switch (this.sbuf[0] & 0xFF) {
            case SessionServicePacket.POSITIVE_SESSION_RESPONSE:
                if (log.isDebugEnabled()) {
                    log.debug("session established ok with " + this.address);
                }
                return;
            case SessionServicePacket.NEGATIVE_SESSION_RESPONSE:
                final int errorCode = this.in.read() & 0xFF;
                switch (errorCode) {

            e.fileNameLength = readInt4(buffer, bufferIndex + 60);
            //      e.eaSize = readInt4( buffer, bufferIndex + 64 );
            //      e.shortNameLength = buffer[bufferIndex + 68] & 0xFF;

            /* With NT, the shortName is in Unicode regardless of what is negotiated.
             */

            //      e.shortName = readString( buffer, bufferIndex + 70, e.shortNameLength );

        });
    }

    @Test
    void testReadLength_OutOfBounds() {
        // Length out of bounds
        InputStream s = new ByteArrayInputStream(new byte[] { (byte) 0x81, (byte) 0xFF }); // length 255
        assertThrows(IOException.class, () -> {
            ASN1Util.readLength(s, 200, false); // limit 200
        });
    }

    @Test
    @DisplayName("Decode unknown AvPair type as generic AvPair")
    void testDecodeUnknownType() throws CIFSException {
        byte[] data = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        int unknownType = 0xFF;
        byte[] avPairData = createAvPairData(unknownType, data);
        byte[] eolData = createEolData();

        byte[] fullData = new byte[avPairData.length + eolData.length];

        assertTrue(str.contains("errorCode=0"));
        assertTrue(str.contains("mid=1"));
    }

    @Test
    void testToStringUnknownCommand() {
        smb.command = (byte) 0xFF; // Unknown command
        smb.errorCode = 0;
        smb.mid = 1;
        String str = smb.toString();
        assertTrue(str.contains("command=UNKNOWN"));
    }

    void testDifferentFileIds() {
        // Given
        byte[] fileId1 = new byte[16];
        Arrays.fill(fileId1, (byte) 0x11);

        byte[] fileId2 = new byte[16];
        Arrays.fill(fileId2, (byte) 0xFF);

        byte[] fileId3 = new byte[16];
        for (int i = 0; i < 16; i++) {
            fileId3[i] = (byte) i;
        }

        // When & Then for each file ID
        testFileIdWriting(fileId1);

        @DisplayName("Should not modify destination buffer")
        void testWriteBytesWireFormatDoesNotModifyBuffer() {
            // Given
            byte[] dst = new byte[100];
            Arrays.fill(dst, (byte) 0xFF);
            byte[] originalDst = dst.clone();

            // When
            response.writeBytesWireFormat(dst, 0);

            // Then
            assertArrayEquals(originalDst, dst);
        }

        SMBUtil.writeTime(time, buffer, bufferIndex);
        bufferIndex += 8;
        // serverTimeZone
        buffer[bufferIndex++] = (byte) 0x80;
        buffer[bufferIndex++] = (byte) 0xFF;
        // encryptionKeyLength
        buffer[bufferIndex++] = 8;

        int bytesRead = response.readParameterWordsWireFormat(buffer, 0);
        assertEquals(34, bytesRead);

                    ci += n * 3;
                    System.arraycopy(SPACE_CHARS, 0, d, s, n);
                    break;
                }
                c[ci++] = ' ';
                i = src[srcIndex + si] & 0xFF;
                toHexChars(i, c, ci, 2);
                ci += 2;
                if (i < 0 || Character.isISOControl((char) i)) {
                    d[si % 16] = '.';
                } else {

        assertEquals(0, cap.getValue().length, "Optimistic token must be zero-length");
    }

    @ParameterizedTest
    @ValueSource(bytes = { 0x00, 0x7F, (byte) 0xFF })
    @DisplayName("initSecContext throws on invalid token type")
    void testInitSecContextInvalidTokenType(byte firstByte) throws Exception {
        SpnegoContext ctx = newContext();