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/*
* Copyright (C) 2011 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 android.net;
import static android.net.ConnectivityManager.TYPE_MOBILE;
import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
import android.annotation.NonNull;
import android.service.NetworkIdentitySetProto;
import android.util.proto.ProtoOutputStream;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
/**
* Identity of a {@code iface}, defined by the set of {@link NetworkIdentity}
* active on that interface.
*
* @hide
*/
public class NetworkIdentitySet extends HashSet<NetworkIdentity> {
private static final int VERSION_INIT = 1;
private static final int VERSION_ADD_ROAMING = 2;
private static final int VERSION_ADD_NETWORK_ID = 3;
private static final int VERSION_ADD_METERED = 4;
private static final int VERSION_ADD_DEFAULT_NETWORK = 5;
private static final int VERSION_ADD_OEM_MANAGED_NETWORK = 6;
private static final int VERSION_ADD_SUB_ID = 7;
/**
* Construct a {@link NetworkIdentitySet} object.
*/
public NetworkIdentitySet() {
super();
}
/** @hide */
public NetworkIdentitySet(@NonNull Set<NetworkIdentity> ident) {
super(ident);
}
/** @hide */
public NetworkIdentitySet(DataInput in) throws IOException {
final int version = in.readInt();
final int size = in.readInt();
for (int i = 0; i < size; i++) {
if (version <= VERSION_INIT) {
final int ignored = in.readInt();
}
final int type = in.readInt();
final int ratType = in.readInt();
final String subscriberId = readOptionalString(in);
final String networkId;
if (version >= VERSION_ADD_NETWORK_ID) {
networkId = readOptionalString(in);
} else {
networkId = null;
}
final boolean roaming;
if (version >= VERSION_ADD_ROAMING) {
roaming = in.readBoolean();
} else {
roaming = false;
}
final boolean metered;
if (version >= VERSION_ADD_METERED) {
metered = in.readBoolean();
} else {
// If this is the old data and the type is mobile, treat it as metered. (Note that
// if this is a mobile network, TYPE_MOBILE is the only possible type that could be
// used.)
metered = (type == TYPE_MOBILE);
}
final boolean defaultNetwork;
if (version >= VERSION_ADD_DEFAULT_NETWORK) {
defaultNetwork = in.readBoolean();
} else {
defaultNetwork = true;
}
final int oemNetCapabilities;
if (version >= VERSION_ADD_OEM_MANAGED_NETWORK) {
oemNetCapabilities = in.readInt();
} else {
oemNetCapabilities = NetworkIdentity.OEM_NONE;
}
final int subId;
if (version >= VERSION_ADD_SUB_ID) {
subId = in.readInt();
} else {
subId = INVALID_SUBSCRIPTION_ID;
}
add(new NetworkIdentity(type, ratType, subscriberId, networkId, roaming, metered,
defaultNetwork, oemNetCapabilities, subId));
}
}
/**
* Method to serialize this object into a {@code DataOutput}.
* @hide
*/
public void writeToStream(DataOutput out) throws IOException {
out.writeInt(VERSION_ADD_SUB_ID);
out.writeInt(size());
for (NetworkIdentity ident : this) {
out.writeInt(ident.getType());
out.writeInt(ident.getRatType());
writeOptionalString(out, ident.getSubscriberId());
writeOptionalString(out, ident.getWifiNetworkKey());
out.writeBoolean(ident.isRoaming());
out.writeBoolean(ident.isMetered());
out.writeBoolean(ident.isDefaultNetwork());
out.writeInt(ident.getOemManaged());
out.writeInt(ident.getSubId());
}
}
/**
* @return whether any {@link NetworkIdentity} in this set is considered metered.
* @hide
*/
public boolean isAnyMemberMetered() {
if (isEmpty()) {
return false;
}
for (NetworkIdentity ident : this) {
if (ident.isMetered()) {
return true;
}
}
return false;
}
/**
* @return whether any {@link NetworkIdentity} in this set is considered roaming.
* @hide
*/
public boolean isAnyMemberRoaming() {
if (isEmpty()) {
return false;
}
for (NetworkIdentity ident : this) {
if (ident.isRoaming()) {
return true;
}
}
return false;
}
/**
* @return whether any {@link NetworkIdentity} in this set is considered on the default
* network.
* @hide
*/
public boolean areAllMembersOnDefaultNetwork() {
if (isEmpty()) {
return true;
}
for (NetworkIdentity ident : this) {
if (!ident.isDefaultNetwork()) {
return false;
}
}
return true;
}
private static void writeOptionalString(DataOutput out, String value) throws IOException {
if (value != null) {
out.writeByte(1);
out.writeUTF(value);
} else {
out.writeByte(0);
}
}
private static String readOptionalString(DataInput in) throws IOException {
if (in.readByte() != 0) {
return in.readUTF();
} else {
return null;
}
}
public static int compare(@NonNull NetworkIdentitySet left, @NonNull NetworkIdentitySet right) {
Objects.requireNonNull(left);
Objects.requireNonNull(right);
if (left.isEmpty() && right.isEmpty()) return 0;
if (left.isEmpty()) return -1;
if (right.isEmpty()) return 1;
final NetworkIdentity leftIdent = left.iterator().next();
final NetworkIdentity rightIdent = right.iterator().next();
return NetworkIdentity.compare(leftIdent, rightIdent);
}
/**
* Method to dump this object into proto debug file.
* @hide
*/
public void dumpDebug(ProtoOutputStream proto, long tag) {
final long start = proto.start(tag);
for (NetworkIdentity ident : this) {
ident.dumpDebug(proto, NetworkIdentitySetProto.IDENTITIES);
}
proto.end(start);
}
}
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