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package com.wireguard.config;
import android.databinding.BaseObservable;
import android.databinding.Bindable;
import android.databinding.Observable;
import android.databinding.ObservableArrayList;
import android.databinding.ObservableList;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.annotation.NonNull;
import com.wireguard.android.BR;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Pattern;
/**
* Represents a wg-quick configuration file, its name, and its connection state.
*/
public class Config extends BaseObservable
implements Comparable<Config>, Copyable<Config>, Observable, Parcelable {
public static final Parcelable.Creator<Config> CREATOR = new Parcelable.Creator<Config>() {
@Override
public Config createFromParcel(final Parcel in) {
return new Config(in);
}
@Override
public Config[] newArray(final int size) {
return new Config[size];
}
};
public static final int NAME_MAX_LENGTH = 16;
private static final Pattern PATTERN = Pattern.compile("^[a-zA-Z0-9_=+.-]{1,16}$");
public static boolean isNameValid(final String name) {
return name.length() <= NAME_MAX_LENGTH && PATTERN.matcher(name).matches();
}
private final Interface iface;
private boolean isEnabled;
private boolean isPrimary;
private String name;
private final ObservableList<Peer> peers = new ObservableArrayList<>();
public Config() {
iface = new Interface();
}
protected Config(final Parcel in) {
iface = in.readParcelable(Interface.class.getClassLoader());
name = in.readString();
// The flattened peers must be recreated to associate them with this config.
final List<Peer> flattenedPeers = new LinkedList<>();
in.readTypedList(flattenedPeers, Peer.CREATOR);
for (final Peer peer : flattenedPeers)
addPeer(peer);
}
public Peer addPeer() {
final Peer peer = new Peer(this);
peers.add(peer);
return peer;
}
private Peer addPeer(final Peer peer) {
final Peer copy = peer.copy(this);
peers.add(copy);
return copy;
}
@Override
public int compareTo(@NonNull final Config config) {
return getName().compareTo(config.getName());
}
@Override
public Config copy() {
final Config copy = new Config();
copy.copyFrom(this);
return copy;
}
@Override
public void copyFrom(final Config source) {
if (source != null) {
iface.copyFrom(source.iface);
name = source.name;
peers.clear();
for (final Peer peer : source.peers)
addPeer(peer);
} else {
iface.copyFrom(null);
name = null;
peers.clear();
}
notifyChange();
}
@Override
public int describeContents() {
return 0;
}
public Interface getInterface() {
return iface;
}
@Bindable
public String getName() {
return name;
}
public ObservableList<Peer> getPeers() {
return peers;
}
@Bindable
public boolean isEnabled() {
return isEnabled;
}
@Bindable
public boolean isPrimary() {
return isPrimary;
}
public void parseFrom(final InputStream stream)
throws IOException {
peers.clear();
try (BufferedReader reader = new BufferedReader(
new InputStreamReader(stream, StandardCharsets.UTF_8))) {
Peer currentPeer = null;
String line;
boolean inInterfaceSection = false;
while ((line = reader.readLine()) != null) {
if (line.isEmpty() || line.startsWith("#"))
continue;
if ("[Interface]".equals(line)) {
currentPeer = null;
inInterfaceSection = true;
} else if ("[Peer]".equals(line)) {
currentPeer = addPeer();
inInterfaceSection = false;
} else if (inInterfaceSection) {
iface.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");
}
}
}
public void setIsEnabled(final boolean isEnabled) {
this.isEnabled = isEnabled;
notifyPropertyChanged(BR.enabled);
}
public void setIsPrimary(final boolean isPrimary) {
this.isPrimary = isPrimary;
notifyPropertyChanged(BR.primary);
}
public void setName(final String name) {
if (name != null && !name.isEmpty() && !isNameValid(name))
throw new IllegalArgumentException();
this.name = name;
notifyPropertyChanged(BR.name);
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder().append(iface);
for (final Peer peer : peers)
sb.append('\n').append(peer);
return sb.toString();
}
@Override
public void writeToParcel(final Parcel dest, final int flags) {
dest.writeParcelable(iface, flags);
dest.writeString(name);
dest.writeTypedList(peers);
}
}
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