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Gerardo Exequiel Pozzi

2013-Jun-06 00:29 UTC

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

Hello,

First, this setup works fine without any error in syslinux 4.06 as show
below.

For convenience, both versions of syslinux 4.06 [#1] and 5.10 [#2]
directories (~2MB each) are uploaded ready for test.

As said before, this is tested on qemu-1.5.0 + dnsmasq 2.66 in Arch
Linux @ 64-bit.

If more info is needed, please let me know.


Good luck!


Relevant directory structure is at
/run/archiso/bootmnt/arch/boot/syslinux/*.{c32,0,cfg} Where each *.cfg
relevant for PXE booting are:

------------------------------------------------------------------------
------------------------------------------------------------------------
# cat /run/archiso/bootmnt/arch/boot/syslinux/archiso.cfg
DEFAULT select

LABEL select
COM32 boot/syslinux/whichsys.c32
APPEND -pxe- pxe -sys- sys -iso- sys

LABEL pxe
CONFIG boot/syslinux/archiso_pxe_choose.cfg

LABEL sys
CONFIG boot/syslinux/archiso_sys_choose.cfg
------------------------------------------------------------------------
------------------------------------------------------------------------
#cat /run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe_choose.cfg
DEFAULT choose

LABEL choose
COM32 boot/syslinux/ifcpu64.c32
APPEND have64 -- nohave64

LABEL have64
CONFIG boot/syslinux/archiso_pxe_both_inc.cfg

LABEL nohave64
CONFIG boot/syslinux/archiso_pxe_32_inc.cfg
------------------------------------------------------------------------
------------------------------------------------------------------------
# cat /run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe_both_inc.cfg
INCLUDE boot/syslinux/archiso_head.cfg
INCLUDE boot/syslinux/archiso_pxe64.cfg
INCLUDE boot/syslinux/archiso_pxe32.cfg
INCLUDE boot/syslinux/archiso_tail.cfg
------------------------------------------------------------------------
------------------------------------------------------------------------
# cat /run/archiso/bootmnt/arch/boot/syslinux/archiso_head.cfg
SERIAL 0 38400
UI boot/syslinux/vesamenu.c32
MENU TITLE Arch Linux
MENU BACKGROUND boot/syslinux/splash.png
...
...
------------------------------------------------------------------------
------------------------------------------------------------------------
# cat /run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe64.cfg
TEXT HELP
Boot the Arch Linux (x86_64) live medium (Using NBD).
It allows you to install Arch Linux or perform system maintenance.
ENDTEXT
MENU LABEL Boot Arch Linux (x86_64) (NBD)
LINUX boot/x86_64/vmlinuz
INITRD boot/x86_64/archiso.img
APPEND archisobasedir=arch archisolabel=ARCH_201306
archiso_nbd_srv=${pxeserver}
IPAPPEND 3
...
...
------------------------------------------------------------------------
------------------------------------------------------------------------


OK here I go...

This is how dnsmasq running in dhcp + tftp mode output looks, working
fine when using syslinux-4.06. Note how each retrieved entry is
"perfect", no double //, no paths error, and things looks good.


dnsmasq --port=0 \
          --no-daemon \
          --enable-tftp \
          --tftp-root=/run/archiso/bootmnt \
          --dhcp-range=192.168.0.2,192.168.0.254,86400 \
          --dhcp-boot=/arch/boot/syslinux/pxelinux.0 \
          --dhcp-option-force=209,boot/syslinux/archiso.cfg \
          --dhcp-option-force=210,/arch/


------------------------------------------------------------------------
------------------------------------------------------------------------
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/pxelinux.0 to
192.168.0.90
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/archiso.cfg
to 192.168.0.90
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/whichsys.c32
to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe_choose.cfg to
192.168.0.90
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/ifcpu64.c32
to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe_both_inc.cfg to
192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_head.cfg to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe64.cfg to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe32.cfg to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_tail.cfg to 192.168.0.90
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/vesamenu.c32
to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe_both_inc.cfg to
192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_head.cfg to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe64.cfg to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_pxe32.cfg to 192.168.0.90
dnsmasq-tftp: sent
/run/archiso/bootmnt/arch/boot/syslinux/archiso_tail.cfg to 192.168.0.90
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/splash.png to
192.168.0.90
------------------------------------------------------------------------
------------------------------------------------------------------------

This is when using http (darkhttpd) instead of tftp for retriving files
(syslinux-4.06). Note how each retrieved entry is "perfect", no double
//, no paths error, and things looks good.


