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/*
* 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.server.wifi;
import android.annotation.Nullable;
import com.android.server.wifi.util.WifiConfigStoreEncryptionUtil;
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;
/**
* This class performs serialization and parsing of XML data block that contain the mapping
* from configKey to randomized MAC address
* (XML block data inside <MacAddressMappingList> tag).
*/
public class RandomizedMacStoreData implements WifiConfigStore.StoreData {
private static final String XML_TAG_SECTION_HEADER_MAC_ADDRESS_MAP = "MacAddressMap";
private static final String XML_TAG_MAC_MAP = "MacMapEntry";
private Map<String, String> mMacMapping;
RandomizedMacStoreData() {}
@Override
public void serializeData(XmlSerializer out,
@Nullable WifiConfigStoreEncryptionUtil encryptionUtil)
throws XmlPullParserException, IOException {
if (mMacMapping != null) {
XmlUtil.writeNextValue(out, XML_TAG_MAC_MAP, mMacMapping);
}
}
@Override
public void deserializeData(XmlPullParser in, int outerTagDepth,
@WifiConfigStore.Version int version,
@Nullable WifiConfigStoreEncryptionUtil encryptionUtil)
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_MAC_MAP:
mMacMapping = (Map<String, String>) value;
break;
default:
throw new XmlPullParserException("Unknown tag under "
+ XML_TAG_SECTION_HEADER_MAC_ADDRESS_MAP
+ ": " + valueName[0]);
}
}
}
@Override
public void resetData() {
mMacMapping = null;
}
@Override
public boolean hasNewDataToSerialize() {
// always persist.
return true;
}
@Override
public String getName() {
return XML_TAG_SECTION_HEADER_MAC_ADDRESS_MAP;
}
@Override
public @WifiConfigStore.StoreFileId int getStoreFileId() {
// Shared general store.
return WifiConfigStore.STORE_FILE_SHARED_GENERAL;
}
/**
* An empty Map will be returned for null MAC address map.
*
* @return Map of mapping from configKey to the randomized MAC address.
*/
public Map<String, String> getMacMapping() {
if (mMacMapping == null) {
return new HashMap<String, String>();
}
return mMacMapping;
}
/**
* Sets the data to be stored to file.
* @param macMapping
*/
public void setMacMapping(Map<String, String> macMapping) {
mMacMapping = macMapping;
}
}
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