text
stringlengths
0
99.6k
<--------------- Tr Resume Download
Fr ---------------> Resume failed
DR = 0x02:
TD ---------------> Download Request
<--------------- Tr Resume Download
Tf ---------------> CRC mismatched
<--------------- ACK Transfer entire
N ---------------> Data
...
TC ---------------> End of transfer
UR = 0x01 or 0x02:
Tu ---------------> Upload Resume
<-------------- N CRC Matched
...
<-------------- TC End of transfer
UR = 0x01:
Tu ---------------> Upload Resume
<--------------- Fr CRC mismatch
UR = 0x02:
Tu ---------------> Upload Resume
<--------------- Tf CRC mismatch
ACK---------------> Transfer entire
FIle
<--------------- N Data
...
<--------------- TC End of transfer
14
4) Packet `TI' : File Information.
The `TI' Packet is transmitted by the File Sender, provided
that both entities have their Transport Parameter FI > 0x00.
It is used to convey specific data concerning the file as it
exists on the Sending entity. The format of the `TI' Packet
is as follows:
<Lead-in> <Sequence> T I <data type> <compression >
<file length> <creation date> <creation time>
<modification date> <modification time>
<true name length> <true name> <Trailer>
where:
<data type> : A = ASCII, B = Binary.
<compression> : Specifies how the file is compressed
during transmission (has nothing to do
with the content of the file).
0x00 = not compressed
(other values reserved for
future use by CompuServe)
<file length> : Current length of the file being sent.
(Actual number of file data bytes being
sent, not the number of compressed
bytes). This value is passed for display
display or media check only.
<zone> : Minutes offset from UCT of Sender.
<creation date> : Date the file was created.
ASCII decimal string, yyyymmdd
<creation time> : Time of day the file was created.
ASCII decimal string, seconds
since midnight.
<modification date> : Date the file was last modified.
Same format as <creation date>.
(`0' if unknown)
<modification time> : Time of day the file was last
modified. Same format as
<creation time>. (`0' if unknown)
<true name length> : Number of bytes in <true name>.
(This is a single binary byte.)
<true name> : The actual file name with any device,
directory, or other ancillary information
removed.
It is not necessary that all fields be transmitted.
15
A sample TI packet (file information only) is: