Java example source code file (Connection.java)
The Connection.java Java example source code/*
* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.jndi.ldap;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.InterruptedIOException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.InputStream;
import java.net.Socket;
import javax.net.ssl.SSLSocket;
import javax.naming.CommunicationException;
import javax.naming.ServiceUnavailableException;
import javax.naming.NamingException;
import javax.naming.InterruptedNamingException;
import javax.naming.ldap.Control;
import java.lang.reflect.Method;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Arrays;
import sun.misc.IOUtils;
//import javax.net.SocketFactory;
/**
* A thread that creates a connection to an LDAP server.
* After the connection, the thread reads from the connection.
* A caller can invoke methods on the instance to read LDAP responses
* and to send LDAP requests.
* <p>
* There is a one-to-one correspondence between an LdapClient and
* a Connection. Access to Connection and its methods is only via
* LdapClient with two exceptions: SASL authentication and StartTLS.
* SASL needs to access Connection's socket IO streams (in order to do encryption
* of the security layer). StartTLS needs to do replace IO streams
* and close the IO streams on nonfatal close. The code for SASL
* authentication can be treated as being the same as from LdapClient
* because the SASL code is only ever called from LdapClient, from
* inside LdapClient's synchronized authenticate() method. StartTLS is called
* directly by the application but should only occur when the underlying
* connection is quiet.
* <p>
* In terms of synchronization, worry about data structures
* used by the Connection thread because that usage might contend
* with calls by the main threads (i.e., those that call LdapClient).
* Main threads need to worry about contention with each other.
* Fields that Connection thread uses:
* inStream - synced access and update; initialized in constructor;
* referenced outside class unsync'ed (by LdapSasl) only
* when connection is quiet
* traceFile, traceTagIn, traceTagOut - no sync; debugging only
* parent - no sync; initialized in constructor; no updates
* pendingRequests - sync
* pauseLock - per-instance lock;
* paused - sync via pauseLock (pauseReader())
* Members used by main threads (LdapClient):
* host, port - unsync; read-only access for StartTLS and debug messages
* setBound(), setV3() - no sync; called only by LdapClient.authenticate(),
* which is a sync method called only when connection is "quiet"
* getMsgId() - sync
* writeRequest(), removeRequest(),findRequest(), abandonOutstandingReqs() -
* access to shared pendingRequests is sync
* writeRequest(), abandonRequest(), ldapUnbind() - access to outStream sync
* cleanup() - sync
* readReply() - access to sock sync
* unpauseReader() - (indirectly via writeRequest) sync on pauseLock
* Members used by SASL auth (main thread):
* inStream, outStream - no sync; used to construct new stream; accessed
* only when conn is "quiet" and not shared
* replaceStreams() - sync method
* Members used by StartTLS:
* inStream, outStream - no sync; used to record the existing streams;
* accessed only when conn is "quiet" and not shared
* replaceStreams() - sync method
* <p>
* Handles anonymous, simple, and SASL bind for v3; anonymous and simple
* for v2.
