src/java.base/share/classes/sun/net/ext/ExtendedSocketOptions.java

*** 46,72 ****
--- 46,80 ----
  
      private final Set<SocketOption<?>> options;
      private final Set<SocketOption<?>> datagramOptions;
      private final Set<SocketOption<?>> clientStreamOptions;
      private final Set<SocketOption<?>> serverStreamOptions;
+     private final Set<SocketOption<?>> unixOptions;
  
      /** Tells whether or not the option is supported. */
      public final boolean isOptionSupported(SocketOption<?> option) {
          return options().contains(option);
      }
  
      /** Return the, possibly empty, set of extended socket options available. */
      public final Set<SocketOption<?>> options() { return options; }
  
+     /** Return the, possibly empty, set of extended socket options available. */
+     public final Set<SocketOption<?>> unixOptions() { return unixOptions; }
+ 
      /**
       * Returns the (possibly empty) set of extended socket options for
       * stream-oriented listening sockets.
       */
      public static Set<SocketOption<?>> serverSocketOptions() {
          return getInstance().options0(SOCK_STREAM, true);
      }
  
+     public static Set<SocketOption<?>> unixSocketOptions() {
+         return getInstance().unixOptions();
+     }
+ 
      /**
       * Returns the (possibly empty) set of extended socket options for
       * stream-oriented connecting sockets.
       */
      public static Set<SocketOption<?>> clientSocketOptions() {
*** 80,96 ****
      public static Set<SocketOption<?>> datagramSocketOptions() {
          return getInstance().options0(SOCK_DGRAM, false);
      }
  
      private static boolean isDatagramOption(SocketOption<?> option) {
!         return !option.name().startsWith("TCP_");
      }
  
      private static boolean isStreamOption(SocketOption<?> option, boolean server) {
          if (server && "SO_FLOW_SLA".equals(option.name())) {
              return false;
          } else {
              return !option.name().startsWith("UDP_");
          }
      }
  
      private Set<SocketOption<?>> options0(short type, boolean server) {
--- 88,111 ----
      public static Set<SocketOption<?>> datagramSocketOptions() {
          return getInstance().options0(SOCK_DGRAM, false);
      }
  
      private static boolean isDatagramOption(SocketOption<?> option) {
!         return !option.name().startsWith("TCP_") && !isUnixOption(option);
!     }
! 
!     private static boolean isUnixOption(SocketOption<?> option) {
!         return option.name().equals("SO_PEERCRED");
      }
  
      private static boolean isStreamOption(SocketOption<?> option, boolean server) {
          if (server && "SO_FLOW_SLA".equals(option.name())) {
              return false;
          } else {
+             if (isUnixOption(option)) {
+                 return false;
+             }
              return !option.name().startsWith("UDP_");
          }
      }
  
      private Set<SocketOption<?>> options0(short type, boolean server) {
*** 120,143 ****
--- 135,163 ----
      protected ExtendedSocketOptions(Set<SocketOption<?>> options) {
          this.options = options;
          var datagramOptions = new HashSet<SocketOption<?>>();
          var serverStreamOptions = new HashSet<SocketOption<?>>();
          var clientStreamOptions = new HashSet<SocketOption<?>>();
+         var unixOptions = new HashSet<SocketOption<?>>();
          for (var option : options) {
              if (isDatagramOption(option)) {
                  datagramOptions.add(option);
              }
              if (isStreamOption(option, true)) {
                  serverStreamOptions.add(option);
              }
              if (isStreamOption(option, false)) {
                  clientStreamOptions.add(option);
              }
+             if (isUnixOption(option)) {
+                 unixOptions.add(option);
+             }
          }
          this.datagramOptions = Set.copyOf(datagramOptions);
          this.serverStreamOptions = Set.copyOf(serverStreamOptions);
          this.clientStreamOptions = Set.copyOf(clientStreamOptions);
+         this.unixOptions = Set.copyOf(unixOptions);
      }
  
      private static volatile ExtendedSocketOptions instance;
  
      public static final ExtendedSocketOptions getInstance() { return instance; }