Fixes #7625 - HTTP/3 error against www.google.com

jetty-http3/http3-client/src/main/java/org/eclipse/jetty/http3/client/internal/ClientHTTP3Session.java

@@ -92,6 +92,11 @@ public QpackDecoder getQpackDecoder()
         return decoder;
     }
 
+    public QpackEncoder getQpackEncoder()
+    {
+        return encoder;
+    }
+
     public HTTP3SessionClient getSessionClient()
     {
         return session;

jetty-http3/http3-client/src/main/java/org/eclipse/jetty/http3/client/internal/HTTP3SessionClient.java

@@ -146,4 +146,24 @@ protected GoAwayFrame newGoAwayFrame(boolean graceful)
             return GoAwayFrame.CLIENT_GRACEFUL;
         return super.newGoAwayFrame(graceful);
     }
+
+    @Override
+    protected void onSettingMaxTableCapacity(long value)
+    {
+        getProtocolSession().getQpackEncoder().setCapacity((int)value);
+    }
+
+    @Override
+    protected void onSettingMaxFieldSectionSize(long value)
+    {
+        getProtocolSession().getQpackDecoder().setMaxHeaderSize((int)value);
+    }
+
+    @Override
+    protected void onSettingMaxBlockedStreams(long value)
+    {
+        ClientHTTP3Session session = getProtocolSession();
+        session.getQpackDecoder().setMaxBlockedStreams((int)value);
+        session.getQpackEncoder().setMaxBlockedStreams((int)value);
+    }
 }

jetty-http3/http3-common/src/main/java/org/eclipse/jetty/http3/frames/SettingsFrame.java

@@ -17,11 +17,18 @@
 
 public class SettingsFrame extends Frame
 {
+    public static final long MAX_TABLE_CAPACITY = 0x01;
     public static final long MAX_FIELD_SECTION_SIZE = 0x06;
+    public static final long MAX_BLOCKED_STREAMS = 0x07;
 
     public static boolean isReserved(long key)
     {
-        return key >= 0 && key <= 5;
+        if (key == MAX_TABLE_CAPACITY ||
+            key == MAX_FIELD_SECTION_SIZE ||
+            key == MAX_BLOCKED_STREAMS)
+            return false;
+        // Other HTTP/2 settings are reserved and must not be sent/received.
+        return key >= 0x00 && key <= 0x05;
     }
 
     private final Map<Long, Long> settings;

jetty-http3/http3-common/src/main/java/org/eclipse/jetty/http3/internal/HTTP3Session.java

@@ -371,9 +371,32 @@ public void onSettings(SettingsFrame frame)
     {
         if (LOG.isDebugEnabled())
             LOG.debug("received {} on {}", frame, this);
+
+        frame.getSettings().forEach((key, value) ->
+        {
+            if (key == SettingsFrame.MAX_TABLE_CAPACITY)
+                onSettingMaxTableCapacity(value);
+            else if (key == SettingsFrame.MAX_FIELD_SECTION_SIZE)
+                onSettingMaxFieldSectionSize(value);
+            else if (key == SettingsFrame.MAX_BLOCKED_STREAMS)
+                onSettingMaxBlockedStreams(value);
+        });
+
         notifySettings(frame);
     }
 
+    protected void onSettingMaxTableCapacity(long value)
+    {
+    }
+
+    protected void onSettingMaxFieldSectionSize(long value)
+    {
+    }
+
+    protected void onSettingMaxBlockedStreams(long value)
+    {
+    }
+
     private void notifySettings(SettingsFrame frame)
     {
         try

jetty-http3/http3-qpack/src/main/java/org/eclipse/jetty/http3/qpack/QpackDecoder.java

@@ -50,7 +50,8 @@ public class QpackDecoder implements Dumpable
     private final List<EncodedFieldSection> _encodedFieldSections = new ArrayList<>();
     private final NBitIntegerParser _integerDecoder = new NBitIntegerParser();
     private final InstructionHandler _instructionHandler = new InstructionHandler();
-    private final int _maxHeaderSize;
+    private int _maxHeaderSize;
+    private int _maxBlockedStreams;
 
     private static class MetaDataNotification
     {
@@ -87,6 +88,27 @@ QpackContext getQpackContext()
         return _context;
     }
 
+    public int getMaxHeaderSize()
+    {
+        return _maxHeaderSize;
+    }
+
+    public void setMaxHeaderSize(int maxHeaderSize)
+    {
+        _maxHeaderSize = maxHeaderSize;
+    }
+
+    public int getMaxBlockedStreams()
+    {
+        // TODO: implement logic about blocked streams by calling this method.
+        return _maxBlockedStreams;
+    }
+
+    public void setMaxBlockedStreams(int maxBlockedStreams)
+    {
+        _maxBlockedStreams = maxBlockedStreams;
+    }
+
     public interface Handler
     {
         void onMetaData(long streamId, MetaData metadata);
@@ -110,7 +132,8 @@ public boolean decode(long streamId, ByteBuffer buffer, Handler handler) throws
             LOG.debug("Decoding: streamId={}, buffer={}", streamId, BufferUtil.toDetailString(buffer));
 