* %%% made public for access by LdapSasl %%%
*
* @author Vincent Ryan
* @author Rosanna Lee
* @author Jagane Sundar
*/
public final class Connection implements Runnable {
private static final boolean debug = false;
private static final int dump = 0; // > 0 r, > 1 rw
final private Thread worker; // Initialized in constructor
private boolean v3 = true; // Set in setV3()
final public String host; // used by LdapClient for generating exception messages
// used by StartTlsResponse when creating an SSL socket
final public int port; // used by LdapClient for generating exception messages
// used by StartTlsResponse when creating an SSL socket
private boolean bound = false; // Set in setBound()
// All three are initialized in constructor and read-only afterwards
private OutputStream traceFile = null;
private String traceTagIn = null;
private String traceTagOut = null;
// Initialized in constructor; read and used externally (LdapSasl);
// Updated in replaceStreams() during "quiet", unshared, period
public InputStream inStream; // must be public; used by LdapSasl
// Initialized in constructor; read and used externally (LdapSasl);
// Updated in replaceOutputStream() during "quiet", unshared, period
public OutputStream outStream; // must be public; used by LdapSasl
// Initialized in constructor; read and used externally (TLS) to
// get new IO streams; closed during cleanup
public Socket sock; // for TLS
// For processing "disconnect" unsolicited notification
// Initialized in constructor
final private LdapClient parent;
// Incremented and returned in sync getMsgId()
private int outMsgId = 0;
//
// The list of ldapRequests pending on this binding
//
// Accessed only within sync methods
private LdapRequest pendingRequests = null;
volatile IOException closureReason = null;
volatile boolean useable = true; // is Connection still useable
int readTimeout;
int connectTimeout;
// true means v3; false means v2
// Called in LdapClient.authenticate() (which is synchronized)
// when connection is "quiet" and not shared; no need to synchronize
void setV3(boolean v) {
v3 = v;
}
// A BIND request has been successfully made on this connection
// When cleaning up, remember to do an UNBIND
// Called in LdapClient.authenticate() (which is synchronized)
// when connection is "quiet" and not shared; no need to synchronize
void setBound() {
bound = true;
}
////////////////////////////////////////////////////////////////////////////
//
// Create an LDAP Binding object and bind to a particular server
//
////////////////////////////////////////////////////////////////////////////
Connection(LdapClient parent, String host, int port, String socketFactory,
int connectTimeout, int readTimeout, OutputStream trace) throws NamingException {
this.host = host;
this.port = port;
this.parent = parent;
this.readTimeout = readTimeout;
this.connectTimeout = connectTimeout;
if (trace != null) {
traceFile = trace;
traceTagIn = "<- " + host + ":" + port + "\n\n";
traceTagOut = "-> " + host + ":" + port + "\n\n";
}
//
// Connect to server
//
try {
sock = createSocket(host, port, socketFactory, connectTimeout);
if (debug) {
System.err.println("Connection: opening socket: " + host + "," + port);
}
inStream = new BufferedInputStream(sock.getInputStream());
outStream = new BufferedOutputStream(sock.getOutputStream());
} catch (InvocationTargetException e) {
Throwable realException = e.getTargetException();
// realException.printStackTrace();
CommunicationException ce =
new CommunicationException(host + ":" + port);
ce.setRootCause(realException);
throw ce;
} catch (Exception e) {
// Class.forName() seems to do more error checking
// and will throw IllegalArgumentException and such.
// That's why we need to have a catch all here and
// ignore generic exceptions.
// Also catches all IO errors generated by socket creation.
CommunicationException ce =
new CommunicationException(host + ":" + port);
ce.setRootCause(e);
throw ce;
}
worker = Obj.helper.createThread(this);
worker.setDaemon(true);
worker.start();
}
/*
* Create an InetSocketAddress using the specified hostname and port number.
*/
private Object createInetSocketAddress(String host, int port)
throws NoSuchMethodException {
try {
Class<?> inetSocketAddressClass =
Class.forName("java.net.InetSocketAddress");
Constructor<?> inetSocketAddressCons =
inetSocketAddressClass.getConstructor(new Class<?>[]{
String.class, int.class});
return inetSocketAddressCons.newInstance(new Object[]{
host, new Integer(port)});
} catch (ClassNotFoundException |
InstantiationException |
InvocationTargetException |
IllegalAccessException e) {
throw new NoSuchMethodException();
}
}
/*
* Create a Socket object using the specified socket factory and time limit.
*
* If a timeout is supplied and unconnected sockets are supported then
* an unconnected socket is created and the timeout is applied when
* connecting the socket. If a timeout is supplied but unconnected sockets
* are not supported then the timeout is ignored and a connected socket
* is created.
