[Q] tun.ko and vpn for Dell Streak - Streak 5 Q&A, Help & Troubleshooting

I am trying to connect to my company's vpn server (Cisco) with an application named vpnc.
but it needs a tun.ko module which I can't find on the Dell Streak.
I find tun.ko for other devices but I can't use them as a module on the Dell Streak. It does not accept the exec format.
Can anyone compile a tun.ko for Dell Streak ? Or is there any compiled tun.ko for it ?
Thanks.

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I'd appreciate any help...

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I misunderstood the OP query

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As the OP said, tun.ko needs to be specific to the device.
The one you found says:
"tun for Android 2.2 (Froyo) Nexus One devices"
We are both looking for one for the Streak - in my case at 2.1 level.
Thanks for looking.
Post #12 Here http://forum.xda-developers.com/showthread.php?t=630703&page=2 appears to have all the instructions, but I don't have the skills.

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mardibloke said:
As the OP said, tun.ko needs to be specific to the device.
The one you found says:
"tun for Android 2.2 (Froyo) Nexus One devices"
We are both looking for one for the Streak - in my case at 2.1 level.
Thanks for looking.
Post #12 Here http://forum.xda-developers.com/showthread.php?t=630703&page=2 appears to have all the instructions, but I don't have the skills.
Click to expand...
Click to collapse
is there really that much difference between the streak and the nexus?
I misunderstood what the OP meant by "other devices" I Presumed he meant linux not android,
have you thought about asking on that google code page for them to compile it for you?
-----edit scratch that..
having read that thread..
I think you need the streak source code..
Best get involved in the attempts to get Dell to release it to comply with the GPL.

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actually, we don't need the source code of Streak.
we just need to compile tun.ko for Streak.
I don't know how to do that.
I asked in the project site but nobody answered.

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mrmrmrmr said:
actually, we don't need the source code of Streak.
we just need to compile tun.ko for Streak.
I don't know how to do that.
I asked in the project site but nobody answered.
Click to expand...
Click to collapse
according to the thread mardibloke posted you need the source as he checks out the nexus-one specific head..
Finaly! I figured out how to build tun.ko module for the stock kernel.
If anybody wants to repeat that:
* I have Android OpenSource installed in /opt/android
* In /opt/android I did: git clone git://android.git.kernel.org/kernel/msm.git kernel-nexus
* In kernel-nexus I did:
- git checkout -b origin/android-msm-2.6.29-nexusone
- git checkout HEAD^
(The last operation reverses one revision, I needed a previous revision from the tree. Different revisions generate modules with different vermagic values)
(Actually, instead of previous two this should work as well - it should checkout the correct revision: git checkout 4bc62c230b2942bea72c3b5258e3e4f1d6cb534b )
- make ARCH=arm CROSS_COMPILE=/opt/android/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin/arm-eabi- distclean
- adb pull /proc/config.gz
- gunzip config.gz
- mv config .config
- Edited .config: changed "# CONFIG_TUN is not set" to: "CONFIG_TUN=m"
- make ARCH=arm CROSS_COMPILE=/opt/android/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin/arm-eabi- modules
- The driver ends up in: drivers/net/tun.ko
- You can verify if it is going to match the kernel by running:
+ strings drivers/net/tun.ko | grep 2.6.29
+ It should produce "vermagic=2.6.29-01117-g4bc62c2 preempt mod_unload ARMv7"
+ The "2.6.29-01117-g4bc62c2" should be the same as the "Kernel version" in "Settings->About phone" on your phone.
* Now you can upload the module to your phone. I did:
- adb shell mount -o remount,rw /dev/block/mtdblock3 /system
- adb push drivers/net/tun.ko /system/lib/modules/
- adb shell mount -o remount,ro /dev/block/mtdblock3 /system
- And you can use adb shell, enter /system/lib/modules and run: insmod tun.ko
- It should work
Click to expand...
Click to collapse

