Hi Stefan,
On 15 June 2018 at 00:44, Stefan Johansson
wrote:
>
> Hello,
> We have been looking at protecting U-Boot from (malicious) TFTP overwrites.
> We want to do this after our ARMv7 U-Boot has relocated.
>
> The memory map looks like this (I hope):
>
> --- Top of
Hi Stefan,
> Hello,
> We have been looking at protecting U-Boot from (malicious) TFTP
> overwrites. We want to do this after our ARMv7 U-Boot has relocated.
>
> The memory map looks like this (I hope):
>
> --- Top of DRAM
> | U-Boot (Protected)
> |
Hello,
We have been looking at protecting U-Boot from (malicious) TFTP overwrites.
We want to do this after our ARMv7 U-Boot has relocated.
The memory map looks like this (I hope):
--- Top of DRAM
| U-Boot (Protected)
| -- U_Boot_start
| Heap
Hello, Joe
Recently I have repeated my tests.
U-Boot logs along with pcap dump could be found here:
https://mega.co.nz/#!g4UnVaDL!K6ej1OQXg5VE6pU5cmFoELkeqasIDXH1OZbDwdLiXSU
I may be wrong, but after careful examination of these dumps (and older ones), I came to
the following conclusion:
Hello, Joe
Can you provide more exact details on the servers you are trying including
versions?
Perhaps also provide pcap files (not text dumps) so the exact packet contents can be
observed?
Recently I've done some tests, hope you find them interesting.
Server in question:
Linux sterver
On Fri, Feb 20, 2015 at 10:51 AM, PF4Public pf4pub...@mail.ru wrote:
Hello, Nikolay
Now I see, what you mean.
From every dump the requests made by U-Boot are the same. They're as
follows:
00:00:00.000310 IP (tos 0x0, ttl 255, id 11267, offset 0, flags [DF],
proto UDP (17), length 66)
Hi PF4Public,
On 02/20/2015 04:43 PM, PF4Public wrote:
When working with large TFTP packets (probably 4096 bytes, as set in
your board config file), U-Boot TFTP code sends wrong acknowledges for
the TFTP packets.
But what is clear from traffic dumps is that a packet size never exceeds
516
Hello, Nikolay
Now I see, what you mean.
From every dump the requests made by U-Boot are the same. They're as follows:
00:00:00.000310 IP (tos 0x0, ttl 255, id 11267, offset 0, flags [DF], proto UDP (17),
length 66)
192.168.100.88.3821 192.168.100.254.69: 38 RRQ uImage octet timeout 5
Hi,
Here's what I think happens:
When working with large TFTP packets (probably 4096 bytes, as set in
your board config file), U-Boot TFTP code sends wrong acknowledges for
the TFTP packets. If the TFTP server implementation is too strict (the
OpenBSD server is a good example), the transfer
Are you saying that it is completely consistent that when TFTPing from a specific TFTP
server to u-boot you always get these time-outs, but with a different one you never get them?
Exactly. Even when I try to download uImage from kvm host machine, I still got timeouts.
But should I try to
On Fri, Feb 13, 2015 at 8:05 PM, PF4Public pf4pub...@mail.ru wrote:
Hi all
I'm asking for your help to figure out what interferes with u-boot's tftp
in my setup.
I have a custom board with TI OMAP SoC. I'm trying to download uImage
from linux machine via tftp. It fails with timeouts (most of
Hi all
I'm asking for your help to figure out what interferes with u-boot's tftp in my
setup.
I have a custom board with TI OMAP SoC. I'm trying to download uImage from linux machine
via tftp. It fails with timeouts (most of the tries timeout limit exceeds) on several, but
succeeds on others.
,Simran
Date: Thu, 21 Jul 2011 10:24:07 +
Subject: Re: [U-Boot] U-BOOT TFTP
From: vickylinu...@gmail.com
To: simrangill...@hotmail.com
CC: u-boot@lists.denx.de
Hello simran
The things u have to do is check your network connectivity between board
and target .If it is not working after
Hi simran,
you should really provide us with more data to give us even a remote
chance of helping you. What board do you use, what CPU is it, what
U-Boot version do you use? Are you doing a custom U-Boot port or
simply use a well-supported U-Boot configuration from mainline?
Hello, This is
Hello simran
The things u have to do is check your network connectivity between board
and target .If it is not working after that, make a clean u-boot
compilation again with basic configuration(no confusing) of your board
header file and port again.
Regards
Vignesh Rajendran
...@gmail.com
Date: Sun, 17 Jul 2011 18:40:55 -0700
CC: u-boot@lists.denx.de
Subject: Re: [U-Boot] U-BOOT TFTP
Hello,Nothing happens after I run the tftp command. It just returns a new
u-boot prompt with no warnings at all.
Date: Sat, 16 Jul 2011 06:01:27 +
Subject: Re: [U-Boot] U-BOOT TFTP
From
CC: u-boot@lists.denx.de
Subject: Re: [U-Boot] U-BOOT TFTP
Hello,Nothing happens after I run the tftp command. It just returns a new
u-boot prompt with no warnings at all.
Date: Sat, 16 Jul 2011 06:01:27 +
Subject: Re: [U-Boot] U-BOOT TFTP
From: vickylinu...@gmail.com
To: simrangill
Hello,Nothing happens after I run the tftp command. It just returns a new
u-boot prompt with no warnings at all.
Date: Sat, 16 Jul 2011 06:01:27 +
Subject: Re: [U-Boot] U-BOOT TFTP
From: vickylinu...@gmail.com
To: simrangill...@hotmail.com
CC: u-boot@lists.denx.de
Hi
Can u give
Hi
Can u give a clear log about uboot version and what u getting after
executing tftp 100 /tftpboot/uImage.
Regards
Vignesh Rajendran
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Hello,I am running Linux 2.6.34.6 on p4080ds board. I am trying to get the
interfaces running on the kernel but it does not seem to be working. So far I
am able to set up the ipaddress etc for the interface fm1-gb1 but still
cannot ping the outside world. I edited the file /etc/rc.d/rc.conf
Sorry about my last post. I am new and need some help.
Hello,I am developing on freescale P4080DS BOARD. I am trying to put new
kernel image onto the board but need a tftp connection. When I type tftp
100 /tftpboot/uImage nothing happens and the new prompt appears. I was
able to tftp
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