Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Joe Hershberger]

On Wed, Sep 30, 2015 at 9:12 AM, Jacob Stiffler  wrote:
> The net_boot_file_name buffer is used as storage for the bootfilename
> command line argument to network boot commands such as tftp and nfs.
>
> Increase the size of this buffer to 1024 bytes as the current size of
> 128 bytes is restrictive for arbitrary paths on the server.
>
> Signed-off-by: Jacob Stiffler 

Applied to u-boot-net/master, thanks!
-Joe
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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Joe Hershberger]

Hi Jacob,

On Wed, Sep 30, 2015 at 9:12 AM, Jacob Stiffler  wrote:
> The net_boot_file_name buffer is used as storage for the bootfilename
> command line argument to network boot commands such as tftp and nfs.
>
> Increase the size of this buffer to 1024 bytes as the current size of
> 128 bytes is restrictive for arbitrary paths on the server.
>
> Signed-off-by: Jacob Stiffler 

Acked-by: Joe Hershberger 
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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Jacob Stiffler]

On Sat, Oct 3, 2015 at 11:13 AM, Stefan Bruens
 wrote:
> On Thursday 01 October 2015 16:27:11 Wolfgang Denk wrote:
>> Dear Jacob,
>>
>> In message <1443622325-30792-1-git-send-email-j-stiff...@ti.com> you wrote:
>> > The net_boot_file_name buffer is used as storage for the bootfilename
>> > command line argument to network boot commands such as tftp and nfs.
>> >
>> > Increase the size of this buffer to 1024 bytes as the current size of
>> > 128 bytes is restrictive for arbitrary paths on the server.
>>
>> According to RFC 2131, the boot file name has a fixed size of 128
>> octets.
>
> You can also put the file name into Option 67, which results in a length limit
> of 255 octets (DHCP option length limit).
>
> I sent patches with several DHCP enhancements, including Option 67 support, to
> the ML a few weeks ago.

Has those patches been applied? otherwise it would be good to rebase
it and send them again as we are close of release and merge window
will soon open.

The intent of this patch is not to increase the size of the path for bootp, but 
to
increase the size of the path for nfs and tftp. The "net_boot_file_name" is a 
common
global variable used for all network commands which load files into memory, and 
is
basically temporary storage.




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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Stefan Bruens]

On Thursday 01 October 2015 16:27:11 Wolfgang Denk wrote:
> Dear Jacob,
> 
> In message <1443622325-30792-1-git-send-email-j-stiff...@ti.com> you wrote:
> > The net_boot_file_name buffer is used as storage for the bootfilename
> > command line argument to network boot commands such as tftp and nfs.
> > 
> > Increase the size of this buffer to 1024 bytes as the current size of
> > 128 bytes is restrictive for arbitrary paths on the server.
> 
> According to RFC 2131, the boot file name has a fixed size of 128
> octets.

You can also put the file name into Option 67, which results in a length limit 
of 255 octets (DHCP option length limit).

I sent patches with several DHCP enhancements, including Option 67 support, to 
the ML a few weeks ago.

Kind regards,

Stefan

-- 
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work: +49 2405 49936-424
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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Otavio Salvador]

On Sat, Oct 3, 2015 at 11:13 AM, Stefan Bruens
 wrote:
> On Thursday 01 October 2015 16:27:11 Wolfgang Denk wrote:
>> Dear Jacob,
>>
>> In message <1443622325-30792-1-git-send-email-j-stiff...@ti.com> you wrote:
>> > The net_boot_file_name buffer is used as storage for the bootfilename
>> > command line argument to network boot commands such as tftp and nfs.
>> >
>> > Increase the size of this buffer to 1024 bytes as the current size of
>> > 128 bytes is restrictive for arbitrary paths on the server.
>>
>> According to RFC 2131, the boot file name has a fixed size of 128
>> octets.
>
> You can also put the file name into Option 67, which results in a length limit
> of 255 octets (DHCP option length limit).
>
> I sent patches with several DHCP enhancements, including Option 67 support, to
> the ML a few weeks ago.

Has those patches been applied? otherwise it would be good to rebase
it and send them again as we are close of release and merge window
will soon open.

-- 
Otavio Salvador O.S. Systems
http://www.ossystems.com.brhttp://code.ossystems.com.br
Mobile: +55 (53) 9981-7854Mobile: +1 (347) 903-9750
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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Wolfgang Denk]

Dear Jacob,

In message <1443622325-30792-1-git-send-email-j-stiff...@ti.com> you wrote:
> The net_boot_file_name buffer is used as storage for the bootfilename
> command line argument to network boot commands such as tftp and nfs.
> 
> Increase the size of this buffer to 1024 bytes as the current size of
> 128 bytes is restrictive for arbitrary paths on the server.

According to RFC 2131, the boot file name has a fixed size of 128
octets.

Best regards,

Wolfgang Denk

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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Jacob Stiffler]

On 10/1/2015 10:27 AM, Wolfgang Denk wrote:

Dear Jacob,

In message <1443622325-30792-1-git-send-email-j-stiff...@ti.com> you wrote:

The net_boot_file_name buffer is used as storage for the bootfilename
command line argument to network boot commands such as tftp and nfs.

Increase the size of this buffer to 1024 bytes as the current size of
128 bytes is restrictive for arbitrary paths on the server.

According to RFC 2131, the boot file name has a fixed size of 128
octets.


Wolfgang,

Yes. However, the global "net_boot_file_name" is not only used for 
BOOTP, but also for NFS and TFTP.


"net_boot_file_name" appears to be temporary storage to supply the file 
path to arbitrary protocols from the command line arguments.


The "file" field in the bootp message is fixed at 128 octets in the 
"bootp_hdr" structure.


The contents of "net_boot_file_name" are read or written using the 
standard "strncopy()" or the similar "copy_filename()", so there should 
be any issue with respect to memory leaks.


Thank you,
Jacob Stiffler


Best regards,

Wolfgang Denk



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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Wolfgang Denk]

Dear Jacob,

In message <560d6de3.8070...@ti.com> you wrote:
> 
> Yes. However, the global "net_boot_file_name" is not only used for 
> BOOTP, but also for NFS and TFTP.
> 
> "net_boot_file_name" appears to be temporary storage to supply the file 
> path to arbitrary protocols from the command line arguments.

I see.

> The "file" field in the bootp message is fixed at 128 octets in the 
> "bootp_hdr" structure.
> 
> The contents of "net_boot_file_name" are read or written using the 
> standard "strncopy()" or the similar "copy_filename()", so there should 
> be any issue with respect to memory leaks.

I guess you mean there should NOT be any issue?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,  Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
Anarchy may not be the best form of government, but it's better  than
no government at all.
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Re: [U-Boot] [PATCH] net: Increase the size of the net_boot_file_name buffer

[Jacob Stiffler]

On 10/1/2015 4:07 PM, Wolfgang Denk wrote:

Dear Jacob,

In message <560d6de3.8070...@ti.com> you wrote:

Yes. However, the global "net_boot_file_name" is not only used for
BOOTP, but also for NFS and TFTP.

"net_boot_file_name" appears to be temporary storage to supply the file
path to arbitrary protocols from the command line arguments.

I see.


The "file" field in the bootp message is fixed at 128 octets in the
"bootp_hdr" structure.

The contents of "net_boot_file_name" are read or written using the
standard "strncopy()" or the similar "copy_filename()", so there should
be any issue with respect to memory leaks.

I guess you mean there should NOT be any issue?


Yes, sorry. There should not be any issue with respect to memory leaks.

Thank you,
Jacob Stiffler


Best regards,

Wolfgang Denk



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