public boolean matches(Object actual) {
if (actual instanceof WriteRequest) {
WriteRequest w2 = (WriteRequest) actual;
return expected.getMessage().equals(w2.getMessage())
&& expected.getFuture().isWritten() == w2.getFuture().isWritten();
}
return false;
}
@Test
public void testWriteEmptyFile() throws Exception {
AbstractStreamWriteFilter<M> filter = createFilter();
M message = createMessage(new byte[0]);
WriteRequest writeRequest = new DefaultWriteRequest(message, new DummyWriteFuture());
NextFilter nextFilter = EasyMock.createMock(NextFilter.class);
/*
* Record expectations
*/
nextFilter.messageSent(session, writeRequest);
/*
* Replay.
*/
EasyMock.replay(nextFilter);
filter.filterWrite(nextFilter, session, writeRequest);
/*
* Verify.
*/
EasyMock.verify(nextFilter);
assertTrue(writeRequest.getFuture().isWritten());
}
/**
* Tests when the contents of the file fits into one write buffer.
*
* @throws Exception when something goes wrong
*/
@Test
public void testWriteSingleBufferFile() throws Exception {
byte[] data = new byte[] {1, 2, 3, 4};
AbstractStreamWriteFilter<M> filter = createFilter();
M message = createMessage(data);
WriteRequest writeRequest = new DefaultWriteRequest(message, new DummyWriteFuture());
NextFilter nextFilter = EasyMock.createMock(NextFilter.class);
/*
* Record expectations
*/
nextFilter.filterWrite(
EasyMock.eq(session), eqWriteRequest(new DefaultWriteRequest(IoBuffer.wrap(data))));
nextFilter.messageSent(session, writeRequest);
/*
* Replay.
*/
EasyMock.replay(nextFilter);
filter.filterWrite(nextFilter, session, writeRequest);
filter.messageSent(nextFilter, session, writeRequest);
/*
* Verify.
*/
EasyMock.verify(nextFilter);
assertTrue(writeRequest.getFuture().isWritten());
}
public void wrap(NextFilter nextFilter, WriteRequest writeRequest, IoBuffer buf)
throws AuthException {
int start = buf.position();
int len = buf.remaining() - LINE_TERMINATOR.length;
if (len == 0) throw new AuthException("Decryption failed");
// HMAC(Ki, {SeqNum, msg})[0..9]
byte[] originalMessage = new byte[len];
buf.get(originalMessage);
byte[] mac = AuthDigestMD5IoFilter.computeMACBlock(session, originalMessage, false);
// Calculate padding
int bs = encCipher.getBlockSize();
byte[] padding;
if (bs > 1) {
int pad = bs - ((len + 10) % bs); // add 10 for HMAC[0..9]
padding = new byte[pad];
for (int i = 0; i < pad; i++) padding[i] = (byte) pad;
} else padding = EMPTY_BYTE_ARRAY;
byte[] toBeEncrypted = new byte[len + padding.length + 10];
// {msg, pad, HMAC(Ki, {SeqNum, msg}[0..9])}
System.arraycopy(originalMessage, start, toBeEncrypted, 0, len);
System.arraycopy(padding, 0, toBeEncrypted, len, padding.length);
System.arraycopy(mac, 0, toBeEncrypted, len + padding.length, 10);
// CIPHER(Kc, {msg, pad, HMAC(Ki, {SeqNum, msg}[0..9])})
byte[] cipherBlock;
try {
// Do CBC (chaining) across packets
cipherBlock = encCipher.update(toBeEncrypted);
// update() can return null
if (cipherBlock == null) throw new IllegalBlockSizeException("" + toBeEncrypted.length);
} catch (IllegalBlockSizeException e) {
throw new AuthException("Invalid block size for cipher", e);
}
IoBuffer out = IoBuffer.allocate(cipherBlock.length + 2 + 4 + LINE_TERMINATOR.length);
out.put(cipherBlock);
out.put(mac, 10, 6); // messageType & sequenceNum
out.put(LINE_TERMINATOR);
out.flip();
if (out.limit()
> ((Integer) session.getAttribute(AuthDigestMD5Command.CLIENT_MAXBUF)).intValue())
throw new AuthException("Data exceeds client maxbuf capability");
nextFilter.filterWrite(session, new DefaultWriteRequest(out, writeRequest.getFuture()));
}
private void clearWriteRequestQueue(S session) {
WriteRequestQueue writeRequestQueue = session.getWriteRequestQueue();
WriteRequest req;
List<WriteRequest> failedRequests = new ArrayList<WriteRequest>();
if ((req = writeRequestQueue.poll(session)) != null) {
Object message = req.getMessage();
if (message instanceof IoBuffer) {
IoBuffer buf = (IoBuffer) message;
// The first unwritten empty buffer must be
// forwarded to the filter chain.
if (buf.hasRemaining()) {
buf.reset();
failedRequests.add(req);
} else {
IoFilterChain filterChain = session.getFilterChain();
filterChain.fireMessageSent(req);
}
} else {
failedRequests.add(req);
}
// Discard others.
while ((req = writeRequestQueue.poll(session)) != null) {
failedRequests.add(req);
}
}
// Create an exception and notify.
if (!failedRequests.isEmpty()) {
WriteToClosedSessionException cause = new WriteToClosedSessionException(failedRequests);
for (WriteRequest r : failedRequests) {
session.decreaseScheduledBytesAndMessages(r);
r.getFuture().setException(cause);
}
IoFilterChain filterChain = session.getFilterChain();
filterChain.fireExceptionCaught(cause);
}
}
/**
* Tests when the contents of the file doesn't fit into one write buffer.
