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.kafka.common.network;
  
  import org.junit.jupiter.api.Test;
  
  import java.io.IOException;
  import java.net.InetAddress;
  import java.net.Socket;
  import java.util.Map;
  import java.util.Optional;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  public class ServerConnectionIdTest {
  
      @Test
      public void testFromString() {
          // Test valid connection id
          String connectionIdString = "localhost:9092-localhost:9093-1-2";
          Optional<ServerConnectionId> serverConnectionIdOptional = ServerConnectionId.fromString(connectionIdString);
          assertTrue(serverConnectionIdOptional.isPresent());
          ServerConnectionId serverConnectionId = serverConnectionIdOptional.get();
  
          assertEquals("localhost", serverConnectionId.localHost());
          assertEquals(9092, serverConnectionId.localPort());
          assertEquals("localhost", serverConnectionId.remoteHost());
          assertEquals(9093, serverConnectionId.remotePort());
          assertEquals(1, serverConnectionId.processorId());
          assertEquals(2, serverConnectionId.index());
  
          connectionIdString = "localhost:9092-127.0.0.1:9093-0-0";
          serverConnectionIdOptional = ServerConnectionId.fromString(connectionIdString);
          assertTrue(serverConnectionIdOptional.isPresent());
          serverConnectionId = serverConnectionIdOptional.get();
  
          assertEquals("localhost", serverConnectionId.localHost());
          assertEquals(9092, serverConnectionId.localPort());
          assertEquals("127.0.0.1", serverConnectionId.remoteHost());
          assertEquals(9093, serverConnectionId.remotePort());
          assertEquals(0, serverConnectionId.processorId());
          assertEquals(0, serverConnectionId.index());
  
          // IPv6 endpoints
          connectionIdString = "2001:db8:0:0:0:0:0:1:9092-127.0.0.1:9093-1-2";
          serverConnectionIdOptional = ServerConnectionId.fromString(connectionIdString);
          assertTrue(serverConnectionIdOptional.isPresent());
          serverConnectionId = serverConnectionIdOptional.get();
  
          assertEquals("2001:db8:0:0:0:0:0:1", serverConnectionId.localHost());
          assertEquals(9092, serverConnectionId.localPort());
          assertEquals("127.0.0.1", serverConnectionId.remoteHost());
          assertEquals(9093, serverConnectionId.remotePort());
          assertEquals(1, serverConnectionId.processorId());
          assertEquals(2, serverConnectionId.index());
  
          connectionIdString = "2002:db9:1:0:0:0:0:1:9092-2001:db8::1:9093-0-1";
          serverConnectionIdOptional = ServerConnectionId.fromString(connectionIdString);
          assertTrue(serverConnectionIdOptional.isPresent());
          serverConnectionId = serverConnectionIdOptional.get();
  
          assertEquals("2002:db9:1:0:0:0:0:1", serverConnectionId.localHost());
          assertEquals(9092, serverConnectionId.localPort());
          assertEquals("2001:db8::1", serverConnectionId.remoteHost());
          assertEquals(9093, serverConnectionId.remotePort());
          assertEquals(0, serverConnectionId.processorId());
          assertEquals(1, serverConnectionId.index());
      }
  
      @Test
      public void testFromStringInvalid() {
          // Test invalid connection id params length
          String connectionIdString = "localhost:9092-localhost:9093-1";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          connectionIdString = "localhost:9092-localhost:9093-1-2-3";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          // Invalid separator
          connectionIdString = "localhost-9092-localhost:9093-1-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          connectionIdString = "localhost:9092:localhost-9093-1-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          // No separator in port
          connectionIdString = "localhost9092-localhost:9093-1-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          connectionIdString = "localhost:9092-localhost9093-1-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          // Invalid port
          connectionIdString = "localhost:abcd-localhost:9093-1-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          connectionIdString = "localhost:9092-localhost:abcd-1-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          // Invalid processorId
          connectionIdString = "localhost:9092-localhost:9093-a-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          // Invalid index
          connectionIdString = "localhost:9092-localhost:9093-1-b";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
  
          // Invalid IPv6 address
          connectionIdString = "[2001:db8:0:0:0:0:0:1]:9092-127.0.0.1:9093-1-2";
          assertFalse(ServerConnectionId.fromString(connectionIdString).isPresent());
      }
  
