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Ethernet module User’s Manual
Appendix G Change/correction function in a firmware
G
G.3 Revision L
Here, the item corrected by the firmware revision L is explained.
The firmware revision L is introduced from the product after the serial number
"04400001" of EN311.
Also in EN311 to which the serial number before "04400001" is attached, when the seal
of "L" is stuck on the end of EN311 serial number, a firmware is upgrade ending at
Revision L.
Table G-3 Comparison of a firmware (before Revision L and Revision L)
No
1
The close request of a TCP half open state socket
Revision L
A TCP socket can be closed under the following conditions.
Before
Revision L
In the procedure for canceling the half open state of a TCP socket, there is a
case where it becomes impossible to close a socket under a certain
conditions.
The dissolution procedure of a half open state TCP socket.
The TCP socket of EN311 remains in the half open state.
A RST packet is received from a partner node.
The "RCLOSE" bit turns on the socket status of a TCP socket.
A socket close request is published from T3H to EN311.
A TCP socket closes.
• The conditions it becomes impossible to close a socket.
(1)
The window size notified from the partner node. (Immediately before the
socket changed into the half open state.)
(2)
The sum total of the data size of which the socket from T3H required
transmission after the socket changed into the half open state.
It becomes impossible to close a socket in the state where the relation
between the size of (1) and the size of (2) in (1) < (2) has become.
When a socket close request is published to EN311, it becomes impossible to
close a socket in the state where the size of the above (2) is larger than the
size of (1).
When this phenomenon occurs in the firmware before Revision L, please
reset EN311 module (from T3H to reset request issue).
Manufacture year/month (April, 2004 is expressed)
The contents of a serial number
04400001
The reference number in the April, 2004 production lot
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