public final class org.apache.logging.log4j.core.util.NetUtils
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.apache.logging.log4j.core.util.NetUtils
  super_class: java.lang.Object
{
  private static final org.apache.logging.log4j.Logger LOGGER;
    descriptor: Lorg/apache/logging/log4j/Logger;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final java.lang.String UNKNOWN_LOCALHOST;
    descriptor: Ljava/lang/String;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: "UNKNOWN_LOCALHOST"

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 38
            invokestatic org.apache.logging.log4j.status.StatusLogger.getLogger:()Lorg/apache/logging/log4j/status/StatusLogger;
            putstatic org.apache.logging.log4j.core.util.NetUtils.LOGGER:Lorg/apache/logging/log4j/Logger;
         1: .line 39
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.logging.log4j.core.util.NetUtils this
         0: .line 41
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 43
            return
        end local 0 // org.apache.logging.log4j.core.util.NetUtils this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/logging/log4j/core/util/NetUtils;

  public static java.lang.String getLocalHostname();
    descriptor: ()Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=6, args_size=0
         0: .line 53
            invokestatic java.net.InetAddress.getLocalHost:()Ljava/net/InetAddress;
            astore 0 /* addr */
        start local 0 // java.net.InetAddress addr
         1: .line 54
            aload 0 /* addr */
            invokevirtual java.net.InetAddress.getHostName:()Ljava/lang/String;
         2: areturn
        end local 0 // java.net.InetAddress addr
         3: .line 55
      StackMap locals:
      StackMap stack: java.net.UnknownHostException
            astore 0 /* uhe */
        start local 0 // java.net.UnknownHostException uhe
         4: .line 57
            invokestatic java.net.NetworkInterface.getNetworkInterfaces:()Ljava/util/Enumeration;
            astore 1 /* interfaces */
        start local 1 // java.util.Enumeration interfaces
         5: .line 58
            goto 16
         6: .line 59
      StackMap locals: java.net.UnknownHostException java.util.Enumeration
      StackMap stack:
            aload 1 /* interfaces */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast java.net.NetworkInterface
            astore 2 /* nic */
        start local 2 // java.net.NetworkInterface nic
         7: .line 60
            aload 2 /* nic */
            invokevirtual java.net.NetworkInterface.getInetAddresses:()Ljava/util/Enumeration;
            astore 3 /* addresses */
        start local 3 // java.util.Enumeration addresses
         8: .line 61
            goto 15
         9: .line 62
      StackMap locals: java.net.NetworkInterface java.util.Enumeration
      StackMap stack:
            aload 3 /* addresses */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast java.net.InetAddress
            astore 4 /* address */
        start local 4 // java.net.InetAddress address
        10: .line 63
            aload 4 /* address */
            invokevirtual java.net.InetAddress.isLoopbackAddress:()Z
            ifne 15
        11: .line 64
            aload 4 /* address */
            invokevirtual java.net.InetAddress.getHostName:()Ljava/lang/String;
            astore 5 /* hostname */
        start local 5 // java.lang.String hostname
        12: .line 65
            aload 5 /* hostname */
            ifnull 15
        13: .line 66
            aload 5 /* hostname */
        14: areturn
        end local 5 // java.lang.String hostname
        end local 4 // java.net.InetAddress address
        15: .line 61
      StackMap locals:
      StackMap stack:
            aload 3 /* addresses */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 9
        end local 3 // java.util.Enumeration addresses
        end local 2 // java.net.NetworkInterface nic
        16: .line 58
      StackMap locals:
      StackMap stack:
            aload 1 /* interfaces */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 6
        end local 1 // java.util.Enumeration interfaces
        17: .line 71
            goto 21
      StackMap locals: java.net.UnknownHostException
      StackMap stack: java.net.SocketException
        18: pop
        19: .line 72
            getstatic org.apache.logging.log4j.core.util.NetUtils.LOGGER:Lorg/apache/logging/log4j/Logger;
            ldc "Could not determine local host name"
            aload 0 /* uhe */
            invokeinterface org.apache.logging.log4j.Logger.error:(Ljava/lang/String;Ljava/lang/Throwable;)V
        20: .line 73
            ldc "UNKNOWN_LOCALHOST"
            areturn
        21: .line 75
      StackMap locals:
      StackMap stack:
            getstatic org.apache.logging.log4j.core.util.NetUtils.LOGGER:Lorg/apache/logging/log4j/Logger;
            ldc "Could not determine local host name"
            aload 0 /* uhe */
            invokeinterface org.apache.logging.log4j.Logger.error:(Ljava/lang/String;Ljava/lang/Throwable;)V
        22: .line 76
            ldc "UNKNOWN_LOCALHOST"
            areturn
        end local 0 // java.net.UnknownHostException uhe
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            1    3     0        addr  Ljava/net/InetAddress;
            4   23     0         uhe  Ljava/net/UnknownHostException;
            5   17     1  interfaces  Ljava/util/Enumeration<Ljava/net/NetworkInterface;>;
            7   16     2         nic  Ljava/net/NetworkInterface;
            8   16     3   addresses  Ljava/util/Enumeration<Ljava/net/InetAddress;>;
           10   15     4     address  Ljava/net/InetAddress;
           12   15     5    hostname  Ljava/lang/String;
      Exception table:
        from    to  target  type
           0     2       3  Class java.net.UnknownHostException
           4    14      18  Class java.net.SocketException
          15    17      18  Class java.net.SocketException

