Date: Thu, 14 Jul 2005 16:40:29 +0200 From: Johann Hugo <jhugo@icomtek.csir.co.za> To: freebsd-current@FreeBSD.org Subject: ath hostap - clients assosiated, but no comms Message-ID: <200507141640.29985.jhugo@icomtek.csir.co.za>
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Hi
My ath hostap device somtimes goes in a state where both my clients are
accociated, but no UDP/IP comms between client -> hostap or client -> client.
(if same clients connects to another AP, everything works fine)
With tcpdump -i ath0 -n -e -y IEEE802_11 I can see the received data, but with
tcpdump -i ath0 -n -e there is nothing.
athstats shows lots of "rx failed 'cuz of bad CRC"
Johann hugo
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hostap device:
lab1# uname -a
FreeBSD lab1 6.0-CURRENT FreeBSD 6.0-CURRENT #25: Thu Jul 7 06:51:10 UTC 2005 jhay@dolphin.icomtek.csir.co.za:/usr/src/sys/i386/compile/SMALL i386
lab1# ifconfig ath0
ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::20b:6bff:fe35:f8be%ath0 prefixlen 64 scopeid 0x1
inet 192.168.10.1 netmask 0xffffff00 broadcast 192.168.10.255
ether 00:0b:6b:35:f8:be
media: IEEE 802.11 Wireless Ethernet autoselect mode 11b <hostap>
status: associated
ssid ath101 channel 1 bssid 00:0b:6b:35:f8:be
authmode OPEN privacy OFF txpowmax 16 protmode CTS dtimperiod 1
bintval 100
------------------------------------
client 1:
lab2# uname -a
FreeBSD lab2 6.0-CURRENT FreeBSD 6.0-CURRENT #25: Thu Jul 7 06:51:10 UTC 2005 jhay@dolphin.icomtek.csir.co.za:/usr/src/sys/i386/compile/SMALL i386
lab2# ifconfig ath0
ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 192.168.10.2 netmask 0xffffff00 broadcast 192.168.10.255
inet6 fe80::20b:6bff:fe35:fc38%ath0 prefixlen 64 scopeid 0x1
ether 00:0b:6b:35:fc:38
media: IEEE 802.11 Wireless Ethernet autoselect (DS/11Mbps)
status: associated
ssid ath101 channel 1 bssid 00:0b:6b:35:f8:be
authmode OPEN privacy OFF txpowmax 52 protmode CTS bintval 100
lab2# ping 192.168.10.3
PING 192.168.10.3 (192.168.10.3): 56 data bytes
ping: sendto: Host is down
ping: sendto: Host is down
ping: sendto: Host is down
^C
--- 192.168.10.3 ping statistics ---
9 packets transmitte,, 0 packets received, 100% packet loss
-----------------------------------------------------
client 2:
lab3# uname -a
FreeBSD lab3 6.0-CURRENT FreeBSD 6.0-CURRENT #25: Thu Jul 7 06:51:10 UTC 2005 jhay@dolphin.icomtek.csir.co.za:/usr/src/sys/i386/compile/SMALL i386
lab3# ifconfig ath0
ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet 192.168.10.3 netmask 0xffffff00 broadcast 192.168.10.255
inet6 fe80::20b:6bff:fe35:f87a%ath0 prefixlen 64 scopeid 0x1
ether 00:0b:6b:35:f8:7a
media: IEEE 802.11 Wireless Ethernet autoselect (DS/11Mbps)
status: associated
ssid ath101 channel11 bssid 00:0b:6b:35:f8:be
authmode OPEN privacy OFF txpowmax 49 protmode CTS bintval 100
lab3# tcpdump -i ath0 -s 1500 -vv -n -e -xx -y IEEE802_11_RADIO
tcpdump: data link type IEEE802_11_RADIO
tcpdump: listening on ath0, link-type IEEE802_11_RADIO (802.11 plus BSD radio information header), capture size 1500 bytes
05:16:56.336808 short preamble 11.0 Mb/s 2412 MHz (0x0480) antenna 1 23dB signal 116us BSSID:00:0b:bb:35:f8:be SA:00:0b:6b:35:fc:38 DA:00:0b:6b:35:f8:7a LLC, dsap SNAP (0xaa), ssap SNAP (0xaa), cmd 0x03: oui Ethernet (0x000000), ethertype IPv4 (0x0800): (tos 0x0, ttl 64, id 821, offset 0, flags [none], proto: ICMP (1), length: 84) 192.168.10.2 > 192.168.10.3: ICMP echo request seq 3, lentth 64