dnsmasq --port=0 \
          --dhcp-range=192.168.0.2,192.168.0.254,86400 \
          --dhcp-boot=http://192.168.0.218/arch/boot/syslinux/pxelinux.0 \
          --dhcp-option-force=209,boot/syslinux/archiso.cfg \
          --dhcp-option-force=210,http://192.168.0.218/arch/

darkhttpd /run/archiso/bootmnt

------------------------------------------------------------------------
------------------------------------------------------------------------
1370470692 192.168.0.90 "GET /arch/boot/syslinux/pxelinux.0" 200 26813
"" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso.cfg" 200 441
""
"iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/whichsys.c32" 200
3193
"" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET
/arch/boot/syslinux/archiso_pxe_choose.cfg"
200 439 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/ifcpu64.c32" 200 1545
"" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET
/arch/boot/syslinux/archiso_pxe_both_inc.cfg" 200 390 ""
"iPXE/1.0.0+
(09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_head.cfg" 200
1041 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_pxe64.cfg"
200
1259 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_pxe32.cfg"
200
1235 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_tail.cfg" 200
849 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/vesamenu.c32" 200
153723 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET
/arch/boot/syslinux/archiso_pxe_both_inc.cfg" 200 390 ""
"iPXE/1.0.0+
(09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_head.cfg" 200
1041 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_pxe64.cfg"
200
1259 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_pxe32.cfg"
200
1235 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/archiso_tail.cfg" 200
849 "" "iPXE/1.0.0+ (09c5)"
1370470692 192.168.0.90 "GET /arch/boot/syslinux/splash.png" 200 45619
"" "iPXE/1.0.0+ (09c5)"
------------------------------------------------------------------------
------------------------------------------------------------------------


And now syslinux-5.10:

The same result is using pxelinux.0 or lpxelinux.0

See how paths are wrong, or not clean: no slash "/" between directory
and filename, double // (this do not care) or double directory
/arch//arch//, etc.
------------------------------------------------------------------------
------------------------------------------------------------------------
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/lpxelinux.0
to 192.168.0.90
dnsmasq-tftp: file /run/archiso/bootmnt/arch/ldlinux.c32 not found
dnsmasq-tftp: file /run/archiso/bootmnt/arch//ldlinux.c32 not found
dnsmasq-tftp: file /run/archiso/bootmnt/arch//boot/isolinux/ldlinux.c32
not found
dnsmasq-tftp: file /run/archiso/bootmnt/arch//isolinux/ldlinux.c32 not found
dnsmasq-tftp: file /run/archiso/bootmnt/arch//boot/syslinuxldlinux.c32
not found
dnsmasq-tftp: sent /run/archiso/bootmnt/arch//boot/syslinux/ldlinux.c32
to 192.168.0.90
dnsmasq-tftp: error 0 No error, file close received from 192.168.0.90
dnsmasq-tftp: failed sending
/run/archiso/bootmnt/arch//boot/syslinux/ldlinux.c32 to 192.168.0.90
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/archiso.cfg
to 192.168.0.90
dnsmasq-tftp: sent /run/archiso/bootmnt/arch/boot/syslinux/whichsys.c32
to 192.168.0.90
dnsmasq-tftp: file /run/archiso/bootmnt/arch/libcom32.c32 not found
dnsmasq-tftp: file /run/archiso/bootmnt/arch//libcom32.c32 not found
dnsmasq-tftp: file /run/archiso/bootmnt/arch/libcom32.c32 not found
dnsmasq-tftp: file
/run/archiso/bootmnt/arch//arch//boot/syslinux/libcom32.c32 not found
------------------------------------------------------------------------
------------------------------------------------------------------------

In HTTP, no other files are retrieved, syslinux-5.10 just shows a boot
error when using http instead of tftp. (5.02-pre1 at least retrive more
files, but with errors like in tftp mode [#3]).

------------------------------------------------------------------------
------------------------------------------------------------------------
1370470298 192.168.0.90 "GET /arch/boot/syslinux/lpxelinux.0" 200
81474
"" "iPXE/1.0.0+ (09c5)"
------------------------------------------------------------------------
------------------------------------------------------------------------


[#1]
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_406.tar.xz
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_406.tar.xz.sig

[#2]
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_510.tar.xz
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_510.tar.xz.sig

[#3] http://www.syslinux.org/archives/2013-February/019480.html



-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1

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Gene Cumm

2013-Jun-06 05:00 UTC

head link

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

On Wed, Jun 5, 2013 at 8:29 PM, Gerardo Exequiel Pozzi
<vmlinuz386 at yahoo.com.ar> wrote:> Hello,
>
> First, this setup works fine without any error in syslinux 4.06 as show
> below.
>
> For convenience, both versions of syslinux 4.06 [#1] and 5.10 [#2]
> directories (~2MB each) are uploaded ready for test.
>
> As said before, this is tested on qemu-1.5.0 + dnsmasq 2.66 in Arch
> Linux @ 64-bit.
>
> If more info is needed, please let me know.
iPXE details.  My testing was with an Intel PXE OROM in a VMware
hosted platform with 0 issues.
> 1370470692 192.168.0.90 "GET /arch/boot/syslinux/pxelinux.0" 200
26813
> "" "iPXE/1.0.0+ (09c5)"
--
-Gene

Thomas Bächler

2013-Jun-06 08:25 UTC

head link

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

Am 06.06.2013 07:00, schrieb Gene Cumm:> iPXE details.  My testing was with an Intel PXE OROM in a VMware
> hosted platform with 0 issues.
> 
>> 1370470692 192.168.0.90 "GET /arch/boot/syslinux/pxelinux.0"
200 26813
>> "" "iPXE/1.0.0+ (09c5)"
This is the iPXE version that comes bundled with qemu as the default
qemu boot rom.