*/
private Socket createSocket(String host, int port, String socketFactory,
int connectTimeout) throws Exception {
Socket socket = null;
if (socketFactory != null) {
// create the factory
Class<?> socketFactoryClass = Obj.helper.loadClass(socketFactory);
Method getDefault =
socketFactoryClass.getMethod("getDefault", new Class<?>[]{});
Object factory = getDefault.invoke(null, new Object[]{});
// create the socket
Method createSocket = null;
if (connectTimeout > 0) {
try {
createSocket = socketFactoryClass.getMethod("createSocket",
new Class<?>[]{});
Method connect = Socket.class.getMethod("connect",
new Class<?>[]{Class.forName("java.net.SocketAddress"),
int.class});
Object endpoint = createInetSocketAddress(host, port);
// unconnected socket
socket =
(Socket)createSocket.invoke(factory, new Object[]{});
if (debug) {
System.err.println("Connection: creating socket with " +
"a timeout using supplied socket factory");
}
// connected socket
connect.invoke(socket, new Object[]{
endpoint, new Integer(connectTimeout)});
} catch (NoSuchMethodException e) {
// continue (but ignore connectTimeout)
}
}
if (socket == null) {
createSocket = socketFactoryClass.getMethod("createSocket",
new Class<?>[]{String.class, int.class});
if (debug) {
System.err.println("Connection: creating socket using " +
"supplied socket factory");
}
// connected socket
socket = (Socket) createSocket.invoke(factory,
new Object[]{host, new Integer(port)});
}
} else {
if (connectTimeout > 0) {
try {
Constructor<Socket> socketCons =
Socket.class.getConstructor(new Class<?>[]{});
Method connect = Socket.class.getMethod("connect",
new Class<?>[]{Class.forName("java.net.SocketAddress"),
int.class});
Object endpoint = createInetSocketAddress(host, port);
socket = socketCons.newInstance(new Object[]{});
if (debug) {
System.err.println("Connection: creating socket with " +
"a timeout");
}
connect.invoke(socket, new Object[]{
endpoint, new Integer(connectTimeout)});
} catch (NoSuchMethodException e) {
// continue (but ignore connectTimeout)
}
}
if (socket == null) {
if (debug) {
System.err.println("Connection: creating socket");
}
// connected socket
socket = new Socket(host, port);
}
}
// For LDAP connect timeouts on LDAP over SSL connections must treat
// the SSL handshake following socket connection as part of the timeout.
// So explicitly set a socket read timeout, trigger the SSL handshake,
// then reset the timeout.
if (connectTimeout > 0 && socket instanceof SSLSocket) {
SSLSocket sslSocket = (SSLSocket) socket;
int socketTimeout = sslSocket.getSoTimeout();
sslSocket.setSoTimeout(connectTimeout); // reuse full timeout value
sslSocket.startHandshake();
sslSocket.setSoTimeout(socketTimeout);
}
return socket;
}
////////////////////////////////////////////////////////////////////////////
//
// Methods to IO to the LDAP server
//
////////////////////////////////////////////////////////////////////////////
synchronized int getMsgId() {
return ++outMsgId;
}
LdapRequest writeRequest(BerEncoder ber, int msgId) throws IOException {
return writeRequest(ber, msgId, false /* pauseAfterReceipt */, -1);
}
LdapRequest writeRequest(BerEncoder ber, int msgId,
boolean pauseAfterReceipt) throws IOException {
return writeRequest(ber, msgId, pauseAfterReceipt, -1);
}
LdapRequest writeRequest(BerEncoder ber, int msgId,
boolean pauseAfterReceipt, int replyQueueCapacity) throws IOException {
LdapRequest req =
new LdapRequest(msgId, pauseAfterReceipt, replyQueueCapacity);
addRequest(req);
if (traceFile != null) {
Ber.dumpBER(traceFile, traceTagOut, ber.getBuf(), 0, ber.getDataLen());
}
// unpause reader so that it can get response
// NOTE: Must do this before writing request, otherwise might
// create a race condition where the writer unblocks its own response
unpauseReader();
if (debug) {
System.err.println("Writing request to: " + outStream);
}
try {
synchronized (this) {
outStream.write(ber.getBuf(), 0, ber.getDataLen());
outStream.flush();
}
} catch (IOException e) {
cleanup(null, true);
throw (closureReason = e); // rethrow
}
return req;
}
/**
* Reads a reply; waits until one is ready.