         // If the buffer is big, don't even think about decoding it
-        if (buffer.remaining() > _maxHeaderSize)
+        int maxHeaderSize = getMaxHeaderSize();
+        if (buffer.remaining() > maxHeaderSize)
             throw new QpackException.SessionException(QPACK_DECOMPRESSION_FAILED, "header_too_large");
 
         _integerDecoder.setPrefix(8);
@@ -139,7 +162,7 @@ public boolean decode(long streamId, ByteBuffer buffer, Handler handler) throws
             // Decode it straight away if we can, otherwise add it to the list of EncodedFieldSections.
             if (requiredInsertCount <= insertCount)
             {
-                MetaData metaData = encodedFieldSection.decode(_context, _maxHeaderSize);
+                MetaData metaData = encodedFieldSection.decode(_context, maxHeaderSize);
                 if (LOG.isDebugEnabled())
                     LOG.debug("Decoded: streamId={}, metadata={}", streamId, metaData);
                 _metaDataNotifications.add(new MetaDataNotification(streamId, metaData, handler));

jetty-http3/http3-qpack/src/main/java/org/eclipse/jetty/http3/qpack/QpackEncoder.java

@@ -91,7 +91,7 @@ public class QpackEncoder implements Dumpable
     private final List<Instruction> _instructions = new ArrayList<>();
     private final Instruction.Handler _handler;
     private final QpackContext _context;
-    private final int _maxBlockedStreams;
+    private int _maxBlockedStreams;
     private final Map<Long, StreamInfo> _streamInfoMap = new HashMap<>();
     private final EncoderInstructionParser _parser;
     private final InstructionHandler _instructionHandler = new InstructionHandler();
@@ -106,6 +106,21 @@ public QpackEncoder(Instruction.Handler handler, int maxBlockedStreams)
         _parser = new EncoderInstructionParser(_instructionHandler);
     }
 
+    public int getMaxBlockedStreams()
+    {
+        return _maxBlockedStreams;
+    }
+
+    public void setMaxBlockedStreams(int maxBlockedStreams)
+    {
+        _maxBlockedStreams = maxBlockedStreams;
+    }
+
+    public int getCapacity()
+    {
+        return _context.getDynamicTable().getCapacity();
+    }
+
     /**
      * Set the capacity of the DynamicTable and send a instruction to set the capacity on the remote Decoder.
      *
@@ -411,7 +426,7 @@ private boolean referenceEntry(Entry entry, StreamInfo streamInfo)
             return true;
         }
 
-        if (_blockedStreams < _maxBlockedStreams)
+        if (_blockedStreams < getMaxBlockedStreams())
         {
             _blockedStreams++;
             sectionInfo.block();

jetty-http3/http3-server/src/main/java/org/eclipse/jetty/http3/server/internal/HTTP3SessionServer.java

@@ -95,6 +95,26 @@ protected GoAwayFrame newGoAwayFrame(boolean graceful)
         return super.newGoAwayFrame(graceful);
     }
 
+    @Override
+    protected void onSettingMaxTableCapacity(long value)
+    {
+        getProtocolSession().getQpackEncoder().setCapacity((int)value);
+    }
+
+    @Override
+    protected void onSettingMaxFieldSectionSize(long value)
+    {
+        getProtocolSession().getQpackDecoder().setMaxHeaderSize((int)value);
+    }
+
+    @Override
+    protected void onSettingMaxBlockedStreams(long value)
+    {
+        ServerHTTP3Session session = getProtocolSession();
+        session.getQpackDecoder().setMaxBlockedStreams((int)value);
+        session.getQpackEncoder().setMaxBlockedStreams((int)value);
+    }
+
     private void notifyAccept()
     {
         Server.Listener listener = getListener();

jetty-http3/http3-server/src/main/java/org/eclipse/jetty/http3/server/internal/ServerHTTP3Session.java

@@ -91,6 +91,11 @@ public QpackDecoder getQpackDecoder()
         return decoder;
     }
 
+    public QpackEncoder getQpackEncoder()
+    {
+        return encoder;
+    }
+
     public HTTP3SessionServer getSessionServer()
     {
         return session;

jetty-http3/http3-tests/src/test/java/org/eclipse/jetty/http3/tests/ClientServerTest.java

