+ ",parameterCount=" + this.parameterCount + ",parameterOffset=" + this.parameterOffset + ",parameterDisplacement="
                + this.parameterDisplacement + ",dataCount=" + this.dataCount + ",dataOffset=" + this.dataOffset + ",dataDisplacement="

            if (totalParameterCount - parameterDisplacement > 0) {
                pad = parameterOffset % PADDING_SIZE;
                pad = pad == 0 ? 0 : PADDING_SIZE - pad;
                parameterOffset += pad;
            }

            // caclulate parameterDisplacement before calculating new parameterCount
            parameterDisplacement += parameterCount;

            return bufDataStart;
        }

        byte[] getTxnBuf() {
            return txn_buf;
        }

        int getParameterDisplacement() {
            return parameterDisplacement;
        }

        int getDataDisplacement() {
            return dataDisplacement;
        }

        int getParameterOffset() {
            return parameterOffset;
        }

        return (super.toString() + ",totalParameterCount=" + totalParameterCount + ",totalDataCount=" + totalDataCount + ",parameterCount="
                + parameterCount + ",parameterOffset=" + parameterOffset + ",parameterDisplacement=" + parameterDisplacement + ",dataCount="
                + dataCount + ",dataOffset=" + dataOffset + ",dataDisplacement=" + dataDisplacement + ",setupCount=" + setupCount + ",pad="
                + pad + ",pad1=" + pad1);
    }

            if (this.totalParameterCount - this.parameterDisplacement > 0) {
                this.pad1 = this.pad(this.parameterOffset);
                this.parameterOffset += this.pad1;
            }

            // caclulate parameterDisplacement before calculating new parameterCount
            this.parameterDisplacement += this.parameterCount;

                "parameterOffset should be written correctly");
        assertEquals(smbComNtTransaction.parameterDisplacement, SmbComTransaction.readInt4(dst, 19),
                "parameterDisplacement should be written correctly");
        assertEquals(smbComNtTransaction.dataCount, SmbComTransaction.readInt4(dst, 23), "dataCount should be written correctly");

        // parameterCount = 5
        writeInt4(5, buffer, bufferIndex);
        bufferIndex += 4;
        // parameterOffset = 30
        writeInt4(30, buffer, bufferIndex);
        bufferIndex += 4;
        // parameterDisplacement = 0
        writeInt4(0, buffer, bufferIndex);
        bufferIndex += 4;
        // dataCount = 15
        writeInt4(15, buffer, bufferIndex);
        bufferIndex += 4;
        // dataOffset = 40

        this.parameterCount = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.parameterOffset = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.parameterDisplacement = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        setDataCount(SMBUtil.readInt4(buffer, bufferIndex));
        bufferIndex += 4;
        this.dataOffset = SMBUtil.readInt4(buffer, bufferIndex);

        bufferIndex += 4;
        parameterCount = readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        parameterOffset = readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        parameterDisplacement = readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        dataCount = readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        dataOffset = readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        dstIndex += 4;
        writeInt4(parameterCount == 0 ? 0 : parameterOffset, dst, dstIndex);
        dstIndex += 4;
        if (command == SMB_COM_NT_TRANSACT_SECONDARY) {
            writeInt4(parameterDisplacement, dst, dstIndex);
            dstIndex += 4;
        }
        writeInt4(dataCount, dst, dstIndex);
        dstIndex += 4;
        writeInt4(dataCount == 0 ? 0 : dataOffset, dst, dstIndex);
        dstIndex += 4;