assertEquals(NbtAddress.SMBSERVER_NAME, nbtAddress.firstCalledName());

        mockName = new Name(mockConfig, "DOMAIN", 0x1C, null); // Domain Controller
        nbtAddress = new NbtAddress(mockName, testAddressInt, false, NbtAddress.H_NODE);
        assertEquals(NbtAddress.SMBSERVER_NAME, nbtAddress.firstCalledName());

        UniAddress ua = new UniAddress(addr);
        // Act: first call should set to SMBSERVER_NAME
        String initial = ua.firstCalledName();
        // verify that subsequent call gives SMBSERVER_NAME
        String next = ua.nextCalledName();
        // Assert
        assertEquals(NbtAddress.SMBSERVER_NAME, next, "nextCalledName should return SMBSERVER_NAME after first call");
    }

    @Test

            this.calledName = NbtAddress.SMBSERVER_NAME;
        } else {
            final int i = this.calledName.indexOf('.');
            if (i > 1 && i < 15) {
                this.calledName = this.calledName.substring(0, i).toUpperCase();
            } else if (this.calledName.length() > 15) {
                this.calledName = NbtAddress.SMBSERVER_NAME;
            } else {

        if (this.calledName == this.hostName.name) {
            this.calledName = SMBSERVER_NAME;
        } else if (SMBSERVER_NAME.equals(this.calledName)) {
            NetbiosAddress[] addrs;

            try {
                addrs = tc.getNameServiceClient().getNodeStatus(this);
                if (this.getNameType() == 0x1D) {
                    for (final NetbiosAddress addr : addrs) {

        if (isDotQuadIP(calledName)) {
            calledName = NbtAddress.SMBSERVER_NAME;
        } else {
            final int i = calledName.indexOf('.');
            if (i > 1 && i < 15) {
                calledName = calledName.substring(0, i).toUpperCase();
            } else if (calledName.length() > 15) {
                calledName = NbtAddress.SMBSERVER_NAME;
            } else {
                calledName = calledName.toUpperCase();

                NbtAddress.ANY_HOSTS_NAME);
        assertEquals("\u0001\u0002__MSBROWSE__\u0002", NbtAddress.MASTER_BROWSER_NAME);
        assertEquals("*SMBSERVER     ", NbtAddress.SMBSERVER_NAME);

        // Test node type constants
        assertEquals(0, NbtAddress.B_NODE);
        assertEquals(1, NbtAddress.P_NODE);
        assertEquals(2, NbtAddress.M_NODE);
        assertEquals(3, NbtAddress.H_NODE);

            assertEquals(NbtAddress.SMBSERVER_NAME, uniAddress.nextCalledName(mockCIFSContext));
        }

        @Test
        void shouldReturnNullWhenInetAddressAndCalledNameIsAlreadySmbServerName() throws UnknownHostException {
            when(mockInetAddress.getHostName()).thenReturn("192.168.1.1"); // This will set calledName to SMBSERVER_NAME
            UniAddress uniAddress = new UniAddress(mockInetAddress);

        if (calledName == hostName.name) {
            calledName = SMBSERVER_NAME;
        } else if (calledName == SMBSERVER_NAME) {
            NbtAddress[] addrs;

            try {
                addrs = CLIENT.getNodeStatus(this);
                if (hostName.hexCode == 0x1D) {
                    for (final NbtAddress addr : addrs) {
                        if (addr.hostName.hexCode == 0x20) {