@@ -14,6 +14,7 @@
 package org.eclipse.jetty.http3.tests;
 
 import java.nio.ByteBuffer;
+import java.util.AbstractMap;
 import java.util.Map;
 import java.util.Random;
 import java.util.concurrent.CountDownLatch;
@@ -34,13 +35,15 @@
 import org.eclipse.jetty.http3.internal.HTTP3ErrorCode;
 import org.eclipse.jetty.http3.internal.HTTP3Session;
 import org.eclipse.jetty.http3.server.AbstractHTTP3ServerConnectionFactory;
+import org.eclipse.jetty.http3.server.internal.HTTP3SessionServer;
 import org.eclipse.jetty.quic.client.ClientQuicSession;
 import org.eclipse.jetty.quic.common.QuicSession;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
 
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -90,6 +93,59 @@ public void onSettings(Session session, SettingsFrame frame)
         assertTrue(clientSettingsLatch.await(5, TimeUnit.SECONDS));
     }
 
+    @Test
+    public void testSettings() throws Exception
+    {
+        Map.Entry<Long, Long> maxTableCapacity = new AbstractMap.SimpleEntry<>(SettingsFrame.MAX_TABLE_CAPACITY, 1024L);
+        Map.Entry<Long, Long> maxHeaderSize = new AbstractMap.SimpleEntry<>(SettingsFrame.MAX_FIELD_SECTION_SIZE, 2048L);
+        Map.Entry<Long, Long> maxBlockedStreams = new AbstractMap.SimpleEntry<>(SettingsFrame.MAX_BLOCKED_STREAMS, 16L);
+        CountDownLatch settingsLatch = new CountDownLatch(2);
+        AtomicReference<HTTP3SessionServer> serverSessionRef = new AtomicReference<>();
+        start(new Session.Server.Listener()
+        {
+            @Override
+            public Map<Long, Long> onPreface(Session session)
+            {
+                serverSessionRef.set((HTTP3SessionServer)session);
+                return Map.ofEntries(maxTableCapacity, maxHeaderSize, maxBlockedStreams);
+            }
+
+            @Override
+            public void onSettings(Session session, SettingsFrame frame)
+            {
+                settingsLatch.countDown();
+            }
+        });
+
+        HTTP3SessionClient clientSession = (HTTP3SessionClient)newSession(new Session.Client.Listener()
+        {
+            @Override
+            public Map<Long, Long> onPreface(Session session)
+            {
+                return Map.ofEntries(maxTableCapacity, maxHeaderSize, maxBlockedStreams);
+            }
+
+            @Override
+            public void onSettings(Session session, SettingsFrame frame)
+            {
+                settingsLatch.countDown();
+            }
+        });
+
+        assertTrue(settingsLatch.await(5, TimeUnit.SECONDS));
+
+        HTTP3SessionServer serverSession = serverSessionRef.get();
+        assertEquals(maxTableCapacity.getValue(), serverSession.getProtocolSession().getQpackEncoder().getCapacity());
+        assertEquals(maxBlockedStreams.getValue(), serverSession.getProtocolSession().getQpackEncoder().getMaxBlockedStreams());
+        assertEquals(maxBlockedStreams.getValue(), serverSession.getProtocolSession().getQpackDecoder().getMaxBlockedStreams());
+        assertEquals(maxHeaderSize.getValue(), serverSession.getProtocolSession().getQpackDecoder().getMaxHeaderSize());
+
+        assertEquals(maxTableCapacity.getValue(), clientSession.getProtocolSession().getQpackEncoder().getCapacity());
+        assertEquals(maxBlockedStreams.getValue(), clientSession.getProtocolSession().getQpackEncoder().getMaxBlockedStreams());
+        assertEquals(maxBlockedStreams.getValue(), clientSession.getProtocolSession().getQpackDecoder().getMaxBlockedStreams());
+        assertEquals(maxHeaderSize.getValue(), clientSession.getProtocolSession().getQpackDecoder().getMaxHeaderSize());
+    }
+
     @Test
     public void testGETThenResponseWithoutContent() throws Exception
     {

jetty-http3/http3-tests/src/test/java/org/eclipse/jetty/http3/tests/ExternalServerTest.java

@@ -44,8 +44,9 @@ public void testExternalServer() throws Exception
         client.start();
         try
         {
+            HostPort hostPort = new HostPort("google.com:443");
 //            HostPort hostPort = new HostPort("nghttp2.org:4433");
-            HostPort hostPort = new HostPort("quic.tech:8443");
+//            HostPort hostPort = new HostPort("quic.tech:8443");
 //            HostPort hostPort = new HostPort("h2o.examp1e.net:443");
 //            HostPort hostPort = new HostPort("test.privateoctopus.com:4433");
             Session.Client session = client.connect(new InetSocketAddress(hostPort.getHost(), hostPort.getPort()), new Session.Client.Listener() {})