problem with iPhone and Samsung mobiles

Wed Feb 18 05:32:07 PST 2009

Hello,

I have the same issue with madwifi and a samsung player addict phone.
I can provide some hostapd traces too if needed.

Adam

Tamas Selmeci a ?crit :
> Hello all!
>
> I'm new to this list but not new to hostapd. This AP program has been 
> used by me several months for creating our very own AP on an Intel 
> XScale-based platform. And it works usually perfectly. As we use Atheros 
> wifi cards, the previous wifi driver was madwifi, but since then we've 
> switched to Atheros n cards, so ath9k is being used.
>
> 90% of the devices tested with hostapd works perfectly: they are capable 
> of connecting to the AP, they get an IP (udhcpd) and are able to 
> communicate. One of the functions of the device I'm developing is to act 
> as a hotspot; these mentioned devices can surf the net though the hotspot.
>
> But there are problems: two mobile phones fail to surf the net. These 
> phones are Samsung i780 and Apple iPhone.
>
> The situation in detail: they connect to the AP, authentication and 
> association succeed, they get an IP address from the DHCP server. Problems:
> - when they get pinged from another host on the AP, or even from the 
> computer running hostapd, only the very first ping has a reply (but not 
> necessarily, sometime this fails too), further pings fail;
> - telnet, ping and other tools were installed on the Samsung (Windows 
> Mobile 6), and the pings initiated from that into the direction of 
> either AP or an other client are successful only in 50-60 percent, 
> otherwise they timeout. The typical time is between 25-400 ms and varies 
> heavily;
> - the situation is the same in case of an open network and in case of 
> WPA/WPA2;
>
> All the hostapd logging facilities are on (I'm watching the syslog). 
> Have been tried with compat-ath9k-20090125 and compat-ath9k-20090211, 
> nothing changed. Similarly, Atheros 5416 and 9160 behaved the same.
>
> It must be noted that with madwifi and hostapd the Samsung and iPhone 
> could work perfectly, but we had to switch to ath9k.
>
> hostapd dump contains something interesting, that may be the key to the 
> problem. After the first ping to the Samsung/iPod, the status changes to 
> something like this:
>
> Before ping:
> ----------------------------------------------------
> hostapd state dump - Wed Jun 25 13:33:05 2008
> num_sta=1 num_sta_non_erp=0 num_sta_no_short_slot_time=0
> num_sta_no_short_preamble=1
>
> STA=00:21:e9:11:a3:2d
>    AID=1 flags=0x23 [AUTH][ASSOC][AUTHORIZED]
>    capability=0x411 listen_interval=10
>    supported_rates=02 04 0b 16 0c 12 18 24 30 48 60 6c
>    timeout_next=NULLFUNC POLL
>
>
> ping command (ping -c 3 192.168.10.200  <-- this is the iPhone now)
> ----------------------------------------------------
> ping -c 3 192.168.10.200
> PING 192.168.10.200 (192.168.10.200): 56 data bytes
>
> --- 192.168.10.200 ping statistics ---
> 3 packets transmitted, 0 packets received, 100% packet loss
>
>
> After the ping (a Windows host was connected and the ping happened from 
> there):
> ----------------------------------------------------
> hostapd state dump - Wed Jun 25 13:38:00 2008
> num_sta=2 num_sta_non_erp=0 num_sta_no_short_slot_time=0
> num_sta_no_short_preamble=2
>
> STA=00:80:5a:36:9d:6b
>    AID=2 flags=0x23 [AUTH][ASSOC][AUTHORIZED]
>    capability=0x411 listen_interval=3
>    supported_rates=82 84 8b 96 0c 12 18 24 30 48 60 6c
>    timeout_next=NULLFUNC POLL
>
> STA=00:21:e9:11:a3:2d
>    AID=1 flags=0x63 [AUTH][ASSOC][AUTHORIZED][PENDING_POLL
>    capability=0x411 listen_interval=10
>    supported_rates=02 04 0b 16 0c 12 18 24 30 48 60 6c
>    timeout_next=NULLFUNC POLL
>
>
> This "[PENDING_POLL" doesn't seem to be totally OK to me...
>
>
> hostapd.conf:
> ----------------------------------------------------
> interface=wlan0
> driver=nl80211
> ieee80211n=1
> hw_mode=g
> country_code=DE
> max_num_sta=32
> # supported_rates=10 20 55 110 60 90 120 180 240 360 480 540
> # ht_capab=[HT40-][SHORT-GI-20][SHORT-GI-40]
> logger_syslog=1
> logger_syslog_level=0
> logger_stdout=-1
> logger_stdout_level=0
> debug=1
> ctrl_interface_group=0
> macaddr_acl=0
> auth_algs=1
> dump_file=/tmp/hostapd.dump
> ctrl_interface=/var/run/hostapd
> ssid=norbolataska
> wpa=3
> wpa_key_mgmt=WPA-PSK
> wpa_pairwise=CCMP
> rsn_pairwise=CCMP
> ap_max_inactivity=15
> wpa_psk=af8f7d04a3331126ee9fad0cf2dbba54728389d93d83ca1549dfda2727249890
> channel=13
>
>
> Both hostapd-0.6.7 and 0.6.8 produce the symptoms described above.
>
> Do you have any idea what could be wrong? Why is there problems with 
> iPhone and Samsung i780? I was unable to figure out. Both phone receive 
> the correct DNS, gateway and IP data. If my DNS server or DHCP server 
> would be wrong then how could other devices work seamlessly?
>
> Any idea/information is appreciated...
>
> Thank you very much!
>
> Best regards,
>
> (I can send my hostapd compile-time configuration on request)
>   