Re: Bug? Kernels 2.6.2x drops TCP packets over wireless (independent of card used)

From: Oliver Pinter
Date: Thu Feb 07 2008 - 09:24:07 EST

hmm, i think, the site is broken (193.219.28.140), and not the card or
the driver is wrong. when it does, then other sites are auch
reproductable ..

/* is use auch madwifi-0.9.3.3, but it think, it is not driver problem */

On 2/7/08, Marcin Koziej <marcinkoziej@xxxxx> wrote:
>
> Hello, I have problem with wireless network connectivity;
> I have tested this on two wireless cards, both giving same results:
> These are:
> 1) 02:00.0 Ethernet controller: Atheros Communications, Inc. AR5212
> 802.11abg NIC (rev 01)
> working under madwifi-0.9.3.3
> 2) 00:0a.0 Ethernet controller: Linksys, A Division of Cisco Systems
> [AirConn] INPROCOMM IPN 2220 Wireless LAN Adapter (rev 01)
> working under ndiswrapper on neti2220 driver
>
> On kernel 2.6.19 both cards are working fine (with same network
> configuration)
>
> Problems arise on kernels 2.6.2x, information below is from 2.6.23, but
> 2.6.24-rc8-git7 also was tested:
> Both cards can associate with ap, and get TCP/IP configuration from the
> router.
> Both cards can ping the router (0% packet loss), resolve hostnames using DNS
> (suggesting UDP is working fine).
> However, when any kind of TCP connection is made, it hangs after initial
> handshake and maybe some ammount of data interchanged. This is checked by
> tcpdump provided below.
>
> This happens every time to all tcp connections.
>
> Example with Atheros card:
> ath0 IEEE 802.11g ESSID:"hotspot" Nickname:""
> Mode:Managed Frequency:2.462 GHz Access Point: 00:60:B3:6C:A1:2E
>
> Bit Rate:11 Mb/s Tx-Power:17 dBm Sensitivity=1/1
> Retry:off RTS thr:off Fragment thr:off
> Power Management:off
> Link Quality=19/70 Signal level=-77 dBm Noise level=-96 dBm
> Rx invalid nwid:43882 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:0 Invalid misc:0 Missed beacon:0
>
>
> # ftp ftp.icm.edu.pl
> Connected to ftp.icm.edu.pl (193.219.28.140).
> 220-
> (hangs)
>
> The packet dump is:
> 23:56:08.807674 IP 192.168.1.2.51909 > sunsite2.icm.edu.pl.ftp: S
> 980196671:980196671(0) win 5840 <mss 1460,sackOK,timestamp 1971553
> 0,nop,wscale 5>
> 0x0000: 4500 003c 885e 4000 4006 124c c0a8 0102 E..<.^@.@..L....
> 0x0010: c1db 1c8c cac5 0015 3a6c 9d3f 0000 0000 ........:l.?....
> 0x0020: a002 16d0 d91a 0000 0204 05b4 0402 080a ................
> 0x0030: 001e 1561 0000 0000 0103 0305 ...a........
> 23:56:08.821639 IP sunsite2.icm.edu.pl.ftp > 192.168.1.2.51909: S
> 2723526584:2723526584(0) ack 980196672 win 5792 <mss 1460,sackOK,timestamp
> 983901832 1971553,nop,wscale 7>
> 0x0000: 4500 003c 0000 4000 3c06 9eaa c1db 1c8c E..<..@.<.......
> 0x0010: c0a8 0102 0015 cac5 a255 b7b8 3a6c 9d40 .........U..:l.@
> 0x0020: a012 16a0 1dfc 0000 0204 05b4 0402 080a ................
> 0x0030: 3aa5 2688 001e 1561 0103 0307 :.&....a....
> 23:56:08.821685 IP 192.168.1.2.51909 > sunsite2.icm.edu.pl.ftp: . ack 1 win
> 183
> <nop,nop,timestamp 1971567 983901832>
> 0x0000: 4500 0034 885f 4000 4006 1253 c0a8 0102 E..4._@.@..S....
> 0x0010: c1db 1c8c cac5 0015 3a6c 9d40 a255 b7b9 ........:l.@.U..
