1 /*
2 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.incubator.http.internal.frame;
27
28 import jdk.incubator.http.internal.common.Log;
29 import jdk.incubator.http.internal.common.Utils;
30
31 import java.io.IOException;
32 import java.lang.System.Logger.Level;
33 import java.nio.ByteBuffer;
34 import java.util.ArrayDeque;
35 import java.util.ArrayList;
36 import java.util.List;
37 import java.util.Queue;
38
39 /**
40 * Frames Decoder
41 * <p>
42 * collect buffers until frame decoding is possible,
43 * all decoded frames are passed to the FrameProcessor callback in order of decoding.
44 *
45 * It's a stateful class due to the fact that FramesDecoder stores buffers inside.
46 * Should be allocated only the single instance per connection.
47 */
48 public class FramesDecoder {
49
50 static final boolean DEBUG = Utils.DEBUG; // Revisit: temporary dev flag.
51 static final System.Logger DEBUG_LOGGER =
52 Utils.getDebugLogger("FramesDecoder"::toString, DEBUG);
53
54 @FunctionalInterface
55 public interface FrameProcessor {
56 void processFrame(Http2Frame frame) throws IOException;
57 }
264 byte[] bytes = new byte[n];
265 int offset = 0;
266 while (n > 0) {
267 int length = Math.min(n, currentBuffer.remaining());
268 currentBuffer.get(bytes, offset, length);
269 offset += length;
270 n -= length;
271 nextBuffer();
272 }
273 return bytes;
274
275 }
276
277 private List<ByteBuffer> getBuffers(boolean isDataFrame, int bytecount) {
278 List<ByteBuffer> res = new ArrayList<>();
279 while (bytecount > 0) {
280 int remaining = currentBuffer.remaining();
281 int extract = Math.min(remaining, bytecount);
282 ByteBuffer extractedBuf;
283 if (isDataFrame) {
284 extractedBuf = Utils.slice(currentBuffer, extract);
285 slicedToDataFrame = true;
286 } else {
287 // Header frames here
288 // HPACK decoding should performed under lock and immediately after frame decoding.
289 // in that case it is safe to release original buffer,
290 // because of sliced buffer has a very short life
291 extractedBuf = Utils.slice(currentBuffer, extract);
292 }
293 res.add(extractedBuf);
294 bytecount -= extract;
295 nextBuffer();
296 }
297 return res;
298 }
299
300 public void close(String msg) {
301 closed = true;
302 tailBuffers.clear();
303 int bytes = tailSize;
304 ByteBuffer b = currentBuffer;
305 if (b != null) {
306 bytes += b.remaining();
307 b.position(b.limit());
308 }
309 tailSize = 0;
310 currentBuffer = null;
311 DEBUG_LOGGER.log(Level.DEBUG, "closed %s, ignoring %d bytes", msg, bytes);
502 return new MalformedFrame(ErrorFrame.FRAME_SIZE_ERROR,
503 "PingFrame length is "+ frameLength+", expected 8");
504 }
505 return new PingFrame(flags, getBytes(8));
506 }
507
508 private Http2Frame parseGoAwayFrame(int frameLength, int streamid, int flags) {
509 // only zero stream; no flags
510 if (streamid != 0) {
511 return new MalformedFrame(ErrorFrame.PROTOCOL_ERROR,
512 "non-zero streamId for GoAwayFrame");
513 }
514 if (frameLength < 8) {
515 return new MalformedFrame(ErrorFrame.FRAME_SIZE_ERROR,
516 "Invalid GoAway frame size");
517 }
518 int lastStream = getInt() & 0x7fffffff;
519 int errorCode = getInt();
520 byte[] debugData = getBytes(frameLength - 8);
521 if (debugData.length > 0) {
522 Log.logError("GoAway debugData " + new String(debugData));
523 }
524 return new GoAwayFrame(lastStream, errorCode, debugData);
525 }
526
527 private Http2Frame parseWindowUpdateFrame(int frameLength, int streamid, int flags) {
528 // any stream; no flags
529 if(frameLength != 4) {
530 return new MalformedFrame(ErrorFrame.FRAME_SIZE_ERROR,
531 "WindowUpdateFrame length is "+ frameLength+", expected 4");
532 }
533 return new WindowUpdateFrame(streamid, getInt() & 0x7fffffff);
534 }
535
536 private Http2Frame parseContinuationFrame(int frameLength, int streamid, int flags) {
537 // non-zero stream;
538 if (streamid == 0) {
539 return new MalformedFrame(ErrorFrame.PROTOCOL_ERROR,
540 "zero streamId for ContinuationFrame");
541 }
542 return new ContinuationFrame(streamid, flags, getBuffers(false, frameLength));
| 1 /*
2 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.internal.net.http.frame;
27
28 import java.io.IOException;
29 import java.lang.System.Logger.Level;
30 import java.nio.ByteBuffer;
31 import java.util.ArrayDeque;
32 import java.util.ArrayList;
33 import java.util.List;
34 import jdk.internal.net.http.common.Log;
35 import jdk.internal.net.http.common.Utils;
36 import static java.nio.charset.StandardCharsets.UTF_8;
37
38 /**
39 * Frames Decoder
40 * <p>
41 * collect buffers until frame decoding is possible,
42 * all decoded frames are passed to the FrameProcessor callback in order of decoding.
