On Mon, Jul 3, 2017 at 7:12 PM, Sun Paul <paulrbk@xxxxxxxxx> wrote:
> also, how to determine it is OOTB packet?
can you use systemtap on the host sending abort chunk ?
# stap --all-modules -v -e 'probe
module("sctp").function("sctp_make_abort").call{print_backtrace();println("");}'
So that we can see how the abort chunk is caused.
>
> On Mon, Jul 3, 2017 at 10:56 AM, Sun Paul <paulrbk@xxxxxxxxx> wrote:
>> we found lots of entries when issue netstat command. seems the OS IP
>> stack level have issue. anyone faced this before?
>>
>> sctp 1540 0 192.168.220.115:3868 172.10.116.169:3868
>> LISTEN
>> 192.168.220.123 172.10.116.170
>> sctp 1540 0 192.168.220.115:3868 172.10.116.173:3868
>> LISTEN
>> 192.168.220.123 172.10.116.174
>> sctp 1540 0 192.168.220.115:3868 172.10.116.169:3868
>> LISTEN
>> 192.168.220.123 172.10.116.170
>> sctp 1540 0 192.168.220.115:3868 172.10.116.173:3868
>> LISTEN
>> 192.168.220.123 172.10.116.174
>> sctp 1540 0 192.168.220.115:3868 172.10.116.169:3868
>> LISTEN
>> 192.168.220.123 172.10.116.170
>> sctp 1540 0 192.168.220.115:3868 172.10.116.173:3868
>> LISTEN
>> 192.168.220.123 172.10.116.174
>> sctp 1540 0 192.168.220.115:3868 172.10.116.169:3868
>> LISTEN
>> 192.168.220.123 172.10.116.170
>> sctp 1540 0 192.168.220.115:3868 172.10.116.173:3868
>> LISTEN
>> 192.168.220.123 172.10.116.174
>> sctp 1540 0 192.168.220.115:3868 172.10.116.169:3868
>> LISTEN
>> 192.168.220.123 172.10.116.170
>> sctp 1540 0 192.168.220.115:3868 172.10.116.173:3868
>> LISTEN
>> 192.168.220.123 172.10.116.174
>> sctp 1540 0 192.168.220.115:3868 172.10.116.173:3868
>> LISTEN
>> 192.168.220.123 172.10.116.174
>> sctp 1540 0 192.168.220.115:3868 172.10.116.173:3868
>> LISTEN
>> 192.168.220.123 172.10.116.174
>>
>> On Sun, Jul 2, 2017 at 1:47 AM, Marcelo <marcelo.leitner@xxxxxxxxx> wrote:
>>> Means out of the blue below.
>>> Your stats are interesting, you have expired cookies and also bad checksum.
>>>
>>>
>>> Em 1 de julho de 2017 14:29:56 BRT, Sun Paul <paulrbk@xxxxxxxxx> escreveu:
>>>>OOTB means?
>>>>
>>>>and below figure is the /proc/net/sctp/snmp, any idea
>>>>
>>>>$ cat /proc/net/sctp/snmp
>>>>SctpCurrEstab 0
>>>>SctpActiveEstabs 26061
>>>>SctpPassiveEstabs 204235
>>>>SctpAborteds 811874
>>>>SctpShutdowns 196524
>>>>SctpOutOfBlues 19104636
>>>>SctpChecksumErrors 3070
>>>>SctpOutCtrlChunks 3515894374
>>>>SctpOutOrderChunks 43687436
>>>>SctpOutUnorderChunks 5244253158
>>>>SctpInCtrlChunks 3820268182
>>>>SctpInOrderChunks 2553760409
>>>>SctpInUnorderChunks 2741444705
>>>>SctpFragUsrMsgs 197031085
>>>>SctpReasmUsrMsgs 207379860
>>>>SctpOutSCTPPacks 6407590023
>>>>SctpInSCTPPacks 6719200223
>>>>SctpT1InitExpireds 18041179
>>>>SctpT1CookieExpireds 365
>>>>SctpT2ShutdownExpireds 486
>>>>SctpT3RtxExpireds 4543012
>>>>SctpT4RtoExpireds 0
>>>>SctpT5ShutdownGuardExpireds 2
>>>>SctpDelaySackExpireds 2595840671
>>>>SctpAutocloseExpireds 0
>>>>SctpT3Retransmits 4527700
>>>>SctpPmtudRetransmits 3341
>>>>SctpFastRetransmits 4155577
>>>>SctpInPktSoftirq 6711421746
>>>>SctpInPktBacklog 7744553
>>>>SctpInPktDiscards 19253619
>>>>SctpInDataChunkDiscards 4248038
>>>>
>>>>On Sun, Jul 2, 2017 at 1:11 AM, Marcelo Ricardo Leitner
>>>><marcelo.leitner@xxxxxxxxx> wrote:
>>>>> Hi,
>>>>>
>>>>> On Sun, Jul 02, 2017 at 01:02:36AM +0800, Sun Paul wrote:
>>>>>> Hi
>>>>>>
>>>>>> we have a setup that running normal, however, we found that some of
>>>>>> the conenctions are not able to establish and we (server) send ABORT
>>>>>> right after receiving COOKIE_ECHO.
>>>>>>
>>>>>> any idea?
>>>>>
>>>>> Several reasons.. if it's not triggering a duplicate cookie
>>>>processing,
>>>>> it's being processed on sctp_sf_do_5_1D_ce(). Have a look at it to
>>>>have
>>>>> a better idea. Two reasons that stands out are somehow the cookie was
>>>>> interpreted as an OOTB packet or the tcp-style listening socket got
>>>>its
>>>>> backlog full.
>>>>>
>>>>> It can also be due to an out of memory situation, which is not often
>>>>the
>>>>> case.
>>>>>
>>>>> OOTB packets are accounted for in netstat -s or /proc/net/sctp/snmp.
>>>>>
>>>>> Marcelo
>>>>>
>>>
>>> --
>>> Enviado de meu dispositivo Android com K-9 mail. Desculpe-me pela brevidade.
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