1

I'm trying to setup my pi as wlan repeater for my existing wlan. I'm using two usb wlan dongles to succeed.

$ lsusb
Bus 001 Device 006: ID 0cf3:1002 Atheros Communications, Inc. TP-Link TL-WN821N v2 802.11n [Atheros AR9170]
Bus 001 Device 007: ID 0846:9001 NetGear, Inc. WN111(v2) RangeMax Next Wireless [Atheros AR9170+AR9101]

$ iw list
Wiphy phy1
    Band 1:
        Capabilities: 0x184e
            HT20/HT40
            SM Power Save disabled
            RX HT40 SGI
            No RX STBC
            Max AMSDU length: 7935 bytes
            DSSS/CCK HT40
        Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
        Minimum RX AMPDU time spacing: 8 usec (0x06)
        HT TX/RX MCS rate indexes supported: 0-15, 32
        Frequencies:
            * 2412 MHz [1] (30.0 dBm)
            * 2417 MHz [2] (30.0 dBm)
            * 2422 MHz [3] (30.0 dBm)
            * 2427 MHz [4] (30.0 dBm)
            * 2432 MHz [5] (30.0 dBm)
            * 2437 MHz [6] (30.0 dBm)
            * 2442 MHz [7] (30.0 dBm)
            * 2447 MHz [8] (30.0 dBm)
            * 2452 MHz [9] (30.0 dBm)
            * 2457 MHz [10] (30.0 dBm)
            * 2462 MHz [11] (30.0 dBm)
            * 2467 MHz [12] (disabled)
            * 2472 MHz [13] (disabled)
            * 2484 MHz [14] (disabled)
        Bitrates (non-HT):
            * 1.0 Mbps
            * 2.0 Mbps (short preamble supported)
            * 5.5 Mbps (short preamble supported)
            * 11.0 Mbps (short preamble supported)
            * 6.0 Mbps
            * 9.0 Mbps
            * 12.0 Mbps
            * 18.0 Mbps
            * 24.0 Mbps
            * 36.0 Mbps
            * 48.0 Mbps
            * 54.0 Mbps
    max # scan SSIDs: 4
    max scan IEs length: 2257 bytes
    Coverage class: 0 (up to 0m)
    Supported Ciphers:
        * WEP40 (00-0f-ac:1)
        * WEP104 (00-0f-ac:5)
        * TKIP (00-0f-ac:2)
        * CCMP (00-0f-ac:4)
        * CMAC (00-0f-ac:6)
    Available Antennas: TX 0 RX 0
    Supported interface modes:
         * IBSS
         * managed
         * AP
         * AP/VLAN
         * monitor
         * mesh point
         * P2P-client
         * P2P-GO
    software interface modes (can always be added):
         * AP/VLAN
         * monitor
    valid interface combinations:
         * #{ managed, AP, mesh point, P2P-client, P2P-GO } <= 2,
           total <= 2, #channels <= 1
    Supported commands:
         * new_interface
         * set_interface
         * new_key
         * new_beacon
         * new_station
         * new_mpath
         * set_mesh_params
         * set_bss
         * authenticate
         * associate
         * deauthenticate
         * disassociate
         * join_ibss
         * join_mesh
         * remain_on_channel
         * set_tx_bitrate_mask
         * action
         * frame_wait_cancel
         * set_wiphy_netns
         * set_channel
         * set_wds_peer
         * Unknown command (82)
         * Unknown command (81)
         * Unknown command (84)
         * Unknown command (87)
         * Unknown command (85)
         * Unknown command (89)
         * Unknown command (92)
         * connect
         * disconnect
    Supported TX frame types:
         * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * Unknown mode (10): 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
    Supported RX frame types:
         * IBSS: 0x40 0xb0 0xc0 0xd0
         * managed: 0x40 0xd0
         * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
         * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
         * mesh point: 0xb0 0xc0 0xd0
         * P2P-client: 0x40 0xd0
         * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
         * Unknown mode (10): 0x40 0xd0
    Device supports RSN-IBSS.
    HT Capability overrides:
         * MCS: ff ff ff ff ff ff ff ff ff ff
         * maximum A-MSDU length
         * supported channel width
