Thanks a lot for clearing some of this up!
So I'm trying to get a mesh network running for a university project using
AHCPD/Babel.
The goal would be for a Ethernet connected node (beaglebone) to use DHCP to
acquire an IP address, and then it would share it's internet connection
over ad-hoc wlan with it's peers (also beaglebones).
If I can't get AHCPD/Babel to run properly, I'll probably just use a
regular ad-hoc network with static IPs. ('m severely time-constrained as
this project is due by the end of the semester... and this is only a part
of it!)
Yes I have got my wifi module working, I was already able to ping
google.com from wireless ad-hoc beaglebones over my laptop's eth0 which was
awesome!
Now I just want to replicate this with only beaglebones, which is why I
need the kernel changes for NAT.
I do have a microSD card for testing. I ran into some complications last
night trying to format the card properly because the mkcard.sh script was
not working for me.
I followed some of the instructions here
http://derekmolloy.ie/custom-kernel-and-angstrom-distribution-recipe/.
Do you know of any good guides for testing the kernel? I didn't know you
could test it before flashing it.
I'm also still trying to work through bitbake and just building the custom
kernel. It's been difficult to distinguish how the images get built, since
there are lots of defconfigs (ti-linux-psp-3.2 vs. linux-mainline-3.8.0)
and I'm unsure how they all get tied together.
Thanks again,
Mark
On Wednesday, February 12, 2014 9:39:59 AM UTC-5, [email protected] wrote:
>
> Some further comments:
>
> You don't need to rebuild MLO/u-boot.img
> You don't need a serial cable. It can be helpful for debugging, but
> thats all.
> Have you got the wifi device working correctly on your BBB?
>
> I would recommend you get an micro SD card for testing your new
> kernel, before you copy it to eMMC.
>
> Regards ...
>
> On Tuesday, February 11, 2014 6:45:31 AM UTC+11, Mark Hatch wrote:
>>
>>
>> Hi friends,
>>
>> Total newbie here, so forgive me.
>>
>> I<http://www.meadios.com/2012/01/building-angstrom-using-bitbake-and-openembedded/>'m
>>
>> trying to add functionality to iptables so I can use the BBB as a ad-hoc
>> "router", sharing it's Ethernet connection with others.
>>
>> From what I've gleamed so far I need to add that functionality by
>> recompiling the kernel.
>>
>> So following the links at http://www.angstrom-distribution.org/ i cloned
>> the setup-scripts.
>>
>> MACHINE=beaglebone ./oebb.sh config beaglebone
>>
>> MACHINE=beagleboard ./oebb.sh update
>>
>> . environment-angstrom-v2013.06
>>
>> bitbake -c menuconfig virtual/kernel
>>
>> I then change the options I need, but when I built it made a zImage
>> file... Which confuses me.
>>
>> Now what I don't understand is that the image I want should be based off
>> the regular systemd image.
>>
>>
>> -
>>
>> bitbake systemd-image
>>
>>
>> How do I update the kernel configuration from the systemd image without
>> just building the regular image?
>>
>> A step-by-step explanation would be awesome, cause I've never
>> customized/built the linux kernel before.
>> I also do not have a serial cable yet. Is this necessary for running a
>> custom kernel? Do options in u-boot need to be changed?
>>
>> I'm sure I'm asking all the wrong questions, but would really appreciate
>> some help!
>>
>> Here are the options that I need:
>>
>> Networking ---->
>> Networking options ---->
>> Network packet filtering framework (Netfilter)--->
>> Core Netfilter Configuration ---->
>> <*> Netfilter connection tracking support
>> <*> Netfilter Xtables support (required for ip_tables)
>> <*> "NFLOG" target support
>> <*> "conntrack" connection tracking match support
>> <*> "state" match support
>> IP: Netfilter Configuration --->
>> <*> IPv4 connection tracking support (required for NAT)
>> <*> IP tables support (required for filtering/masq/NAT)
>> <*> Packet Filtering
>> <*> REJECT target support
>> <*> Full NAT
>> <*> MASQUERADE target support
>> <*> Packet mangling
>>
>>
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