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/*
* Copyright © 2018 Samuel Holland <samuel@sholland.org>
* Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.config;
import android.databinding.BaseObservable;
import android.databinding.Bindable;
import android.databinding.ObservableArrayList;
import android.databinding.ObservableList;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.annotation.Nullable;
import com.android.databinding.library.baseAdapters.BR;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
/**
* Represents a wg-quick configuration file, its name, and its connection state.
*/
public class Config {
private final Interface interfaceSection = new Interface();
private List<Peer> peers = new ArrayList<>();
public static Config from(final String string) throws IOException {
return from(new BufferedReader(new StringReader(string)));
}
public static Config from(final InputStream stream) throws IOException {
return from(new BufferedReader(new InputStreamReader(stream, StandardCharsets.UTF_8)));
}
public static Config from(final BufferedReader reader) throws IOException {
final Config config = new Config();
Peer currentPeer = null;
String line;
boolean inInterfaceSection = false;
while ((line = reader.readLine()) != null) {
final int commentIndex = line.indexOf('#');
if (commentIndex != -1)
line = line.substring(0, commentIndex);
line = line.trim();
if (line.isEmpty())
continue;
if ("[Interface]".toLowerCase().equals(line.toLowerCase())) {
currentPeer = null;
inInterfaceSection = true;
} else if ("[Peer]".toLowerCase().equals(line.toLowerCase())) {
currentPeer = new Peer();
config.peers.add(currentPeer);
inInterfaceSection = false;
} else if (inInterfaceSection) {
config.interfaceSection.parse(line);
} else if (currentPeer != null) {
currentPeer.parse(line);
} else {
throw new IllegalArgumentException("Invalid configuration line: " + line);
}
}
if (!inInterfaceSection && currentPeer == null) {
throw new IllegalArgumentException("Could not find any config information");
}
return config;
}
public Interface getInterface() {
return interfaceSection;
}
public List<Peer> getPeers() {
return peers;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder().append(interfaceSection);
for (final Peer peer : peers)
sb.append('\n').append(peer);
return sb.toString();
}
public static class Observable extends BaseObservable implements Parcelable {
public static final Creator<Observable> CREATOR = new Creator<Observable>() {
@Override
public Observable createFromParcel(final Parcel in) {
return new Observable(in);
}
@Override
public Observable[] newArray(final int size) {
return new Observable[size];
}
};
@Nullable private String name;
private final Interface.Observable observableInterface;
private final ObservableList<Peer.Observable> observablePeers;
public Observable(@Nullable final Config parent, @Nullable final String name) {
this.name = name;
observableInterface = new Interface.Observable(parent == null ? null : parent.interfaceSection);
observablePeers = new ObservableArrayList<>();
if (parent != null) {
for (final Peer peer : parent.getPeers())
observablePeers.add(new Peer.Observable(peer));
}
}
private Observable(final Parcel in) {
name = in.readString();
observableInterface = in.readParcelable(Interface.Observable.class.getClassLoader());
observablePeers = new ObservableArrayList<>();
in.readTypedList(observablePeers, Peer.Observable.CREATOR);
}
public void commitData(final Config parent) {
observableInterface.commitData(parent.interfaceSection);
final List<Peer> newPeers = new ArrayList<>(observablePeers.size());
for (final Peer.Observable observablePeer : observablePeers) {
final Peer peer = new Peer();
observablePeer.commitData(peer);
newPeers.add(peer);
}
parent.peers = newPeers;
notifyChange();
}
@Override
public int describeContents() {
return 0;
}
@Bindable
public Interface.Observable getInterfaceSection() {
return observableInterface;
}
@Bindable
public String getName() {
return name == null ? "" : name;
}
@Bindable
public ObservableList<Peer.Observable> getPeers() {
return observablePeers;
}
public void setName(final String name) {
this.name = name;
notifyPropertyChanged(BR.name);
}
@Override
public void writeToParcel(final Parcel dest, final int flags) {
dest.writeString(name);
dest.writeParcelable(observableInterface, flags);
dest.writeTypedList(observablePeers);
}
}
}
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