*
* @throws Exception when something goes wrong
*/
@Test
public void testWriteSeveralBuffersStream() throws Exception {
AbstractStreamWriteFilter<M> filter = createFilter();
filter.setWriteBufferSize(4);
byte[] data = new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
byte[] chunk1 = new byte[] {1, 2, 3, 4};
byte[] chunk2 = new byte[] {5, 6, 7, 8};
byte[] chunk3 = new byte[] {9, 10};
M message = createMessage(data);
WriteRequest writeRequest = new DefaultWriteRequest(message, new DummyWriteFuture());
WriteRequest chunk1Request = new DefaultWriteRequest(IoBuffer.wrap(chunk1));
WriteRequest chunk2Request = new DefaultWriteRequest(IoBuffer.wrap(chunk2));
WriteRequest chunk3Request = new DefaultWriteRequest(IoBuffer.wrap(chunk3));
NextFilter nextFilter = EasyMock.createMock(NextFilter.class);
/*
* Record expectations
*/
nextFilter.filterWrite(EasyMock.eq(session), eqWriteRequest(chunk1Request));
nextFilter.filterWrite(EasyMock.eq(session), eqWriteRequest(chunk2Request));
nextFilter.filterWrite(EasyMock.eq(session), eqWriteRequest(chunk3Request));
nextFilter.messageSent(EasyMock.eq(session), eqWriteRequest(writeRequest));
/*
* Replay.
*/
EasyMock.replay(nextFilter);
filter.filterWrite(nextFilter, session, writeRequest);
filter.messageSent(nextFilter, session, chunk1Request);
filter.messageSent(nextFilter, session, chunk2Request);
filter.messageSent(nextFilter, session, chunk3Request);
/*
* Verify.
*/
EasyMock.verify(nextFilter);
assertTrue(writeRequest.getFuture().isWritten());
}
private boolean flushNow(S session, long currentTime) {
if (!session.isConnected()) {
scheduleRemove(session);
return false;
}
final boolean hasFragmentation = session.getTransportMetadata().hasFragmentation();
final WriteRequestQueue writeRequestQueue = session.getWriteRequestQueue();
// Set limitation for the number of written bytes for read-write
// fairness. I used maxReadBufferSize * 3 / 2, which yields best
// performance in my experience while not breaking fairness much.
final int maxWrittenBytes =
session.getConfig().getMaxReadBufferSize()
+ (session.getConfig().getMaxReadBufferSize() >>> 1);
int writtenBytes = 0;
WriteRequest req = null;
try {
// Clear OP_WRITE
setInterestedInWrite(session, false);
do {
// Check for pending writes.
req = session.getCurrentWriteRequest();
if (req == null) {
req = writeRequestQueue.poll(session);
if (req == null) {
break;
}
session.setCurrentWriteRequest(req);
}
int localWrittenBytes = 0;
Object message = req.getMessage();
if (message instanceof IoBuffer) {
localWrittenBytes =
writeBuffer(
session, req, hasFragmentation, maxWrittenBytes - writtenBytes, currentTime);
if ((localWrittenBytes > 0) && ((IoBuffer) message).hasRemaining()) {
// the buffer isn't empty, we re-interest it in writing
writtenBytes += localWrittenBytes;
setInterestedInWrite(session, true);
return false;
}
} else if (message instanceof FileRegion) {
localWrittenBytes =
writeFile(
session, req, hasFragmentation, maxWrittenBytes - writtenBytes, currentTime);
// Fix for Java bug on Linux
// http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5103988
// If there's still data to be written in the FileRegion,
// return 0 indicating that we need
// to pause until writing may resume.
if ((localWrittenBytes > 0) && (((FileRegion) message).getRemainingBytes() > 0)) {
writtenBytes += localWrittenBytes;
setInterestedInWrite(session, true);
return false;
}
} else {
throw new IllegalStateException(
"Don't know how to handle message of type '"
+ message.getClass().getName()
+ "'. Are you missing a protocol encoder?");
}
if (localWrittenBytes == 0) {
// Kernel buffer is full.
setInterestedInWrite(session, true);
return false;
}
writtenBytes += localWrittenBytes;
if (writtenBytes >= maxWrittenBytes) {
// Wrote too much
scheduleFlush(session);
return false;
}
} while (writtenBytes < maxWrittenBytes);
} catch (Exception e) {
if (req != null) {
req.getFuture().setException(e);
}
IoFilterChain filterChain = session.getFilterChain();
filterChain.fireExceptionCaught(e);
return false;
}
return true;
}