*/
BerDecoder readReply(LdapRequest ldr)
throws IOException, NamingException {
BerDecoder rber;
boolean waited = false;
while (((rber = ldr.getReplyBer()) == null) && !waited) {
try {
// If socket closed, don't even try
synchronized (this) {
if (sock == null) {
throw new ServiceUnavailableException(host + ":" + port +
"; socket closed");
}
}
synchronized (ldr) {
// check if condition has changed since our last check
rber = ldr.getReplyBer();
if (rber == null) {
if (readTimeout > 0) { // Socket read timeout is specified
// will be woken up before readTimeout only if reply is
// available
ldr.wait(readTimeout);
waited = true;
} else {
ldr.wait(15 * 1000); // 15 second timeout
}
} else {
break;
}
}
} catch (InterruptedException ex) {
throw new InterruptedNamingException(
"Interrupted during LDAP operation");
}
}
if ((rber == null) && waited) {
removeRequest(ldr);
throw new NamingException("LDAP response read timed out, timeout used:"
+ readTimeout + "ms." );
}
return rber;
}
////////////////////////////////////////////////////////////////////////////
//
// Methods to add, find, delete, and abandon requests made to server
//
////////////////////////////////////////////////////////////////////////////
private synchronized void addRequest(LdapRequest ldapRequest) {
LdapRequest ldr = pendingRequests;
if (ldr == null) {
pendingRequests = ldapRequest;
ldapRequest.next = null;
} else {
ldapRequest.next = pendingRequests;
pendingRequests = ldapRequest;
}
}
synchronized LdapRequest findRequest(int msgId) {
LdapRequest ldr = pendingRequests;
while (ldr != null) {
if (ldr.msgId == msgId) {
return ldr;
}
ldr = ldr.next;
}
return null;
}
synchronized void removeRequest(LdapRequest req) {
LdapRequest ldr = pendingRequests;
LdapRequest ldrprev = null;
while (ldr != null) {
if (ldr == req) {
ldr.cancel();
if (ldrprev != null) {
ldrprev.next = ldr.next;
} else {
pendingRequests = ldr.next;
}
ldr.next = null;
}
ldrprev = ldr;
ldr = ldr.next;
}
}
void abandonRequest(LdapRequest ldr, Control[] reqCtls) {
// Remove from queue
removeRequest(ldr);
BerEncoder ber = new BerEncoder(256);
int abandonMsgId = getMsgId();
//
// build the abandon request.
//
try {
ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);
ber.encodeInt(abandonMsgId);
ber.encodeInt(ldr.msgId, LdapClient.LDAP_REQ_ABANDON);
if (v3) {
LdapClient.encodeControls(ber, reqCtls);
}
ber.endSeq();
if (traceFile != null) {
Ber.dumpBER(traceFile, traceTagOut, ber.getBuf(), 0,
ber.getDataLen());
}
synchronized (this) {
outStream.write(ber.getBuf(), 0, ber.getDataLen());
outStream.flush();
}
} catch (IOException ex) {
//System.err.println("ldap.abandon: " + ex);
}
// Don't expect any response for the abandon request.
}
synchronized void abandonOutstandingReqs(Control[] reqCtls) {
LdapRequest ldr = pendingRequests;
while (ldr != null) {
abandonRequest(ldr, reqCtls);
pendingRequests = ldr = ldr.next;
}
}
////////////////////////////////////////////////////////////////////////////
//
// Methods to unbind from server and clear up resources when object is
// destroyed.
