IODWriteMultiple request
| 609 | |
| 610 | |
| 611 | class IODWriteMultipleReq(Block): |
| 612 | """IODWriteMultiple request""" |
| 613 | fields_desc = [ |
| 614 | BlockHeader, |
| 615 | ShortField("seqNum", 0), |
| 616 | UUIDField("ARUUID", None), |
| 617 | XIntField("API", 0xffffffff), |
| 618 | XShortField("slotNumber", 0xffff), |
| 619 | XShortField("subslotNumber", 0xffff), |
| 620 | StrFixedLenField("padding", "", length=2), |
| 621 | XShortEnumField("index", 0, IOD_WRITE_REQ_INDEX), |
| 622 | FieldLenField("recordDataLength", None, fmt="I", length_of="blocks"), |
| 623 | StrFixedLenField("RWPadding", "", length=24), |
| 624 | FieldListField("blocks", [], |
| 625 | PadFieldWithLen(PacketField("", None, IODWriteReq), 4), |
| 626 | length_from=lambda pkt: pkt.recordDataLength) |
| 627 | ] |
| 628 | # default values |
| 629 | block_type = 0x0008 |
| 630 | index = 0xe040 |
| 631 | API = 0xffffffff |
| 632 | slotNumber = 0xffff |
| 633 | subslotNumber = 0xffff |
| 634 | |
| 635 | def post_build(self, p, pay): |
| 636 | # patch the update of block_length, as requests field must not be |
| 637 | # included. block_length is always 60 |
| 638 | if self.block_length is None: |
| 639 | p = p[:2] + struct.pack("!H", 60) + p[4:] |
| 640 | |
| 641 | # Remove the final padding added in requests |
| 642 | fld, val = self.getfield_and_val("blocks") |
| 643 | if fld.i2count(self, val) > 0: |
| 644 | length = len(val[-1]) |
| 645 | pad = fld.field.padlen(length, self) |
| 646 | if pad > 0: |
| 647 | p = p[:-pad] |
| 648 | # also reduce the recordDataLength accordingly |
| 649 | if self.recordDataLength is None: |
| 650 | val = struct.unpack("!I", p[36:40])[0] |
| 651 | val -= pad |
| 652 | p = p[:36] + struct.pack("!I", val) + p[40:] |
| 653 | |
| 654 | return Packet.post_build(self, p, pay) |
| 655 | |
| 656 | def get_response(self): |
| 657 | """Generate the response block of this request. |
| 658 | Careful: it only sets the fields which can be set from the request |
| 659 | """ |
| 660 | res = IODWriteMultipleRes() |
| 661 | for field in ["seqNum", "ARUUID", "API", "slotNumber", |
| 662 | "subslotNumber", "index"]: |
| 663 | res.setfieldval(field, self.getfieldval(field)) |
| 664 | |
| 665 | # append all block response |
| 666 | res_blocks = [] |
| 667 | for block in self.getfieldval("blocks"): |
| 668 | res_blocks.append(block.get_response()) |
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