log.w(MmsService.TAG, "Platform restricts APN table access: " + e);
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throw e;
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}
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return null;
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}
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private static String trimWithNullCheck(final String value) {
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return value != null ? value.trim() : null;
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}
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/**
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* Trim leading zeros from IPv4 address strings
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* Our base libraries will interpret that as octel..
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* Must leave non v4 addresses and host names alone.
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* For example, 192.168.000.010 -> 192.168.0.10
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*
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* @param addr a string representing an ip addr
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* @return a string propertly trimmed
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*/
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private static String trimV4AddrZeros(final String addr) {
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if (addr == null) {
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return null;
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}
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final String[] octets = addr.split("\\.");
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if (octets.length != 4) {
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return addr;
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}
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final StringBuilder builder = new StringBuilder(16);
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String result;
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for (int i = 0; i < 4; i++) {
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try {
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if (octets[i].length() > 3) {
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return addr;
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}
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builder.append(Integer.parseInt(octets[i]));
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} catch (final NumberFormatException e) {
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return addr;
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}
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if (i < 3) {
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builder.append('.');
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}
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}
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result = builder.toString();
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return result;
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}
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/**
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* Check if the APN contains the APN type we want
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*
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* @param types The string encodes a list of supported types
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* @param requestType The type we want
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* @return true if the input types string contains the requestType
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*/
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public static boolean isValidApnType(final String types, final String requestType) {
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// If APN type is unspecified, assume APN_TYPE_ALL.
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if (TextUtils.isEmpty(types)) {
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return true;
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}
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for (final String t : types.split(",")) {
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if (t.equals(requestType) || t.equals(APN_TYPE_ALL)) {
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return true;
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}
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}
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return false;
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}
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}
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