//
////////////////////////////////////////////////////////////////////////////
private void ldapUnbind(Control[] reqCtls) {
BerEncoder ber = new BerEncoder(256);
int unbindMsgId = getMsgId();
//
// build the unbind request.
//
try {
ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);
ber.encodeInt(unbindMsgId);
// IMPLICIT TAGS
ber.encodeByte(LdapClient.LDAP_REQ_UNBIND);
ber.encodeByte(0);
if (v3) {
LdapClient.encodeControls(ber, reqCtls);
}
ber.endSeq();
if (traceFile != null) {
Ber.dumpBER(traceFile, traceTagOut, ber.getBuf(),
0, ber.getDataLen());
}
synchronized (this) {
outStream.write(ber.getBuf(), 0, ber.getDataLen());
outStream.flush();
}
} catch (IOException ex) {
//System.err.println("ldap.unbind: " + ex);
}
// Don't expect any response for the unbind request.
}
/**
* @param reqCtls Possibly null request controls that accompanies the
* abandon and unbind LDAP request.
* @param notifyParent true means to call parent LdapClient back, notifying
* it that the connection has been closed; false means not to notify
* parent. If LdapClient invokes cleanup(), notifyParent should be set to
* false because LdapClient already knows that it is closing
* the connection. If Connection invokes cleanup(), notifyParent should be
* set to true because LdapClient needs to know about the closure.
*/
void cleanup(Control[] reqCtls, boolean notifyParent) {
boolean nparent = false;
synchronized (this) {
useable = false;
if (sock != null) {
if (debug) {
System.err.println("Connection: closing socket: " + host + "," + port);
}
try {
if (!notifyParent) {
abandonOutstandingReqs(reqCtls);
}
if (bound) {
ldapUnbind(reqCtls);
}
} finally {
try {
outStream.flush();
sock.close();
unpauseReader();
} catch (IOException ie) {
if (debug)
System.err.println("Connection: problem closing socket: " + ie);
}
if (!notifyParent) {
LdapRequest ldr = pendingRequests;
while (ldr != null) {
ldr.cancel();
ldr = ldr.next;
}
}
sock = null;
}
nparent = notifyParent;
}
if (nparent) {
LdapRequest ldr = pendingRequests;
while (ldr != null) {
synchronized (ldr) {
ldr.notify();
ldr = ldr.next;
}
}
}
}
if (nparent) {
parent.processConnectionClosure();
}
}
// Assume everything is "quiet"
// "synchronize" might lead to deadlock so don't synchronize method
// Use streamLock instead for synchronizing update to stream
synchronized public void replaceStreams(InputStream newIn, OutputStream newOut) {
if (debug) {
System.err.println("Replacing " + inStream + " with: " + newIn);
System.err.println("Replacing " + outStream + " with: " + newOut);
}
inStream = newIn;
// Cleanup old stream
try {
outStream.flush();
} catch (IOException ie) {
if (debug)
System.err.println("Connection: cannot flush outstream: " + ie);
}
// Replace stream
outStream = newOut;
}
/**
* Used by Connection thread to read inStream into a local variable.
* This ensures that there is no contention between the main thread
* and the Connection thread when the main thread updates inStream.
*/
synchronized private InputStream getInputStream() {
return inStream;
}
////////////////////////////////////////////////////////////////////////////
//
// Code for pausing/unpausing the reader thread ('worker')
//
////////////////////////////////////////////////////////////////////////////
/*
* The main idea is to mark requests that need the reader thread to
* pause after getting the response. When the reader thread gets the response,
* it waits on a lock instead of returning to the read(). The next time a
* request is sent, the reader is automatically unblocked if necessary.
* Note that the reader must be unblocked BEFORE the request is sent.
* Otherwise, there is a race condition where the request is sent and
* the reader thread might read the response and be unblocked
* by writeRequest().
*
* This pause gives the main thread (StartTLS or SASL) an opportunity to
* update the reader's state (e.g., its streams) if necessary.
