/*
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* Copyright (C) 2017 The Android Open Source 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 com.android.server.wifi;
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import com.android.server.wifi.util.XmlUtil;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import org.xmlpull.v1.XmlSerializer;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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/**
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* This class performs serialization and parsing of XML data block that contain the list of
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* deleted ephemeral SSIDs (XML block data inside <DeletedEphemeralSSIDList> tag).
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*/
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public class DeletedEphemeralSsidsStoreData implements WifiConfigStore.StoreData {
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private static final String XML_TAG_SECTION_HEADER_DELETED_EPHEMERAL_SSID_LIST =
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"DeletedEphemeralSSIDList";
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private static final String XML_TAG_SSID_LIST = "SSIDList";
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private final Clock mClock;
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private Map<String, Long> mSsidToTimeMap;
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DeletedEphemeralSsidsStoreData(Clock clock) {
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mClock = clock;
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}
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@Override
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public void serializeData(XmlSerializer out)
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throws XmlPullParserException, IOException {
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if (mSsidToTimeMap != null) {
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XmlUtil.writeNextValue(out, XML_TAG_SSID_LIST, mSsidToTimeMap);
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}
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}
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@Override
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public void deserializeData(XmlPullParser in, int outerTagDepth)
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throws XmlPullParserException, IOException {
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// Ignore empty reads.
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if (in == null) {
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return;
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}
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while (!XmlUtil.isNextSectionEnd(in, outerTagDepth)) {
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String[] valueName = new String[1];
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Object value = XmlUtil.readCurrentValue(in, valueName);
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if (valueName[0] == null) {
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throw new XmlPullParserException("Missing value name");
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}
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switch (valueName[0]) {
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case XML_TAG_SSID_LIST:
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// Backwards compatibility, this used to be a set.
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if (value instanceof Set) {
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mSsidToTimeMap = new HashMap<>();
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for (String ssid : (Set<String>) value) {
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// Mark the deleted time as bootup time for existing entries from
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// previous releases.
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mSsidToTimeMap.put(ssid, mClock.getWallClockMillis());
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}
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} else if (value instanceof Map) {
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mSsidToTimeMap = (Map<String, Long>) value;
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}
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break;
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default:
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throw new XmlPullParserException("Unknown tag under "
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+ XML_TAG_SECTION_HEADER_DELETED_EPHEMERAL_SSID_LIST
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+ ": " + valueName[0]);
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}
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}
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}
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@Override
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public void resetData() {
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mSsidToTimeMap = null;
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}
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@Override
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public boolean hasNewDataToSerialize() {
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// always persist.
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return true;
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}
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@Override
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public String getName() {
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return XML_TAG_SECTION_HEADER_DELETED_EPHEMERAL_SSID_LIST;
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}
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@Override
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public @WifiConfigStore.StoreFileId int getStoreFileId() {
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// Shared general store.
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return WifiConfigStore.STORE_FILE_USER_GENERAL;
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}
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/**
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* An empty map will be returned for null SSID list.
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*
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* @return Map of SSIDs
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*/
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public Map<String, Long> getSsidToTimeMap() {
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if (mSsidToTimeMap == null) {
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return new HashMap<String, Long>();
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}
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return mSsidToTimeMap;
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}
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public void setSsidToTimeMap(Map<String, Long> ssidMap) {
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mSsidToTimeMap = ssidMap;
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}
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}
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