Initial connection problems

[Thomas Schaaf]

I am new to this mailing list so first and for most I wanted to thank
you all for providing such a great tool.

I am using hostapd to create an unencrypted wireless network (because
iwconfig wlan0 mode master does not work). On this machine I also have
an FTP Server running. For my camera I have the Canon WFT-E5 Adapter
[1] which provides the camera with the possibility to connect to a
provided WIFI Network and send images via FTP.
The setup works occasionally.
The first time I connect to the network I get an IP from the DHCP
Server (as seen in syslog & camera config) but I am unable to ping the
camera and it is unable to send me images. Sadly there are no log
files provided by canon except the error message "Cannot connect to
FTP".
If I turn the camera off and on again it usually works (if the time
frame is not to far apart). And I am able to turn off the camera as
often as I want and pings from the server and images from the camera
go through.

Thus I have recorded the network traffic using tshark, hostapd output
and syslog: First connect after reboot of computer and camera
[2][3][4], Here I connect after having restarted hostapd. And then try
to turn the camera off and on until I get a connection on the ftp
server. [5][6][7], after restarting hostapd again the camera won't
connect again. [8][9][10]. My hostapd.conf [11], network settings [12]
is extremly simple.
Here is the longest log which captures me starting hostapd, restarting
the camera until it successfully connects and then restarting it a
couple more times. Turning off the camera and turning it back on after
a minute has passed. [13][14][15]

My setup in detail:
Debian Wheezy. I have also tried Debian Squeeze with the same results.
hostapd: 1.0.2
dhcp: isc-dhcp-server 4.2.2.dfsg.1-5
dns: bind9 9.8.1.dfsg.P1-4.2 ( I have tried dnsmasq aswell )
ip: 10.10.0.1 server, 10.10.0.3 camera, netmask 255.255.255.0,
broadcast 10.10.0.255
iptables-save: is empty -> ALL ACCEPT
ipv6 is turned off through sysctrl.conf
wifi device: Asus PCE-N15 PC
wifi driver used: rtl8192ce

Canon 7D: Tried firmware 1.2 aswell as 2.0
Canon WFT-E5: 1.05 aswell as 1.07

To eliminate the DHCP Server and DNS Server are of no fault I have
first tried using dnsmasq aswell as setting the camera to manual IP
and tried the same procedure.

Sadly I am not able to reproduce the problem on any provided system.
Another machine using Debian can connect without any troubles and
connect to ftp the first time. I have tried the WFT Adapter in other
networks and it worked without a problem.

As stated before after the connection has been made once I am able to
turn off the camera as often as I want and the connection works
flawlessly. If I restart the hostapd service though the same error
occures.
Does anyone know what this problem could be linked to? Is there a solution?

I hope I have not "overprovided" information but would be happy to
provide any additional information needed.

Thank you very much for your time!
Thomas

[1]: Wireless File Transfer Adapter WFT-E5:
http://cpn.canon-europe.com/content/product/accessories/wft_e5.do
[2]: Wireshark Fresh: https://dl.dropbox.com/u/5910/hostapd/tsharkfresh
[3]: Hostapd Log Fresh: https://dl.dropbox.com/u/5910/hostapd/hostapdfresh
[4]: Syslog Fresh: http://pastie.org/private/w3ynbqejczlzy3jmzpkocg
[5]: Wireshark Camera reboot: https://dl.dropbox.com/u/5910/hostapd/tsharkreboot
[6]: Hostapd Log Camera
reboot:https://dl.dropbox.com/u/5910/hostapd/hostapdreboot
[7]: Syslog Camera reboot: http://pastie.org/private/lsrqc7fw0madrjt0cs9p4a
[8]: Wireshark restart
hostapd.https://dl.dropbox.com/u/5910/hostapd/tsharkrestart
[9]: Hostapd Log restart hostapd.
https://dl.dropbox.com/u/5910/hostapd/hostapdrestart
[10]: Syslog restart hostapd. http://pastie.org/private/af9psccobxcqcb6rn4nu7g
[11]: hostapd.conf: http://pastie.org/4644603
[12]: Network settings: http://pastie.org/4644655
[13]: Wireshark COMPLETE: https://dl.dropbox.com/u/5910/hostapd/tsharkcomplete
[14]: Hostapd Log COMPLETE:
https://dl.dropbox.com/u/5910/hostapd/hostapdcomplete
[15]: SysLog COMPLETE:http://pastie.org/private/gymllbodh4k7bppxcponca


--
Thomas Schaaf

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