95 lines
2.8 KiB
Java
95 lines
2.8 KiB
Java
/*
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* Copyright © 2017-2018 WireGuard LLC. All Rights Reserved.
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* SPDX-License-Identifier: Apache-2.0
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*/
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package com.wireguard.config;
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import android.annotation.SuppressLint;
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import android.support.annotation.Nullable;
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import android.text.TextUtils;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* The set of valid attributes for an interface or peer in a WireGuard configuration file.
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*/
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public enum Attribute {
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ADDRESS("Address"),
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ALLOWED_IPS("AllowedIPs"),
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DNS("DNS"),
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EXCLUDED_APPLICATIONS("ExcludedApplications"),
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ENDPOINT("Endpoint"),
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LISTEN_PORT("ListenPort"),
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MTU("MTU"),
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PERSISTENT_KEEPALIVE("PersistentKeepalive"),
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PRESHARED_KEY("PresharedKey"),
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PRIVATE_KEY("PrivateKey"),
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PUBLIC_KEY("PublicKey");
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private static final String[] EMPTY_LIST = new String[0];
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private static final Map<String, Attribute> KEY_MAP;
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private static final Pattern LIST_SEPARATOR_PATTERN = Pattern.compile("\\s*,\\s*");
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private static final Pattern SEPARATOR_PATTERN = Pattern.compile("\\s|=");
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static {
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KEY_MAP = new HashMap<>(Attribute.values().length);
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for (final Attribute key : Attribute.values()) {
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KEY_MAP.put(key.token.toLowerCase(), key);
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}
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}
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private final Pattern pattern;
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private final String token;
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Attribute(final String token) {
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pattern = Pattern.compile(token + "\\s*=\\s*(\\S.*)");
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this.token = token;
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}
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public static <T> String iterableToString(final Iterable<T> iterable) {
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return TextUtils.join(", ", iterable);
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}
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@Nullable
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public static Attribute match(final CharSequence line) {
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return KEY_MAP.get(SEPARATOR_PATTERN.split(line)[0].toLowerCase());
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}
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public static String[] stringToList(@Nullable final String string) {
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if (TextUtils.isEmpty(string))
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return EMPTY_LIST;
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return LIST_SEPARATOR_PATTERN.split(string.trim());
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}
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@SuppressLint("DefaultLocale")
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public String composeWith(@Nullable final Object value) {
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return String.format("%s = %s%n", token, value);
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}
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@SuppressLint("DefaultLocale")
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public String composeWith(final int value) {
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return String.format("%s = %d%n", token, value);
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}
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public <T> String composeWith(final Iterable<T> value) {
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return String.format("%s = %s%n", token, iterableToString(value));
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}
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@Nullable
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public String parse(final CharSequence line) {
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final Matcher matcher = pattern.matcher(line);
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return matcher.matches() ? matcher.group(1) : null;
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}
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@Nullable
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public String[] parseList(final CharSequence line) {
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final Matcher matcher = pattern.matcher(line);
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return matcher.matches() ? stringToList(matcher.group(1)) : null;
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}
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}
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