[Isl3893-devel] what's the layout of wet54gv2's firmware?

[twmt]

hello everyone!

I am trying to modify the firmware of WET54Gv2, and I check the internet to
find some description about isl3893.(
http://student.kuleuven.be/~s0169612/isl3893.html)

isl3893 firmware is componsed of Boot+MVC+(kernel+romfs)+cramfs, which can
be extrac by use the script(
http://student.kuleuven.be/~s0169612/isl3893/firmware_extract.sh) but I
can't use it to get romfs from the wetgv2_210.img which was downloaded from
linksys website(
http://www-cn.linksys.com/servlet/Satellite?blobcol=urldata&blobheadername1=Content-Type&blobheadername2=Content-Disposition&blobheadervalue1=application%2Fzip&blobheadervalue2=inline%3B+filename%3Dwet54gv2_210%252C2.zip&blobkey=id&blobtable=MungoBlobs&blobwhere=1130826470245&ssbinary=true
).

So, my questions are:
1. what's the difference of firmware layout between isl3893 and wet54gv2 ?
2. How can I changed the romfs of wet54gv2's firmware?

Any suggestion is appreciated!

Thanks in advanced!

[Roland Mieslinger]

-------- Original-Nachricht --------

Post by twmt
but I
can't use it to get romfs from the wetgv2_210.img which was downloaded from
linksys website(

what did you get instead?
firmware_extract.sh uses hardcoded adresses for the different blocks within the image, maybe thats the problem)

Post by twmt
1. what's the difference of firmware layout between isl3893 and wet54gv2?

isl3893 is a platform, wet54gv2 a product based on it. There a minor differences in firmeware layout for some products (long time ago, so I'm not sure but wet54 uses gzip instead of bzip2 to compress kernel + romfs)

Post by twmt
2. How can I changed the romfs of wet54gv2's firmware?

???

Roland

[twmt]

I found "1f 8b 08" in 207.img at the address 0x1BA24, wet54gv2 uses gzip.

but after I execute the command
dd if=207.img skip=`echo "ibase=16; 1BA24" | bc` bs=1 of=207new.img.gz
gunzip 207new.img.gz
mount -o loop 207new.img /mnt <<<------here got error

here, I got error message:
"FAT: bogus logical sector size 3301
VFS: Can't find a valid FAT filesystem on dev 07:00
mount: you must specify the filesystem type"

what's wrong with it?
How can I get the romfs?

Thanks!

I got wet54gv2-207.img and wet54gv2_210.img from linksys official

website,
the difference from 207 to 210 is only the disabled telnet on 210 in
/etc/startup.list

I try to anaysis those images according to the
artical( http://student.kuleuven.be/~s0169612/isl3893 ).
what's puzzling me is that I didn't got "BZh" in 207 version while I got

it

in 210 image.
why it is different?

i need to check that as well
regards

what sources do you use?
i think, that there are no big changes between both systems.
i was running for testing the original linksys firmware on an xg2000

system.

linksys, xg2000 and other systems are build by the same image layout.
only the 3com and smc systems have strange images which are not the

same.

ulf

Post by twmt
hello everyone!
I am trying to modify the firmware of WET54Gv2, and I check the

internet

to

Post by twmt
find some description about
isl3893.(

http://student.kuleuven.be/~s0169612/isl3893.html

Post by twmt
)
isl3893 firmware is componsed of Boot+MVC+(kernel+romfs)+cramfs,

which

can

Post by twmt
be extrac by use the
script(

http://student.kuleuven.be/~s0169612/isl3893/firmware_extract.sh )

Post by twmt
but I can't use it to get romfs from the wetgv2_210.img which was
downloaded from linksys website(

http://www-cn.linksys.com/servlet/Satellite?blobcol=urldata&blobheadername1=Content-Type&blobheadername2=Content-Disposition&blobheadervalue1=application%2Fzip&blobheadervalue2=inline%3B+filename%3Dwet54gv2_210%252C2.zip&blobkey=id&blobtable=MungoBlobs&blobwhere=1130826470245&ssbinary=true

Post by twmt
).
1. what's the difference of firmware layout between isl3893 and

wet54gv2

?

Post by twmt
2. How can I changed the romfs of wet54gv2's firmware?
Any suggestion is appreciated!
Thanks in advanced!

-------------------------------------------------------------------------

Post by twmt
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Post by twmt
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Post by twmt
_______________________________________________
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--
Regards
twmt

[Roland Mieslinger]

try: mount -o loop -t romfs 207new.img /mnt


-------- Original-Nachricht --------
Datum: Fri, 13 Apr 2007 19:28:11 +0800
Von: twmt <***@gmail.com>
An: "ulf kypke" <***@gmail.com>, ***@gmx.de, isl3893-***@lists.sourceforge.net
Betreff: Re: [Isl3893-devel] what\'s the layout of wet54gv2\'s firmware?

Post by twmt
I found "1f 8b 08" in 207.img at the address 0x1BA24, wet54gv2 uses gzip.
but after I execute the command
dd if=207.img skip=`echo "ibase=16; 1BA24" | bc` bs=1 of=207new.img.gz
gunzip 207new.img.gz
mount -o loop 207new.img /mnt <<<------here got error
"FAT: bogus logical sector size 3301
VFS: Can't find a valid FAT filesystem on dev 07:00
mount: you must specify the filesystem type"
what's wrong with it?
How can I get the romfs?
Thanks!

I got wet54gv2-207.img and wet54gv2_210.img from linksys official

website,
the difference from 207 to 210 is only the disabled telnet on 210 in
/etc/startup.list

I try to anaysis those images according to the
artical( http://student.kuleuven.be/~s0169612/isl3893 ).
what's puzzling me is that I didn't got "BZh" in 207 version while I

got

it

in 210 image.
why it is different?

i need to check that as well
regards

what sources do you use?
i think, that there are no big changes between both systems.
i was running for testing the original linksys firmware on an xg2000

system.

linksys, xg2000 and other systems are build by the same image

layout.

only the 3com and smc systems have strange images which are not the

same.

ulf

Post by twmt
hello everyone!
I am trying to modify the firmware of WET54Gv2, and I check the

internet

to

Post by twmt
find some description about
isl3893.(

http://student.kuleuven.be/~s0169612/isl3893.html

Post by twmt
)
isl3893 firmware is componsed of Boot+MVC+(kernel+romfs)+cramfs,

which

can

Post by twmt
be extrac by use the
script(

http://student.kuleuven.be/~s0169612/isl3893/firmware_extract.sh )

Post by twmt
but I can't use it to get romfs from the wetgv2_210.img which was
downloaded from linksys website(

http://www-cn.linksys.com/servlet/Satellite?blobcol=urldata&blobheadername1=Content-Type&blobheadername2=Content-Disposition&blobheadervalue1=application%2Fzip&blobheadervalue2=inline%3B+filename%3Dwet54gv2_210%252C2.zip&blobkey=id&blobtable=MungoBlobs&blobwhere=1130826470245&ssbinary=true

Post by twmt
).
1. what's the difference of firmware layout between isl3893 and

wet54gv2

?

Post by twmt
2. How can I changed the romfs of wet54gv2's firmware?
Any suggestion is appreciated!
Thanks in advanced!

-------------------------------------------------------------------------

Post by twmt
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to

share

your

Post by twmt
opinions on IT & business topics through brief surveys-and earn

cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV

Post by twmt
_______________________________________________
Isl3893-devel mailing list

https://lists.sourceforge.net/lists/listinfo/isl3893-devel
--
Regards
twmt

--
Regards
twmt