Dlink probably violate GPL again with their DIR-45X ?

[gitime lin]

Hi sfedder,

Thanks a lot!!
I'll try your observation this weekend.
How come you didn't post your observation result to the maillist!
I think if you could organize this result and post it to a blog or to the
maillist will be so great!
So, if some one be able to check if they violate the GPL?


On 9/22/07, Stephen C. Fedder <sfedder at hotmail.com> wrote:
>
>  Hi,
>
>
>
> I looked at the image some more – it is an ext2 filesystem.  You can
> explore it and look at files using a utility called explore2fs.
>
>
>
> The 1st gzipped image is located at offset 0x3DE0 in the file.  That is
> the Linux image.  You can tell the gzip image by the 0x1F 0x8B 0x08 prefix.
> The length of the gzip image is in the 4 bytes just prior to the 0x1F
> (reverse the byte order as it is in small-endian format).  The same goes for
> the other gzip image in the file.
>
>
>
> The Linux version string is:
>
>
>
> Linux version 2.4.25-386 (root at SERVERLINUX) (gcc version 2.96 20000731
> (Red Hat Linux 7.3 2.96-110.1)) #82 Wed Mar 28 17:20:22 CST 2007
>
>
>
> The Linux image contains OpenSwan, among other packages.
>
>
>
> You can download the explore2fs utility from
> http://uranus.it.swin.edu.au/~jn/linux/explore2fs-old.htm<http://uranus.it.swin.edu.au/%7Ejn/linux/explore2fs-old.htm>
>
>
>
> Hope this helps…
>
>
>  ------------------------------
>
> *From:* Stephen C. Fedder [mailto:sfedder at hotmail.com]
> *Sent:* Friday, September 21, 2007 10:21 AM
> *To:* 'gitime lin'
> *Subject:* RE: Dlink probably violate GPL again with their DIR-45X ?
>
>
>
> Hi,
>
>
>
> I downloaded and looked at the image for the DIR-450 Router from the Dlink
> website – it does contain, as you said, a 10mb gzip image that looks like a
> filesystem – it also contains another smaller gzip image (around 2.5mb)
> that contains the initial linux kernel boot load.
>
>
>
> The sequence is header, loader, gzipped linux kernel image, header,
> gzipped filesystem image.  FYI, the filesystem image does not appear to be
> ROMFS – it looks like it may be an ext2 filesystem image for placement on a
> 10mb ram drive.  I'll look at it a bit more to see if I can unpack it.
>
>
>  ------------------------------
>
> *From:* gitime lin [mailto:gitime at gmail.com]
> *Sent:* Thursday, September 20, 2007 10:49 PM
> *To:* legal at lists.gpl-violations.org; tech at lists.gpl-violations.org
> *Subject:* Re: Dlink probably violate GPL again with their DIR-45X ?
>
>
>
> Hi all,
>
> This is the first time I've talk in this list.
> I just care about the GPL-violation affairs.
>
> I did not have a DIR-450 Router.
> Either I did not downloaded the source tarball to check the detail.
> Since I'm a hardware engineer, the C codes is a little bit hard for me to
> understand.
>
> But I've just used madedit to hack and compare the firmware they released.
> After 2 released firmwares has been compared, I've found the image header
> of the firmware might be 48 bytes long (0x40)
> I've found the header appeared twice in the whole image.
> So the structure of firmware I guess looks like the following.
> imghdr-kernel-imghdr-romfs
> or imghdr-romfs-imghdr-kernel.
>
> Then I used madedit (hexeditor) trying to strip the  romfs off.
> Then after a trial-n-error of various compression tools, I've found the
> romfs is compressed by zip!
> The file was cutted according to the first combination.
> imghdr-kernel-imghdr-romfs.
> So I've convinced I have stripped the romfs off.
>
> But I don't know how to inspect the detail of romfs.
> I'm using windows computer for work.
> Since this platform is based on Linux I guess someone might be able to
> help me to look what is inside of it. And see if they really violate the
> GPL?
>
> The cutted-off romfs is 2,916,363 bytes long.
> But after uncompressed by zip, the uncompressed length is 10,240,000 bytes
> long.
>
> What I've stripped is the firmware DIR-450-V1.01-B0013.
> And it both works on DIR-450 Firmware v1.02_1.02.02.
>
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.5.488 / Virus Database: 269.13.27/1020 - Release Date:
> 9/20/2007 12:07 PM
>
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.5.488 / Virus Database: 269.13.27/1020 - Release Date:
> 9/20/2007 12:07 PM
>
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