  public static byte[] getMacAddress();
    descriptor: ()[B
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=5, args_size=0
         0: .line 87
            aconst_null
            astore 0 /* mac */
        start local 0 // byte[] mac
         1: .line 89
            invokestatic java.net.InetAddress.getLocalHost:()Ljava/net/InetAddress;
            astore 1 /* localHost */
        start local 1 // java.net.InetAddress localHost
         2: .line 91
            aload 1 /* localHost */
            invokestatic java.net.NetworkInterface.getByInetAddress:(Ljava/net/InetAddress;)Ljava/net/NetworkInterface;
            astore 2 /* localInterface */
        start local 2 // java.net.NetworkInterface localInterface
         3: .line 92
            aload 2 /* localInterface */
            invokestatic org.apache.logging.log4j.core.util.NetUtils.isUpAndNotLoopback:(Ljava/net/NetworkInterface;)Z
            ifeq 5
         4: .line 93
            aload 2 /* localInterface */
            invokevirtual java.net.NetworkInterface.getHardwareAddress:()[B
            astore 0 /* mac */
         5: .line 95
      StackMap locals: byte[] java.net.InetAddress java.net.NetworkInterface
      StackMap stack:
            aload 0 /* mac */
            ifnonnull 15
         6: .line 96
            invokestatic java.net.NetworkInterface.getNetworkInterfaces:()Ljava/util/Enumeration;
            astore 3 /* networkInterfaces */
        start local 3 // java.util.Enumeration networkInterfaces
         7: .line 97
            goto 11
         8: .line 98
      StackMap locals: java.util.Enumeration
      StackMap stack:
            aload 3 /* networkInterfaces */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast java.net.NetworkInterface
            astore 4 /* nic */
        start local 4 // java.net.NetworkInterface nic
         9: .line 99
            aload 4 /* nic */
            invokestatic org.apache.logging.log4j.core.util.NetUtils.isUpAndNotLoopback:(Ljava/net/NetworkInterface;)Z
            ifeq 11
        10: .line 100
            aload 4 /* nic */
            invokevirtual java.net.NetworkInterface.getHardwareAddress:()[B
            astore 0 /* mac */
        end local 4 // java.net.NetworkInterface nic
        11: .line 97
      StackMap locals:
      StackMap stack:
            aload 3 /* networkInterfaces */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifeq 15
            aload 0 /* mac */
            ifnull 8
        end local 3 // java.util.Enumeration networkInterfaces
        end local 2 // java.net.NetworkInterface localInterface
        12: .line 104
            goto 15
      StackMap locals: byte[] java.net.InetAddress
      StackMap stack: java.net.SocketException
        13: astore 2 /* e */
        start local 2 // java.net.SocketException e
        14: .line 105
            getstatic org.apache.logging.log4j.core.util.NetUtils.LOGGER:Lorg/apache/logging/log4j/Logger;
            aload 2 /* e */
            invokeinterface org.apache.logging.log4j.Logger.catching:(Ljava/lang/Throwable;)V
        end local 2 // java.net.SocketException e
        15: .line 107
      StackMap locals:
      StackMap stack:
            aload 0 /* mac */
            ifnull 16
            aload 0 /* mac */
            arraylength
            ifne 19
        16: .line 108
      StackMap locals:
      StackMap stack:
            aload 1 /* localHost */
            invokevirtual java.net.InetAddress.getAddress:()[B
            astore 0 /* mac */
        end local 1 // java.net.InetAddress localHost
        17: .line 110
            goto 19
      StackMap locals: byte[]
      StackMap stack: java.net.UnknownHostException
        18: pop
        19: .line 113
      StackMap locals:
      StackMap stack:
            aload 0 /* mac */
            areturn
        end local 0 // byte[] mac
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            1   20     0                mac  [B
            2   17     1          localHost  Ljava/net/InetAddress;
            3   12     2     localInterface  Ljava/net/NetworkInterface;
            7   12     3  networkInterfaces  Ljava/util/Enumeration<Ljava/net/NetworkInterface;>;
            9   11     4                nic  Ljava/net/NetworkInterface;
           14   15     2                  e  Ljava/net/SocketException;
      Exception table:
        from    to  target  type
           2    12      13  Class java.net.SocketException
           1    17      18  Class java.net.UnknownHostException