         * short GI for 40 MHz
         * max A-MPDU length exponent
         * min MPDU start spacing
    Device supports TX status socket option.
    Device supports HT-IBSS.
Wiphy phy0
    Band 1:
        Capabilities: 0x184e
            HT20/HT40
            SM Power Save disabled
            RX HT40 SGI
            No RX STBC
            Max AMSDU length: 7935 bytes
            DSSS/CCK HT40
        Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
        Minimum RX AMPDU time spacing: 8 usec (0x06)
        HT TX/RX MCS rate indexes supported: 0-15, 32
        Frequencies:
            * 2412 MHz [1] (30.0 dBm)
            * 2417 MHz [2] (30.0 dBm)
            * 2422 MHz [3] (30.0 dBm)
            * 2427 MHz [4] (30.0 dBm)
            * 2432 MHz [5] (30.0 dBm)
            * 2437 MHz [6] (30.0 dBm)
            * 2442 MHz [7] (30.0 dBm)
            * 2447 MHz [8] (30.0 dBm)
            * 2452 MHz [9] (30.0 dBm)
            * 2457 MHz [10] (30.0 dBm)
            * 2462 MHz [11] (30.0 dBm)
            * 2467 MHz [12] (disabled)
            * 2472 MHz [13] (disabled)
            * 2484 MHz [14] (disabled)
        Bitrates (non-HT):
            * 1.0 Mbps
            * 2.0 Mbps (short preamble supported)
            * 5.5 Mbps (short preamble supported)
            * 11.0 Mbps (short preamble supported)
            * 6.0 Mbps
            * 9.0 Mbps
            * 12.0 Mbps
            * 18.0 Mbps
            * 24.0 Mbps
            * 36.0 Mbps
            * 48.0 Mbps
            * 54.0 Mbps
    max # scan SSIDs: 4
    max scan IEs length: 2257 bytes
    Coverage class: 0 (up to 0m)
    Supported Ciphers:
        * WEP40 (00-0f-ac:1)
        * WEP104 (00-0f-ac:5)
        * TKIP (00-0f-ac:2)
        * CCMP (00-0f-ac:4)
        * CMAC (00-0f-ac:6)
    Available Antennas: TX 0 RX 0
    Supported interface modes:
         * IBSS
         * managed
         * AP
         * AP/VLAN
         * monitor
         * mesh point
         * P2P-client
         * P2P-GO
    software interface modes (can always be added):
         * AP/VLAN
         * monitor
    valid interface combinations:
         * #{ managed, AP, mesh point, P2P-client, P2P-GO } <= 2,
           total <= 2, #channels <= 1
    Supported commands:
         * new_interface
         * set_interface
         * new_key
         * new_beacon
         * new_station
         * new_mpath
         * set_mesh_params
         * set_bss
         * authenticate
         * associate
         * deauthenticate
         * disassociate
         * join_ibss
         * join_mesh
         * remain_on_channel
         * set_tx_bitrate_mask
         * action
         * frame_wait_cancel
         * set_wiphy_netns
         * set_channel
         * set_wds_peer
         * Unknown command (82)
         * Unknown command (81)
         * Unknown command (84)
         * Unknown command (87)
         * Unknown command (85)
         * Unknown command (89)
         * Unknown command (92)
         * connect
         * disconnect
    Supported TX frame types:
         * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
         * Unknown mode (10): 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
    Supported RX frame types:
         * IBSS: 0x40 0xb0 0xc0 0xd0
         * managed: 0x40 0xd0
         * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
         * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
         * mesh point: 0xb0 0xc0 0xd0
         * P2P-client: 0x40 0xd0
         * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
         * Unknown mode (10): 0x40 0xd0
    Device supports RSN-IBSS.
    HT Capability overrides:
         * MCS: ff ff ff ff ff ff ff ff ff ff
         * maximum A-MSDU length
         * supported channel width
         * short GI for 40 MHz
         * max A-MPDU length exponent
         * min MPDU start spacing
    Device supports TX status socket option.
    Device supports HT-IBSS.