> 0x0020: 8010 00b7 62a3 0000 0101 080a 001e 156f ....b..........o
> 0x0030: 3aa5 2688 :.&.
> 23:56:08.842801 IP sunsite2.icm.edu.pl.ftp > 192.168.1.2.51909: P 1:7(6) ack
> 1
> win 46 <nop,nop,timestamp 983901837 1971567>
> 0x0000: 4510 003a 9135 4000 3c06 0d67 c1db 1c8c E..:.5@.<..g....
> 0x0010: c0a8 0102 0015 cac5 a255 b7b9 3a6c 9d40 .........U..:l.@
> 0x0020: 8018 002e f3af 0000 0101 080a 3aa5 268d ............:.&.
> 0x0030: 001e 156f 3232 302d 0d0a ...o220-..
> 23:56:08.843069 IP 192.168.1.2.51909 > sunsite2.icm.edu.pl.ftp: . ack 7 win
> 183
> <nop,nop,timestamp 1971588 983901837>
> 0x0000: 4510 0034 8860 4000 4006 1242 c0a8 0102 E..4.`@.@..B....
> 0x0010: c1db 1c8c cac5 0015 3a6c 9d40 a255 b7bf ........:l.@.U..
> 0x0020: 8010 00b7 6283 0000 0101 080a 001e 1584 ....b...........
> 0x0030: 3aa5 268d :.&.
> 23:56:31.920327 IP 192.168.1.2.51909 > sunsite2.icm.edu.pl.ftp: F 1:1(0) ack
> 7
> win 183 <nop,nop,timestamp 1994676 983901837>
> 0x0000: 4510 0034 8861 4000 4006 1241 c0a8 0102 E..4.a@.@..A....
> 0x0010: c1db 1c8c cac5 0015 3a6c 9d40 a255 b7bf ........:l.@.U..
> 0x0020: 8011 00b7 0852 0000 0101 080a 001e 6fb4 .....R........o.
> 0x0030: 3aa5 268d :.&.
> 23:56:31.935145 IP sunsite2.icm.edu.pl.ftp > 192.168.1.2.51909: . ack 2 win
> 46
> <nop,nop,timestamp 983907613 1994676>
> 0x0000: 4510 0034 913d 4000 3c06 0d65 c1db 1c8c E..4.=@.<..e....
> 0x0010: c0a8 0102 0015 cac5 a255 b8e5 3a6c 9d41 .........U..:l.A
> 0x0020: 8010 002e f124 0000 0101 080a 3aa5 3d1d .....$......:.=.
> 0x0030: 001e 6fb4 ..o.
> (no more packets)
>
>
> System:
> I am using Atheros Communications, Inc. AR5212 802.11abg NIC PCMCIA card.
> Computer is notebook, Acer Aspire 1520.
>
> I use vanilla kernel:
> Linux 2.6.23 #1 Sat Jan 12 12:07:39 CET 2008 i686 AMD Athlon(tm) 64
> Processor
> 3700+ AuthenticAMD GNU/Linux
> and madwifi driver ath_pci 0.9.4.5 (0.9.3.3)
> kernel options: irqpoll (without irqpoll system doesn't detect pcmcia
> cards).
>
> Device detection:
> ath_hal: module license 'Proprietary' taints kernel.
> ath_hal: 0.9.18.0 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
> ath_pci: 0.9.4.5 (0.9.3.3)
> ath_rate_sample: 1.2 (0.9.3.3)
> wifi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
> wifi0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps
> 24Mbps
> 36Mbps 48Mbps 54Mbps
> wifi0: turboG rates: 6Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
> wifi0: H/W encryption support: WEP AES AES_CCM TKIP
> wifi0: mac 5.9 phy 4.3 radio 4.6
> wifi0: Use hw queue 1 for WME_AC_BE traffic
> wifi0: Use hw queue 0 for WME_AC_BK traffic
> wifi0: Use hw queue 2 for WME_AC_VI traffic
> wifi0: Use hw queue 3 for WME_AC_VO traffic
> wifi0: Use hw queue 8 for CAB traffic
> wifi0: Use hw queue 9 for beacons
> wifi0: Atheros 5212: mem=0x34000000, irq=11
>
> On the same irq are:
> ehci_hcd:usb1
> eth0
> uhci_hcd:usb4
> wifi%d
> yenta
>
> Please CC me in reply, since I'm not subscribed to the list.
> If more debug information is needed please don't hesitate to ask.
>
> Best regards,
> Marcin Koziej
>
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--
Thanks,
Oliver
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