Teledyne LeCroy FireInspector - Users Manual - Manual (Page 76)

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CATC F IRE I NSPECTOR 2.01 C HAPTER 5
User’s ManualCATC Trace Fil es
View Type Fields in HAVi Transaction Rows
The Frag Type fields in HAVi transaction rows contain a View Fields command that allows
you to see the contents of the data structures.
Left-click* on the field header to access the cell context menu, which contains the View
Fields commands. Selecting the command opens a View Fields dialog, which contains the
data laid out according to the HAVi specification.
*If the option Right click cell context menu is checked on the General tab of the Display Options dialog,
then the cell context menu is opened by right-clicking. See Section 5.1.1, “General Display Options” on
page 42 for more information.
For more information about the View Fields dialog, please see “View Fields Dialog” on
page 75.
This is the field that contains View Fields options:
• Frag Type: contains the fields of the HAVi fragment.
Internet Protocol version 4 Over 1394 (IP or IPv4/1394) Transactions
FireInspector decodes broadcast or multicast datagrams, unicast datagrams, multicast
channel allocation protocol (MCAP) and address resolution protocol (ARP) requests in
IPv4/1394.
FireInspector also groups together fragments when decoding IP. Any IP datagram
transmitted over 1394 is encapsulated and may be fragmented if it is too large to be
transmitted in a single transaction. The link fragment (LF) field in the encapsulation header
indicates whether the IPv4/1394 transaction is a fragment. LF values of 1, 2, or 3 indicate
that a transaction is a First, Last, or Interior fragment, respectively. When the LF field is set
to one of these values, FireInspector displays the LF field in the Trace, along with the
datagram_size and DGL (datagram label) fields. Additionally, the fragment_offset field is
displayed for Interior and Last fragments. MCAP and ARP requests cannot be fragmented.
Table 5-7: Fields in IP transaction rows
Field Headings Description
Datagram This field is displayed if the datagram’s ether_type field value is
0x0800.
Possible values for the Datagram field:
Unicast — the underlying packet is an asynchronous write data block
or an isochronous stream
Broad/Multi — the underlying packet is a GASP
Fragment — the datagram’s link fragment (LF) field has a value of
0x01 (First), 0x02 (Last), or 0x03 (Interior).
ARP This field is displayed if the datagram’s ether_type field value is
0x0806.
MCAP This field is displayed if the datagram’s ether_type field value is
0x8861.
Source The value of the source_id field of the underlying packet.