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Made some progress, but now stuck getting the tun.ko file copied onto my streak.
Streak 2.1 does not appear to have cp or pull commands.
Cannot push the file over via adb, to where I need it
Cannot move the file
Any help really appreciated.
>adb push tun.ko /system/lib/modules/tun.ko
failed to copy 'tun.ko' to '/system/lib/modules/tun.ko': Permission denied
>adb push tun.ko /sdcard/tun.ko
877408 KB/s (158130 bytes in 0.000s)
>adb shell
$ su
su
# mount -o remount,rw /dev/block/mtdblock3 /system
mount -o remount,rw /dev/block/mtdblock3 /system
#
# mv /sdcard/tun.ko /system/lib/modules/tun.ko
mv /sdcard/tun.ko /system/lib/modules/tun.ko
failed on '/sdcard/tun.ko' - Cross-device link

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how did you get it compiled for the streak without the kernel source?

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Can we see if I get it working before I comment on that

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couldn't you just put in on your sd card and copy over to system/lib/modules once you mount it r/w with root explorer?

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I don't appear to have the cp command available
You see I tired to move it (as mv command was available), and that failed.
I'm new to Linux, so maybe I missed something obvious?
>adb shell
$ su
su
# mount -o remount,rw /dev/block/mtdblock3 /system
mount -o remount,rw /dev/block/mtdblock3 /system
#
# mv /sdcard/tun.ko /system/lib/modules/tun.ko
mv /sdcard/tun.ko /system/lib/modules/tun.ko
failed on '/sdcard/tun.ko' - Cross-device link

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more coffee, and found CAT is available..
cat /sdcard/tun.ko > /system/lib/modules/tun.ko
appears to have worked, off for some more testing.

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can you share that ?

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Attached is tun.ko that as you will see below appears to run on my 2.1 Streak
VPNC not currently connecting for me though :/
Code:
[email protected]:~/mydroid/kernel-streak$ adb push drivers/net/tun.ko /sdcard/tun.ko
1572 KB/s (161314 bytes in 0.100s)
[email protected]:~/mydroid/kernel-streak$ adb shell
$ su
# mount -o remount,rw /dev/block/mtdblock3 /system
# cat /sdcard/tun.ko > /system/lib/modules/tun.ko
# mount -o remount,ro /dev/block/mtdblock3 /system
# cd /system/lib/modules
# insmod tun.ko
# exit
$ exit
[email protected]:~/mydroid/kernel-streak$

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thank you for sharing. but why doesn't vpnc connect ?

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Sorry don't know why vpnc does not connect.
To be honest, I don't know how to tell tun is running properly.
Any advice, places to check logs etc appreciated.

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Was interested if it worked for you, as I may just have my vpnc config wrong for our work connection.
Nothing bad has happened since I installed, and ran the tun.ko that I attached, but clearly I should say using it is at your own risk.
For example i see:
Known issues¶
Usernames can not contain the @ symbol
and my usernames do have the @ symobol for my work credentials

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w00t! or whatever you say after spending 3 evenings trying to get this working.
Am connected fine, using the tun.ko file I already attached.
Final issue for me was solved by some debug with using a shell on my Streak and command:
Code:
/data/data/org.codeandroid.vpnc_frontend/files/vpnc --script /data/data/org.codeandroid.vpnc_frontend/files/vpnc-script --no-detach --debug 1
To see what was going on, turns out I *just* needed to install Busybox.
So I think what you need to be the same as me is:
2.1 UK Build 6941
Rooted
Busybox install - on marketplace
Then the tun.ko file I posted, and use the commands shown in the same post.
Any problems, just ask.
Did I mention, pretty pleased

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it's obvious that you are pleased
let's see:
I have only Android 1.6 on my Dell Streak.
Would that work ?
it's rooted already.
installing BusyBox right now. (why is that needed btw ?)
done !
copied tun.ko to /system/lib/modules
insmod is fine. I can see the module loaded by "lsmod"
configured my company vpn.
btw, my user also has @ sign , is that a problem ?
leave password empty. it asks for password. fine....
"failed to connect"
what do I have to check ?