Eric Dumazet a écrit :
Herbert Xu a écrit :
On Sat, Nov 10, 2007 at 11:48:54PM +0900, YOSHIFUJI Hideaki / 吉藤英明
wrote:
Hmm..... "netstat -s" from etch (i386) and etch (x86_64) work
fine for me. Same version, same architecture. Strange...
Interesting. What does your /proc/net/snmp file look like?
And what does netstat -s actually produce?
Thanks,
Quite easy :)
A failing one is > 1024 bytes :
Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors
ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests
OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails
FragOKs FragFails FragCreates
Ip: 2 64 6954137412 0 23489 0 125 0 6790615249 6423886499 2706 0 13881
164999330 1503683 34165124 1219558 188 54871924
Icmp: InMsgs InErrors InDestUnreachs InTimeExcds InParmProbs
InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps
InAddrMasks InAddrMaskReps OutMsgs OutErrors OutDestUnreachs
OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos
OutEchoReps OutTimestamps OutTimestampReps OutAddrMasks OutAddrMaskReps
Icmp: 6392743 1256162 3894707 401904 83 20702 172602 1415531 0 3 0 3 0
106773069 0 3894707 401904 83 20702 172602 1415531 0 3 0 3 0
IcmpMsg: InType3 InType4 InType5 InType8 InType11 InType12 InType13
InType17 OutType0 OutType3 OutType11 OutType14
IcmpMsg: 3894707 20702 172602 1415531 401904 83 3 3 1414557 105347007
11502 3
Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens
AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs
OutRsts
Tcp: 1 200 120000 -1 62967275 66063269 17969333 24912734 1278435
6041838336 5717892916 279078174 361708 35913131
Udp: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors
Udp: 640604836 101598293 193394 421746699 133903 0
UdpLite: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors
SndbufErrors
UdpLite: 0 0 0 0 0 0
So netstat fails because line 344 in statistics.c :
buf1=TcpExt: SyncookiesSent SyncookiesRecv SyncookiesFailed
EmbryonicRsts PruneCalled RcvPruned OfoPruned OutOfWindowIcmps
LockDroppedIcmps ArpFilter TW TWRecycled TWKilled PAWSPassive PAWSActive
PAWSEstab DelayedACKs DelayedACKLocked DelayedACKLost ListenOverflows
ListenDrops TCPPrequeued TCPDirectCopyFromBacklog
TCPDirectCopyFromPrequeue TCPPrequeueDropped TCPHPHits TCPHPHitsToUser
TCPPureAcks TCPHPAcks TCPRenoRecovery TCPSackRecovery TCPSACKReneging
TCPFACKReorder TCPSACKReorder TCPRenoReorder TCPTSReorder TCPFullUndo
TCPPartialUndo TCPDSACKUndo TCPLossUndo TCPLoss TCPLostRetransmit
TCPRenoFailures TCPSackFailures TCPLossFailures TCPFastRetrans
TCPForwardRetrans TCPSlowStartRetrans TCPTimeouts TCPRenoRecoveryFail
TCPSackRecoveryFail TCPSchedulerFailed TCPRcvCollapsed TCPDSACKOldSent
TCPDSACKOfoSent TCPDSACKRecv TCPDSACKOfoRecv TCPAbortOnSyn
TCPAbortOnData TCPAbortOnClose TCPAbortOnMemory TCPAbortOnTimeout
TCPAbortOnLinger TCPAbortFailed TCPMemoryPressures TCPSACKDiscard
TCPDSACKIgnoredOld TCPDSACKIgnoredNoUndo buf2= TCPSpuriousRTOs
So this is an existing kernel bug, not related to UDPlite
I meant a netstat bug of course, sorry :(
It fails to parse /proc/net/netstat , because TcpExt line is bigger than 1024
chars.
To correct it, we might enlarge buf1[] and buf2[] from 1024 to 2048 in
statistics.c, process_fd() function.
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