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DBPort.java
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DBPort.java
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// DBPort.java
/**
* Copyright (C) 2008 10gen Inc.
*
* 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.mongodb;
import com.mongodb.util.ThreadUtil;
import org.ietf.jgss.GSSCredential;
import org.ietf.jgss.GSSException;
import org.ietf.jgss.GSSManager;
import org.ietf.jgss.GSSName;
import org.ietf.jgss.Oid;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.sasl.Sasl;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.atomic.AtomicLong;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* represents a Port to the database, which is effectively a single connection to a server
* Methods implemented at the port level should throw the raw exceptions like IOException,
* so that the connector above can make appropriate decisions on how to handle.
*/
public class DBPort {
/**
* the default port
*/
public static final int PORT = 27017;
static final boolean USE_NAGLE = false;
static final long CONN_RETRY_TIME_MS = 15000;
/**
* creates a new DBPort
* @param addr the server address
*/
@SuppressWarnings("deprecation")
public DBPort( ServerAddress addr ){
this( addr , null , new MongoOptions() );
}
DBPort( ServerAddress addr, DBPortPool pool, MongoOptions options ){
_options = options;
_sa = addr;
_addr = addr.getSocketAddress();
_pool = pool;
_hashCode = _addr.hashCode();
_logger = Logger.getLogger( _rootLogger.getName() + "." + addr.toString() );
_decoder = _options.dbDecoderFactory.create();
}
Response call( OutMessage msg , DBCollection coll ) throws IOException{
return go( msg, coll );
}
Response call(OutMessage msg, DBCollection coll, DBDecoder decoder) throws IOException{
return go( msg, coll, false, decoder);
}
void say( OutMessage msg )
throws IOException {
go( msg , null );
}
private synchronized Response go( OutMessage msg , DBCollection coll )
throws IOException {
return go( msg , coll , false, null );
}
private synchronized Response go( OutMessage msg , DBCollection coll , DBDecoder decoder ) throws IOException{
return go( msg, coll, false, decoder );
}
private synchronized Response go(OutMessage msg, DBCollection coll, boolean forceResponse, DBDecoder decoder)
throws IOException {
if ( _processingResponse ){
if ( coll == null ){
// this could be a pipeline and should be safe
}
else {
// this could cause issues since we're reading data off the wire
throw new IllegalStateException( "DBPort.go called and expecting a response while processing another response" );
}
}
_calls.incrementAndGet();
if ( _socket == null )
_open();
if ( _out == null )
throw new IllegalStateException( "_out shouldn't be null" );
try {
msg.prepare();
_activeState = new ActiveState(msg);
msg.pipe( _out );
if ( _pool != null )
_pool._everWorked = true;
if ( coll == null && ! forceResponse )
return null;
_processingResponse = true;
return new Response( _sa , coll , _in , (decoder == null ? _decoder : decoder) );
}
catch ( IOException ioe ){
close();
throw ioe;
}
finally {
_activeState = null;
_processingResponse = false;
}
}
synchronized CommandResult getLastError( DB db , WriteConcern concern ) throws IOException{
DBApiLayer dbAL = (DBApiLayer) db;
return runCommand( dbAL, concern.getCommand() );
}
synchronized private Response findOne( DB db , String coll , DBObject q ) throws IOException {
OutMessage msg = OutMessage.query( db.getCollection(coll) , 0 , 0 , -1 , q , null );
Response res = go( msg , db.getCollection( coll ) , null );
return res;
}
synchronized CommandResult runCommand( DB db , DBObject cmd ) throws IOException {
Response res = findOne(db, "$cmd", cmd);
return convertToCommandResult(cmd, res);
}
private CommandResult convertToCommandResult(DBObject cmd, Response res) {
if ( res.size() == 0 )
return null;
if ( res.size() > 1 )
throw new MongoInternalException( "something is wrong. size:" + res.size() );
DBObject data = res.get(0);
if ( data == null )
throw new MongoInternalException( "something is wrong, no command result" );
CommandResult cr = new CommandResult(res.serverUsed());
cr.putAll( data );
return cr;
}