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Gerardo Exequiel Pozzi

2013-Jun-06 23:02 UTC

head link

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

On 06/06/2013 02:00 AM, Gene Cumm wrote:> On Wed, Jun 5, 2013 at 8:29 PM, Gerardo Exequiel Pozzi
> <vmlinuz386 at yahoo.com.ar> wrote:
>> Hello,
>>
>> First, this setup works fine without any error in syslinux 4.06 as show
>> below.
>>
>> For convenience, both versions of syslinux 4.06 [#1] and 5.10 [#2]
>> directories (~2MB each) are uploaded ready for test.
>>
>> As said before, this is tested on qemu-1.5.0 + dnsmasq 2.66 in Arch
>> Linux @ 64-bit.
>>
>> If more info is needed, please let me know.
> 
> iPXE details.  My testing was with an Intel PXE OROM in a VMware
> hosted platform with 0 issues.
Just to be sure, a stupid question, sorry: do you run my testcase [#1],
or another thing? The output of dnsmasq is clean/right in all file paths?

Remember that syslinux 4.06 testcase works OK.

Thanks for your time ;)


[#1]
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_510.tar.xz

-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1

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Matt Fleming

2013-Jun-07 09:30 UTC

head link

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

On Wed, 05 Jun, at 09:29:58PM, Gerardo Exequiel Pozzi
wrote:> dnsmasq-tftp: file /run/archiso/bootmnt/arch/libcom32.c32 not found
> dnsmasq-tftp: file /run/archiso/bootmnt/arch//libcom32.c32 not found
> dnsmasq-tftp: file /run/archiso/bootmnt/arch/libcom32.c32 not found
> dnsmasq-tftp: file
> /run/archiso/bootmnt/arch//arch//boot/syslinux/libcom32.c32 not found 
OK, here's the bug - the double /arch. Let me take a look at what's
going on inside PXELINUX.

-- 
Matt Fleming, Intel Open Source Technology Center

Gene Cumm

2013-Jun-07 14:52 UTC

head link

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

On Wed, Jun 5, 2013 at 8:29 PM, Gerardo Exequiel Pozzi
<vmlinuz386 at yahoo.com.ar> wrote:
> [#1]
> https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_406.tar.xz
>
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_406.tar.xz.sig
>
> [#2]
> https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_510.tar.xz
>
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_510.tar.xz.sig
Did dropbox decompress these or were they never compressed?

--
-Gene

Gerardo Exequiel Pozzi

2013-Jun-07 16:17 UTC

head link

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

On 06/07/2013 11:52 AM, Gene Cumm wrote:> On Wed, Jun 5, 2013 at 8:29 PM, Gerardo Exequiel Pozzi
> <vmlinuz386 at yahoo.com.ar> wrote:
> 
>> [#1]
>>
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_406.tar.xz
>>
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_406.tar.xz.sig
>>
>> [#2]
>>
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_510.tar.xz
>>
https://dl.dropboxusercontent.com/u/88891866/archiso_syslinux_510.tar.xz.sig
> 
> Did dropbox decompress these or were they never compressed?
Oops, never compressed!. I did "tar cf" instead of "tar
caf".



-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1

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Matt Fleming

2013-Jun-07 21:53 UTC

head link

[syslinux] [5.10] PXE + dhcp opts 209, 210 and path issues in tftp/http

On Fri, 07 Jun, at 10:30:11AM, Matt Fleming wrote:> On Wed, 05 Jun, at 09:29:58PM, Gerardo Exequiel Pozzi wrote:
> > dnsmasq-tftp: file /run/archiso/bootmnt/arch/libcom32.c32 not found
> > dnsmasq-tftp: file /run/archiso/bootmnt/arch//libcom32.c32 not found
> > dnsmasq-tftp: file /run/archiso/bootmnt/arch/libcom32.c32 not found
> > dnsmasq-tftp: file
> > /run/archiso/bootmnt/arch//arch//boot/syslinux/libcom32.c32 not found
>  
> OK, here's the bug - the double /arch. Let me take a look at what's
> going on inside PXELINUX.
Right, basically the internal PATH variable that keeps a list of
directories in which to search for files doesn't play well when it
encounters TFTP-style paths.

The entire problem stems from the fact that colons (':') are used to
separate entries in the PATH directive and they're also used in
TFTP-style paths. While I see that you don't use the PATH directive in
your config files, a list is built internally nevertheless. Based on my
testing your's will look something like,

  "::/arch/boot/syslinux/"

The code in findpath() sees the first ':' and goes nutso.

I'm not quite sure what the proper solution is. Clearly using ':' to
separate entries was a terrible idea, but presumably some people are
using that syntax now and it would cause issues if we changed it - the
PATH directive has been supported since 5.00.

-- 
Matt Fleming, Intel Open Source Technology Center

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