43 *
44 * It's a stateful class due to the fact that FramesDecoder stores buffers inside.
45 * Should be allocated only the single instance per connection.
46 */
47 public class FramesDecoder {
48
49 static final boolean DEBUG = Utils.DEBUG; // Revisit: temporary dev flag.
50 static final System.Logger DEBUG_LOGGER =
51 Utils.getDebugLogger("FramesDecoder"::toString, DEBUG);
52
53 @FunctionalInterface
54 public interface FrameProcessor {
55 void processFrame(Http2Frame frame) throws IOException;
56 }
263 byte[] bytes = new byte[n];
264 int offset = 0;
265 while (n > 0) {
266 int length = Math.min(n, currentBuffer.remaining());
267 currentBuffer.get(bytes, offset, length);
268 offset += length;
269 n -= length;
270 nextBuffer();
271 }
272 return bytes;
273
274 }
275
276 private List<ByteBuffer> getBuffers(boolean isDataFrame, int bytecount) {
277 List<ByteBuffer> res = new ArrayList<>();
278 while (bytecount > 0) {
279 int remaining = currentBuffer.remaining();
280 int extract = Math.min(remaining, bytecount);
281 ByteBuffer extractedBuf;
282 if (isDataFrame) {
283 extractedBuf = Utils.sliceWithLimitedCapacity(currentBuffer, extract)
284 .asReadOnlyBuffer();
285 slicedToDataFrame = true;
286 } else {
287 // Header frames here
288 // HPACK decoding should performed under lock and immediately after frame decoding.
289 // in that case it is safe to release original buffer,
290 // because of sliced buffer has a very short life
291 extractedBuf = Utils.sliceWithLimitedCapacity(currentBuffer, extract);
292 }
293 res.add(extractedBuf);
294 bytecount -= extract;
295 nextBuffer();
296 }
297 return res;
298 }
299
300 public void close(String msg) {
301 closed = true;
302 tailBuffers.clear();
303 int bytes = tailSize;
304 ByteBuffer b = currentBuffer;
305 if (b != null) {
306 bytes += b.remaining();
307 b.position(b.limit());
308 }
309 tailSize = 0;
310 currentBuffer = null;
311 DEBUG_LOGGER.log(Level.DEBUG, "closed %s, ignoring %d bytes", msg, bytes);
502 return new MalformedFrame(ErrorFrame.FRAME_SIZE_ERROR,
503 "PingFrame length is "+ frameLength+", expected 8");
504 }
505 return new PingFrame(flags, getBytes(8));
506 }
507
508 private Http2Frame parseGoAwayFrame(int frameLength, int streamid, int flags) {
509 // only zero stream; no flags
510 if (streamid != 0) {
511 return new MalformedFrame(ErrorFrame.PROTOCOL_ERROR,
512 "non-zero streamId for GoAwayFrame");
513 }
514 if (frameLength < 8) {
515 return new MalformedFrame(ErrorFrame.FRAME_SIZE_ERROR,
516 "Invalid GoAway frame size");
517 }
518 int lastStream = getInt() & 0x7fffffff;
519 int errorCode = getInt();
520 byte[] debugData = getBytes(frameLength - 8);
521 if (debugData.length > 0) {
522 Log.logError("GoAway debugData " + new String(debugData, UTF_8));
523 }
524 return new GoAwayFrame(lastStream, errorCode, debugData);
525 }
526
527 private Http2Frame parseWindowUpdateFrame(int frameLength, int streamid, int flags) {
528 // any stream; no flags
529 if(frameLength != 4) {
530 return new MalformedFrame(ErrorFrame.FRAME_SIZE_ERROR,
531 "WindowUpdateFrame length is "+ frameLength+", expected 4");
532 }
533 return new WindowUpdateFrame(streamid, getInt() & 0x7fffffff);
534 }
535
536 private Http2Frame parseContinuationFrame(int frameLength, int streamid, int flags) {
537 // non-zero stream;
538 if (streamid == 0) {
539 return new MalformedFrame(ErrorFrame.PROTOCOL_ERROR,
540 "zero streamId for ContinuationFrame");
541 }
542 return new ContinuationFrame(streamid, flags, getBuffers(false, frameLength));
|