      @Test
      public void testGenerateConnectionId() throws IOException {
          Socket socket = mock(Socket.class);
          when(socket.getLocalAddress()).thenReturn(InetAddress.getByName("127.0.0.1"));
          when(socket.getLocalPort()).thenReturn(9092);
          when(socket.getInetAddress()).thenReturn(InetAddress.getByName("127.0.0.1"));
          when(socket.getPort()).thenReturn(9093);
  
          assertEquals("127.0.0.1:9092-127.0.0.1:9093-0-0", ServerConnectionId.generateConnectionId(socket, 0, 0));
          assertEquals("127.0.0.1:9092-127.0.0.1:9093-1-2", ServerConnectionId.generateConnectionId(socket, 1, 2));
      }
  
      @Test
      public void testGenerateConnectionIdIpV6() throws IOException {
          Socket socket = mock(Socket.class);
          // The test should pass when the address is enclosed in brackets for socket. As getHostAddress()
          // returns the address without brackets.
          when(socket.getLocalAddress()).thenReturn(InetAddress.getByName("[2001:db8::1]"));
          when(socket.getLocalPort()).thenReturn(9092);
          when(socket.getInetAddress()).thenReturn(InetAddress.getByName("127.0.0.1"));
          when(socket.getPort()).thenReturn(9093);
  
          assertEquals("2001:db8:0:0:0:0:0:1:9092-127.0.0.1:9093-1-2", ServerConnectionId.generateConnectionId(socket, 1, 2));
  
          when(socket.getLocalAddress()).thenReturn(InetAddress.getByName("[2002:db9:1::1]"));
          when(socket.getLocalPort()).thenReturn(9092);
          when(socket.getInetAddress()).thenReturn(InetAddress.getByName("[2001:db8::1]"));
          when(socket.getPort()).thenReturn(9093);
  
          assertEquals("2002:db9:1:0:0:0:0:1:9092-2001:db8:0:0:0:0:0:1:9093-1-2", ServerConnectionId.generateConnectionId(socket, 1, 2));
  
          // Without brackets
          when(socket.getLocalAddress()).thenReturn(InetAddress.getByName("2002:db9:1::1"));
          when(socket.getLocalPort()).thenReturn(9092);
          when(socket.getInetAddress()).thenReturn(InetAddress.getByName("2001:db8::1"));
          when(socket.getPort()).thenReturn(9093);
  
          assertEquals("2002:db9:1:0:0:0:0:1:9092-2001:db8:0:0:0:0:0:1:9093-1-2", ServerConnectionId.generateConnectionId(socket, 1, 2));
      }
  
      @Test
      public void testParseHostPort() {
          Optional<Map.Entry<String, Integer>> hostPortEntry = ServerConnectionId.parseHostPort("myhost:9092");
          assertTrue(hostPortEntry.isPresent());
          assertEquals("myhost", hostPortEntry.get().getKey());
          assertEquals(9092, hostPortEntry.get().getValue());
  
          hostPortEntry = ServerConnectionId.parseHostPort("127.0.0.1:9092");
          assertTrue(hostPortEntry.isPresent());
          assertEquals("127.0.0.1", hostPortEntry.get().getKey());
          assertEquals(9092, hostPortEntry.get().getValue());
  
          // IPv6 endpoint
          hostPortEntry = ServerConnectionId.parseHostPort("2001:db8::1:9092");
          assertTrue(hostPortEntry.isPresent());
          assertEquals("2001:db8::1", hostPortEntry.get().getKey());
          assertEquals(9092, hostPortEntry.get().getValue());
      }
  
      @Test
      public void testParseHostPortInvalid() {
          // Invalid separator
          Optional<Map.Entry<String, Integer>> hostPortEntry = ServerConnectionId.parseHostPort("myhost-9092");
          assertFalse(hostPortEntry.isPresent());
  
          // No separator
          hostPortEntry = ServerConnectionId.parseHostPort("myhost9092");
          assertFalse(hostPortEntry.isPresent());
  
          // Invalid port
          hostPortEntry = ServerConnectionId.parseHostPort("myhost:abcd");
          assertFalse(hostPortEntry.isPresent());
  
          // Invalid IPv6 endpoint
          hostPortEntry = ServerConnectionId.parseHostPort("[2001:db8::1]:9092");
          assertFalse(hostPortEntry.isPresent());
      }
  }
  