Thanks for your reply Venkat

On the AP
iwconfig gives
ath1      IEEE 802.11g  ESSID:"Aditya" 
          Mode:Master  Frequency:2.447 GHz  Access Point: 00:0B:6B:20:40:DD  
          Bit Rate:0 kb/s   Tx-Power:16 dBm   Sensitivity=1/1 
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=48/70  Signal level=-47 dBm  Noise level=-95 dBm
          Rx invalid nwid:78  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

route -n gives
ayb@AdLenovoLinux:~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 ath1
192.168.0.0     0.0.0.0         255.255.255.0   U     2      0        0 wlan0
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 wlan0

wlan0 is the name of my inbuilt Intel wireless card. Im using a PCMCIA Atheros card named ath1

On the STA
iwconfig gives
ath1      IEEE 802.11g  ESSID:"Aditya"
          Mode:Managed  Frequency:2.447 GHz  Access Point: 00:0B:6B:20:40:DD
          Bit Rate:54 Mb/s   Tx-Power:20 dBm   Sensitivity=1/1
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=39/70  Signal level=-54 dBm  Noise level=-93 dBm
          Rx invalid nwid:1464  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

and route -n gives

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     0.0.0.0         255.255.255.0   U     2      0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 ath1
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 wlan0

Thanks
regards,
Aditya Bhave




On 05/21/2010 07:24 AM, Venkat Ch wrote:
Can you please send the output of "iwconfig" and "route -n" at both STA and AP.


Thanks & Regards
Venkata Rao chimata

On Fri, May 21, 2010 at 2:39 AM, Aditya Bhave <ayb@andrew.cmu.edu> wrote:
Hi,

Im trying to configure MadWifi as an AP on laptop A and connecting a
client from laptop B. Although the station B associates correctly, Im
unable to even do a simple ping to the AP

Here is my configuration

Laptop A: Lenovo Thinkpad
Card: lshw -C network
       description: interface
       product: Atheros AR5001X+ Wireless Network Adapter
       vendor: Atheros Communications Inc.
       physical id: 0
       bus info: pci@0000:16:00.0
       logical name: wifi0
       version: 01
       serial: 00:0b:6b:20:40:dd
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master cap_list logical
       configuration: broadcast=yes driver=ath_pci latency=96
maxlatency=28 mingnt=10 multicast=yes
       resources: irq:16 memory:c4000000-c400ffff

Here is the script I used to create an AP
/*********
#!/bin/sh

sudo modprobe -r ath5k || true
sudo modprobe -r ath9k || true
sudo modprobe -r ath_pci || true
sudo modprobe ath_pci autocreate=none

sudo wlanconfig ath1 destroy || true
sudo wlanconfig ath1 create wlandev wifi0 wlanmode ap    # set up the AP
sudo iwpriv ath1 mode 3                    # 11g mode
sudo iwconfig ath1 essid "Aditya"      # essid
sudo iwconfig ath1 key off                # no wep
sudo iwconfig ath1 enc off                # no wep
sudo iwpriv ath1 wpa 0                    # no wpa

sudo ifconfig ath1 up
sleep 1
sudo ifconfig ath1 192.168.1.1 netmask 255.255.255.0

sudo sysctl -w dev.wifi0.diversity=0
sudo sysctl -w dev.wifi0.txantenna=1
sudo sysctl -w dev.wifi0.rxantenna=
************************/

Laptop B: Dell Inspiron
Card: description: Wireless interface
      product: AR928X Wireless Network Adapter (PCI-Express)
      vendor: Atheros Communications Inc.
      physical id: 0
      bus info: pci@0000:0c:00.0
      logical name: wifi0
      version: 01
      serial: 00:15:6d:84:35:8e
      width: 64 bits
      clock: 33MHz
      capabilities: bus_master cap_list logical ethernet physical wireless
      configuration: broadcast=yes driver=ath_pci latency=0
multicast=yes wireless=IEEE 802.11g
      resources: irq:19 memory:dfcf0000-dfcfffff

Here is the script I used to create a STA
/*************
#!/bin/sh

sudo modprobe -r ath5k || true
sudo modprobe -r ath9k || true
sudo modprobe -r ath_pci || true

sudo modprobe ath_pci autocreate=none
sudo wlanconfig ath1 destroy || true
sudo wlanconfig ath1 create wlandev wifi0 wlanmode sta
sudo iwpriv ath1 mode 3     # 11g
sudo iwconfig ath1 essid "Aditya"
sleep 1

sudo sysctl -w dev.wifi0.diversity=0
sudo sysctl -w dev.wifi0.txantenna=1
sudo sysctl -w dev.wifi0.rxantenna=1

***********************/

In NetworkManager, I configured so that address is obtained through DHCP
whenever the STA connects to AP "Aditya"
Here is my dhcpd.conf file
/***************
option domain-name-servers 192.168.1.1;

default-lease-time 86400;
max-lease-time 604800;

authoritative;

# basic setup by ADITYA BHAVE
subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.10 192.168.1.20;
    option subnet-mask 255.255.255.0;
    option broadcast-address 192.168.1.255;
    option routers 192.168.1.1;
}
/*****************************/

Firstly, the STA is unable to obtain an address through DHCP.
I then manually gave the STA an address of 192.168.1.10, with a netmask
of 255.255.255.0 and a gateway of 192.168.1.1. I even ran the following
command
route add default gw 192.168.1.1

Inspite of both the above changes, a ping command fails
ayb@AD-DELL:~$ ping -I ath1 192.168.1.1
PING 192.168.1.1 (192.168.1.1) from 192.168.1.2 ath1: 56(84) bytes of data.
 From 192.168.1.2 icmp_seq=1 Destination Host Unreachable
 From 192.168.1.2 icmp_seq=3 Destination Host Unreachable
 From 192.168.1.2 icmp_seq=4 Destination Host Unreachable
 From 192.168.1.2 icmp_seq=5 Destination Host Unreachable
 From 192.168.1.2 icmp_seq=6 Destination Host Unreachable

Can someone please help to diagnose this problem?

Thanks
regards,
Aditya Bhave



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