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