Erwan's Blog – Page 15 – Yes : again another blog…

SDR as in Software Defined Radio Part 1

arduino 1 Response »

Sep 192014

Finally received my DVB-T/DAB/FM dongle and more precisely my R820T tuner.

This, with the proper drivers (here), will allow me to « listen » to my RF433 radio devices.

Even better I can record my signal in audacity using a « virtual audio cable« . (note that are free alternatives).

Or else I can display my packets using rtl_433_win32 (although not decoded properly).

Note : ab 53 32 cb 54 d5 4b 2a 80 is a chacon remote control (to switch on/off a 220v plug outlet).

We can see in audacity the pattern repeated 5 times.

Zooming in one pattern, we can see high and low bits.

Now the challenge is the following :
-snif a RF433 packet and decode it
-replay it with my Arduino+CC1101

How fun 🙂

Tiny PXE Server and UEFI booting

Boot, TinyPXE Server 19 Responses »

Sep 072014

Latest Tiny PXE Server now handles the client system architecture (BIOS, UEFI x32, UEFI x64, etc …).

This allows one to provide the right boot filename based on the client architecture.

Below Tiny PXE Server will send pxeboot.n12 as boot filename (which will chain to bootmgr) and will indicate 00000\bcd as BCD file in BIOS mode.
If UEFI x64 (00007) is detected, and [arch] section filled in the config.ini, it will send bootx64.efi as boot filename and will indicate 00007\bcd as BCD.

See the [arch] section in the config.ini

[arch] 00006=bootia32.efi 00007=bootx64.efi

Tiny PXE Server

Discuss it here.

Tiny PXE Server 1.0.0.18 is out

Boot, TinyPXE Server No Responses »

Sep 072014

Latest changelog :

added : @arch variable can be used in the altfilename (next to @mac and @ip). 00000 = bios, 00006=efi32, etc … see https://www.rfc-editor.org/rfc/rfc4578.txt
fixed : tftpd will also bind if option is checked
modified : if the root folder in config.ini is incorrect, it will be set to the exe current directory
modified : if the filename cannot be resolved (like when using @arch or @mac), it will not prevent execution
modified : tftp will display the full path (within root) for a file request
added : @arch will also be used in opt252
fixed : opt67 in the config.ini would not set the root folder
added : [arch] section in config.ini optional, applies to filename and opt67. ex values -> 00006=bootia32.efi, 00007=bootx64.efi, etc …
added : support for nics.txt for BINL (overule the inf parsing)
fixed : opt13 was incorrect when loading a filename thru config.ini
fixed : opt13 was incorrect when using arch=00007/00006
fixed : when using opt67, would crash if [arch] section was missing
added : can re load settings from config.ini
added : can save settings to config.ini
added : smb checkbox
fixed : httpd uses fmShareDenyWrite to allow multiple i/o to one file
added : sent bootp packet will be word aligned
added : will replace \0 by null char for opt60,66,67 (some pxe clients require a null terminated string there)
added : attempt to support rfc951 = boot request will be handled as dhcp request (rfc951=1 in config.ini)
added : no_hostname=1 in config.ini to skip the server hostname field
changed : if opt54=’0.0.0.0′ then skip in makebootp_vend (useless?)
added : no_opt13=1 in config.ini to skip option 13
changed : opt53 skipped if bootp request (i.e not a dhcp request) to be compatible with bootp clients

Discuss it here.
Download here.

QuickPE : now UEFI compliant

Boot, WinPE No Responses »

Août 262014

UEFI is more and more common on new computers.

It was time for an update within QuickPE to support UEFI.

Once you have generated your Windows X64 UEFI compliant iso, I suggest using Rufus to burn it to a USB key.
Make sure to select GPT for UEFI as partition type and FAT32 as filesystem or else you’ll be booting in BIOS mode.

QCOW proxy for ImDisk

delphi No Responses »

Août 012014

In a previous article, I showed how to setup a « proxy » for ImDisk thru devio to mount an EWF file.

This time, lets do it with a QCOW file (using external libyal library).

The command lines for the proxy and ImDisk are below :

devio --dll=proxy.dll;dllopen shm:test_proxy c:\test.qcow
imdisk -a -t proxy -o shm -o ro -f test_proxy -m Z:

Find the proxy here : PROXY_QCOW .

libqcow : a delphi unit

delphi No Responses »

Juil 302014

This is the 4th unit based on Joachim Metz work.

This time I quickly coded a delphi wrapper for libqcow.
As previous ones : create the object, open the file, get the size, read and/or write, close…

The delphi unit is here : libqcow .

libvhdi : a delphi unit

delphi 1 Response »

Juil 222014

This is the 3rd unit based on Joachim Metz work.

This time I quickly coded a delphi wrapper for libvhdi.
As previous ones : create the object, open the file, get the size, read and/or write, close…

The delphi unit is here : libvhdi .

libvmdk : (yet) a(nother) delphi unit

delphi No Responses »

Juil 212014

I recently discovered the work of Joachim Metz.
I first decided to write a delphi wrapper unit around libewf (here) so that I could add EWF support to CloneDisk.

Today, I decided to do the same for Joachim’s libvmdk unit : another delphi wrapper.
The unit is straighforward and is based on the previous libewf one : create the object, open the file, get the size, read and/or write, close…

The delphi unit is here : libvmdk .