Class SMB2_Write_Request

scapy/layers/smb2.py:3463–3523

class SMB2_Write_Request(_SMB2_Payload, _NTLMPayloadPacket):
    name = "SMB2 WRITE Request"
    Command = 0x0009
    OFFSET = 48 + 64
    _NTLM_PAYLOAD_FIELD_NAME = "Buffer"
    fields_desc = [
        XLEShortField("StructureSize", 0x31),
        LEShortField("DataBufferOffset", None),
        LEIntField("DataLen", None),
        LELongField("Offset", 0),
        PacketField("FileId", SMB2_FILEID(), SMB2_FILEID),
        LEIntEnumField(
            "Channel",
            0,
            {
                0x00000000: "SMB2_CHANNEL_NONE",
                0x00000001: "SMB2_CHANNEL_RDMA_V1",
                0x00000002: "SMB2_CHANNEL_RDMA_V1_INVALIDATE",
                0x00000003: "SMB2_CHANNEL_RDMA_TRANSFORM",
            },
        ),
        LEIntField("RemainingBytes", 0),
        LEShortField("WriteChannelInfoBufferOffset", None),
        LEShortField("WriteChannelInfoLen", None),
        FlagsField(
            "Flags",
            0,
            -32,
            {
                0x00000001: "SMB2_WRITEFLAG_WRITE_THROUGH",
                0x00000002: "SMB2_WRITEFLAG_WRITE_UNBUFFERED",
            },
        ),
        _NTLMPayloadField(
            "Buffer",
            OFFSET,
            [
                StrLenField("Data", b"", length_from=lambda pkt: pkt.DataLen),
                StrLenField(
                    "WriteChannelInfo",
                    b"",
                    length_from=lambda pkt: pkt.WriteChannelInfoLen,
                ),
            ],
        ),
    ]

    def post_build(self, pkt, pay):
        # type: (bytes, bytes) -> bytes
        return (
            _SMB2_post_build(
                self,
                pkt,
                self.OFFSET,
                {
                    "Data": 2,
                    "WriteChannelInfo": 40,
                },