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// Copyright (C) 2013 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.google.gerrit.server.ssh;
import com.google.common.collect.Lists;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.util.SocketUtil;
import com.google.inject.AbstractModule;
import com.google.inject.Provides;
import com.google.inject.Singleton;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.eclipse.jgit.lib.Config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SshAddressesModule extends AbstractModule {
private static final Logger log = LoggerFactory.getLogger(SshAddressesModule.class);
public static final int DEFAULT_PORT = 29418;
public static final int IANA_SSH_PORT = 22;
@Override
protected void configure() {}
@Provides
@Singleton
@SshListenAddresses
public List<SocketAddress> getListenAddresses(@GerritServerConfig Config cfg) {
List<SocketAddress> listen = Lists.newArrayListWithExpectedSize(2);
String[] want = cfg.getStringList("sshd", null, "listenaddress");
if (want == null || want.length == 0) {
listen.add(new InetSocketAddress(DEFAULT_PORT));
return listen;
}
if (want.length == 1 && isOff(want[0])) {
return listen;
}
for (String desc : want) {
try {
listen.add(SocketUtil.resolve(desc, DEFAULT_PORT));
} catch (IllegalArgumentException e) {
log.error("Bad sshd.listenaddress: " + desc + ": " + e.getMessage());
}
}
return listen;
}
private static boolean isOff(String listenHostname) {
return "off".equalsIgnoreCase(listenHostname)
|| "none".equalsIgnoreCase(listenHostname)
|| "no".equalsIgnoreCase(listenHostname);
}
@Provides
@Singleton
@SshAdvertisedAddresses
List<String> getAdvertisedAddresses(
@GerritServerConfig Config cfg, @SshListenAddresses List<SocketAddress> listen) {
String[] want = cfg.getStringList("sshd", null, "advertisedaddress");
if (want.length > 0) {
return Arrays.asList(want);
}
List<InetSocketAddress> pub = new ArrayList<>();
List<InetSocketAddress> local = new ArrayList<>();
for (SocketAddress addr : listen) {
if (addr instanceof InetSocketAddress) {
InetSocketAddress inetAddr = (InetSocketAddress) addr;
if (inetAddr.getAddress().isLoopbackAddress()) {
local.add(inetAddr);
} else {
pub.add(inetAddr);
}
}
}
if (pub.isEmpty()) {
pub = local;
}
List<String> adv = Lists.newArrayListWithCapacity(pub.size());
for (InetSocketAddress addr : pub) {
adv.add(SocketUtil.format(addr, IANA_SSH_PORT));
}
return adv;
}
}