    $ cat /etc/network/interfaces
auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wan
iface wan inet dhcp
wpa-driver wext
wpa-ssid "WLAN-SSID"
wpa-psk "PASSWORD"

iface lan inet static
address 192.168.234.1
netmask 255.255.255.0 

$ cat /etc/hostapd/hostapd.conf
interface=lan
driver=nl80211
ssid=WLAN-REPEATER-AP
hw_mode=g
channel=11
wpa=1
wpa_passphrase=REPEATER-PASSWORD
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP CCMP
wpa_ptk_rekey=600 

$ cat /etc/dnsmaq.conf
interface=lan
#bind-interfaces
dhcp-range=192.168.234.100,192.168.234.150,12h
#dhcp-option=3,192.168.234.1 

Here are some of the steps I performed, which are taken from this german tutorial http://blog.florianheinle.de/post/81479196987/wlan-repeater-mit-linux-selber-bauen

$ apt-get install ifrename wpasupplicant dnsmasq iptables hostapd
$ sudo nano /etc/iftab
wan mac 00:26:f2:95:5f:51
lan mac 94:0c:6d:e2:1c:d0
$ sudo nano /etc/network/if-up.d/dnsmasq 
#!/bin/bash
if [ "$IFACE" = "lan" ]; then
    /etc/init.d/dnsmasq restart
fi
$ sudo chown root:root /etc/network/if-up.d/dnsmasq
$ sudo chmod 755 /etc/network/if-up.d/dnsmasq
$ sudo nano /etc/network/if-up.d/router.sh
#!/bin/bash
iptables --table nat --append POSTROUTING --out-interface wan -j MASQUERADE
iptables --append FORWARD --in-interface lan -j ACCEPT
$ sudo nano /etc/sysctl.conf 
net.ipv4.ip_forward=1
$ sudo reboot