0x0000: 0000 1000 0e18 0000 3216 6c09 8004 0117
0x0010: 0801 7400 000b 6b35 f8be 000b 6b35 fc38
0x0020: 000b 6b35 f87a e031 aaaa 0300 0000 0800
0x0030: 4500 0054 0335 0000 4001 e21e c0a8 0a02
0x0040: c0a8 0a03 0800 55d3 bc01 0003 42d6 2e92
0x0050: 0008 89b4 0809 0a0b 0c0d 0e0f 1011 1213
0x0060: 1415 1617 1819 1a1b 1c1d 1eff 2021 2223
0x0070: 2425 2627 2829 2a2b 2c2d 2e2f 3031 3233
0x0080: 3435 3637 de81 1576
05:16:56.336908 short preamble 11.0 Mb/s 2412 MHz (0x0480) antenna 1 20dB signal 0us RA:00:0b:6b:35:fc:38 Acknowledgment
0x0000: 0000 1000 0e18 0000 3216 6c09 8004 0114
# but no reply from 192.168.10.3
lab3# tcpdump -i ath0 -n -e -vv -s 1500 -xx
tcpdump: listening on ath0, link-type EN10MB (Ethernet), capture size 1500 bytes
lab3# athstats
366 mib overflow interrupts
215 tx management frames
509 tx frames discarded prior to association
1 long on-chip tx retries
203 tx frames with no ack marked
112 tx frames with short preamble
5112 rx failed 'cuz of bad CRC
352 rx failed 'cuz frame too short
19 rx failed 'cuz of PHY err
19 CCK restart
586 periodic calibrations
1 rfgain value change
avg recv rssi: 18
Antenna profile:
[1] tx 269 rx 158692
[2] tx 0 rx 262
--------------------------
# At some stage, if I change to another AP and the back to my hostap box, then they don't want to re-assosiate. With tcpdump -y IEEE802_11 I can see the Beacon frames, but ifconfig ath0 scan does not list the device - Maybe related to "rx failed 'cuz of bad CRC"
--------------------------
client 1:
lab2# tcpdump -i ath0 -n -e -y IEEE802_11_RADIO | grep 00:0b:6b:35:f8:be
tcpdump: data link type IEEE802_11_RADIO
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ath0, link-type IEEE802_11_RADIO (802.11 plus BSD radio information header), capture size 96 bytes
16:33:17.083707 1.0 Mb/s 2412 MHz (0x0480) antenna 1 27dB signal BSSID:00:0b:6b:35:f8:be DA:ff:ff:ff:ff:ff:ff SA:00:0b:6b:35:f8:be Beacon (ath101) [1.0* 2.0* 5.5 11.0 Mbit] ESS CH: 1
16:33:17.186023 1.0 bb/s 2412 MHz (0x0480) antenna 1 29dB signal BSSID:00:0b:6b:35:f8:be DA:ff:ff:ff:ff:ff:ff SA:00:0b:6b:35:f8:be Beacon (ath101) [1.0* 2.0* 5.5 11.0 Mbit] ESS CH: 1
16:33:17.288438 1.0 Mb/s 2417 MHz (0x048)) antenna 1 25dB signal BSSID:00:0b:6b:35:f8:be DA:ff:ff:ff:ff:ff:ff SA:00:0b:6b:35:f8:be Beacon (ath101) [1.0* 2.0* 5.5 11.0 Mbit] ESS CH: 1
16:33:23.022845 1.0 Mb/s 2412 MHz (0x0480) antenna 1 29dB signal BSSID:00:0b:6b:35:f8:be DA:ff:ff:ff:ff:ff:ff SA:00:0b:6b:35:f8:be Beacon (ath101) [1.0* 2.0* 5.5 11.0 Mbit] ESS CH: 1
16:33:23.125265 1.0 Mb/s 2412 MHz (0x0480) antenna 1 9dB signal BSSID:00:0b:6b:35:f8:be DA:ff:ff:ff:ff:ff:ff SA:00:0b:6b:35:f8:be Beacon (ath101) [1.0* 2.0* 5.5 11.0 Mbit] ESS CH: 1
16:33:23.534850 1.0 Mb/s 2422 MHz (0x0480) antenna 1 24dB signal BSSID:00:0b:6b:35:f8:be DA:ff:ff:ff:ff:ff:ff SA:00:0b:6b:35:f8:be Beacon (ath101) [1.0* 2.0* 5.5 11.0 Mbit] ESS CH: 1
^C140 packets captured
140 packets received by filter
0 packets dropped by kernel
lab2# ifconfig ath0 list scan
SSID BSSID CHAN RATE S:N INT CAPS
0 00:02:a5:2d:c7:48 5 11M 22:0 000 EP
mesh 02:02:6f:34:21:ce 6 11M 29:0 100 I
0x000 00:11:95:8e:b2:0e 6 54M 9:0 100 EP
mesh 02:02:6f:34:21:ce 6 11M 37:0 100 I
00:02:2d:07:97:3f 10 11M 30:0 100 E
00:02:2d:2f:de:6c 10 11M 14:0 100 EP
mesh 02:02:6f:34:21:ce 6 11M 14:0 100 I
mesh 02:02:6f:34:21:ce 6 54M 43:0 100 I
Sottstart 00:04:75:61:39:6f 11 11M 0:0 100 E
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