  public static java.lang.String getMacAddressString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=8, locals=3, args_size=0
         0: .line 121
            invokestatic org.apache.logging.log4j.core.util.NetUtils.getMacAddress:()[B
            astore 0 /* macAddr */
        start local 0 // byte[] macAddr
         1: .line 122
            aload 0 /* macAddr */
            ifnull 9
            aload 0 /* macAddr */
            arraylength
            ifle 9
         2: .line 123
            new java.lang.StringBuilder
            dup
            ldc "%02x"
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            aload 0 /* macAddr */
            iconst_0
            baload
            invokestatic java.lang.Byte.valueOf:(B)Ljava/lang/Byte;
            aastore
            invokestatic java.lang.String.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            astore 1 /* sb */
        start local 1 // java.lang.StringBuilder sb
         3: .line 124
            iconst_1
            istore 2 /* i */
        start local 2 // int i
         4: goto 7
         5: .line 125
      StackMap locals: byte[] java.lang.StringBuilder int
      StackMap stack:
            aload 1 /* sb */
            ldc ":"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "%02x"
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            aload 0 /* macAddr */
            iload 2 /* i */
            baload
            invokestatic java.lang.Byte.valueOf:(B)Ljava/lang/Byte;
            aastore
            invokestatic java.lang.String.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         6: .line 124
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
         7: iload 2 /* i */
            aload 0 /* macAddr */
            arraylength
            if_icmplt 5
        end local 2 // int i
         8: .line 127
            aload 1 /* sb */
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 1 // java.lang.StringBuilder sb
         9: .line 130
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        end local 0 // byte[] macAddr
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            1   10     0  macAddr  [B
            3    9     1       sb  Ljava/lang/StringBuilder;
            4    8     2        i  I

  private static boolean isUpAndNotLoopback(java.net.NetworkInterface);
    descriptor: (Ljava/net/NetworkInterface;)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // java.net.NetworkInterface ni
         0: .line 134
            aload 0 /* ni */
            ifnull 1
            aload 0 /* ni */
            invokevirtual java.net.NetworkInterface.isLoopback:()Z
            ifne 1
            aload 0 /* ni */
            invokevirtual java.net.NetworkInterface.isUp:()Z
            ifeq 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // java.net.NetworkInterface ni
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0    ni  Ljava/net/NetworkInterface;
    Exceptions:
      throws java.net.SocketException
    MethodParameters:
      Name  Flags
      ni    final

  public static java.net.URI toURI(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/net/URI;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=6, locals=2, args_size=1
        start local 0 // java.lang.String path
         0: .line 146
            new java.net.URI
            dup
            aload 0 /* path */
            invokespecial java.net.URI.<init>:(Ljava/lang/String;)V
         1: areturn
         2: .line 147
      StackMap locals:
      StackMap stack: java.net.URISyntaxException
            pop
         3: .line 151
            new java.net.URL
            dup
            aload 0 /* path */
            invokespecial java.net.URL.<init>:(Ljava/lang/String;)V
            astore 1 /* url */
        start local 1 // java.net.URL url
         4: .line 152
            new java.net.URI
            dup
            aload 1 /* url */
            invokevirtual java.net.URL.getProtocol:()Ljava/lang/String;
            aload 1 /* url */
            invokevirtual java.net.URL.getHost:()Ljava/lang/String;
            aload 1 /* url */
            invokevirtual java.net.URL.getPath:()Ljava/lang/String;
            aconst_null
            invokespecial java.net.URI.<init>:(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
         5: areturn
        end local 1 // java.net.URL url
         6: .line 153
      StackMap locals:
      StackMap stack: java.lang.Exception
            pop
         7: .line 154
            new java.io.File
            dup
            aload 0 /* path */
            invokespecial java.io.File.<init>:(Ljava/lang/String;)V
            invokevirtual java.io.File.toURI:()Ljava/net/URI;
            areturn
        end local 0 // java.lang.String path
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    8     0  path  Ljava/lang/String;
            4    6     1   url  Ljava/net/URL;
      Exception table:
        from    to  target  type
           0     1       2  Class java.net.URISyntaxException
           3     5       6  Class java.net.MalformedURLException
           3     5       6  Class java.net.URISyntaxException
    MethodParameters:
      Name  Flags
      path  final
}
SourceFile: "NetUtils.java"