synchronized CommandResult tryGetLastError( DB db , long last, WriteConcern concern) throws IOException {
if ( last != _calls.get() )
return null;
return getLastError(db, concern);
}
/**
* makes sure that a connection to the server has been opened
* @throws IOException
*/
public synchronized void ensureOpen()
throws IOException {
if ( _socket != null )
return;
_open();
}
void _open() throws IOException {
long sleepTime = 100;
long maxAutoConnectRetryTime = CONN_RETRY_TIME_MS;
if (_options.maxAutoConnectRetryTime > 0) {
maxAutoConnectRetryTime = _options.maxAutoConnectRetryTime;
}
boolean successfullyConnected = false;
final long start = System.currentTimeMillis();
do {
try {
_socket = _options.socketFactory.createSocket();
_socket.connect( _addr , _options.connectTimeout );
_socket.setTcpNoDelay( ! USE_NAGLE );
_socket.setKeepAlive( _options.socketKeepAlive );
_socket.setSoTimeout( _options.socketTimeout );
_in = new BufferedInputStream( _socket.getInputStream() );
_out = _socket.getOutputStream();
successfullyConnected = true;
}
catch ( IOException e ){
close();
if (!_options.autoConnectRetry || (_pool != null && !_pool._everWorked))
throw e;
long waitSoFar = System.currentTimeMillis() - start;
if (waitSoFar >= maxAutoConnectRetryTime)
throw e;
if (sleepTime + waitSoFar > maxAutoConnectRetryTime)
sleepTime = maxAutoConnectRetryTime - waitSoFar;
_logger.log(Level.WARNING, "Exception connecting to " + serverAddress().getHost() + ": " + e +
". Total wait time so far is " + waitSoFar + " ms. Will retry after sleeping for " + sleepTime + " ms.");
ThreadUtil.sleep(sleepTime);
sleepTime *= 2;
}
} while (!successfullyConnected);
}
@Override
public int hashCode(){
return _hashCode;
}
/**
* returns a String representation of the target host
* @return
*/
public String host(){
return _addr.toString();
}
/**
* @return the server address for this port
*/
public ServerAddress serverAddress() {
return _sa;
}
@Override
public String toString(){
return "{DBPort " + host() + "}";
}
@Override
protected void finalize() throws Throwable{
super.finalize();
close();
}
ActiveState getActiveState() {
return _activeState;
}
int getLocalPort() {
return _socket != null ? _socket.getLocalPort() : -1;
}
/**
* closes the underlying connection and streams
*/
protected void close(){
authenticatedDatabases.clear();
if ( _socket != null ){
try {
_socket.close();
}
catch ( Exception e ){
// don't care
}
}
_in = null;
_out = null;
_socket = null;
}
CommandResult authenticate(Mongo mongo, final MongoCredential credentials) {
Authenticator authenticator;
if (credentials.getMechanism().equals(MongoCredential.MONGODB_CR_MECHANISM)) {
authenticator = new NativeAuthenticator(mongo, credentials);
} else if (credentials.getMechanism().equals(MongoCredential.GSSAPI_MECHANISM)) {
authenticator = new GSSAPIAuthenticator(mongo, credentials);
} else {
throw new IllegalArgumentException("Unsupported authentication protocol: " + credentials.getMechanism());
}
CommandResult res = authenticator.authenticate();
authenticatedDatabases.add(credentials.getSource());
return res;
}
void checkAuth(Mongo mongo) throws IOException {
// get the difference between the set of credentialed databases and the set of authenticated databases on this connection
Set<String> unauthenticatedDatabases = new HashSet<String>(mongo.getAuthority().getCredentialsStore().getDatabases());
unauthenticatedDatabases.removeAll(authenticatedDatabases);
for (String databaseName : unauthenticatedDatabases) {
authenticate(mongo, mongo.getAuthority().getCredentialsStore().get(databaseName));
}
}
/**
* Gets the pool that this port belongs to.
* @return the pool that this port belongs to.
*/
public DBPortPool getPool() {
return _pool;
}
private static Logger _rootLogger = Logger.getLogger( "com.mongodb.port" );
final int _hashCode;
final ServerAddress _sa;
final InetSocketAddress _addr;
final DBPortPool _pool;
final MongoOptions _options;
final Logger _logger;
final DBDecoder _decoder;
private volatile Socket _socket;
private volatile InputStream _in;
private volatile OutputStream _out;
private volatile boolean _processingResponse;
// needs synchronization to ensure that modifications are published.
