content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.cassandra.distributed.test;
  
  import java.io.IOException;
  import java.io.UncheckedIOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  import java.util.concurrent.TimeoutException;
  
  import com.google.common.collect.ImmutableMap;
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.Feature;
  import org.apache.cassandra.distributed.api.IInvokableInstance;
  import org.apache.cassandra.distributed.api.LogAction;
  import org.apache.cassandra.transport.Message;
  import org.apache.cassandra.transport.ProtocolVersion;
  import org.apache.cassandra.transport.SimpleClient;
  import org.apache.cassandra.transport.messages.ErrorMessage;
  import org.assertj.core.api.Assertions;
  
  @RunWith(Parameterized.class)
  public class UnableToParseClientMessageFromBlockedSubnetTest extends TestBaseImpl
  {
      private static Cluster CLUSTER;
      private static List<String> CLUSTER_EXCLUDED_SUBNETS;
  
      @SuppressWarnings("DefaultAnnotationParam")
      @Parameterized.Parameter(0)
      public List<String> excludeSubnets;
      @Parameterized.Parameter(1)
      public ProtocolVersion version;
  
      @Parameterized.Parameters(name = "domains={0},version={1}")
      public static Iterable<Object[]> params()
      {
          List<Object[]> tests = new ArrayList<>();
          for (List<String> domains : Arrays.asList(Collections.singletonList("127.0.0.1"), Collections.singletonList("127.0.0.0/31")))
          {
              for (ProtocolVersion version : ProtocolVersion.SUPPORTED)
              {
                  tests.add(new Object[] { domains, version });
              }
          }
          return tests;
      }
  
      @BeforeClass
      public static void setup()
      {
          DatabaseDescriptor.daemonInitialization();
      }
  
      @AfterClass
      public static void cleanup()
      {
          if (CLUSTER != null)
              CLUSTER.close();
      }
  
      @Test
      public void badMessageCausesProtocolExceptionFromExcludeList() throws IOException, TimeoutException
      {
          Cluster cluster = getCluster();
          // write gibberish to the native protocol
          IInvokableInstance node = cluster.get(1);
          // make sure everything is fine at the start
          Assertions.assertThat(node.metrics().getCounter("org.apache.cassandra.metrics.Client.ProtocolException")).isEqualTo(0);
          Assertions.assertThat(node.metrics().getCounter("org.apache.cassandra.metrics.Client.UnknownException")).isEqualTo(0);
  
          LogAction logs = node.logs();
          long mark = logs.mark();
          try (SimpleClient client = SimpleClient.builder("127.0.0.1", 9042).protocolVersion(version).useBeta().build())
          {
              client.connect(false, true);
  
              // this should return a failed response
              // disable waiting on procol errors as that logic was reverted until we can figure out its 100% safe
              // right now ProtocolException is thrown for fatal and non-fatal issues, so closing the channel
              // on non-fatal issues could cause other issues for the cluster
              byte expectedVersion = (byte) (80 + version.asInt());
              Message.Response response = client.execute(new UnableToParseClientMessageTest.CustomHeaderMessage(new byte[]{ expectedVersion, 1, 2, 3, 4, 5, 6, 7, 8, 9 }), false);
              Assertions.assertThat(response).isInstanceOf(ErrorMessage.class);
  
              logs.watchFor(mark, "address contained in client_error_reporting_exclusions");
              Assertions.assertThat(node.metrics().getCounter("org.apache.cassandra.metrics.Client.ProtocolException")).isEqualTo(0);
              Assertions.assertThat(node.metrics().getCounter("org.apache.cassandra.metrics.Client.UnknownException")).isEqualTo(0);
  
              Assertions.assertThat(logs.grep(mark, "Excluding client exception fo").getResult()).hasSize(1);
              Assertions.assertThat(logs.grep(mark, "Unexpected exception during request").getResult()).isEmpty();
          }
      }
  
      private Cluster getCluster()
      {
          if (CLUSTER == null || CLUSTER_EXCLUDED_SUBNETS != excludeSubnets)
          {
              if (CLUSTER != null)
              {
                  CLUSTER.close();
                  CLUSTER = null;
              }
              try
              {
                  CLUSTER = init(Cluster.build(1)
                                        .withConfig(c -> c.with(Feature.values()).set("client_error_reporting_exclusions", ImmutableMap.of("subnets", excludeSubnets)))
                                        .start());
                  CLUSTER_EXCLUDED_SUBNETS = excludeSubnets;
              }
              catch (IOException e)
              {
                  throw new UncheckedIOException(e);
              }
          }
          return CLUSTER;
      }
  }
  