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/*
* Copyright (C) 2009, 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 com.android.server.vpn;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
/**
* A helper class for sending commands to the MTP daemon (mtpd).
*/
class MtpdHelper {
static final String MTPD = "mtpd";
private static final String VPN_LINKNAME = "vpn";
private static final String PPP_ARGS_SEPARATOR = "";
static void sendCommand(VpnService<?> vpnService, String protocol,
String serverIp, String port, String secret, String username,
String password) throws IOException {
sendCommand(vpnService, protocol, serverIp, port, secret, username,
password, false);
}
static void sendCommand(VpnService<?> vpnService, String protocol,
String serverIp, String port, String secret, String username,
String password, boolean encryption) throws IOException {
ArrayList<String> args = new ArrayList<String>();
args.addAll(Arrays.asList(protocol, serverIp, port));
if (secret != null) args.add(secret);
args.add(PPP_ARGS_SEPARATOR);
addPppArguments(args, serverIp, username, password, encryption);
DaemonProxy mtpd = vpnService.startDaemon(MTPD);
mtpd.sendCommand(args.toArray(new String[args.size()]));
}
private static void addPppArguments(ArrayList<String> args, String serverIp,
String username, String password, boolean encryption)
throws IOException {
args.addAll(Arrays.asList(
"linkname", VPN_LINKNAME,
"name", username,
"password", password,
"refuse-eap", "nodefaultroute", "usepeerdns",
"idle", "1800",
"mtu", "1400",
"mru", "1400"));
if (encryption) {
args.add("+mppe");
}
}
private MtpdHelper() {
}
}
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