Stoping hostapd and testing it with the conf gives the following output

$ /etc/init.d/hostapd stop
[ ok ] Stopping advanced IEEE 802.11 management: hostapd.
$ sudo hostapd -dd /etc/hostapd/hostapd.conf
random: Trying to read entropy from /dev/random
Configuration file: /etc/hostapd/hostapd.conf
nl80211: interface lan in phy phy0
rfkill: initial event: idx=0 type=1 op=0 soft=0 hard=0
rfkill: initial event: idx=1 type=1 op=0 soft=0 hard=0
nl80211: Using driver-based off-channel TX
nl80211: Use separate P2P group interface (driver advertised support)
nl80211: TDLS supported
nl80211: TDLS external setup
nl80211: Register frame command failed (type=208): ret=-114 (Operation already in progress)
nl80211: Register frame match - hexdump(len=2): 04 0a
nl80211: Failed to register Action frame processing - ignore for now
nl80211: Add own interface ifindex 3
nl80211: Set mode ifindex 3 iftype 3 (AP)
nl80211: Create interface iftype 6 (MONITOR)
Failed to create interface mon.lan: -23 (Too many open files in system)
Try to remove and re-create mon.lan
nl80211: Remove interface ifindex=6
nl80211: Create interface iftype 6 (MONITOR)
nl80211: New interface mon.lan created: ifindex=7
nl80211: Add own interface ifindex 7
BSS count 1, BSSID mask 00:00:00:00:00:00 (0 bits)
nl80211: Regulatory information - country=US
nl80211: 2402-2472 @ 40 MHz
nl80211: 5170-5250 @ 80 MHz
nl80211: 5250-5330 @ 80 MHz
nl80211: 5735-5835 @ 80 MHz
nl80211: 57240-63720 @ 2160 MHz
nl80211: Added 802.11b mode based on 802.11g information
Allowed channel: mode=1 chan=1 freq=2412 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=2 freq=2417 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=3 freq=2422 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=4 freq=2427 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=5 freq=2432 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=6 freq=2437 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=7 freq=2442 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=8 freq=2447 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=9 freq=2452 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=10 freq=2457 MHz max_tx_power=30 dBm
Allowed channel: mode=1 chan=11 freq=2462 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=1 freq=2412 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=2 freq=2417 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=3 freq=2422 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=4 freq=2427 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=5 freq=2432 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=6 freq=2437 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=7 freq=2442 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=8 freq=2447 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=9 freq=2452 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=10 freq=2457 MHz max_tx_power=30 dBm
Allowed channel: mode=0 chan=11 freq=2462 MHz max_tx_power=30 dBm
Completing interface initialization
Mode: IEEE 802.11g  Channel: 11  Frequency: 2462 MHz
nl80211: Set freq 2462 (ht_enabled=0 sec_channel_offset=0)
Failed to update rate sets in kernel module
RATE[0] rate=10 flags=0x1
RATE[1] rate=20 flags=0x1
RATE[2] rate=55 flags=0x1
RATE[3] rate=110 flags=0x1
RATE[4] rate=60 flags=0x0
RATE[5] rate=90 flags=0x0
RATE[6] rate=120 flags=0x0
RATE[7] rate=180 flags=0x0
RATE[8] rate=240 flags=0x0
RATE[9] rate=360 flags=0x0
RATE[10] rate=480 flags=0x0
RATE[11] rate=540 flags=0x0
Flushing old station entries
Deauthenticate all stations
wpa_driver_nl80211_set_key: ifindex=3 alg=0 addr=(nil) key_idx=0 set_tx=0 seq_len=0 key_len=0
wpa_driver_nl80211_set_key: ifindex=3 alg=0 addr=(nil) key_idx=1 set_tx=0 seq_len=0 key_len=0
wpa_driver_nl80211_set_key: ifindex=3 alg=0 addr=(nil) key_idx=2 set_tx=0 seq_len=0 key_len=0
wpa_driver_nl80211_set_key: ifindex=3 alg=0 addr=(nil) key_idx=3 set_tx=0 seq_len=0 key_len=0
Using interface lan with hwaddr 94:0c:6d:e2:1c:d0 and ssid 'Kitchen-WLAN'
Deriving WPA PSK based on passphrase
SSID - hexdump_ascii(len=12):
     4b 69 74 63 68 65 6e 2d 57 4c 41 4e               Kitchen-WLAN    
PSK (ASCII passphrase) - hexdump_ascii(len=13): [REMOVED]
PSK (from passphrase) - hexdump(len=32): [REMOVED]
random: Got 20/20 bytes from /dev/random
Get randomness: len=32 entropy=0
GMK - hexdump(len=32): [REMOVED]
Get randomness: len=32 entropy=0
Key Counter - hexdump(len=32): [REMOVED]
WPA: Delay group state machine start until Beacon frames have been configured
VLAN: vlan_set_name_type(name_type=2)
nl80211: Set beacon (beacon_set=0)
WPA: Start group state machine to set initial keys
WPA: group state machine entering state GTK_INIT (VLAN-ID 0)
Get randomness: len=16 entropy=0
GTK - hexdump(len=32): [REMOVED]
WPA: group state machine entering state SETKEYSDONE (VLAN-ID 0)
wpa_driver_nl80211_set_key: ifindex=3 alg=2 addr=0x88f0c key_idx=1 set_tx=1 seq_len=0 key_len=32
   broadcast key
wpa_driver_nl80211_set_operstate: operstate 0->1 (UP)
netlink: Operstate: linkmode=-1, operstate=6
lan: Setup of interface done.
RTM_NEWLINK: operstate=1 ifi_flags=0x1002 ()
nl80211: Ignore interface down event since interface lan is up
nl80211: Ignore event for foreign ifindex 6
nl80211: Ignore dellink event for foreign ifindex 6
RTM_NEWLINK: operstate=1 ifi_flags=0x1002 ()
nl80211: Ignore interface down event since interface mon.lan is up
RTM_NEWLINK: operstate=1 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'mon.lan' added
Unknown event 5
RTM_NEWLINK: operstate=1 ifi_flags=0x1003 ([UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'lan' added
nl80211: if_removed already cleared - ignore event
RTM_NEWLINK: operstate=1 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])
RTM_NEWLINK, IFLA_IFNAME: Interface 'lan' added
nl80211: if_removed already cleared - ignore event
nl80211: Event message available
nl80211: Delete station 74:e2:f5:27:22:59
mgmt::deauth cb
VLAN: vlan_newlink(lan)
Add randomness: count=1 entropy=0
Add randomness: count=2 entropy=1
Add randomness: count=3 entropy=2
Add randomness: count=4 entropy=3
...
nl80211: Event message available
nl80211: Ignored event (cmd=64) for foreign interface (ifindex 4)
Add randomness: count=163 entropy=162
Add randomness: count=164 entropy=163
... 

The WLAN is accessible but devices connecting to it are getting no ip-address. I assume there must be something wrong with my dnsmaq.conf.

Any suggestions?

1

I haven't done this exact configuration, but in order for an associated station to get an IP address it's going to have to have visibility to a DHCP server. Since you're doing wlan repeating, it would seem to me you're going to need to a bridge statement in your hostapd config file to bridge your AP mode wlan to your station mode wlan. I don't have details on that, but unless you're bridged to a network with a DHCP server, you're not getting an address.

| improve this answer | |
  • No answer at all. Just a generic and quite obvious: No dhcp. Missing multicast? Please check and confirm your facts before posting. – fcm Jan 9 '16 at 20:17
-1

Someone in the blog commentaries of the original tutorial pointed out that there was a missing 'S' in the file naming of "dnsmaq.conf".

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.