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package com.wireguard.config;
import android.databinding.BaseObservable;
import android.databinding.Bindable;
import android.os.Parcel;
import android.os.Parcelable;
import com.android.databinding.library.baseAdapters.BR;
import java.net.Inet6Address;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.UnknownHostException;
import java.util.LinkedList;
import java.util.List;
/**
* Represents the configuration for a WireGuard peer (a [Peer] block).
*/
public class Peer extends BaseObservable implements Parcelable {
public static final Creator<Peer> CREATOR = new Creator<Peer>() {
@Override
public Peer createFromParcel(final Parcel in) {
return new Peer(in);
}
@Override
public Peer[] newArray(final int size) {
return new Peer[size];
}
};
private List<IPCidr> allowedIPsList;
private InetSocketAddress endpoint;
private int persistentKeepalive;
private String preSharedKey;
private String publicKey;
public Peer() {
allowedIPsList = new LinkedList<>();
}
private Peer(final Parcel in) {
allowedIPsList = in.createTypedArrayList(IPCidr.CREATOR);
String host = in.readString();
int port = in.readInt();
if (host != null && !host.isEmpty() && port > 0)
endpoint = InetSocketAddress.createUnresolved(host, port);
persistentKeepalive = in.readInt();
preSharedKey = in.readString();
if (preSharedKey != null && preSharedKey.isEmpty())
preSharedKey = null;
publicKey = in.readString();
if (publicKey != null && publicKey.isEmpty())
publicKey = null;
}
public static Peer newInstance() {
return new Peer();
}
@Override
public int describeContents() {
return 0;
}
@Bindable
public String getAllowedIPsString() {
if (allowedIPsList.isEmpty())
return null;
return Attribute.listToString(allowedIPsList);
}
@Bindable
public IPCidr[] getAllowedIPs() {
return allowedIPsList.toArray(new IPCidr[allowedIPsList.size()]);
}
@Bindable
public InetSocketAddress getEndpoint() {
return endpoint;
}
@Bindable
public String getEndpointString() {
if (endpoint == null)
return null;
return String.format("%s:%d", endpoint.getHostString(), endpoint.getPort());
}
public String getResolvedEndpointString() throws UnknownHostException {
if (endpoint == null)
throw new UnknownHostException("{empty}");
if (endpoint.isUnresolved())
endpoint = new InetSocketAddress(endpoint.getHostString(), endpoint.getPort());
if (endpoint.isUnresolved())
throw new UnknownHostException(endpoint.getHostString());
if (endpoint.getAddress() instanceof Inet6Address)
return String.format("[%s]:%d", endpoint.getAddress().getHostAddress(), endpoint.getPort());
return String.format("%s:%d", endpoint.getAddress().getHostAddress(), endpoint.getPort());
}
@Bindable
public int getPersistentKeepalive() {
return persistentKeepalive;
}
@Bindable
public String getPersistentKeepaliveString() {
if (persistentKeepalive == 0)
return null;
return new Integer(persistentKeepalive).toString();
}
@Bindable
public String getPreSharedKey() {
return preSharedKey;
}
@Bindable
public String getPublicKey() {
return publicKey;
}
public void parse(final String line) {
final Attribute key = Attribute.match(line);
if (key == Attribute.ALLOWED_IPS)
addAllowedIPs(key.parseList(line));
else if (key == Attribute.ENDPOINT)
setEndpointString(key.parse(line));
else if (key == Attribute.PERSISTENT_KEEPALIVE)
setPersistentKeepaliveString(key.parse(line));
else if (key == Attribute.PRESHARED_KEY)
setPreSharedKey(key.parse(line));
else if (key == Attribute.PUBLIC_KEY)
setPublicKey(key.parse(line));
else
throw new IllegalArgumentException(line);
}
public void addAllowedIPs(String[] allowedIPs) {
if (allowedIPs != null && allowedIPs.length > 0) {
for (final String allowedIP : allowedIPs) {
if (allowedIP.isEmpty())
throw new IllegalArgumentException("AllowedIP is empty");
this.allowedIPsList.add(new IPCidr(allowedIP));
}
}
notifyPropertyChanged(BR.allowedIPs);
notifyPropertyChanged(BR.allowedIPsString);
}
public void setAllowedIPsString(final String allowedIPsString) {
this.allowedIPsList.clear();
addAllowedIPs(Attribute.stringToList(allowedIPsString));
}
public void setEndpoint(InetSocketAddress endpoint) {
this.endpoint = endpoint;
notifyPropertyChanged(BR.endpoint);
notifyPropertyChanged(BR.endpointString);
}
public void setEndpointString(final String endpoint) {
if (endpoint != null && !endpoint.isEmpty()) {
InetSocketAddress constructedEndpoint;
if (endpoint.indexOf('/') != -1 || endpoint.indexOf('?') != -1 || endpoint.indexOf('#') != -1)
throw new IllegalArgumentException("Forbidden characters in endpoint");
URI uri;
try {
uri = new URI("wg://" + endpoint);
} catch (URISyntaxException e) {
throw new IllegalArgumentException(e);
}
constructedEndpoint = InetSocketAddress.createUnresolved(uri.getHost(), uri.getPort());
setEndpoint(constructedEndpoint);
} else
setEndpoint(null);
}
public void setPersistentKeepalive(int persistentKeepalive) {
this.persistentKeepalive = persistentKeepalive;
notifyPropertyChanged(BR.persistentKeepalive);
notifyPropertyChanged(BR.persistentKeepaliveString);
}
public void setPersistentKeepaliveString(String persistentKeepalive) {
if (persistentKeepalive != null && !persistentKeepalive.isEmpty())
setPersistentKeepalive(Integer.parseInt(persistentKeepalive, 10));
else
setPersistentKeepalive(0);
}
public void setPreSharedKey(String preSharedKey) {
if (preSharedKey != null && preSharedKey.isEmpty())
preSharedKey = null;
this.preSharedKey = preSharedKey;
notifyPropertyChanged(BR.preSharedKey);
}
public void setPublicKey(String publicKey) {
if (publicKey != null && publicKey.isEmpty())
publicKey = null;
this.publicKey = publicKey;
notifyPropertyChanged(BR.publicKey);
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder().append("[Peer]\n");
if (!allowedIPsList.isEmpty())
sb.append(Attribute.ALLOWED_IPS.composeWith(allowedIPsList));
if (endpoint != null)
sb.append(Attribute.ENDPOINT.composeWith(getEndpointString()));
if (persistentKeepalive != 0)
sb.append(Attribute.PERSISTENT_KEEPALIVE.composeWith(persistentKeepalive));
if (preSharedKey != null)
sb.append(Attribute.PRESHARED_KEY.composeWith(preSharedKey));
if (publicKey != null)
sb.append(Attribute.PUBLIC_KEY.composeWith(publicKey));
return sb.toString();
}
@Override
public void writeToParcel(final Parcel dest, final int flags) {
dest.writeTypedList(allowedIPsList);
dest.writeString(endpoint == null ? null : endpoint.getHostString());
dest.writeInt(endpoint == null ? 0 : endpoint.getPort());
dest.writeInt(persistentKeepalive);
dest.writeString(preSharedKey);
dest.writeString(publicKey);
}
}
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