* The assumption is that the connection will remain quiet during this pause
* (i.e., no intervening requests being sent).
*<p>
* For dealing with StartTLS close,
* when the read() exits either due to EOF or an exception,
* the reader thread checks whether there is a new stream to read from.
* If so, then it reattempts the read. Otherwise, the EOF or exception
* is processed and the reader thread terminates.
* In a StartTLS close, the client first replaces the SSL IO streams with
* plain ones and then closes the SSL socket.
* If the reader thread attempts to read, or was reading, from
* the SSL socket (that is, it got to the read BEFORE replaceStreams()),
* the SSL socket close will cause the reader thread to
* get an EOF/exception and reexamine the input stream.
* If the reader thread sees a new stream, it reattempts the read.
* If the underlying socket is still alive, then the new read will succeed.
* If the underlying socket has been closed also, then the new read will
* fail and the reader thread exits.
* If the reader thread attempts to read, or was reading, from the plain
* socket (that is, it got to the read AFTER replaceStreams()), the
* SSL socket close will have no effect on the reader thread.
*
* The check for new stream is made only
* in the first attempt at reading a BER buffer; the reader should
* never be in midst of reading a buffer when a nonfatal close occurs.
* If this occurs, then the connection is in an inconsistent state and
* the safest thing to do is to shut it down.
*/
private Object pauseLock = new Object(); // lock for reader to wait on while paused
private boolean paused = false; // paused state of reader
/*
* Unpauses reader thread if it was paused
*/
private void unpauseReader() throws IOException {
synchronized (pauseLock) {
if (paused) {
if (debug) {
System.err.println("Unpausing reader; read from: " +
inStream);
}
paused = false;
pauseLock.notify();
}
}
}
/*
* Pauses reader so that it stops reading from the input stream.
* Reader blocks on pauseLock instead of read().
* MUST be called from within synchronized (pauseLock) clause.
*/
private void pauseReader() throws IOException {
if (debug) {
System.err.println("Pausing reader; was reading from: " +
inStream);
}
paused = true;
try {
while (paused) {
pauseLock.wait(); // notified by unpauseReader
}
} catch (InterruptedException e) {
throw new InterruptedIOException(
"Pause/unpause reader has problems.");
}
}
////////////////////////////////////////////////////////////////////////////
//
// The LDAP Binding thread. It does the mux/demux of multiple requests
// on the same TCP connection.
//
////////////////////////////////////////////////////////////////////////////
public void run() {
byte inbuf[]; // Buffer for reading incoming bytes
int inMsgId; // Message id of incoming response
int bytesread; // Number of bytes in inbuf
int br; // Temp; number of bytes read from stream
int offset; // Offset of where to store bytes in inbuf
int seqlen; // Length of ASN sequence
int seqlenlen; // Number of sequence length bytes
boolean eos; // End of stream
BerDecoder retBer; // Decoder for ASN.1 BER data from inbuf
InputStream in = null;
try {
while (true) {
try {
// type and length (at most 128 octets for long form)
inbuf = new byte[129];
offset = 0;
seqlen = 0;
seqlenlen = 0;
in = getInputStream();
// check that it is the beginning of a sequence
bytesread = in.read(inbuf, offset, 1);
if (bytesread < 0) {
if (in != getInputStream()) {
continue; // a new stream to try
} else {
break; // EOF
}
}
if (inbuf[offset++] != (Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR))
continue;
// get length of sequence
bytesread = in.read(inbuf, offset, 1);
if (bytesread < 0)
break; // EOF
seqlen = inbuf[offset++];
// if high bit is on, length is encoded in the
// subsequent length bytes and the number of length bytes
// is equal to & 0x80 (i.e. length byte with high bit off).
