- name: Build on ${{ matrix.os }}
        if: matrix.os == 'ubuntu-latest'
        env:
          CGO_ENABLED: 0
          GO111MODULE: on
        run: |
          sudo sysctl net.ipv6.conf.all.disable_ipv6=0
          sudo sysctl net.ipv6.conf.default.disable_ipv6=0

      - name: Build on ${{ matrix.os }}
        if: matrix.os == 'ubuntu-latest'
        env:
          CGO_ENABLED: 0
          GO111MODULE: on
        run: |
          sudo sysctl net.ipv6.conf.all.disable_ipv6=0
          sudo sysctl net.ipv6.conf.default.disable_ipv6=0

          GO111MODULE: on
          MINIO_KMS_SECRET_KEY: "my-minio-key:oyArl7zlPECEduNbB1KXgdzDn2Bdpvvw0l8VO51HQnY="
          MINIO_KMS_AUTO_ENCRYPTION: on
        run: |
          sudo sysctl net.ipv6.conf.all.disable_ipv6=0
          sudo sysctl net.ipv6.conf.default.disable_ipv6=0
          make verify-healing
          make verify-healing-inconsistent-versions
          make verify-healing-with-root-disks

    if (!platform.isBouncyCastle()) {
      assertThat(recordedRequest.handshakeServerNames).containsExactly("url-host.com")
    }
  }

  /** No SNI for literal IPv6 addresses. */
  @Test
  fun ipv6() {
    val recordedRequest = requestToHostnameViaProxy("2607:f8b0:400b:804::200e")
    assertThat(recordedRequest.url.host).isEqualTo("2607:f8b0:400b:804::200e")

	"github.com/minio/minio/internal/config"
	"github.com/minio/minio/internal/logger"
	xnet "github.com/minio/pkg/v3/net"
)

var (
	// IPv4 addresses of localhost.
	localIP4 = mustGetLocalIP4()

	// IPv6 addresses of localhost.
	localIP6 = mustGetLocalIP6()

	// List of all local loopback addresses.
	localLoopbacks = mustGetLocalLoopbacks()
)

 * Prefer to alternate IP addresses from different address families, (IPv6 / IPv4), starting with IPv6.
 * Don't start a new attempt until 250 ms after the most recent attempt was started.
 * Keep whichever TCP connection succeeds first and cancel all the others.

        // SockaddrStorage (128 bytes)
        encodeSockaddr(buffer, 20);
        
        return buffer;
    }
    
    private void encodeSockaddr(byte[] buffer, int offset) {
        if (ipv6) {
            // IPv6 sockaddr_in6 structure
            writeInt2(buffer, offset, 23);  // AF_INET6
            writeInt2(buffer, offset + 2, 445);  // Port
            writeInt4(buffer, offset + 4, 0);  // Flow info

	printCLIAccessMsg(strippedAPIEndpoints[0], "myminio")

	// Prints documentation message.
	printObjectAPIMsg()
	if globalIsDistErasure {
		logger.Startup(color.Bold(banner))
	}
}

// Returns true if input is IPv6
func isIPv6(host string) bool {
	h, _, err := net.SplitHostPort(host)
	if err != nil {
		h = host
	}
	ip := net.ParseIP(h)
	return ip.To16() != nil && ip.To4() == nil
}

        @ParameterizedTest
        @DisplayName("Should handle IPv6 addresses correctly")
        @CsvSource({ "'ncacn_np:[::1][endpoint=\\pipe\\srvsvc]', ncacn_np, '[::1]', '\\pipe\\srvsvc'" })
        void testParseIPv6BindingUrls(String url, String expectedProto, String expectedServer, String expectedEndpoint)
                throws DcerpcException {
            // When: Parsing IPv6 binding URL

 * [system DNS service][SYSTEM], which is the default. Some applications may provide their own
 * implementation to use a different DNS server, to prefer IPv6 addresses, to prefer IPv4 addresses,
 * or to force a specific known IP address.
 *
 * Implementations of this interface must be safe for concurrent use.
 */
fun interface Dns {
  /**