wireless card cannot obtain IP address from DHCP server

kswitch · 10-31-2005, 06:39 PM

slackware 10.1 linux 2.4.29
I cant seem to get an IP address for the at0 interface from the DHCP server on my router. IM running MADWIFI on a D-Link DWL-G510.
i have tried:

Code:

dhcpcd ath0

still everything i do seems hopeless. if anyone is out there who has a helpful hint please reply. much appreciated.
thank you.

Brian1 · 10-31-2005, 06:54 PM

I do not know what slackware very well but post your /etc/rc.d/rc.inet1.conf. The command you are using is incorrect. That is to activate a dhcp server daemon on the linux machine. Use ' ifconfig ath0 up '. This would work if the settings in /etc/rc.d/rc.inet1.conf are set to dhcp. Only thing I do not know is how ath0 is defined in slackware. I am sure there is info here about the subject. Try the search feature for more help.

Also you make sure there is no wep, wpa, mac or IP filtering turned-on on the router to eliminate those issues for now. If using those security features enabled them after setting linux machine has them enabled.

Hope this helps
Brian1

kswitch · 11-01-2005, 09:34 AM

ok here it is. hope this helps

Code:

# /etc/rc.d/rc.inet1.conf
#
# This file contains the configuration settings for network interfaces.
# If USE_DHCP[interface] is set to "yes", this overrides any other settings.
# If you don't have an interface, leave the settings null ("").

# Config information for ath0 (using dhcp):
IFNAME[1]="ath0"
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]="yes"
DHCP_HOSTNAME[1]="linksys"

# Config information for eth0:
IPADDR[0]=""
NETMASK[0]=""
USE_DHCP[0]="yes"
DHCP_HOSTNAME[0]=""

# Config information for eth1:
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]=""
DHCP_HOSTNAME[1]=""

# Config information for eth2:
IPADDR[2]=""
NETMASK[2]=""
USE_DHCP[2]=""
DHCP_HOSTNAME[2]=""

# Config information for eth3:
IPADDR[3]=""
NETMASK[3]=""
USE_DHCP[3]=""
DHCP_HOSTNAME[3]=""

# Default gateway IP address:
GATEWAY=""

# Change this to "yes" for debugging output to stdout.  Unfortunately,
# /sbin/hotplug seems to disable stdout so you'll only see debugging output
# when rc.inet1 is called directly.
DEBUG_ETH_UP="no"

Alien Bob · 11-01-2005, 09:51 AM

Quote:

Originally posted by kswitch
ok here it is. hope this helps

# Config information for ath0 (using dhcp):
IFNAME[1]="ath0"
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]="yes"
DHCP_HOSTNAME[1]="linksys"

.......

# Config information for eth1:
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]=""
DHCP_HOSTNAME[1]=""

.........

You see where this fails?The first set of lines are correct for configuring ath0 using DHCP to request an IP address.
But then comes the second set of lines with PARAMETERNAME[1]="...." and now USE_DHCP[1] gets re-defined to an empty value. The result is, that your ath0 will not be configured at all.

This would be enough already:

Code:

 
# /etc/rc.d/rc.inet1.conf
#
# This file contains the configuration settings for network interfaces.
# If USE_DHCP[interface] is set to "yes", this overrides any other settings.
# If you don't have an interface, leave the settings null ("").

# Config information for ath0 (using dhcp):
IFNAME[1]="ath0"
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]="yes"
DHCP_HOSTNAME[1]="linksys"

# Default gateway IP address:
GATEWAY=""

# Change this to "yes" for debugging output to stdout.  Unfortunately,
# /sbin/hotplug seems to disable stdout so you'll only see debugging output
# when rc.inet1 is called directly.
DEBUG_ETH_UP="no"

It is not required to have all the other parameters with [0] [2] and [3] etc... you can leave them in, or out if they are empty == unused. But never use any of them twice ...
Another remark: the use of the parameter IFNAME[1]="ath0" is only introduced in Slackware 10.2. For Slackware 10.1 you would first have to download newer rc.inet1 and rc.wireless scripts at http://www.slackware.com/~alien/rc_scripts/ for instance, I do not know if you did that.

Now, this part only covered the TCPIP part of setting up your interface. Are you sure that your wireless configuration is correct, too? Because the command

Code:

dhcpcd -d -t 30 ath0

should give you an IP address even if the configuration in the rc.inet1.conf file was completely wrong. The fact that you did not get an IP address would suggest that you need to do some more configuration, perhaps in rc.wireless.conf? Perhaps the ESSID and/or a WEP key?

Eric

kswitch · 11-01-2005, 02:30 PM

i made the appropriate changes. i still dont get an IP address from the dhcp server

Code:

# /etc/rc.d/rc.inet1.conf
#
# This file contains the configuration settings for network interfaces.
# If USE_DHCP[interface] is set to "yes", this overrides any other settings.
# If you don't have an interface, leave the settings null ("").

# Config information for ath0 (using dhcp):
IFNAME[1]="ath0"
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]="yes"
DHCP_HOSTNAME[1]="linksys"

# Default gateway IP address:
GATEWAY=""

# Change this to "yes" for debugging output to stdout.  Unfortunately,
# /sbin/hotplug seems to disable stdout so you'll only see debugging output
# when rc.inet1 is called directly.
DEBUG_ETH_UP="no"

Alien Bob · 11-01-2005, 02:57 PM

Time you post the output of the

Code:

iwconfig

Code:

ifconfig -a

and

Code:

cat /etc/rc.d/rc.wireless.conf | grep -v "^$" | grep -v "^[^\w]*#"

commands...