if ((seqlen & 0x80) == 0x80) {
seqlenlen = seqlen & 0x7f; // number of length bytes
bytesread = 0;
eos = false;
// Read all length bytes
while (bytesread < seqlenlen) {
br = in.read(inbuf, offset+bytesread,
seqlenlen-bytesread);
if (br < 0) {
eos = true;
break; // EOF
}
bytesread += br;
}
// end-of-stream reached before length bytes are read
if (eos)
break; // EOF
// Add contents of length bytes to determine length
seqlen = 0;
for( int i = 0; i < seqlenlen; i++) {
seqlen = (seqlen << 8) + (inbuf[offset+i] & 0xff);
}
offset += bytesread;
}
// read in seqlen bytes
byte[] left = IOUtils.readFully(in, seqlen, false);
inbuf = Arrays.copyOf(inbuf, offset + left.length);
System.arraycopy(left, 0, inbuf, offset, left.length);
offset += left.length;
/*
if (dump > 0) {
System.err.println("seqlen: " + seqlen);
System.err.println("bufsize: " + offset);
System.err.println("bytesleft: " + bytesleft);
System.err.println("bytesread: " + bytesread);
}
*/
try {
retBer = new BerDecoder(inbuf, 0, offset);
if (traceFile != null) {
Ber.dumpBER(traceFile, traceTagIn, inbuf, 0, offset);
}
retBer.parseSeq(null);
inMsgId = retBer.parseInt();
retBer.reset(); // reset offset
boolean needPause = false;
if (inMsgId == 0) {
// Unsolicited Notification
parent.processUnsolicited(retBer);
} else {
LdapRequest ldr = findRequest(inMsgId);
if (ldr != null) {
/**
* Grab pauseLock before making reply available
* to ensure that reader goes into paused state
* before writer can attempt to unpause reader
*/
synchronized (pauseLock) {
needPause = ldr.addReplyBer(retBer);
if (needPause) {
/*
* Go into paused state; release
* pauseLock
*/
pauseReader();
}
// else release pauseLock
}
} else {
// System.err.println("Cannot find" +
// "LdapRequest for " + inMsgId);
}
}
} catch (Ber.DecodeException e) {
//System.err.println("Cannot parse Ber");
}
} catch (IOException ie) {
if (debug) {
System.err.println("Connection: Inside Caught " + ie);
ie.printStackTrace();
}
if (in != getInputStream()) {
// A new stream to try
// Go to top of loop and continue
} else {
if (debug) {
System.err.println("Connection: rethrowing " + ie);
}
throw ie; // rethrow exception
}
}
}
if (debug) {
System.err.println("Connection: end-of-stream detected: "
+ in);
}
} catch (IOException ex) {
if (debug) {
System.err.println("Connection: Caught " + ex);
}
closureReason = ex;
} finally {
cleanup(null, true); // cleanup
}
if (debug) {
System.err.println("Connection: Thread Exiting");
}
}
// This code must be uncommented to run the LdapAbandonTest.
/*public void sendSearchReqs(String dn, int numReqs) {
int i;
String attrs[] = null;
for(i = 1; i <= numReqs; i++) {
BerEncoder ber = new BerEncoder(2048);
try {
ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);
ber.encodeInt(i);
ber.beginSeq(LdapClient.LDAP_REQ_SEARCH);
ber.encodeString(dn == null ? "" : dn);
ber.encodeInt(0, LdapClient.LBER_ENUMERATED);
ber.encodeInt(3, LdapClient.LBER_ENUMERATED);
ber.encodeInt(0);
ber.encodeInt(0);
ber.encodeBoolean(true);
LdapClient.encodeFilter(ber, "");
ber.beginSeq(Ber.ASN_SEQUENCE | Ber.ASN_CONSTRUCTOR);
ber.encodeStringArray(attrs);
ber.endSeq();
ber.endSeq();
ber.endSeq();
writeRequest(ber, i);
//System.err.println("wrote request " + i);
} catch (Exception ex) {
//System.err.println("ldap.search: Caught " + ex + " building req");
}
}
} */
}
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