final Set<String> authenticatedDatabases = Collections.synchronizedSet(new HashSet<String>());
volatile int _lastThread;
final AtomicLong _calls = new AtomicLong();
private volatile ActiveState _activeState;
private volatile Boolean useCRAMAuthenticationProtocol;
class ActiveState {
ActiveState(final OutMessage outMessage) {
this.outMessage = outMessage;
this.startTime = System.nanoTime();
this.threadName = Thread.currentThread().getName();
}
final OutMessage outMessage;
final long startTime;
final String threadName;
}
class GenericSaslAuthenticator extends SaslAuthenticator {
static final String CRAM_MD5 = "CRAM-MD5";
private final String mechanism;
GenericSaslAuthenticator(final Mongo mongo, MongoCredential credentials, String mechanism) {
super(mongo, credentials);
this.mechanism = mechanism;
}
@Override
protected SaslClient createSaslClient() {
try {
return Sasl.createSaslClient(new String[]{mechanism},
credential.getUserName(), MONGODB_PROTOCOL,
serverAddress().getHost(), null, new CredentialsHandlingCallbackHandler());
} catch (SaslException e) {
throw new MongoException("Exception initializing SASL client", e);
}
}
@Override
protected DB getDatabase() {
return mongo.getDB(credential.getSource());
}
@Override
public String getMechanismName() {
return mechanism;
}
class CredentialsHandlingCallbackHandler implements CallbackHandler {
public void handle(final Callback[] callbacks) throws IOException, UnsupportedCallbackException {
for (Callback callback : callbacks) {
if (callback instanceof NameCallback) {
NameCallback nameCallback = (NameCallback) callback;
nameCallback.setName(credential.getUserName());
}
if (callback instanceof PasswordCallback) {
PasswordCallback passwordCallback = (PasswordCallback) callback;
String hashedPassword = new String(NativeAuthenticationHelper.createHash(
credential.getUserName(), credential.getPassword()));
passwordCallback.setPassword(hashedPassword.toCharArray());
}
}
}
}
}
class GSSAPIAuthenticator extends SaslAuthenticator {
public static final String GSSAPI_OID = "1.2.840.113554.1.2.2";
public static final String GSSAPI_MECHANISM = MongoCredential.GSSAPI_MECHANISM;
GSSAPIAuthenticator(final Mongo mongo, final MongoCredential credentials) {
super(mongo, credentials);
if (!this.credential.getMechanism().equals(MongoCredential.GSSAPI_MECHANISM)) {
throw new MongoException("Incorrect mechanism: " + this.credential.getMechanism());
}
}
@Override
protected SaslClient createSaslClient() {
try {
Map<String, Object> props = new HashMap<String, Object>();
props.put(Sasl.CREDENTIALS, getGSSCredential(credential.getUserName()));
return Sasl.createSaslClient(new String[]{GSSAPI_MECHANISM}, credential.getUserName(), MONGODB_PROTOCOL,
serverAddress().getHost(), props, null);
} catch (SaslException e) {
throw new MongoException("Exception initializing SASL client", e);
} catch (GSSException e) {
throw new MongoException("Exception initializing GSSAPI credentials", e);
}
}
@Override
protected DB getDatabase() {
return mongo.getDB(credential.getSource());
}
@Override
public String getMechanismName() {
return "GSSAPI";
}
private GSSCredential getGSSCredential(String userName) throws GSSException {
Oid krb5Mechanism = new Oid(GSSAPI_OID);
GSSManager manager = GSSManager.getInstance();
GSSName name = manager.createName(userName, GSSName.NT_USER_NAME);
return manager.createCredential(name, GSSCredential.INDEFINITE_LIFETIME,
krb5Mechanism, GSSCredential.INITIATE_ONLY);
}
}
abstract class SaslAuthenticator extends Authenticator {
public static final String MONGODB_PROTOCOL = "mongodb";
SaslAuthenticator(final Mongo mongo, MongoCredential credentials) {
super(mongo, credentials);
}
public CommandResult authenticate() {
SaslClient saslClient = createSaslClient();
try {
byte[] response = (saslClient.hasInitialResponse() ? saslClient.evaluateChallenge(new byte[0]) : null);
CommandResult res = sendSaslStart(response);
res.throwOnError();
int conversationId = (Integer) res.get("conversationId");
while (! (Boolean) res.get("done")) {
response = saslClient.evaluateChallenge((byte[]) res.get("payload"));
if (response == null) {
throw new MongoException("SASL protocol error: no client response to challenge");
}
res = sendSaslContinue(conversationId, response);
res.throwOnError();
}
return res;
} catch (IOException e) {
throw new MongoException.Network("IOException authenticating the connection", e);
} finally {
try {
saslClient.dispose();
} catch (SaslException e) {
// ignore
}
}
}
protected abstract SaslClient createSaslClient();
protected abstract DB getDatabase();
private CommandResult sendSaslStart(final byte[] outToken) throws IOException {
DBObject cmd = new BasicDBObject("saslStart", 1).
append("mechanism", getMechanismName())
.append("payload", outToken != null ? outToken : new byte[0]);
return runCommand(getDatabase(), cmd);
}
private CommandResult sendSaslContinue(final int conversationId, final byte[] outToken) throws IOException {
DB adminDB = getDatabase();
DBObject cmd = new BasicDBObject("saslContinue", 1).append("conversationId", conversationId).
append("payload", outToken);
return runCommand(adminDB, cmd);
}
public abstract String getMechanismName();
}
class NativeAuthenticator extends Authenticator {
NativeAuthenticator(Mongo mongo, MongoCredential credentials) {
super(mongo, credentials);
}
@Override
public CommandResult authenticate() {
try {
DB db = mongo.getDB(credential.getSource());
CommandResult res = runCommand(db, NativeAuthenticationHelper.getNonceCommand());
res.throwOnError();
res = runCommand(db, NativeAuthenticationHelper.getAuthCommand(credential.getUserName(),
credential.getPassword(), res.getString("nonce")));
res.throwOnError();
return res;
} catch (IOException e) {
throw new MongoException.Network("IOException authenticating the connection", e);
}
}
}
abstract class Authenticator {
protected final Mongo mongo;
protected final MongoCredential credential;
Authenticator(Mongo mongo, MongoCredential credential) {
this.mongo = mongo;
this.credential = credential;
}
abstract CommandResult authenticate();
}
}