Eric

kswitch · 11-06-2005, 11:36 AM

Code:

 bash-3.00# iwconfig
lo               no wireless extensions

wifi0          no wireless extensions

ath0          IEEE 802.11g    ESSID:"msg"
                 Mode:Master    Frequency:2.412GHz        Access Point:  00:11:95:F9:51:12
                 Bit Rate:0kb/s      Tx-Power:18 dBm      Sensitivity=0/3
                 Retry:off     RTS thr:off          Fragment thr:off
                 Encryption key: off
                 Power Managment: off
                 Link Quality:0/94       Signal level:-95 dBm    Noise level:-9 dBm
                 Rx invalid nwid:9       Rx invalid crypt:0    Rx invalid frag:0
                 Tx excessive retries:0    Invalid misc:0     Missed beacon:0

bash-3.00# ifconfig -a
\ath0           Link encap:Ethernet   HWaddr  00:11:95:F9:51:12
                 UP BROADCAST MULTICAST    MTU:1500   Metric:1
                 RX packets:0  errors:0 dropped:0 overruns:0 frame:0
                 TX packets:3  errors:0 dropped:0 overruns:0 carrier:0
                 collisions:0
                 RX bytes:0 (0.0 b)    TX bytes 1770 (1.7kb)

lo              Link encap: Local Loopback
                 inet addr:127.0.0.1    Mask:255.0.0.0
                 UP LOOPBACK RUNNING   MTU:16436   Metric:1
                 RX packets:2  errors:0 dropped:0 overruns:0 frame:0
                 TX packets:2  errors:0 dropped:0 overruns:0 carrier:0
                 collisions:0
                 RX bytes:100 (100.0 b)   TX bytes:100 (100.0b)

wifi0         Link encap:Ethernet   HWaddr  00:11:95:F9:51:12
                UP BROADCAST MULTICAST    MTU:1500   Metric:1
                RX packets:57  errors:0 dropped:0 overruns:0 frame:30
                TX packets:48  errors:1 dropped:0 overruns:0 carrier:0
                collisions:0
                RX bytes:3183 (31.0 kb)   TX bytes:4655 (4.5 kb)

Code:

bash-3.00# cat /etc/rc.d/rc.wireless.conf |grep -v "^$" | grep -v "^[^\w]*#"|more
VERBOSE=1
case "$HWADDR" in
*)
       INFO="Any ESSID"
       ESSID="any"
       ;;
00:04:E2:*)
       INFO="SMC2835W  EZ Connect g 2.4GHz  54 Mbps  Wireless Cardbus Adapter"
      ESSID="any"
      NWID=""
      MODE="Managed"
      FREQ=""
      CHANNE="6"
      SENS=""
      RATE="auto"
      KEY=""
      RTS=""
      FRAG=""
      IWCONFIG=""
      IWSPY=""
      IWPRIV=""
      ;;
00:60:1D*100:02:2D:*)
      INFO="Wavelan IEEE example  (Lucent default settings)"
      ESSID="Wavelan Network"
      MODE="Managed"
      KEY="s:secu1"
      ;;
00:40:96:*100:02:8A:*)
      INFO="Cisco/Aironet example (Cisco default settings)"
      ESSID="any"
      MODE="Managed"
      KEY="off"
      ;;
00:00:F0:*100:02:78:*)
      INFO="Samsung MagicLan example (Samsung default settings)"
      ESSID="any"
      MODE="Managed"
      CHANNEL="4"
      RATE="auto
      ;;
00:00:8F:*100:00:F1:*)
     INFO="Raylink/Aviator2.4 example (Aviator default ad=hoc setting)"
     ESSID="ADHOC_ESSID"
     MODE="Ad-Hoc"
     RATE="auto"
     IWPRIV="set_framing 1"
     ;;
08:00:0E:*)
     INFO="Wavelan example (Lucent default settings)"
     NWID="0100"
     MODE="Ad-Hoc"
     FREQ="2.425G"
     KEY="off"
     ;;
00:80:C7:*)
     INFO="Netwave example (Netwave default settings)"
     NWID="100"
     KEY="00"
     ;;
XX:XX:XX:*)
     INFO="Proxim RangeLan2/Symphony example"
     NWID="0"
     MODE="Master"
     CHANNEL="15"
     IWPRIV="setsubchan 1"
     ;;
XX:XX:XX:*)
     INFO="NWN Swallow example"
     ESSID="session"
     KEY="0000-0000-00 open"
     ;;
XX:XX:XX:*)
     INFO="Symbol Spectrum24 example"
     ESSID="Essid string"
     ;;
*)
     INFO="Fill with your own settings..."
     ESSID=""
     NWID=""
     MODE=""
     FREQ=""
     CHANNEL=""
     SENS=""
     RATE=""
     KEY=""
     RTS=""
     FRAG=""
     IWCONFIG=""
     IWSPY=""
     IWPRIV=""
     ;;
esac
bash-3.00#