PROBLEM: ESTABLISHED connections turn status to CLOSE_WAIT

From: Sebastian Epple
Date: Sun Nov 07 2004 - 07:27:25 EST

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Problem: ESTABLISHED connections turn status to CLOSE_WAIT

Description:
We run psyBNC software on 2.4 kernels without any problems.
On kernel 2.6.8.1 all connections psyBNC establishes turn status to CLOSE_WAIT (I figured out that this occurs after something does not work regular, e.g. some nameserver or irc server is not responsing or the server gets a denial of service attack.)
All connections of the process turn to CLOSE_WAIT, a SIGHUP does not help, just restarting the psyBNC software does help.

Keywords: TCP/IP, Sockets, Networking

ra:~# cat /proc/version
Linux version 2.6.8.1-ha-lc (root@newnew) (gcc version 2.95.4 20011002 (Debian prerelease)) #1 Sun Oct 17 19:07:39 CEST 2004

Example program is psyBNC2.3.2-4, available at http://www.psychoid.net/

ra:~# sh ./ver_linux
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.

Linux ra 2.6.8.1-ha-lc #1 Sun Oct 17 19:07:39 CEST 2004 i686 GNU/Linux

Gnu C 3.3.4
Gnu make 3.80
util-linux 2.12
mount 2.12
modutils 2.4.26
e2fsprogs 1.35
xfsprogs 2.6.20
Linux C Library 2.3.2
Dynamic linker (ldd) 2.3.2
Procps 3.2.1
Net-tools 1.60
Console-tools 0.2.3
Sh-utils 5.2.1

ra:~# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 2.40GHz
stepping : 7
cpu MHz : 2412.580
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips : 4767.74

The kernel was built without module support for security reasons.

ra:~# cat /proc/ioports
0000-001f : dma1
0020-0021 : pic1
0040-005f : timer
0060-006f : keyboard
0070-0077 : rtc
0080-008f : dma page reg
00a0-00a1 : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
02f8-02ff : serial
0376-0376 : ide1
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial
0cf8-0cff : PCI conf1
4000-407f : 0000:00:1f.0
4080-40bf : 0000:00:1f.0
5000-501f : 0000:00:1f.3
c000-c0ff : 0000:01:05.0
c000-c0ff : 8139too
c400-c43f : 0000:01:05.1
d000-d01f : 0000:00:1d.1
d400-d41f : 0000:00:1d.2
d800-d81f : 0000:00:1d.0
e000-e0ff : 0000:00:1f.5
e400-e43f : 0000:00:1f.5
f000-f00f : 0000:00:1f.1
f000-f007 : ide0
f008-f00f : ide1

ra:~# cat /proc/iomem
00000000-0009ffff : System RAM
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-3f7effff : System RAM
00100000-002fdcdf : Kernel code
002fdce0-003a9dff : Kernel data
3f7f0000-3f7f2fff : ACPI Non-volatile Storage
3f7f3000-3f7fffff : ACPI Tables
3f800000-3fffffff : reserved
40000000-400003ff : 0000:00:1f.1
d0000000-dfffffff : 0000:00:00.0
e0000000-e7ffffff : 0000:00:02.0
e8000000-e80000ff : 0000:01:05.0
e8000000-e80000ff : 8139too
e8100000-e817ffff : 0000:00:02.0
e8180000-e81803ff : 0000:00:1d.7
e8181000-e81811ff : 0000:00:1f.5
e8182000-e81820ff : 0000:00:1f.5
fec00000-ffffffff : reserved

ra:~# lspci -vvv
0000:00:00.0 Host bridge: Intel Corp. 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 03)
Subsystem: Giga-byte Technology GA-8PE667 Ultra
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
Latency: 0
Region 0: Memory at d0000000 (32-bit, prefetchable) [size=256M]
Capabilities: [e4] #09 [1105]

0000:00:02.0 VGA compatible controller: Intel Corp. 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 03) (prog-if 00 [VGA])
Subsystem: Giga-byte Technology: Unknown device 2562
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin A routed to IRQ 12
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M]
Region 1: Memory at e8100000 (32-bit, non-prefetchable) [size=512K]
Capabilities: [d0] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

0000:00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology: Unknown device 24c2
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin A routed to IRQ 12
Region 4: I/O ports at d800 [size=32]

0000:00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology: Unknown device 24c2
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin B routed to IRQ 5
Region 4: I/O ports at d000 [size=32]

0000:00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
Subsystem: Giga-byte Technology: Unknown device 24c2
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin C routed to IRQ 12
Region 4: I/O ports at d400 [size=32]

0000:00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI Controller (rev 02) (prog-if 20 [EHCI])
Subsystem: Giga-byte Technology: Unknown device 5006
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin D routed to IRQ 11
Region 0: Memory at e8180000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 82) (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR+
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: e8000000-e80fffff
Prefetchable memory behind bridge: fff00000-000fffff
BridgeCtl: Parity- SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-

0000:00:1f.0 ISA bridge: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) LPC Bridge (rev 02)
Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0

0000:00:1f.1 IDE interface: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) UltraATA-100 IDE Controller (rev 02) (prog-if 8a [Master SecP PriP])
Subsystem: Giga-byte Technology GA-8PE667 Ultra
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin A routed to IRQ 12
Region 0: I/O ports at <unassigned>
Region 1: I/O ports at <unassigned>
Region 2: I/O ports at <unassigned>
Region 3: I/O ports at <unassigned>
Region 4: I/O ports at f000 [size=16]
Region 5: Memory at 40000000 (32-bit, non-prefetchable) [size=1K]

0000:00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 02)
Subsystem: Giga-byte Technology GA-8PE667 Ultra
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin B routed to IRQ 5
Region 4: I/O ports at 5000 [size=32]

0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 02)
Subsystem: Giga-byte Technology GA-8PE667 Ultra
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin B routed to IRQ 5
Region 0: I/O ports at e000 [size=256]
Region 1: I/O ports at e400 [size=64]
Region 2: Memory at e8181000 (32-bit, non-prefetchable) [size=512]
Region 3: Memory at e8182000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

0000:01:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at c000 [size=256]
Region 1: Memory at e8000000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

0000:01:05.1 Modem: Realtek Semiconductor Co., Ltd. SmartLAN56 56K Modem (prog-if 00 [Generic])
Subsystem: Realtek Semiconductor Co., Ltd. SmartLAN56 56K Modem
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Interrupt: pin B routed to IRQ 9
Region 0: I/O ports at c400 [size=64]
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=55mA PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

Kernel was built without SCSI support.

--
Sebastian Epple

Epple IT - concept Together

Kesslerstr. 65-69
D-73765 Neuhausen

fon: +49 (0)7158 98115 - 3
fax: +49 (0)7158 98115 - 9

epple@xxxxxxxx
http://www.my-ct.de
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