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| author |   Wei Yongjun <yjwei@nanjing-fnst.com> | 2006-07-30 20:35:54 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2006-08-02 13:38:19 -0700 |
| commit | 3687b1dc6fe83a500ba4d3235704594f6a111a2d (patch) | |
| tree | d57932b49d53234ea5daf2f2cbe780a8c347a1ad /include/net/netevent.h | |
| parent | [TCP]: fix memory leak in net/ipv4/tcp_probe.c::tcpprobe_read() (diff) | |
| download | linux-dev-3687b1dc6fe83a500ba4d3235704594f6a111a2d.tar.xz linux-dev-3687b1dc6fe83a500ba4d3235704594f6a111a2d.zip | |
[TCP]: SNMPv2 tcpAttemptFails counter error
Refer to RFC2012, tcpAttemptFails is defined as following:
tcpAttemptFails OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times TCP connections have made a direct
transition to the CLOSED state from either the SYN-SENT
state or the SYN-RCVD state, plus the number of times TCP
connections have made a direct transition to the LISTEN
state from the SYN-RCVD state."
::= { tcp 7 }
When I lookup into RFC793, I found that the state change should occured
under following condition:
1. SYN-SENT -> CLOSED
a) Received ACK,RST segment when SYN-SENT state.
2. SYN-RCVD -> CLOSED
b) Received SYN segment when SYN-RCVD state(came from LISTEN).
c) Received RST segment when SYN-RCVD state(came from SYN-SENT).
d) Received SYN segment when SYN-RCVD state(came from SYN-SENT).
3. SYN-RCVD -> LISTEN
e) Received RST segment when SYN-RCVD state(came from LISTEN).
In my test, those direct state transition can not be counted to
tcpAttemptFails.
Signed-off-by: Wei Yongjun <yjwei@nanjing-fnst.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netevent.h')
0 files changed, 0 insertions, 0 deletions