Cards seeming connect but unable to route traffic?

Drew Dowling drewhead at drewhead.org
Mon May 3 18:21:55 EDT 2004


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I have a slackware box I decided to build into an AP.  I got a pair of
ALLNET cards (ALL0192 - PCMCIA and  ALL0191 - PCI cause they were dirt
cheap on ebay and seemed to be garenteed that I'd get a Prism2
based card) an threw the PCI in to the slackware server and the PCMCIA
into a IBM T30 with XP on it.

I have a custom kernel, 2.6.4.  hostapd-0.1.3, wireless_tools.26
built and seemingly woking.

> /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX
          inet addr:166.82.148.XX  Bcast:166.82.149.255 Mask:255.255.254.0
          inet6 addr: xxxx::xxx:xxxx:xxxx:xxx/xx Scope:Link
          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:37465 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8601 errors:0 dropped:0 overruns:0 carrier:1
          collisions:0 txqueuelen:1000 
          RX bytes:12493046 (11.9 Mb)  TX bytes:942044 (919.9 Kb)
          Interrupt:5 Base address:0xa400 

eth0:0    Link encap:Ethernet  HWaddr 00:A0:24:9F:07:52  
          inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:5 Base address:0xa400 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

wlan0     Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX
          inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: xxxx::xxx:xxxx:xxxx:xxxx/xx Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:2 overruns:0 frame:0
          TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:1126 (1.0 Kb)
          Interrupt:11 Memory:d0b18000-d0b19000 

> iwconfig
lo        no wireless extensions.

dummy0    no wireless extensions.

eth0      no wireless extensions.

sit0      no wireless extensions.

wlan0     IEEE 802.11b  ESSID:"drewhead_wap"  
          Mode:Master  Frequency:2.412GHz  Access Point: XX:XX:XX:XX:XX:XX  
          Bit Rate:11Mb/s   Sensitivity=1/3  
          Retry min limit:8   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:230  Rx invalid frag:0
          Tx excessive retries:7  Invalid misc:4   Missed beacon:0

last relevant bit of dmesg:

hostap_crypt: registered algorithm 'NULL'
hostap_pci: 0.1.3 - 2004-02-08 (Jouni Malinen <jkmaline at cc.hut.fi>)
hostap_pci: Registered netdevice wlan0
prism2_hw_init: initialized in 184 ms
wlan0: trying to read PDA from 0x007f0000: OK
wlan0: NIC: id=0x8013 v1.0.0
wlan0: PRI: id=0x15 v1.1.1
wlan0: STA: id=0x1f v1.7.4
wlan0: Intersil Prism2.5 PCI: mem=0xfb000000, irq=11
wlan0: no IPv6 routers present

Right now I'm just running wide open trying to get a connection
established and packets routing.  I'll worry about locking things down when
things are working.

When I stick the PCMCIA card in the ThinkPad it finds the AP (by ESSID)
and says it's connected.  I've given it a IP of 192.168.2.3, but pings
timeout (the AP box does respond to ICMP on eth0).  Furthermore the AP
seems to be able to find the laptop:

> iwlist scanning
lo        Interface doesn't support scanning : Operation not supported

dummy0    Interface doesn't support scanning : Operation not supported

eth0      Interface doesn't support scanning : Operation not supported

sit0      Interface doesn't support scanning : Invalid argument

wlan0     Scan completed :
          Cell 01 - Address: XX:XX:XX:XX:XX:XX
                    Mode:Managed
                    Quality:15/92  Signal level:-20 dBm  Noise level:-39 dBm

Where that XXed out MAC is the mac of the PCMCIA.  Furthermore dmsg
spits out:
wlan0: XX:XX:XX:XX:XX:XX auth_cb - frame was not ACKed
wlan0: XX:XX:XX:XX:XX:XX auth_cb - STA authenticated
wlan0: XX:XX:XX:XX:XX:XX assoc_cb - STA associated
when I stick the card in the thinkpad and it successfully 'connects'.
Again the XXs are the right MAC.

This to me looks as if things are working good through the two
interfaces... but I can't route packets?  What little simple things am I
missing (it's got to be something simple right?)

> route
192.168.2.0     *               255.255.255.0   U     0      0        0 wlan0
192.168.0.0     *               255.255.255.0   U     0      0        0 eth0
192.168.0.0     *               255.255.255.0   U     0      0        0 eth0
166.82.148.0    *               255.255.254.0   U     0      0        0 eth0
loopback        *               255.0.0.0       U     0      0        0 lo
default         XXXXXXXXXXXXXXX 0.0.0.0         UG    0      0        0 eth0

- -- 
     Drew Dowling               Drewhead          http://www.drewhead.org
 drewhead at drewhead.org    |                    |    WWW      / \ Alpha Phi Omega
Concord, North Carolina   |                    |  Nimat     /   \  Gamma Lambda
CLEMSON UNIVERSITY ALUMNI |                    | Apatschin /_____\
      TIGER BAND!         |      VGAP4 Hosting at http://vgap.drewhead.org
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