// Write context header
        SMBUtil.writeInt4(16, dst, dstIndex); // Next (offset to next context, 0 for last)
        dstIndex += 4;

        SMBUtil.writeInt2(4, dst, dstIndex); // NameOffset (from start of context)
        dstIndex += 2;

        SMBUtil.writeInt2(4, dst, dstIndex); // NameLength
        dstIndex += 2;

        SMBUtil.writeInt2(0, dst, dstIndex); // Reserved
        dstIndex += 2;

        // Original message size
        SMBUtil.writeInt4(this.originalMessageSize, dst, dstIndex);
        dstIndex += 4;

        // Reserved (2 bytes)
        SMBUtil.writeInt2(0, dst, dstIndex);
        dstIndex += 2;

        // Flags (2 bytes)
        SMBUtil.writeInt2(this.flags, dst, dstIndex);
        dstIndex += 2;

        // Session ID (8 bytes)
        SMBUtil.writeInt8(this.sessionId, dst, dstIndex);

        // Verify FID values
        assertEquals(0x1111, SMBUtil.readInt2(dst1, 4));
        assertEquals(0x2222, SMBUtil.readInt2(dst2, 4));
        assertEquals(0x3333, SMBUtil.readInt2(dst3, 4));

        // Verify completion filters
        assertEquals(FILE_NOTIFY_CHANGE_FILE_NAME, SMBUtil.readInt4(dst1, 0));
        assertEquals(FILE_NOTIFY_CHANGE_DIR_NAME, SMBUtil.readInt4(dst2, 0));

        bufferIndex += 2;
        this.fileType = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        this.deviceState = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        this.action = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        this.serverFid = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 6;

        final int start = bufferIndex;
        this.chunksWritten = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.chunkBytesWritten = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.totalBytesWritten = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        return bufferIndex - start;
    }

        assertEquals(0, SMBUtil.readInt4(buffer, 0));

        // NameOffset field (2 bytes) - should be 16 (after header)
        assertEquals(16, SMBUtil.readInt2(buffer, 4));

        // NameLength field (2 bytes) - should be 4 for "RqLs"
        assertEquals(4, SMBUtil.readInt2(buffer, 6));

        // Reserved field (2 bytes) - should be 0
        assertEquals(0, SMBUtil.readInt2(buffer, 8));

        // Write context header
        SMBUtil.writeInt4(0, buffer, offset); // Next (offset to next context, 0 for last)
        offset += 4;

        SMBUtil.writeInt2(16, buffer, offset); // NameOffset (from start of context)
        offset += 2;

        SMBUtil.writeInt2(4, buffer, offset); // NameLength
        offset += 2;

        SMBUtil.writeInt2(0, buffer, offset); // Reserved
        offset += 2;

            SMBUtil.writeInt2(23, buffer, offset); // sa_family: AF_INET6
            SMBUtil.writeInt2(445, buffer, offset + 2); // sin6_port
            SMBUtil.writeInt4(0, buffer, offset + 4); // sin6_flowinfo
            System.arraycopy(address.getAddress(), 0, buffer, offset + 8, 16); // sin6_addr
            SMBUtil.writeInt4(0, buffer, offset + 24); // sin6_scope_id
        } else {

        final int structureSize = SMBUtil.readInt2(buffer, bufferIndex);
        if (structureSize != 9) {
            throw new SMBProtocolDecodingException("Structure size != 9");
        }

        this.sessionFlags = SMBUtil.readInt2(buffer, bufferIndex + 2);
        bufferIndex += 4;

        final int securityBufferOffset = SMBUtil.readInt2(buffer, bufferIndex);

        final int start = dstIndex;

        SMBUtil.writeInt2(this.fid, dst, dstIndex);
        dstIndex += 2;

        dst[dstIndex] = this.typeOfLock;
        dst[dstIndex + 1] = this.newOpLockLevel;
        dstIndex += 2;

        SMBUtil.writeInt4(this.timeout, dst, dstIndex);
        dstIndex += 4;

        SMBUtil.writeInt2(this.unlocks != null ? this.unlocks.length : 0, dst, dstIndex);